Update javaxval/src/test/java/org/baeldung/javaxval/messageinterpolator/ParameterMessageInterpolaterIntegrationTest.java

update to use the givenX_whenY_thenZ naming convention for tests

Co-Authored-By: KevinGilmore <kpg102@gmail.com>

persistence-modules/spring-jpa/.gitignore

@@ -0,0 +1,13 @@
+*.class
+
+#folders#
+/target
+/neoDb*
+/data
+/src/main/webapp/WEB-INF/classes
+*/META-INF/*
+
+# Packaged files #
+*.jar
+*.war
+*.ear

persistence-modules/spring-jpa/README.md

@@ -0,0 +1,26 @@
+=========
+
+## Spring JPA Example Project
+
+
+### Relevant Articles: 
+- [The DAO with JPA and Spring](http://www.baeldung.com/spring-dao-jpa)
+- [JPA Pagination](http://www.baeldung.com/jpa-pagination)
+- [Sorting with JPA](http://www.baeldung.com/jpa-sort)
+- [Self-Contained Testing Using an In-Memory Database](http://www.baeldung.com/spring-jpa-test-in-memory-database)
+- [A Guide to Spring AbstractRoutingDatasource](http://www.baeldung.com/spring-abstract-routing-data-source)
+- [Obtaining Auto-generated Keys in Spring JDBC](http://www.baeldung.com/spring-jdbc-autogenerated-keys)
+- [Transactions with Spring 4 and JPA](http://www.baeldung.com/transaction-configuration-with-jpa-and-spring)
+- [Use Criteria Queries in a Spring Data Application](https://www.baeldung.com/spring-data-criteria-queries)
+- [Many-To-Many Relationship in JPA](https://www.baeldung.com/jpa-many-to-many)
+
+
+### Eclipse Config 
+After importing the project into Eclipse, you may see the following error:  
+"No persistence xml file found in project"
+
+This can be ignored: 
+- Project -> Properties -> Java Persistance -> JPA -> Error/Warnings -> Select Ignore on "No persistence xml file found in project"
+Or: 
+- Eclipse -> Preferences - Validation - disable the "Build" execution of the JPA Validator 
+

persistence-modules/spring-jpa/pom.xml

@@ -0,0 +1,175 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>spring-jpa</artifactId>
+    <version>0.1-SNAPSHOT</version>
+    <name>spring-jpa</name>
+    <packaging>war</packaging>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+        <relativePath>../../</relativePath>
+    </parent>
+
+    <dependencies>
+        <!-- Spring -->
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-orm</artifactId>
+            <version>${org.springframework.version}</version>
+            <exclusions>
+                <exclusion>
+                    <artifactId>commons-logging</artifactId>
+                    <groupId>commons-logging</groupId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-context</artifactId>
+            <version>${org.springframework.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-webmvc</artifactId>
+            <version>${org.springframework.version}</version>
+        </dependency>
+
+        <!-- persistence -->
+
+        <dependency>
+            <groupId>org.hibernate</groupId>
+            <artifactId>hibernate-entitymanager</artifactId>
+            <version>${hibernate.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>xml-apis</groupId>
+            <artifactId>xml-apis</artifactId>
+            <version>${xml-apis.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.javassist</groupId>
+            <artifactId>javassist</artifactId>
+            <version>${javassist.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>${mysql-connector-java.version}</version>
+            <scope>runtime</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.data</groupId>
+            <artifactId>spring-data-jpa</artifactId>
+            <version>${spring-data-jpa.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <version>${h2.version}</version>
+        </dependency>
+
+        <!-- validation -->
+
+        <dependency>
+            <groupId>org.hibernate</groupId>
+            <artifactId>hibernate-validator</artifactId>
+            <version>${hibernate-validator.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>javax.el</groupId>
+            <artifactId>javax.el-api</artifactId>
+            <version>${javax.el-api.version}</version>
+        </dependency>
+
+        <!-- web -->
+        <dependency>
+            <groupId>javax.servlet</groupId>
+            <artifactId>jstl</artifactId>
+            <version>${jstl.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>javax.servlet</groupId>
+            <artifactId>servlet-api</artifactId>
+            <scope>provided</scope>
+            <version>${javax.servlet.servlet-api.version}</version>
+        </dependency>
+
+        <!-- utils -->
+
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+            <version>${guava.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+        </dependency>
+
+        <!-- test scoped -->
+
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>${commons-lang3.version}</version>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-test</artifactId>
+            <version>${org.springframework.version}</version>
+            <scope>test</scope>
+        </dependency>
+
+    </dependencies>
+
+    <build>
+        <finalName>spring-jpa</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-war-plugin</artifactId>
+                <version>${maven-war-plugin.version}</version>
+                <configuration>
+                    <warSourceDirectory>src/main/webapp</warSourceDirectory>
+                    <failOnMissingWebXml>false</failOnMissingWebXml>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <properties>
+        <!-- Spring -->
+        <org.springframework.version>5.1.5.RELEASE</org.springframework.version>
+        <javassist.version>3.21.0-GA</javassist.version>
+
+        <!-- persistence -->
+        <hibernate.version>5.2.17.Final</hibernate.version>
+        <mysql-connector-java.version>6.0.6</mysql-connector-java.version>
+        <spring-data-jpa.version>2.1.5.RELEASE</spring-data-jpa.version>
+
+        <!-- web -->
+        <javax.servlet.servlet-api.version>2.5</javax.servlet.servlet-api.version>
+
+        <!-- various -->
+        <hibernate-validator.version>6.0.15.Final</hibernate-validator.version>
+        <xml-apis.version>1.4.01</xml-apis.version>
+        <javax.el-api.version>2.2.5</javax.el-api.version>
+
+        <!-- util -->
+        <guava.version>21.0</guava.version>
+        <assertj.version>3.8.0</assertj.version>
+    </properties>
+
+</project>

persistence-modules/spring-jpa/src/main/java/com/baeldung/jdbc/autogenkey/config/PersistenceConfig.java

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+package com.baeldung.jdbc.autogenkey.config;
+
+import javax.sql.DataSource;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.env.Environment;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseBuilder;
+import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType;
+
+@Configuration
+public class PersistenceConfig {
+    
+    @Bean
+    public DataSource dataSource(Environment env) {
+        return new EmbeddedDatabaseBuilder()
+                .setType(EmbeddedDatabaseType.H2)
+                .addScript("autogenkey-schema.sql")
+                .build();
+    }
+    
+    @Bean
+    public JdbcTemplate jdbcTemplate(DataSource dataSource) {
+        return new JdbcTemplate(dataSource);
+    }
+    
+}

persistence-modules/spring-jpa/src/main/java/com/baeldung/jdbc/autogenkey/repository/MessageRepositoryJDBCTemplate.java

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+package com.baeldung.jdbc.autogenkey.repository;
+
+import java.sql.PreparedStatement;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.jdbc.support.GeneratedKeyHolder;
+import org.springframework.jdbc.support.KeyHolder;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public class MessageRepositoryJDBCTemplate {
+
+    @Autowired
+    JdbcTemplate jdbcTemplate;
+
+    final String INSERT_MESSAGE_SQL = "insert into sys_message (message) values(?) ";
+
+    public long insert(final String message) {
+        
+        KeyHolder keyHolder = new GeneratedKeyHolder();
+
+        jdbcTemplate.update(connection -> {
+            PreparedStatement ps = connection.prepareStatement(INSERT_MESSAGE_SQL);
+            ps.setString(1, message);
+            return ps;
+        }, keyHolder);
+
+        return (long) keyHolder.getKey();
+    }
+
+    final String SELECT_BY_ID = "select message from sys_message where id = ?";
+
+    public String getMessageById(long id) {
+        return this.jdbcTemplate.queryForObject(SELECT_BY_ID, String.class, new Object[] { id });
+    }
+
+}

persistence-modules/spring-jpa/src/main/java/com/baeldung/jdbc/autogenkey/repository/MessageRepositorySimpleJDBCInsert.java

@@ -0,0 +1,29 @@
+package com.baeldung.jdbc.autogenkey.repository;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.sql.DataSource;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.jdbc.core.simple.SimpleJdbcInsert;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public class MessageRepositorySimpleJDBCInsert {
+
+    SimpleJdbcInsert messageInsert;
+
+    @Autowired
+    public MessageRepositorySimpleJDBCInsert(DataSource dataSource) {
+        messageInsert = new SimpleJdbcInsert(dataSource).withTableName("sys_message").usingGeneratedKeyColumns("id");
+    }
+
+    public long insert(String message) {
+        Map<String, Object> parameters = new HashMap<String, Object>(1);
+        parameters.put("message", message);
+        Number newId = messageInsert.executeAndReturnKey(parameters);
+        return (long) newId;
+    }
+
+}

persistence-modules/spring-jpa/src/main/java/com/baeldung/manytomany/model/Course.java

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+package com.baeldung.manytomany.model;
+
+import java.util.Set;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.ManyToMany;
+import javax.persistence.OneToMany;
+import javax.persistence.Table;
+
+@Entity
+@Table(name = "course")
+public class Course {
+
+    @Id
+    @Column(name = "id")
+    private Long id;
+
+    @ManyToMany(mappedBy = "likedCourses")
+    private Set<Student> likes;
+
+    @OneToMany(mappedBy = "course")
+    private Set<CourseRating> ratings;
+
+    @OneToMany(mappedBy = "course")
+    private Set<CourseRegistration> registrations;
+
+    // additional properties
+
+    public Course() {
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public Set<CourseRating> getRatings() {
+        return ratings;
+    }
+
+    public Set<CourseRegistration> getRegistrations() {
+        return registrations;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((id == null) ? 0 : id.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        Course other = (Course) obj;
+        if (id == null) {
+            if (other.id != null)
+                return false;
+        } else if (!id.equals(other.id))
+            return false;
+        return true;
+    }
+
+}

persistence-modules/spring-jpa/src/main/java/com/baeldung/manytomany/model/CourseRating.java

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+package com.baeldung.manytomany.model;
+
+import javax.persistence.Column;
+import javax.persistence.EmbeddedId;
+import javax.persistence.Entity;
+import javax.persistence.JoinColumn;
+import javax.persistence.ManyToOne;
+import javax.persistence.MapsId;
+import javax.persistence.Table;
+
+@Entity
+@Table(name = "course_rating")
+public class CourseRating {
+
+    @EmbeddedId
+    private CourseRatingKey id;
+
+    @ManyToOne
+    @MapsId("student_id")
+    @JoinColumn(name = "student_id")
+    private Student student;
+
+    @ManyToOne
+    @MapsId("course_id")
+    @JoinColumn(name = "course_id")
+    private Course course;
+
+    @Column(name = "rating")
+    private int rating;
+
+    public CourseRating() {
+    }
+
+    public int getRating() {
+        return rating;
+    }
+
+    public void setRating(int rating) {
+        this.rating = rating;
+    }
+
+    public CourseRatingKey getId() {
+        return id;
+    }
+
+    public Student getStudent() {
+        return student;
+    }
+
+    public Course getCourse() {
+        return course;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((id == null) ? 0 : id.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        CourseRating other = (CourseRating) obj;
+        if (id == null) {
+            if (other.id != null)
+                return false;
+        } else if (!id.equals(other.id))
+            return false;
+        return true;
+    }
+
+}

persistence-modules/spring-jpa/src/main/java/com/baeldung/manytomany/model/CourseRatingKey.java

@@ -0,0 +1,59 @@
+package com.baeldung.manytomany.model;
+
+import java.io.Serializable;
+
+import javax.persistence.Column;
+import javax.persistence.Embeddable;
+
+@Embeddable
+public class CourseRatingKey implements Serializable {
+
+    @Column(name = "student_id")
+    private Long studentId;
+
+    @Column(name = "course_id")
+    private Long courseId;
+
+    public CourseRatingKey() {
+    }
+
+    public Long getStudentId() {
+        return studentId;
+    }
+
+    public Long getCourseId() {
+        return courseId;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((courseId == null) ? 0 : courseId.hashCode());
+        result = prime * result + ((studentId == null) ? 0 : studentId.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        CourseRatingKey other = (CourseRatingKey) obj;
+        if (courseId == null) {
+            if (other.courseId != null)
+                return false;
+        } else if (!courseId.equals(other.courseId))
+            return false;
+        if (studentId == null) {
+            if (other.studentId != null)
+                return false;
+        } else if (!studentId.equals(other.studentId))
+            return false;
+        return true;
+    }
+
+}

persistence-modules/spring-jpa/src/main/java/com/baeldung/manytomany/model/CourseRegistration.java

@@ -0,0 +1,100 @@
+package com.baeldung.manytomany.model;
+
+import java.time.LocalDateTime;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.JoinColumn;
+import javax.persistence.ManyToOne;
+import javax.persistence.Table;
+
+@Entity
+@Table(name = "course_registration")
+public class CourseRegistration {
+
+    @Id
+    @Column(name = "id")
+    private Long id;
+
+    @ManyToOne
+    @JoinColumn(name = "student_id")
+    private Student student;
+
+    @ManyToOne
+    @JoinColumn(name = "course_id")
+    private Course course;
+
+    @Column(name = "registered_at")
+    private LocalDateTime registeredAt;
+
+    @Column(name = "grade")
+    private int grade;
+
+    // additional properties
+
+    public CourseRegistration() {
+    }
+
+    public Student getStudent() {
+        return student;
+    }
+
+    public void setStudent(Student student) {
+        this.student = student;
+    }
+
+    public Course getCourse() {
+        return course;
+    }
+
+    public void setCourse(Course course) {
+        this.course = course;
+    }
+
+    public LocalDateTime getRegisteredAt() {
+        return registeredAt;
+    }
+
+    public void setRegisteredAt(LocalDateTime registeredAt) {
+        this.registeredAt = registeredAt;
+    }
+
+    public int getGrade() {
+        return grade;
+    }
+
+    public void setGrade(int grade) {
+        this.grade = grade;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((id == null) ? 0 : id.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        CourseRegistration other = (CourseRegistration) obj;
+        if (id == null) {
+            if (other.id != null)
+                return false;
+        } else if (!id.equals(other.id))
+            return false;
+        return true;
+    }
+
+}

persistence-modules/spring-jpa/src/main/java/com/baeldung/manytomany/model/Student.java

@@ -0,0 +1,78 @@
+package com.baeldung.manytomany.model;
+
+import java.util.Set;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.JoinColumn;
+import javax.persistence.JoinTable;
+import javax.persistence.ManyToMany;
+import javax.persistence.OneToMany;
+import javax.persistence.Table;
+
+@Entity
+@Table(name = "student")
+public class Student {
+
+    @Id
+    @Column(name = "id")
+    private Long id;
+
+    @ManyToMany
+    @JoinTable(name = "course_like", joinColumns = @JoinColumn(name = "student_id"), inverseJoinColumns = @JoinColumn(name = "course_id"))
+    private Set<Course> likedCourses;
+
+    @OneToMany(mappedBy = "student")
+    private Set<CourseRating> ratings;
+
+    @OneToMany(mappedBy = "student")
+    private Set<CourseRegistration> registrations;
+
+    // additional properties
+
+    public Student() {
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public Set<Course> getLikedCourses() {
+        return likedCourses;
+    }
+
+    public Set<CourseRating> getRatings() {
+        return ratings;
+    }
+
+    public Set<CourseRegistration> getRegistrations() {
+        return registrations;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((id == null) ? 0 : id.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        Student other = (Student) obj;
+        if (id == null) {
+            if (other.id != null)
+                return false;
+        } else if (!id.equals(other.id))
+            return false;
+        return true;
+    }
+
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/annotations/MyUtilityRepository.java

@@ -0,0 +1,14 @@
+package org.baeldung.annotations;
+
+import java.io.Serializable;
+import java.util.Optional;
+
+import org.springframework.data.repository.CrudRepository;
+import org.springframework.data.repository.NoRepositoryBean;
+
+@NoRepositoryBean
+public interface MyUtilityRepository<T, ID extends Serializable> extends CrudRepository<T, ID> {
+
+    Optional<T> findById(ID id);
+
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/annotations/Person.java

@@ -0,0 +1,54 @@
+package org.baeldung.annotations;
+
+import java.util.Date;
+
+import javax.persistence.Entity;
+import javax.persistence.NamedStoredProcedureQueries;
+import javax.persistence.NamedStoredProcedureQuery;
+import javax.persistence.ParameterMode;
+import javax.persistence.StoredProcedureParameter;
+
+import org.baeldung.persistence.multiple.model.user.User;
+import org.springframework.data.annotation.CreatedBy;
+import org.springframework.data.annotation.CreatedDate;
+import org.springframework.data.annotation.Id;
+import org.springframework.data.annotation.LastModifiedBy;
+import org.springframework.data.annotation.Transient;
+
+@Entity
+@NamedStoredProcedureQueries({ 
+    @NamedStoredProcedureQuery(
+        name = "count_by_name", 
+        procedureName = "person.count_by_name", 
+        parameters = { 
+                @StoredProcedureParameter(
+                    mode = ParameterMode.IN, 
+                    name = "name", 
+                    type = String.class),
+                @StoredProcedureParameter(
+                    mode = ParameterMode.OUT, 
+                    name = "count", 
+                    type = Long.class) 
+                }) 
+})
+public class Person {
+
+    @Id
+    private Long id;
+
+    @Transient
+    private int age;
+
+    @CreatedBy
+    private User creator;
+
+    @LastModifiedBy
+    private User modifier;
+
+    @CreatedDate
+    private Date createdAt;
+
+    @LastModifiedBy
+    private Date modifiedAt;
+
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/annotations/PersonRepository.java

@@ -0,0 +1,32 @@
+package org.baeldung.annotations;
+
+import javax.persistence.LockModeType;
+
+import org.springframework.data.jpa.repository.Lock;
+import org.springframework.data.jpa.repository.Modifying;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.jpa.repository.query.Procedure;
+import org.springframework.data.repository.query.Param;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface PersonRepository extends MyUtilityRepository<Person, Long> {
+
+    @Lock(LockModeType.NONE)
+    @Query("SELECT COUNT(*) FROM Person p")
+    long getPersonCount();
+
+    @Query("FROM Person p WHERE p.name = :name")
+    Person findByName(@Param("name") String name);
+
+    @Query(value = "SELECT AVG(p.age) FROM person p", nativeQuery = true)
+    int getAverageAge();
+
+    @Procedure(name = "count_by_name")
+    long getCountByName(@Param("name") String name);
+
+    @Modifying
+    @Query("UPDATE Person p SET p.name = :name WHERE p.id = :id")
+    void changeName(@Param("id") long id, @Param("name") String name);
+
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/config/PersistenceJPAConfig.java

@@ -0,0 +1,87 @@
+package org.baeldung.config;
+
+import java.util.Properties;
+
+import javax.persistence.EntityManagerFactory;
+import javax.sql.DataSource;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.PropertySource;
+import org.springframework.core.env.Environment;
+import org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor;
+import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
+import org.springframework.jdbc.datasource.DriverManagerDataSource;
+import org.springframework.orm.jpa.JpaTransactionManager;
+import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
+import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
+import org.springframework.transaction.PlatformTransactionManager;
+import org.springframework.transaction.annotation.EnableTransactionManagement;
+
+import com.google.common.base.Preconditions;
+
+@Configuration
+@EnableTransactionManagement
+@PropertySource({ "classpath:persistence-h2.properties" })
+@ComponentScan({ "org.baeldung.persistence" })
+@EnableJpaRepositories(basePackages = "org.baeldung.persistence.dao")
+public class PersistenceJPAConfig {
+
+    @Autowired
+    private Environment env;
+
+    public PersistenceJPAConfig() {
+        super();
+    }
+
+    // beans
+
+    @Bean
+    public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
+        final LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
+        em.setDataSource(dataSource());
+        em.setPackagesToScan(new String[] { "org.baeldung.persistence.model" });
+
+        final HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
+        em.setJpaVendorAdapter(vendorAdapter);
+        em.setJpaProperties(additionalProperties());
+
+        return em;
+    }
+
+    @Bean
+    public DataSource dataSource() {
+        final DriverManagerDataSource dataSource = new DriverManagerDataSource();
+        dataSource.setDriverClassName(Preconditions.checkNotNull(env.getProperty("jdbc.driverClassName")));
+        dataSource.setUrl(Preconditions.checkNotNull(env.getProperty("jdbc.url")));
+        dataSource.setUsername(Preconditions.checkNotNull(env.getProperty("jdbc.user")));
+        dataSource.setPassword(Preconditions.checkNotNull(env.getProperty("jdbc.pass")));
+
+        return dataSource;
+    }
+
+    @Bean
+    public PlatformTransactionManager transactionManager(final EntityManagerFactory emf) {
+        final JpaTransactionManager transactionManager = new JpaTransactionManager();
+        transactionManager.setEntityManagerFactory(emf);
+        return transactionManager;
+    }
+
+    @Bean
+    public PersistenceExceptionTranslationPostProcessor exceptionTranslation() {
+        return new PersistenceExceptionTranslationPostProcessor();
+    }
+
+    final Properties additionalProperties() {
+        final Properties hibernateProperties = new Properties();
+        hibernateProperties.setProperty("hibernate.hbm2ddl.auto", env.getProperty("hibernate.hbm2ddl.auto"));
+        hibernateProperties.setProperty("hibernate.dialect", env.getProperty("hibernate.dialect"));
+        hibernateProperties.setProperty("hibernate.cache.use_second_level_cache", "false");
+        
+    
+        return hibernateProperties;
+    }
+
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/config/PersistenceJPAConfigXml.java

@@ -0,0 +1,17 @@
+package org.baeldung.config;
+
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.ImportResource;
+import org.springframework.transaction.annotation.EnableTransactionManagement;
+
+// @Configuration
+@EnableTransactionManagement
+@ComponentScan({ "org.baeldung.persistence" })
+@ImportResource({ "classpath:jpaConfig.xml" })
+public class PersistenceJPAConfigXml {
+
+    public PersistenceJPAConfigXml() {
+        super();
+    }
+
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/config/SpringWebConfig.java

@@ -0,0 +1,24 @@
+package org.baeldung.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.EnableWebMvc;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
+import org.springframework.web.servlet.view.InternalResourceViewResolver;
+import org.springframework.web.servlet.view.JstlView;
+
+@EnableWebMvc
+@Configuration
+@ComponentScan({ "org.baeldung.web" })
+public class SpringWebConfig extends WebMvcConfigurerAdapter {
+
+    @Bean
+    public InternalResourceViewResolver viewResolver() {
+        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
+        viewResolver.setViewClass(JstlView.class);
+        viewResolver.setPrefix("/WEB-INF/views/jsp/");
+        viewResolver.setSuffix(".jsp");
+        return viewResolver;
+    }
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/config/StudentJpaConfig.java

@@ -0,0 +1,68 @@
+package org.baeldung.config;
+
+import java.util.Properties;
+
+import javax.persistence.EntityManagerFactory;
+import javax.sql.DataSource;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.PropertySource;
+import org.springframework.core.env.Environment;
+import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
+import org.springframework.jdbc.datasource.DriverManagerDataSource;
+import org.springframework.orm.jpa.JpaTransactionManager;
+import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
+import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
+import org.springframework.transaction.annotation.EnableTransactionManagement;
+
+@Configuration
+@EnableJpaRepositories(basePackages = "org.baeldung.inmemory.persistence.dao")
+@PropertySource("persistence-student.properties")
+@EnableTransactionManagement
+public class StudentJpaConfig {
+
+    @Autowired
+    private Environment env;
+
+    @Bean
+    public DataSource dataSource() {
+        final DriverManagerDataSource dataSource = new DriverManagerDataSource();
+        dataSource.setDriverClassName(env.getProperty("jdbc.driverClassName"));
+        dataSource.setUrl(env.getProperty("jdbc.url"));
+        dataSource.setUsername(env.getProperty("jdbc.user"));
+        dataSource.setPassword(env.getProperty("jdbc.pass"));
+
+        return dataSource;
+    }
+
+    @Bean
+    public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
+        final LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
+        em.setDataSource(dataSource());
+        em.setPackagesToScan(new String[] { "org.baeldung.inmemory.persistence.model" });
+        em.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
+        em.setJpaProperties(additionalProperties());
+        return em;
+    }
+
+    @Bean
+    JpaTransactionManager transactionManager(EntityManagerFactory entityManagerFactory) {
+        JpaTransactionManager transactionManager = new JpaTransactionManager();
+        transactionManager.setEntityManagerFactory(entityManagerFactory);
+        return transactionManager;
+    }
+
+    final Properties additionalProperties() {
+        final Properties hibernateProperties = new Properties();
+
+        hibernateProperties.setProperty("hibernate.hbm2ddl.auto", env.getProperty("hibernate.hbm2ddl.auto"));
+        hibernateProperties.setProperty("hibernate.dialect", env.getProperty("hibernate.dialect"));
+        hibernateProperties.setProperty("hibernate.show_sql", env.getProperty("hibernate.show_sql"));
+        hibernateProperties.setProperty("hibernate.cache.use_second_level_cache", env.getProperty("hibernate.cache.use_second_level_cache"));
+        hibernateProperties.setProperty("hibernate.cache.use_query_cache", env.getProperty("hibernate.cache.use_query_cache"));
+
+        return hibernateProperties;
+    }
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/config/WebInitializer.java

@@ -0,0 +1,20 @@
+package org.baeldung.config;
+
+import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
+
+public class WebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
+    @Override
+    protected Class<?>[] getRootConfigClasses() {
+        return new Class[] { PersistenceJPAConfig.class };
+    }
+
+    @Override
+    protected Class<?>[] getServletConfigClasses() {
+        return new Class[] { SpringWebConfig.class };
+    }
+
+    @Override
+    protected String[] getServletMappings() {
+        return new String[] { "/" };
+    }
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/dsrouting/ClientDao.java

@@ -0,0 +1,28 @@
+package org.baeldung.dsrouting;
+
+import javax.sql.DataSource;
+
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.jdbc.core.RowMapper;
+
+/**
+ * Database access code for datasource routing example.
+ */
+public class ClientDao {
+
+    private static final String SQL_GET_CLIENT_NAME = "select name from client";
+
+    private final JdbcTemplate jdbcTemplate;
+
+    public ClientDao(DataSource datasource) {
+        this.jdbcTemplate = new JdbcTemplate(datasource);
+    }
+
+    public String getClientName() {
+        return this.jdbcTemplate.query(SQL_GET_CLIENT_NAME, rowMapper).get(0);
+    }
+
+    private static RowMapper<String> rowMapper = (rs, rowNum) -> {
+        return rs.getString("name");
+    };
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/dsrouting/ClientDataSourceRouter.java

@@ -0,0 +1,14 @@
+package org.baeldung.dsrouting;
+
+import org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource;
+
+/**
+ * Returns thread bound client lookup key for current context.
+ */
+public class ClientDataSourceRouter extends AbstractRoutingDataSource {
+
+    @Override
+    protected Object determineCurrentLookupKey() {
+        return ClientDatabaseContextHolder.getClientDatabase();
+    }
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/dsrouting/ClientDatabase.java

@@ -0,0 +1,7 @@
+package org.baeldung.dsrouting;
+
+public enum ClientDatabase {
+
+    CLIENT_A, CLIENT_B
+
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/dsrouting/ClientDatabaseContextHolder.java

@@ -0,0 +1,26 @@
+package org.baeldung.dsrouting;
+
+import org.springframework.util.Assert;
+
+/**
+ * Thread shared context to point to the datasource which should be used. This
+ * enables context switches between different clients.
+ */
+public class ClientDatabaseContextHolder {
+
+    private static final ThreadLocal<ClientDatabase> CONTEXT = new ThreadLocal<>();
+
+    public static void set(ClientDatabase clientDatabase) {
+        Assert.notNull(clientDatabase, "clientDatabase cannot be null");
+        CONTEXT.set(clientDatabase);
+    }
+
+    public static ClientDatabase getClientDatabase() {
+        return CONTEXT.get();
+    }
+
+    public static void clear() {
+        CONTEXT.remove();
+    }
+
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/dsrouting/ClientService.java

@@ -0,0 +1,21 @@
+package org.baeldung.dsrouting;
+
+/**
+ * Service layer code for datasource routing example.  Here, the service methods are responsible
+ * for setting and clearing the context.
+ */
+public class ClientService {
+
+    private final ClientDao clientDao;
+
+    public ClientService(ClientDao clientDao) {
+        this.clientDao = clientDao;
+    }
+
+    public String getClientName(ClientDatabase clientDb) {
+        ClientDatabaseContextHolder.set(clientDb);
+        String clientName = this.clientDao.getClientName();
+        ClientDatabaseContextHolder.clear();
+        return clientName;
+    }
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/inmemory/persistence/dao/ManyStudentRepository.java

@@ -0,0 +1,10 @@
+package org.baeldung.inmemory.persistence.dao;
+
+import org.baeldung.inmemory.persistence.model.ManyStudent;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.List;
+
+public interface ManyStudentRepository extends JpaRepository<ManyStudent, Long> {
+    List<ManyStudent> findByManyTags_Name(String name);
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/inmemory/persistence/dao/ManyTagRepository.java

@@ -0,0 +1,7 @@
+package org.baeldung.inmemory.persistence.dao;
+
+import org.baeldung.inmemory.persistence.model.ManyTag;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface ManyTagRepository extends JpaRepository<ManyTag, Long> {
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/inmemory/persistence/dao/StudentRepository.java

@@ -0,0 +1,24 @@
+package org.baeldung.inmemory.persistence.dao;
+
+import org.baeldung.inmemory.persistence.model.Student;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+
+import java.util.List;
+
+public interface StudentRepository extends JpaRepository<Student, Long> {
+
+    @Query("SELECT s FROM Student s JOIN s.tags t WHERE t = LOWER(:tag)")
+    List<Student> retrieveByTag(@Param("tag") String tag);
+
+    @Query("SELECT s FROM Student s JOIN s.tags t WHERE s.name = LOWER(:name) AND t = LOWER(:tag)")
+    List<Student> retrieveByNameFilterByTag(@Param("name") String name, @Param("tag") String tag);
+
+    @Query("SELECT s FROM Student s JOIN s.skillTags t WHERE t.name = LOWER(:tagName) AND t.value > :tagValue")
+    List<Student> retrieveByNameFilterByMinimumSkillTag(@Param("tagName") String tagName, @Param("tagValue") int tagValue);
+
+    @Query("SELECT s FROM Student s JOIN s.kvTags t WHERE t.key = LOWER(:key)")
+    List<Student> retrieveByKeyTag(@Param("key") String key);
+
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/inmemory/persistence/model/KVTag.java

@@ -0,0 +1,34 @@
+package org.baeldung.inmemory.persistence.model;
+
+import javax.persistence.Embeddable;
+
+@Embeddable
+public class KVTag {
+    private String key;
+    private String value;
+
+    public KVTag() {
+    }
+
+    public KVTag(String key, String value) {
+        super();
+        this.key = key;
+        this.value = value;
+    }
+
+    public String getKey() {
+        return key;
+    }
+
+    public void setKey(String key) {
+        this.key = key;
+    }
+
+    public String getValue() {
+        return value;
+    }
+
+    public void setValue(String value) {
+        this.value = value;
+    }
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/inmemory/persistence/model/LocationTag.java

@@ -0,0 +1,40 @@
+package org.baeldung.inmemory.persistence.model;
+
+import javax.persistence.Embeddable;
+
+@Embeddable
+public class LocationTag {
+    private String name;
+    private int xPos;
+    private int yPos;
+
+    public LocationTag() {
+    }
+
+    public LocationTag(String name, int xPos, int yPos) {
+        super();
+        this.name = name;
+        this.xPos = xPos;
+        this.yPos = yPos;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getxPos() {
+        return xPos;
+    }
+
+    public void setxPos(int xPos) {
+        this.xPos = xPos;
+    }
+
+    public int getyPos() {
+        return yPos;
+    }
+
+    public void setyPos(int yPos) {
+        this.yPos = yPos;
+    }
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/inmemory/persistence/model/ManyStudent.java

@@ -0,0 +1,33 @@
+package org.baeldung.inmemory.persistence.model;
+
+import javax.persistence.*;
+import java.util.HashSet;
+import java.util.Set;
+
+@Entity
+public class ManyStudent {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private int id;
+    private String name;
+
+    @ManyToMany(cascade = CascadeType.ALL)
+    @JoinTable(name = "manystudent_manytags", joinColumns = @JoinColumn(name = "manystudent_id", referencedColumnName = "id"), inverseJoinColumns = @JoinColumn(name = "manytag_id", referencedColumnName = "id"))
+    private Set<ManyTag> manyTags = new HashSet<>();
+
+    public ManyStudent() {
+    }
+
+    public ManyStudent(String name) {
+        this.name = name;
+    }
+
+    public Set<ManyTag> getManyTags() {
+        return manyTags;
+    }
+
+    public void setManyTags(Set<ManyTag> manyTags) {
+        this.manyTags.addAll(manyTags);
+    }
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/inmemory/persistence/model/ManyTag.java

@@ -0,0 +1,40 @@
+package org.baeldung.inmemory.persistence.model;
+
+import javax.persistence.*;
+import java.util.HashSet;
+import java.util.Set;
+
+@Entity
+public class ManyTag {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private int id;
+    private String name;
+
+    @ManyToMany(mappedBy = "manyTags")
+    private Set<ManyStudent> students = new HashSet<>();
+
+    public ManyTag() {
+    }
+
+    public ManyTag(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Set<ManyStudent> getStudents() {
+        return students;
+    }
+
+    public void setStudents(Set<ManyStudent> students) {
+        this.students.addAll(students);
+    }
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/inmemory/persistence/model/SkillTag.java

@@ -0,0 +1,30 @@
+package org.baeldung.inmemory.persistence.model;
+
+import javax.persistence.Embeddable;
+
+@Embeddable
+public class SkillTag {
+    private String name;
+    private int value;
+
+    public SkillTag() {
+    }
+
+    public SkillTag(String name, int value) {
+        super();
+        this.name = name;
+        this.value = value;
+    }
+
+    public int getValue() {
+        return value;
+    }
+
+    public void setValue(int value) {
+        this.value = value;
+    }
+
+    public String getName() {
+        return name;
+    }
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/inmemory/persistence/model/Student.java

@@ -0,0 +1,74 @@
+package org.baeldung.inmemory.persistence.model;
+
+import java.util.ArrayList;
+import java.util.List;
+import javax.persistence.ElementCollection;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+
+@Entity
+public class Student {
+
+    @Id
+    private long id;
+    private String name;
+
+    @ElementCollection
+    private List<String> tags = new ArrayList<>();
+
+    @ElementCollection
+    private List<SkillTag> skillTags = new ArrayList<>();
+
+    @ElementCollection
+    private List<KVTag> kvTags = new ArrayList<>();
+
+    public Student() {
+    }
+
+    public Student(long id, String name) {
+        super();
+        this.id = id;
+        this.name = name;
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public List<String> getTags() {
+        return tags;
+    }
+
+    public void setTags(List<String> tags) {
+        this.tags.addAll(tags);
+    }
+
+    public List<SkillTag> getSkillTags() {
+        return skillTags;
+    }
+
+    public void setSkillTags(List<SkillTag> skillTags) {
+        this.skillTags.addAll(skillTags);
+    }
+
+    public List<KVTag> getKVTags() {
+        return this.kvTags;
+    }
+
+    public void setKVTags(List<KVTag> kvTags) {
+        this.kvTags.addAll(kvTags);
+    }
+
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/persistence/dao/AbstractJpaDAO.java

@@ -0,0 +1,46 @@
+package org.baeldung.persistence.dao;
+
+import java.io.Serializable;
+import java.util.List;
+
+import javax.persistence.EntityManager;
+import javax.persistence.PersistenceContext;
+
+public abstract class AbstractJpaDAO<T extends Serializable> {
+
+    private Class<T> clazz;
+
+    @PersistenceContext
+    private EntityManager entityManager;
+
+    public final void setClazz(final Class<T> clazzToSet) {
+        this.clazz = clazzToSet;
+    }
+
+    public T findOne(final long id) {
+        return entityManager.find(clazz, id);
+    }
+
+    @SuppressWarnings("unchecked")
+    public List<T> findAll() {
+        return entityManager.createQuery("from " + clazz.getName()).getResultList();
+    }
+
+    public void create(final T entity) {
+        entityManager.persist(entity);
+    }
+
+    public T update(final T entity) {
+        return entityManager.merge(entity);
+    }
+
+    public void delete(final T entity) {
+        entityManager.remove(entity);
+    }
+
+    public void deleteById(final long entityId) {
+        final T entity = findOne(entityId);
+        delete(entity);
+    }
+
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/persistence/dao/BookRepository.java

@@ -0,0 +1,9 @@
+package org.baeldung.persistence.dao;
+
+import org.baeldung.persistence.model.Book;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
+
+public interface BookRepository extends JpaRepository<Book, Long>, BookRepositoryCustom, JpaSpecificationExecutor<Book> {
+
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/persistence/dao/BookRepositoryCustom.java

@@ -0,0 +1,11 @@
+package org.baeldung.persistence.dao;
+
+import java.util.List;
+
+import org.baeldung.persistence.model.Book;
+
+public interface BookRepositoryCustom {
+
+    List<Book> findBooksByAuthorNameAndTitle(String authorName, String title);
+    
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/persistence/dao/BookRepositoryImpl.java

@@ -0,0 +1,45 @@
+package org.baeldung.persistence.dao;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.persistence.EntityManager;
+import javax.persistence.TypedQuery;
+import javax.persistence.criteria.CriteriaBuilder;
+import javax.persistence.criteria.CriteriaQuery;
+import javax.persistence.criteria.Predicate;
+import javax.persistence.criteria.Root;
+
+import org.baeldung.persistence.model.Book;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public class BookRepositoryImpl implements BookRepositoryCustom {
+
+    private EntityManager em;
+
+    public BookRepositoryImpl(EntityManager em) {
+        this.em = em;
+    }
+
+    @Override
+    public List<Book> findBooksByAuthorNameAndTitle(String authorName, String title) {
+        CriteriaBuilder cb = em.getCriteriaBuilder();
+        CriteriaQuery<Book> cq = cb.createQuery(Book.class);
+
+        Root<Book> book = cq.from(Book.class);
+        List<Predicate> predicates = new ArrayList<>();
+
+        if (authorName != null) {
+            predicates.add(cb.equal(book.get("author"), authorName));
+        }
+        if (title != null) {
+            predicates.add(cb.like(book.get("title"), "%" + title + "%"));
+        }
+        cq.where(predicates.toArray(new Predicate[0]));
+
+        TypedQuery<Book> query = em.createQuery(cq);
+        return query.getResultList();
+    }
+
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/persistence/dao/BookService.java

@@ -0,0 +1,25 @@
+package org.baeldung.persistence.dao;
+
+import static org.baeldung.persistence.dao.BookSpecifications.hasAuthor;
+import static org.baeldung.persistence.dao.BookSpecifications.titleContains;
+import static org.springframework.data.jpa.domain.Specifications.where;
+
+import java.util.List;
+
+import org.baeldung.persistence.model.Book;
+import org.springframework.stereotype.Service;
+
+@Service
+public class BookService {
+
+    private BookRepository bookRepository;
+
+    public BookService(BookRepository bookRepository) {
+        this.bookRepository = bookRepository;
+    }
+
+    public List<Book> query(String author, String title) {
+        return bookRepository.findAll(where(hasAuthor(author)).and(titleContains(title)));
+    }
+
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/persistence/dao/BookSpecifications.java

@@ -0,0 +1,16 @@
+package org.baeldung.persistence.dao;
+
+import org.baeldung.persistence.model.Book;
+import org.springframework.data.jpa.domain.Specification;
+
+public class BookSpecifications {
+
+    public static Specification<Book> hasAuthor(String author) {
+        return (book, cq, cb) -> cb.equal(book.get("author"), author);
+    }
+
+    public static Specification<Book> titleContains(String title) {
+        return (book, cq, cb) -> cb.like(book.get("title"), "%" + title + "%");
+    }
+
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/persistence/dao/FooDao.java

@@ -0,0 +1,17 @@
+package org.baeldung.persistence.dao;
+
+import org.baeldung.persistence.model.Foo;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public class FooDao extends AbstractJpaDAO<Foo> implements IFooDao {
+
+    public FooDao() {
+        super();
+
+        setClazz(Foo.class);
+    }
+
+    // API
+
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/persistence/dao/IFooDao.java

@@ -0,0 +1,21 @@
+package org.baeldung.persistence.dao;
+
+import java.util.List;
+
+import org.baeldung.persistence.model.Foo;
+
+public interface IFooDao {
+
+    Foo findOne(long id);
+
+    List<Foo> findAll();
+
+    void create(Foo entity);
+
+    Foo update(Foo entity);
+
+    void delete(Foo entity);
+
+    void deleteById(long entityId);
+
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/persistence/model/Bar.java

@@ -0,0 +1,102 @@
+package org.baeldung.persistence.model;
+
+import java.io.Serializable;
+import java.util.List;
+
+import javax.persistence.CascadeType;
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.FetchType;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.OneToMany;
+import javax.persistence.OrderBy;
+
+@Entity
+public class Bar implements Serializable {
+    private static final long serialVersionUID = 1L;
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private long id;
+
+    @Column(nullable = false)
+    private String name;
+
+    @OneToMany(mappedBy = "bar", fetch = FetchType.EAGER, cascade = CascadeType.ALL)
+    @OrderBy("name ASC")
+    List<Foo> fooList;
+
+    public Bar() {
+        super();
+    }
+
+    public Bar(final String name) {
+        super();
+
+        this.name = name;
+    }
+
+    // API
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(final long id) {
+
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(final String name) {
+        this.name = name;
+    }
+
+    public List<Foo> getFooList() {
+        return fooList;
+    }
+
+    public void setFooList(final List<Foo> fooList) {
+        this.fooList = fooList;
+    }
+
+    //
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((name == null) ? 0 : name.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        final Bar other = (Bar) obj;
+        if (name == null) {
+            if (other.name != null)
+                return false;
+        } else if (!name.equals(other.name))
+            return false;
+        return true;
+    }
+
+    @Override
+    public String toString() {
+        final StringBuilder builder = new StringBuilder();
+        builder.append("Bar [name=").append(name).append("]");
+        return builder.toString();
+    }
+
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/persistence/model/Book.java

@@ -0,0 +1,36 @@
+package org.baeldung.persistence.model;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+
+@Entity
+public class Book {
+
+    @Id
+    private Long id;
+
+    private String title;
+
+    private String author;
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public String getAuthor() {
+        return author;
+    }
+
+    public void setAuthor(String author) {
+        this.author = author;
+    }
+
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/persistence/model/Foo.java

@@ -0,0 +1,92 @@
+package org.baeldung.persistence.model;
+
+import org.hibernate.annotations.CacheConcurrencyStrategy;
+
+import javax.persistence.*;
+import java.io.Serializable;
+
+@Entity
+@Cacheable
+@org.hibernate.annotations.Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
+public class Foo implements Serializable {
+
+    private static final long serialVersionUID = 1L;
+
+    public Foo() {
+        super();
+    }
+
+    public Foo(final String name) {
+        super();
+
+        this.name = name;
+    }
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    @Column(name = "ID")
+    private Long id;
+    @Column(name = "NAME")
+    private String name;
+
+    @ManyToOne(targetEntity = Bar.class, fetch = FetchType.EAGER)
+    @JoinColumn(name = "BAR_ID")
+    private Bar bar;
+
+    public Bar getBar() {
+        return bar;
+    }
+
+    public void setBar(final Bar bar) {
+        this.bar = bar;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(final Long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(final String name) {
+        this.name = name;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((name == null) ? 0 : name.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        final Foo other = (Foo) obj;
+        if (name == null) {
+            if (other.name != null)
+                return false;
+        } else if (!name.equals(other.name))
+            return false;
+        return true;
+    }
+
+    @Override
+    public String toString() {
+        final StringBuilder builder = new StringBuilder();
+        builder.append("Foo [name=").append(name).append("]");
+        return builder.toString();
+    }
+
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/persistence/multiple/model/user/Possession.java

@@ -0,0 +1,82 @@
+package org.baeldung.persistence.multiple.model.user;
+
+import javax.persistence.*;
+
+@Entity
+@Table(schema = "spring_jpa_user")
+public class Possession {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private long id;
+
+    private String name;
+
+    public Possession() {
+        super();
+    }
+
+    public Possession(final String name) {
+        super();
+
+        this.name = name;
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(final int id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(final String name) {
+        this.name = name;
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = (prime * result) + (int) (id ^ (id >>> 32));
+        result = (prime * result) + ((name == null) ? 0 : name.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        final Possession other = (Possession) obj;
+        if (id != other.id) {
+            return false;
+        }
+        if (name == null) {
+            if (other.name != null) {
+                return false;
+            }
+        } else if (!name.equals(other.name)) {
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public String toString() {
+        final StringBuilder builder = new StringBuilder();
+        builder.append("Possesion [id=").append(id).append(", name=").append(name).append("]");
+        return builder.toString();
+    }
+
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/persistence/multiple/model/user/User.java

@@ -0,0 +1,74 @@
+package org.baeldung.persistence.multiple.model.user;
+
+import javax.persistence.*;
+import java.util.List;
+
+@Entity
+@Table(schema = "spring_jpa_user")
+public class User {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private int id;
+
+    private String name;
+
+    @Column(unique = true, nullable = false)
+    private String email;
+
+    private int age;
+
+    @OneToMany
+    List<Possession> possessionList;
+
+    public User() {
+        super();
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(final int id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(final String name) {
+        this.name = name;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(final String email) {
+        this.email = email;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public void setAge(final int age) {
+        this.age = age;
+    }
+
+    public List<Possession> getPossessionList() {
+        return possessionList;
+    }
+
+    public void setPossessionList(List<Possession> possessionList) {
+        this.possessionList = possessionList;
+    }
+
+    @Override
+    public String toString() {
+        final StringBuilder builder = new StringBuilder();
+        builder.append("User [name=").append(name).append(", id=").append(id).append("]");
+        return builder.toString();
+    }
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/persistence/service/FooService.java

@@ -0,0 +1,36 @@
+package org.baeldung.persistence.service;
+
+import java.util.List;
+
+import org.baeldung.persistence.dao.IFooDao;
+import org.baeldung.persistence.model.Foo;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@Transactional
+public class FooService {
+
+    @Autowired
+    private IFooDao dao;
+
+    public FooService() {
+        super();
+    }
+
+    // API
+
+    public void create(final Foo entity) {
+        dao.create(entity);
+    }
+
+    public Foo findOne(final long id) {
+        return dao.findOne(id);
+    }
+
+    public List<Foo> findAll() {
+        return dao.findAll();
+    }
+
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/sqlfiles/Country.java

@@ -0,0 +1,36 @@
+package org.baeldung.sqlfiles;
+
+import static javax.persistence.GenerationType.IDENTITY;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+
+@Entity
+public class Country {
+
+    @Id
+    @GeneratedValue(strategy = IDENTITY)
+    private Integer id;
+
+    @Column(nullable = false)
+    private String name;
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+}

persistence-modules/spring-jpa/src/main/java/org/baeldung/web/MainController.java

@@ -0,0 +1,21 @@
+package org.baeldung.web;
+
+import org.baeldung.persistence.service.FooService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+
+@Controller
+public class MainController {
+
+    @Autowired
+    private FooService fooService;
+
+    @GetMapping("/")
+    public String main(Model model) {
+        model.addAttribute("foos", fooService.findAll());
+        return "index";
+    }
+
+}

persistence-modules/spring-jpa/src/main/resources/autogenkey-schema.sql

@@ -0,0 +1,5 @@
+CREATE TABLE IF NOT EXISTS sys_message (
+  id bigint(20) NOT NULL AUTO_INCREMENT,
+  message varchar(100) NOT NULL,
+  PRIMARY KEY (id)
+);

persistence-modules/spring-jpa/src/main/resources/context.xml

@@ -0,0 +1 @@
+ <ResourceLink name="jdbc/BaeldungDatabase" global="jdbc/BaeldungDatabase" type="javax.sql.DataSource"/>

persistence-modules/spring-jpa/src/main/resources/logback.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>web - %date [%thread] %-5level %logger{36} - %message%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <logger name="org.springframework" level="WARN" />
+    <logger name="org.springframework.transaction" level="WARN" />
+
+    <!-- in order to debug some marshalling issues, this needs to be TRACE -->
+    <logger name="org.springframework.web.servlet.mvc" level="WARN" />
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

persistence-modules/spring-jpa/src/main/resources/persistence-h2.properties

@@ -0,0 +1,10 @@
+# jdbc.X
+jdbc.driverClassName=org.h2.Driver
+jdbc.url=jdbc:h2:mem:db;DB_CLOSE_DELAY=-1
+jdbc.user=sa
+jdbc.pass=
+
+# hibernate.X
+hibernate.dialect=org.hibernate.dialect.H2Dialect
+hibernate.show_sql=true
+hibernate.hbm2ddl.auto=create-drop

persistence-modules/spring-jpa/src/main/resources/persistence-mysql.properties

@@ -0,0 +1,12 @@
+# jdbc.X
+jdbc.driverClassName=com.mysql.cj.jdbc.Driver
+jdbc.url=jdbc:mysql://localhost:3306/spring_jpa_01?createDatabaseIfNotExist=true
+jdbc.user=tutorialuser
+jdbc.pass=tutorialmy5ql
+
+# hibernate.X
+hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
+hibernate.show_sql=false
+hibernate.hbm2ddl.auto=create-drop
+hibernate.cache.use_second_level_cache=false
+hibernate.cache.use_query_cache=false

persistence-modules/spring-jpa/src/main/resources/persistence-student-h2.properties

@@ -0,0 +1,12 @@
+# jdbc.X
+jdbc.driverClassName=org.h2.Driver
+jdbc.url=jdbc:h2:mem:db;DB_CLOSE_DELAY=-1
+jdbc.user=sa
+jdbc.pass=
+
+# hibernate.X
+hibernate.dialect=org.hibernate.dialect.H2Dialect
+hibernate.show_sql=true
+hibernate.hbm2ddl.auto=create-drop
+hibernate.cache.use_second_level_cache=false
+hibernate.cache.use_query_cache=false

persistence-modules/spring-jpa/src/main/resources/persistence-student.properties

@@ -0,0 +1,11 @@
+jdbc.driverClassName=com.mysql.cj.jdbc.Driver
+jdbc.url=jdbc:mysql://localhost:3306/myDb
+jdbc.user=tutorialuser
+jdbc.pass=tutorialpass
+
+hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
+hibernate.show_sql=true
+hibernate.hbm2ddl.auto=create-drop
+
+hibernate.cache.use_second_level_cache=false
+hibernate.cache.use_query_cache=false

persistence-modules/spring-jpa/src/main/resources/persistence.xml

@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
+    xmlns:tx="http://www.springframework.org/schema/tx"
+    xsi:schemaLocation="
+      http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
+      http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd
+      http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd"
+>
+
+    <context:property-placeholder location="classpath:persistence-h2.properties"/>
+
+    <bean id="myEmf" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
+        <property name="dataSource" ref="dataSource"/>
+        <property name="packagesToScan" value="org.baeldung.persistence.model"/>
+        <property name="jpaVendorAdapter">
+            <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"/>
+            <!-- <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" /> <property name="generateDdl" value="${jpa.generateDdl}" /> <property name="databasePlatform" 
+                value="${persistence.dialect}" /> </bean> -->
+        </property>
+        <property name="jpaProperties">
+            <props>
+                <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>
+                <prop key="hibernate.dialect">${hibernate.dialect}</prop>
+            </props>
+        </property>
+    </bean>
+
+    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
+        <property name="driverClassName" value="${jdbc.driverClassName}"/>
+        <property name="url" value="${jdbc.url}"/>
+        <property name="username" value="${jdbc.user}"/>
+        <property name="password" value="${jdbc.pass}"/>
+    </bean>
+
+    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
+        <property name="entityManagerFactory" ref="myEmf"/>
+    </bean>
+    <tx:annotation-driven/>
+
+    <bean id="persistenceExceptionTranslationPostProcessor" class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"/>
+
+</beans>

persistence-modules/spring-jpa/src/main/resources/server.xml

@@ -0,0 +1,6 @@
+
+
+    <Resource name="jdbc/BaeldungDatabase" auth="Container"
+              type="javax.sql.DataSource" driverClassName="org.postgresql.Driver"
+              url="jdbc:postgresql://localhost:5432/postgres"
+              username="baeldung" password="pass1234" maxActive="20" maxIdle="10" maxWait="-1"/>

persistence-modules/spring-jpa/src/main/resources/sqlfiles.properties

@@ -0,0 +1 @@
+spring.jpa.hibernate.ddl-auto=none

persistence-modules/spring-jpa/src/main/webapp/WEB-INF/views/jsp/index.jsp

@@ -0,0 +1,14 @@
+<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
+<!DOCTYPE html>
+<html lang="en">
+<head>
+<title>Baeldung - Spring JNA JNDI</title>
+</head>
+<body>
+	<c:forEach var="foo" items="${foos}">
+		<p>
+			<c:out value="${foo.name}" />
+		</p>
+	</c:forEach>
+</body>
+</html>

persistence-modules/spring-jpa/src/test/java/META-INF/persistence.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence"
+             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+             xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
+    <persistence-unit name="punit">
+        <class>org.baeldung.persistence.model.Foo</class>
+        <class>org.baeldung.persistence.model.Bar</class>
+        <properties>
+            <property name="javax.persistence.jdbc.user" value="root"/>
+            <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>
+            <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/HIBERTEST"/>
+            <property name="javax.persistence.ddl-generation" value="drop-and-create-tables"/>
+            <property name="javax.persistence.logging.level" value="INFO"/>
+            <property name="hibernate.show_sql" value="true"/>
+            <property name="hibernate.cache.use_second_level_cache" value="false"/>
+            <property name="hibernate.cache.use_query_cache" value="false"/>
+        </properties>
+
+    </persistence-unit>
+</persistence>

persistence-modules/spring-jpa/src/test/java/com/baeldung/SpringContextIntegrationTest.java

@@ -0,0 +1,21 @@
+package com.baeldung;
+
+import org.baeldung.config.PersistenceJPAConfig;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+import org.springframework.test.context.web.WebAppConfiguration;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = { PersistenceJPAConfig.class }, loader = AnnotationConfigContextLoader.class)
+@WebAppConfiguration
+@DirtiesContext
+public class SpringContextIntegrationTest {
+
+    @Test
+    public void whenSpringContextIsBootstrapped_thenNoExceptions() {
+    }
+}

persistence-modules/spring-jpa/src/test/java/com/baeldung/SpringContextTest.java

@@ -0,0 +1,21 @@
+package com.baeldung;
+
+import org.baeldung.config.PersistenceJPAConfig;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+import org.springframework.test.context.web.WebAppConfiguration;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = { PersistenceJPAConfig.class }, loader = AnnotationConfigContextLoader.class)
+@WebAppConfiguration
+@DirtiesContext
+public class SpringContextTest {
+
+    @Test
+    public void whenSpringContextIsBootstrapped_thenNoExceptions() {
+    }
+}

persistence-modules/spring-jpa/src/test/java/com/baeldung/jdbc/autogenkey/GetAutoGenKeyByJDBC.java

@@ -0,0 +1,49 @@
+package com.baeldung.jdbc.autogenkey;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import com.baeldung.jdbc.autogenkey.repository.MessageRepositoryJDBCTemplate;
+import com.baeldung.jdbc.autogenkey.repository.MessageRepositorySimpleJDBCInsert;
+
+@RunWith(SpringRunner.class)
+public class GetAutoGenKeyByJDBC {
+
+    @Configuration
+    @ComponentScan(basePackages = { "com.baeldung.jdbc.autogenkey" })
+    public static class SpringConfig {
+
+    }
+
+    @Autowired
+    MessageRepositorySimpleJDBCInsert messageRepositorySimpleJDBCInsert;
+
+    @Autowired
+    MessageRepositoryJDBCTemplate messageRepositoryJDBCTemplate;
+
+    final String MESSAGE_CONTENT = "Test";
+
+    @Test
+    public void insertJDBC_whenLoadMessageByKey_thenGetTheSameMessage() {
+        long key = messageRepositoryJDBCTemplate.insert(MESSAGE_CONTENT);
+        String loadedMessage = messageRepositoryJDBCTemplate.getMessageById(key);
+
+        assertEquals(MESSAGE_CONTENT, loadedMessage);
+
+    }
+
+    @Test
+    public void insertSimpleInsert_whenLoadMessageKey_thenGetTheSameMessage() {
+        long key = messageRepositorySimpleJDBCInsert.insert(MESSAGE_CONTENT);
+        String loadedMessage = messageRepositoryJDBCTemplate.getMessageById(key);
+
+        assertEquals(MESSAGE_CONTENT, loadedMessage);
+    }
+
+}

persistence-modules/spring-jpa/src/test/java/com/baeldung/manytomany/ManyToManyIntegrationTest.java

@@ -0,0 +1,24 @@
+package com.baeldung.manytomany;
+
+import javax.persistence.EntityManager;
+import javax.persistence.PersistenceContext;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@ContextConfiguration(classes = ManyToManyTestConfiguration.class)
+@DirtiesContext
+public class ManyToManyIntegrationTest {
+
+    @PersistenceContext
+    EntityManager entityManager;
+
+    @Test
+    public void contextStarted() {
+    }
+
+}

persistence-modules/spring-jpa/src/test/java/com/baeldung/manytomany/ManyToManyTestConfiguration.java

@@ -0,0 +1,51 @@
+package com.baeldung.manytomany;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.sql.DataSource;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.PropertySource;
+import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseBuilder;
+import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType;
+import org.springframework.orm.jpa.JpaVendorAdapter;
+import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
+import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
+
+@Configuration
+@PropertySource("classpath:/manytomany/test.properties")
+public class ManyToManyTestConfiguration {
+
+    @Bean
+    public DataSource dataSource() {
+        EmbeddedDatabaseBuilder dbBuilder = new EmbeddedDatabaseBuilder();
+        return dbBuilder.setType(EmbeddedDatabaseType.H2)
+            .addScript("classpath:/manytomany/db.sql")
+            .build();
+    }
+
+    @Bean
+    public LocalContainerEntityManagerFactoryBean entityManagerFactory(@Value("${hibernate.hbm2ddl.auto}") String hbm2ddlType, @Value("${hibernate.dialect}") String dialect, @Value("${hibernate.show_sql}") boolean showSql) {
+        LocalContainerEntityManagerFactoryBean result = new LocalContainerEntityManagerFactoryBean();
+
+        result.setDataSource(dataSource());
+        result.setPackagesToScan("com.baeldung.manytomany.model");
+        result.setJpaVendorAdapter(jpaVendorAdapter());
+
+        Map<String, Object> jpaProperties = new HashMap<>();
+        jpaProperties.put("hibernate.hbm2ddl.auto", hbm2ddlType);
+        jpaProperties.put("hibernate.dialect", dialect);
+        jpaProperties.put("hibernate.show_sql", showSql);
+        result.setJpaPropertyMap(jpaProperties);
+
+        return result;
+    }
+
+    public JpaVendorAdapter jpaVendorAdapter() {
+        return new HibernateJpaVendorAdapter();
+    }
+
+}

persistence-modules/spring-jpa/src/test/java/org/baeldung/dsrouting/DataSourceRoutingIntegrationTest.java

@@ -0,0 +1,55 @@
+package org.baeldung.dsrouting;
+
+import static org.junit.Assert.assertEquals;
+
+import javax.sql.DataSource;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@ContextConfiguration(classes = DataSourceRoutingTestConfiguration.class)
+@DirtiesContext
+public class DataSourceRoutingIntegrationTest {
+
+    @Autowired
+    DataSource routingDatasource;
+
+    @Autowired
+    ClientService clientService;
+
+    @Before
+    public void setup() {
+        final String SQL_CLIENT_A = "insert into client (id, name) values (1, 'CLIENT A')";
+        final String SQL_CLIENT_B = "insert into client (id, name) values (2, 'CLIENT B')";
+
+        JdbcTemplate jdbcTemplate = new JdbcTemplate();
+        jdbcTemplate.setDataSource(routingDatasource);
+
+        ClientDatabaseContextHolder.set(ClientDatabase.CLIENT_A);
+        jdbcTemplate.execute(SQL_CLIENT_A);
+        ClientDatabaseContextHolder.clear();
+
+        ClientDatabaseContextHolder.set(ClientDatabase.CLIENT_B);
+        jdbcTemplate.execute(SQL_CLIENT_B);
+        ClientDatabaseContextHolder.clear();
+    }
+
+    @Test
+    public void givenClientDbs_whenContextsSwitch_thenRouteToCorrectDatabase() throws Exception {
+
+        // test ACME WIDGETS
+        String clientName = clientService.getClientName(ClientDatabase.CLIENT_A);
+        assertEquals(clientName, "CLIENT A");
+
+        // test WIDGETS_ARE_US
+        clientName = clientService.getClientName(ClientDatabase.CLIENT_B);
+        assertEquals(clientName, "CLIENT B");
+    }
+}

persistence-modules/spring-jpa/src/test/java/org/baeldung/dsrouting/DataSourceRoutingTestConfiguration.java

@@ -0,0 +1,44 @@
+package org.baeldung.dsrouting;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.sql.DataSource;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseBuilder;
+import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType;
+
+@Configuration
+public class DataSourceRoutingTestConfiguration {
+
+    @Bean
+    public ClientService clientService() {
+        return new ClientService(new ClientDao(clientDatasource()));
+    }
+
+    @Bean
+    public DataSource clientDatasource() {
+        Map<Object, Object> targetDataSources = new HashMap<>();
+        DataSource clientADatasource = clientADatasource();
+        DataSource clientBDatasource = clientBDatasource();
+        targetDataSources.put(ClientDatabase.CLIENT_A, clientADatasource);
+        targetDataSources.put(ClientDatabase.CLIENT_B, clientBDatasource);
+
+        ClientDataSourceRouter clientRoutingDatasource = new ClientDataSourceRouter();
+        clientRoutingDatasource.setTargetDataSources(targetDataSources);
+        clientRoutingDatasource.setDefaultTargetDataSource(clientADatasource);
+        return clientRoutingDatasource;
+    }
+
+    private DataSource clientADatasource() {
+        EmbeddedDatabaseBuilder dbBuilder = new EmbeddedDatabaseBuilder();
+        return dbBuilder.setType(EmbeddedDatabaseType.H2).setName("CLIENT_A").addScript("classpath:dsrouting-db.sql").build();
+    }
+
+    private DataSource clientBDatasource() {
+        EmbeddedDatabaseBuilder dbBuilder = new EmbeddedDatabaseBuilder();
+        return dbBuilder.setType(EmbeddedDatabaseType.H2).setName("CLIENT_B").addScript("classpath:dsrouting-db.sql").build();
+    }
+}

persistence-modules/spring-jpa/src/test/java/org/baeldung/persistence/repository/AdvancedTaggingIntegrationTest.java

@@ -0,0 +1,83 @@
+package org.baeldung.persistence.repository;
+
+import org.baeldung.config.StudentJpaConfig;
+import org.baeldung.inmemory.persistence.dao.ManyStudentRepository;
+import org.baeldung.inmemory.persistence.dao.ManyTagRepository;
+import org.baeldung.inmemory.persistence.dao.StudentRepository;
+import org.baeldung.inmemory.persistence.model.KVTag;
+import org.baeldung.inmemory.persistence.model.ManyStudent;
+import org.baeldung.inmemory.persistence.model.ManyTag;
+import org.baeldung.inmemory.persistence.model.SkillTag;
+import org.baeldung.inmemory.persistence.model.Student;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+import org.springframework.transaction.annotation.Transactional;
+
+import javax.annotation.Resource;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+import static org.junit.Assert.assertEquals;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = { StudentJpaConfig.class }, loader = AnnotationConfigContextLoader.class)
+@Transactional
+@DirtiesContext
+public class AdvancedTaggingIntegrationTest {
+    @Resource
+    private StudentRepository studentRepository;
+
+    @Resource
+    private ManyStudentRepository manyStudentRepository;
+
+    @Resource
+    private ManyTagRepository manyTagRepository;
+
+    @Test
+    public void givenStudentWithSkillTags_whenSave_thenGetByNameAndSkillTag() {
+        Student student = new Student(1, "Will");
+        SkillTag skill1 = new SkillTag("java", 5);
+        student.setSkillTags(Arrays.asList(skill1));
+        studentRepository.save(student);
+
+        Student student2 = new Student(2, "Joe");
+        SkillTag skill2 = new SkillTag("java", 1);
+        student2.setSkillTags(Arrays.asList(skill2));
+        studentRepository.save(student2);
+
+        List<Student> students = studentRepository.retrieveByNameFilterByMinimumSkillTag("java", 3);
+        assertEquals("size incorrect", 1, students.size());
+    }
+
+    @Test
+    public void givenStudentWithKVTags_whenSave_thenGetByTagOk() {
+        Student student = new Student(0, "John");
+        student.setKVTags(Arrays.asList(new KVTag("department", "computer science")));
+        studentRepository.save(student);
+
+        Student student2 = new Student(1, "James");
+        student2.setKVTags(Arrays.asList(new KVTag("department", "humanities")));
+        studentRepository.save(student2);
+
+        List<Student> students = studentRepository.retrieveByKeyTag("department");
+        assertEquals("size incorrect", 2, students.size());
+    }
+
+    @Test
+    public void givenStudentWithManyTags_whenSave_theyGetByTagOk() {
+        ManyTag tag = new ManyTag("full time");
+        manyTagRepository.save(tag);
+
+        ManyStudent student = new ManyStudent("John");
+        student.setManyTags(Collections.singleton(tag));
+        manyStudentRepository.save(student);
+
+        List<ManyStudent> students = manyStudentRepository.findByManyTags_Name("full time");
+        assertEquals("size incorrect", 1, students.size());
+    }
+}

persistence-modules/spring-jpa/src/test/java/org/baeldung/persistence/repository/InMemoryDBIntegrationTest.java

@@ -0,0 +1,84 @@
+package org.baeldung.persistence.repository;
+
+import org.baeldung.config.StudentJpaConfig;
+import org.baeldung.inmemory.persistence.dao.StudentRepository;
+import org.baeldung.inmemory.persistence.model.Student;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+import org.springframework.transaction.annotation.Transactional;
+
+import javax.annotation.Resource;
+
+import java.util.Arrays;
+import java.util.List;
+
+import static org.junit.Assert.assertEquals;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = { StudentJpaConfig.class }, loader = AnnotationConfigContextLoader.class)
+@Transactional
+@DirtiesContext
+public class InMemoryDBIntegrationTest {
+
+    @Resource
+    private StudentRepository studentRepository;
+
+    private static final long ID = 1;
+    private static final String NAME = "john";
+
+    @Test
+    public void givenStudent_whenSave_thenGetOk() {
+        Student student = new Student(ID, NAME);
+        studentRepository.save(student);
+
+        Student student2 = studentRepository.findById(ID).get();
+        assertEquals("name incorrect", NAME, student2.getName());
+    }
+
+    @Test
+    public void givenStudentWithTags_whenSave_thenGetByTagOk() {
+        Student student = new Student(ID, NAME);
+        student.setTags(Arrays.asList("full time", "computer science"));
+        studentRepository.save(student);
+
+        Student student2 = studentRepository.retrieveByTag("full time").get(0);
+        assertEquals("name incorrect", NAME, student2.getName());
+    }
+
+    @Test
+    public void givenMultipleStudentsWithTags_whenSave_thenGetByTagReturnsCorrectCount() {
+        Student student = new Student(0, "Larry");
+        student.setTags(Arrays.asList("full time", "computer science"));
+        studentRepository.save(student);
+
+        Student student2 = new Student(1, "Curly");
+        student2.setTags(Arrays.asList("part time", "rocket science"));
+        studentRepository.save(student2);
+
+        Student student3 = new Student(2, "Moe");
+        student3.setTags(Arrays.asList("full time", "philosophy"));
+        studentRepository.save(student3);
+
+        Student student4 = new Student(3, "Shemp");
+        student4.setTags(Arrays.asList("part time", "mathematics"));
+        studentRepository.save(student4);
+
+        List<Student> students = studentRepository.retrieveByTag("full time");
+        assertEquals("size incorrect", 2, students.size());
+    }
+
+    @Test
+    public void givenStudentWithTags_whenSave_thenGetByNameAndTagOk() {
+        Student student = new Student(ID, NAME);
+        student.setTags(Arrays.asList("full time", "computer science"));
+        studentRepository.save(student);
+
+        Student student2 = studentRepository.retrieveByNameFilterByTag("John", "full time").get(0);
+        assertEquals("name incorrect", NAME, student2.getName());
+    }
+
+}

persistence-modules/spring-jpa/src/test/java/org/baeldung/persistence/service/FooPaginationPersistenceIntegrationTest.java

@@ -0,0 +1,157 @@
+package org.baeldung.persistence.service;
+
+import static org.apache.commons.lang3.RandomStringUtils.randomAlphabetic;
+import static org.hamcrest.Matchers.hasSize;
+import static org.hamcrest.Matchers.lessThan;
+import static org.junit.Assert.assertThat;
+
+import java.util.List;
+
+import javax.persistence.EntityManager;
+import javax.persistence.PersistenceContext;
+import javax.persistence.Query;
+import javax.persistence.TypedQuery;
+import javax.persistence.criteria.CriteriaBuilder;
+import javax.persistence.criteria.CriteriaQuery;
+import javax.persistence.criteria.Root;
+
+import org.baeldung.config.PersistenceJPAConfig;
+import org.baeldung.persistence.model.Foo;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = { PersistenceJPAConfig.class }, loader = AnnotationConfigContextLoader.class)
+@DirtiesContext
+public class FooPaginationPersistenceIntegrationTest {
+
+    @PersistenceContext
+    private EntityManager entityManager;
+
+    @Autowired
+    private FooService fooService;
+
+    @Before
+    public final void before() {
+        final int minimalNumberOfEntities = 25;
+        if (fooService.findAll().size() <= minimalNumberOfEntities) {
+            for (int i = 0; i < minimalNumberOfEntities; i++) {
+                fooService.create(new Foo(randomAlphabetic(6)));
+            }
+        }
+    }
+
+    // tests
+
+    @Test
+    public final void whenContextIsBootstrapped_thenNoExceptions() {
+        //
+    }
+
+    @SuppressWarnings("unchecked")
+    @Test
+    public final void givenEntitiesExist_whenRetrievingFirstPage_thenCorrect() {
+        final int pageSize = 10;
+
+        final Query query = entityManager.createQuery("From Foo");
+        configurePagination(query, 1, pageSize);
+
+        // When
+        final List<Foo> fooList = query.getResultList();
+
+        // Then
+        assertThat(fooList, hasSize(pageSize));
+    }
+
+    @SuppressWarnings("unchecked")
+    @Test
+    public final void givenEntitiesExist_whenRetrievingLastPage_thenCorrect() {
+        final int pageSize = 10;
+        final Query queryTotal = entityManager.createQuery("Select count(f.id) from Foo f");
+        final long countResult = (long) queryTotal.getSingleResult();
+
+        final Query query = entityManager.createQuery("Select f from Foo as f order by f.id");
+        final int lastPage = (int) ((countResult / pageSize) + 1);
+        configurePagination(query, lastPage, pageSize);
+        final List<Foo> fooList = query.getResultList();
+
+        // Then
+        assertThat(fooList, hasSize(lessThan(pageSize + 1)));
+    }
+
+    @SuppressWarnings("unchecked")
+    @Test
+    public final void givenEntitiesExist_whenRetrievingPage_thenCorrect() {
+        final int pageSize = 10;
+
+        final Query queryIds = entityManager.createQuery("Select f.id from Foo f order by f.name");
+        final List<Integer> fooIds = queryIds.getResultList();
+
+        final Query query = entityManager.createQuery("Select f from Foo as f where f.id in :ids");
+        query.setParameter("ids", fooIds.subList(0, pageSize));
+
+        final List<Foo> fooList = query.getResultList();
+
+        // Then
+        assertThat(fooList, hasSize(pageSize));
+    }
+
+    @Test
+    public final void givenEntitiesExist_whenRetrievingPageViaCriteria_thenCorrect() {
+        final int pageSize = 10;
+        final CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
+        final CriteriaQuery<Foo> criteriaQuery = criteriaBuilder.createQuery(Foo.class);
+        final Root<Foo> from = criteriaQuery.from(Foo.class);
+        final CriteriaQuery<Foo> select = criteriaQuery.select(from);
+        final TypedQuery<Foo> typedQuery = entityManager.createQuery(select);
+        typedQuery.setFirstResult(0);
+        typedQuery.setMaxResults(pageSize);
+        final List<Foo> fooList = typedQuery.getResultList();
+
+        // Then
+        assertThat(fooList, hasSize(pageSize));
+    }
+
+    @Test
+    public final void givenEntitiesExist_whenRetrievingPageViaCriteria_thenNoExceptions() {
+        int pageNumber = 1;
+        final int pageSize = 10;
+        final CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
+
+        final CriteriaQuery<Long> countQuery = criteriaBuilder.createQuery(Long.class);
+        countQuery.select(criteriaBuilder.count(countQuery.from(Foo.class)));
+        final Long count = entityManager.createQuery(countQuery).getSingleResult();
+
+        final CriteriaQuery<Foo> criteriaQuery = criteriaBuilder.createQuery(Foo.class);
+        final Root<Foo> from = criteriaQuery.from(Foo.class);
+        final CriteriaQuery<Foo> select = criteriaQuery.select(from);
+
+        TypedQuery<Foo> typedQuery;
+        while (pageNumber < count.intValue()) {
+            typedQuery = entityManager.createQuery(select);
+            typedQuery.setFirstResult(pageNumber - 1);
+            typedQuery.setMaxResults(pageSize);
+            System.out.println("Current page: " + typedQuery.getResultList());
+            pageNumber += pageSize;
+        }
+
+    }
+
+    // UTIL
+
+    final int determineLastPage(final int pageSize, final long countResult) {
+        return (int) (countResult / pageSize) + 1;
+    }
+
+    final void configurePagination(final Query query, final int pageNumber, final int pageSize) {
+        query.setFirstResult((pageNumber - 1) * pageSize);
+        query.setMaxResults(pageSize);
+    }
+
+}

persistence-modules/spring-jpa/src/test/java/org/baeldung/persistence/service/FooServicePersistenceIntegrationTest.java

@@ -0,0 +1,69 @@
+package org.baeldung.persistence.service;
+
+import static org.apache.commons.lang3.RandomStringUtils.randomAlphabetic;
+
+import org.baeldung.config.PersistenceJPAConfig;
+import org.baeldung.persistence.model.Foo;
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.dao.DataAccessException;
+import org.springframework.dao.DataIntegrityViolationException;
+import org.springframework.dao.InvalidDataAccessApiUsageException;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = { PersistenceJPAConfig.class }, loader = AnnotationConfigContextLoader.class)
+@DirtiesContext
+public class FooServicePersistenceIntegrationTest {
+
+    @Autowired
+    private FooService service;
+
+    // tests
+
+    @Test
+    public final void whenContextIsBootstrapped_thenNoExceptions() {
+        //
+    }
+
+    @Test
+    public final void whenEntityIsCreated_thenNoExceptions() {
+        service.create(new Foo(randomAlphabetic(6)));
+    }
+
+    @Test(expected = DataIntegrityViolationException.class)
+    public final void whenInvalidEntityIsCreated_thenDataException() {
+        service.create(new Foo(randomAlphabetic(2048)));
+    }
+
+    @Test(expected = DataIntegrityViolationException.class)
+    public final void whenEntityWithLongNameIsCreated_thenDataException() {
+        service.create(new Foo(randomAlphabetic(2048)));
+    }
+
+    @Test(expected = InvalidDataAccessApiUsageException.class)
+    public final void whenSameEntityIsCreatedTwice_thenDataException() {
+        final Foo entity = new Foo(randomAlphabetic(8));
+        service.create(entity);
+        service.create(entity);
+    }
+
+    @Test(expected = DataAccessException.class)
+    public final void temp_whenInvalidEntityIsCreated_thenDataException() {
+        service.create(new Foo(randomAlphabetic(2048)));
+    }
+
+    @Test
+    public final void whenEntityIsCreated_thenFound() {
+        final Foo fooEntity = new Foo("abc");
+        service.create(fooEntity);
+        final Foo found = service.findOne(fooEntity.getId());
+        Assert.assertNotNull(found);
+    }
+
+}

persistence-modules/spring-jpa/src/test/java/org/baeldung/persistence/service/FooServiceSortingIntegrationTest.java

@@ -0,0 +1,118 @@
+package org.baeldung.persistence.service;
+
+import java.util.List;
+
+import javax.persistence.EntityManager;
+import javax.persistence.PersistenceContext;
+import javax.persistence.Query;
+import javax.persistence.TypedQuery;
+import javax.persistence.criteria.CriteriaBuilder;
+import javax.persistence.criteria.CriteriaQuery;
+import javax.persistence.criteria.Root;
+
+import org.baeldung.config.PersistenceJPAConfig;
+import org.baeldung.persistence.model.Bar;
+import org.baeldung.persistence.model.Foo;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = { PersistenceJPAConfig.class }, loader = AnnotationConfigContextLoader.class)
+@DirtiesContext
+@SuppressWarnings("unchecked")
+public class FooServiceSortingIntegrationTest {
+
+    @PersistenceContext
+    private EntityManager entityManager;
+
+    // tests
+
+    @Test
+    public final void whenSortingByOneAttributeDefaultOrder_thenPrintSortedResult() {
+        final String jql = "Select f from Foo as f order by f.id";
+        final Query sortQuery = entityManager.createQuery(jql);
+        final List<Foo> fooList = sortQuery.getResultList();
+        for (final Foo foo : fooList) {
+            System.out.println("Name:" + foo.getName() + "-------Id:" + foo.getId());
+        }
+    }
+
+    @Test
+    public final void whenSortingByOneAttributeSetOrder_thenSortedPrintResult() {
+        final String jql = "Select f from Foo as f order by f.id desc";
+        final Query sortQuery = entityManager.createQuery(jql);
+        final List<Foo> fooList = sortQuery.getResultList();
+        for (final Foo foo : fooList) {
+            System.out.println("Name:" + foo.getName() + "-------Id:" + foo.getId());
+        }
+    }
+
+    @Test
+    public final void whenSortingByTwoAttributes_thenPrintSortedResult() {
+        final String jql = "Select f from Foo as f order by f.name asc, f.id desc";
+        final Query sortQuery = entityManager.createQuery(jql);
+        final List<Foo> fooList = sortQuery.getResultList();
+        for (final Foo foo : fooList) {
+            System.out.println("Name:" + foo.getName() + "-------Id:" + foo.getId());
+        }
+    }
+
+    @Test
+    public final void whenSortingFooByBar_thenBarsSorted() {
+        final String jql = "Select f from Foo as f order by f.name, f.bar.id";
+        final Query barJoinQuery = entityManager.createQuery(jql);
+        final List<Foo> fooList = barJoinQuery.getResultList();
+        for (final Foo foo : fooList) {
+            System.out.println("Name:" + foo.getName());
+            if (foo.getBar() != null) {
+                System.out.print("-------BarId:" + foo.getBar().getId());
+            }
+        }
+    }
+
+    @Test
+    public final void whenSortinfBar_thenPrintBarsSortedWithFoos() {
+        final String jql = "Select b from Bar as b order by b.id";
+        final Query barQuery = entityManager.createQuery(jql);
+        final List<Bar> barList = barQuery.getResultList();
+        for (final Bar bar : barList) {
+            System.out.println("Bar Id:" + bar.getId());
+            for (final Foo foo : bar.getFooList()) {
+                System.out.println("FooName:" + foo.getName());
+            }
+        }
+    }
+
+    @Test
+    public final void whenSortingFooWithCriteria_thenPrintSortedFoos() {
+        final CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
+        final CriteriaQuery<Foo> criteriaQuery = criteriaBuilder.createQuery(Foo.class);
+        final Root<Foo> from = criteriaQuery.from(Foo.class);
+        final CriteriaQuery<Foo> select = criteriaQuery.select(from);
+        criteriaQuery.orderBy(criteriaBuilder.asc(from.get("name")));
+        final TypedQuery<Foo> typedQuery = entityManager.createQuery(select);
+        final List<Foo> fooList = typedQuery.getResultList();
+        for (final Foo foo : fooList) {
+            System.out.println("Name:" + foo.getName() + "--------Id:" + foo.getId());
+        }
+    }
+
+    @Test
+    public final void whenSortingFooWithCriteriaAndMultipleAttributes_thenPrintSortedFoos() {
+        final CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
+        final CriteriaQuery<Foo> criteriaQuery = criteriaBuilder.createQuery(Foo.class);
+        final Root<Foo> from = criteriaQuery.from(Foo.class);
+        final CriteriaQuery<Foo> select = criteriaQuery.select(from);
+        criteriaQuery.orderBy(criteriaBuilder.asc(from.get("name")), criteriaBuilder.desc(from.get("id")));
+        final TypedQuery<Foo> typedQuery = entityManager.createQuery(select);
+        final List<Foo> fooList = typedQuery.getResultList();
+        for (final Foo foo : fooList) {
+            System.out.println("Name:" + foo.getName() + "-------Id:" + foo.getId());
+        }
+    }
+
+}

persistence-modules/spring-jpa/src/test/java/org/baeldung/persistence/service/FooServiceSortingWitNullsManualIntegrationTest.java

@@ -0,0 +1,64 @@
+package org.baeldung.persistence.service;
+
+import static org.apache.commons.lang3.RandomStringUtils.randomAlphabetic;
+import static org.junit.Assert.assertNull;
+
+import java.util.List;
+
+import javax.persistence.EntityManager;
+import javax.persistence.PersistenceContext;
+import javax.persistence.Query;
+
+import org.baeldung.config.PersistenceJPAConfig;
+import org.baeldung.persistence.model.Foo;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = { PersistenceJPAConfig.class }, loader = AnnotationConfigContextLoader.class)
+@DirtiesContext
+public class FooServiceSortingWitNullsManualIntegrationTest {
+
+    @PersistenceContext
+    private EntityManager entityManager;
+
+    @Autowired
+    private FooService service;
+
+    // tests
+
+    @SuppressWarnings("unchecked")
+    @Test
+    public final void whenSortingByStringNullLast_thenLastNull() {
+        service.create(new Foo());
+        service.create(new Foo(randomAlphabetic(6)));
+
+        final String jql = "Select f from Foo as f order by f.name desc NULLS LAST";
+        final Query sortQuery = entityManager.createQuery(jql);
+        final List<Foo> fooList = sortQuery.getResultList();
+        assertNull(fooList.get(fooList.toArray().length - 1).getName());
+        for (final Foo foo : fooList) {
+            System.out.println("Name:" + foo.getName());
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    @Test
+    public final void whenSortingByStringNullFirst_thenFirstNull() {
+        service.create(new Foo());
+
+        final String jql = "Select f from Foo as f order by f.name desc NULLS FIRST";
+        final Query sortQuery = entityManager.createQuery(jql);
+        final List<Foo> fooList = sortQuery.getResultList();
+        assertNull(fooList.get(0).getName());
+        for (final Foo foo : fooList) {
+            System.out.println("Name:" + foo.getName());
+        }
+    }
+
+}

persistence-modules/spring-jpa/src/test/java/org/baeldung/persistence/service/PersistenceTestSuite.java

@@ -0,0 +1,15 @@
+package org.baeldung.persistence.service;
+
+import org.junit.runner.RunWith;
+import org.junit.runners.Suite;
+
+@RunWith(Suite.class)
+@Suite.SuiteClasses({ // @formatter:off
+    FooPaginationPersistenceIntegrationTest.class
+    ,FooServicePersistenceIntegrationTest.class
+    ,FooServiceSortingIntegrationTest.class
+    ,FooServiceSortingWitNullsManualIntegrationTest.class
+}) // @formatter:on
+public class PersistenceTestSuite {
+    //
+}

persistence-modules/spring-jpa/src/test/resources/.gitignore

@@ -0,0 +1,13 @@
+*.class
+
+#folders#
+/target
+/neoDb*
+/data
+/src/main/webapp/WEB-INF/classes
+*/META-INF/*
+
+# Packaged files #
+*.jar
+*.war
+*.ear

persistence-modules/spring-jpa/src/test/resources/dsrouting-db.sql

@@ -0,0 +1,5 @@
+create table client (
+  id numeric,
+  name  varchar(50),
+  constraint pk_client primary key (id)
+);

persistence-modules/spring-jpa/src/test/resources/manytomany/db.sql

@@ -0,0 +1,44 @@
+CREATE TABLE course (
+  id bigint(20) NOT NULL,
+  PRIMARY KEY (id)
+);
+
+
+CREATE TABLE student (
+  id bigint(20) NOT NULL,
+  PRIMARY KEY (id)
+);
+
+
+CREATE TABLE course_like (
+  student_id bigint(20) NOT NULL,
+  course_id bigint(20) NOT NULL,
+  PRIMARY KEY (student_id, course_id),
+  CONSTRAINT fk_course_like__student FOREIGN KEY (student_id) REFERENCES student (id),
+  CONSTRAINT fk_course_like__course FOREIGN KEY (course_id) REFERENCES course (id)
+);
+
+
+
+CREATE TABLE course_rating (
+  course_id bigint(20) NOT NULL,
+  student_id bigint(20) NOT NULL,
+  rating int(11) NOT NULL,
+  PRIMARY KEY (course_id, student_id),
+  CONSTRAINT fk_course_rating__student FOREIGN KEY (student_id) REFERENCES student (id),
+  CONSTRAINT fk_course_rating__course FOREIGN KEY (course_id) REFERENCES course (id)
+);
+
+
+
+CREATE TABLE course_registration (
+  id bigint(20) NOT NULL,
+  grade int(11),
+  registered_at datetime NOT NULL,
+  course_id bigint(20) NOT NULL,
+  student_id bigint(20) NOT NULL,
+  PRIMARY KEY (id),
+  CONSTRAINT fk_course_registration__student FOREIGN KEY (student_id) REFERENCES student (id),
+  CONSTRAINT fk_course_registration__course FOREIGN KEY (course_id) REFERENCES course (id)
+);
+

persistence-modules/spring-jpa/src/test/resources/manytomany/test.properties

@@ -0,0 +1,6 @@
+jdbc.driverClassName=org.h2.Driver
+jdbc.url=jdbc:h2:mem:myDb;DB_CLOSE_DELAY=-1
+
+hibernate.dialect=org.hibernate.dialect.H2Dialect
+hibernate.show_sql=true
+hibernate.hbm2ddl.auto=validate

persistence-modules/spring-jpa/src/test/resources/persistence-student.properties

@@ -0,0 +1,9 @@
+jdbc.driverClassName=org.h2.Driver
+jdbc.url=jdbc:h2:mem:myDb;DB_CLOSE_DELAY=-1
+
+hibernate.dialect=org.hibernate.dialect.H2Dialect
+hibernate.show_sql=true
+hibernate.hbm2ddl.auto=create
+
+hibernate.cache.use_second_level_cache=false
+hibernate.cache.use_query_cache=false