Fix typo

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/boot/Application.java

@@ -0,0 +1,14 @@
+package com.baeldung.boot;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.ApplicationContext;
+
+@SpringBootApplication
+public class Application {
+    private static ApplicationContext applicationContext;
+
+    public static void main(String[] args) {
+        applicationContext = SpringApplication.run(Application.class, args);
+    }
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/boot/config/H2JpaConfig.java

@@ -0,0 +1,73 @@
+package com.baeldung.boot.config;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Profile;
+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;
+
+import javax.persistence.EntityManagerFactory;
+import javax.sql.DataSource;
+import java.util.Properties;
+
+@Configuration
+@EnableJpaRepositories(basePackages = { "com.baeldung.boot.repository", "com.baeldung.repository" })
+@PropertySource("classpath:persistence-generic-entity.properties")
+//@PropertySource("classpath:persistence-derby.properties")
+//@PropertySource("classpath:persistence-hsqldb.properties")
+//@PropertySource("classpath:persistence-sqlite.properties")
+@EnableTransactionManagement
+@Profile("default") //only required to allow H2JpaConfig and H2TestProfileJPAConfig to coexist in same project
+                    //this demo project is showcasing several ways to achieve the same end, and class-level
+                    //Profile annotations are only necessary because the different techniques are sharing a project
+public class H2JpaConfig {
+
+    @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[] { "com.baeldung.boot.domain" });
+        em.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
+        em.setJpaProperties(additionalProperties());
+        return em;
+    }
+
+    @Bean
+    JpaTransactionManager transactionManager(final EntityManagerFactory entityManagerFactory) {
+        final 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"));
+
+        return hibernateProperties;
+    }
+
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/boot/domain/Car.java

@@ -0,0 +1,48 @@
+package com.baeldung.boot.domain;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+
+/**
+ * @author paullatzelsperger
+ * @since 2019-03-20
+ */
+@Entity
+public class Car {
+
+    @Id
+    @GeneratedValue
+    private int id;
+    private Integer power;
+    private String model;
+
+    public Car() {
+
+    }
+
+    public Car(int power, String model) {
+        this.power = power;
+        this.model = model;
+    }
+
+    public Integer getPower() {
+        return power;
+    }
+
+    public void setPower(Integer power) {
+        this.power = power;
+    }
+
+    public String getModel() {
+        return model;
+    }
+
+    public void setModel(String model) {
+        this.model = model;
+    }
+
+    public int getId() {
+        return id;
+    }
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/boot/domain/Country.java

@@ -0,0 +1,36 @@
+package com.baeldung.boot.domain;
+
+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-boot-persistence/src/main/java/com/baeldung/boot/domain/Employee.java

@@ -0,0 +1,50 @@
+package com.baeldung.boot.domain;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import javax.persistence.Table;
+
+/**
+ * @author harshavs
+ * @since 2019-08-01
+ */
+@Entity
+@Table(name = "employees")
+public class Employee {
+
+    @Id
+    @GeneratedValue
+    private int id;
+    private String name;
+    private String title;
+
+    public Employee() {
+
+    }
+
+    public Employee(String name, String title) {
+        this.name = name;
+        this.title = title;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public int getId() {
+        return id;
+    }
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/boot/domain/GenericEntity.java

@@ -0,0 +1,42 @@
+package com.baeldung.boot.domain;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+
+@Entity
+public class GenericEntity {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private Long id;
+    private String value;
+
+    public GenericEntity() {
+    }
+
+    public GenericEntity(String value) {
+        this.value = value;
+    }
+
+    public GenericEntity(Long id, String value) {
+        this.id = id;
+        this.value = value;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getValue() {
+        return value;
+    }
+
+    public void setValue(String value) {
+        this.value = value;
+    }
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/boot/domain/User.java

@@ -0,0 +1,49 @@
+package com.baeldung.boot.domain;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import javax.persistence.Table;
+
+@Entity
+@Table(name = "users")
+public class User {
+
+    @Id
+    @GeneratedValue
+    private Integer id;
+    private String name;
+    private Integer status;
+
+    public User() {
+    }
+
+    public User(String name, Integer status) {
+        this.name = name;
+        this.status = status;
+    }
+
+    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;
+    }
+
+    public Integer getStatus() {
+        return status;
+    }
+
+    public void setStatus(Integer status) {
+        this.status = status;
+    }
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/boot/naming/HibernateConfig.java

@@ -0,0 +1,19 @@
+package com.baeldung.boot.naming;
+
+import org.hibernate.jpa.boot.spi.IntegratorProvider;
+import org.springframework.boot.autoconfigure.orm.jpa.HibernatePropertiesCustomizer;
+
+import java.util.Collections;
+import java.util.Map;
+
+/**
+ * Custom implementation of the {@link HibernatePropertiesCustomizer HibernatePropertiesCustomizer}.
+ * We can use it to set custom hibernate properties.
+ */
+public class HibernateConfig implements HibernatePropertiesCustomizer {
+
+    @Override
+    public void customize(Map<String, Object> hibernateProperties) {
+        hibernateProperties.put("hibernate.integrator_provider", (IntegratorProvider) () -> Collections.singletonList(MetadataExtractorIntegrator.INSTANCE));
+    }
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/boot/naming/MetadataExtractorIntegrator.java

@@ -0,0 +1,41 @@
+package com.baeldung.boot.naming;
+
+import org.hibernate.boot.Metadata;
+import org.hibernate.boot.model.relational.Database;
+import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.integrator.spi.Integrator;
+import org.hibernate.service.spi.SessionFactoryServiceRegistry;
+
+/**
+ * Custom implementation of the {@link Integrator Integrator} interface.
+ * We can use it to getting access to the binding metadata between entity mappings and database tables.
+ */
+public class MetadataExtractorIntegrator implements Integrator {
+
+    public static final MetadataExtractorIntegrator INSTANCE = new MetadataExtractorIntegrator();
+
+    private Database database;
+
+    private Metadata metadata;
+
+    public Database getDatabase() {
+        return database;
+    }
+
+    public Metadata getMetadata() {
+        return metadata;
+    }
+
+    @Override
+    public void integrate(Metadata metadata, SessionFactoryImplementor sessionFactory, SessionFactoryServiceRegistry serviceRegistry) {
+
+        this.database = metadata.getDatabase();
+        this.metadata = metadata;
+
+    }
+
+    @Override
+    public void disintegrate(SessionFactoryImplementor sessionFactory, SessionFactoryServiceRegistry serviceRegistry) {
+
+    }
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/boot/naming/entity/Account.java

@@ -0,0 +1,19 @@
+package com.baeldung.boot.naming.entity;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.OneToMany;
+import java.util.List;
+
+@Entity
+public class Account {
+
+    @Id private Long id;
+
+    private String defaultEmail;
+
+    @OneToMany List<Preference> preferences;
+
+    @Column(name = "\"Secondary_Email\"") private String secondaryEmail;
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/boot/naming/entity/Preference.java

@@ -0,0 +1,16 @@
+package com.baeldung.boot.naming.entity;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.ManyToOne;
+
+@Entity
+public class Preference {
+
+    @Id private Long id;
+
+    private String name;
+
+    @ManyToOne private Account account;
+
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/boot/repository/CarRepository.java

@@ -0,0 +1,26 @@
+package com.baeldung.boot.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+import org.springframework.stereotype.Repository;
+
+import com.baeldung.boot.domain.Car;
+
+/**
+ * @author paullatzelsperger
+ * @since 2019-03-20
+ */
+@Repository
+public interface CarRepository extends JpaRepository<Car, Integer> {
+
+    boolean existsCarByPower(int power);
+
+    boolean existsCarByModel(String model);
+
+    @Query("select case when count(c)> 0 then true else false end from Car c where c.model = :model")
+    boolean existsCarExactCustomQuery(@Param("model") String model);
+
+    @Query("select case when count(c)> 0 then true else false end from Car c where lower(c.model) like lower(:model)")
+    boolean existsCarLikeCustomQuery(@Param("model") String model);
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/boot/repository/EmployeeRepository.java

@@ -0,0 +1,15 @@
+package com.baeldung.boot.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import com.baeldung.boot.domain.Employee;
+
+/**
+ * @author harshavs
+ * @since 2019-08-01
+ */
+@Repository
+public interface EmployeeRepository extends JpaRepository<Employee, Integer> {
+
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/boot/repository/GenericEntityRepository.java

@@ -0,0 +1,8 @@
+package com.baeldung.boot.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import com.baeldung.boot.domain.GenericEntity;
+
+public interface GenericEntityRepository extends JpaRepository<GenericEntity, Long> {
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/boot/repository/UserRepository.java

@@ -0,0 +1,83 @@
+package com.baeldung.boot.repository;
+
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
+import org.springframework.data.domain.Sort;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Modifying;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+import org.springframework.scheduling.annotation.Async;
+import org.springframework.stereotype.Repository;
+
+import com.baeldung.boot.domain.User;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.Optional;
+import java.util.concurrent.CompletableFuture;
+import java.util.stream.Stream;
+
+@Repository("userRepository")
+public interface UserRepository extends JpaRepository<User, Integer> {
+
+    int countByStatus(int status);
+
+    Optional<User> findOneByName(String name);
+
+    Stream<User> findAllByName(String name);
+
+    @Async
+    CompletableFuture<User> findOneByStatus(Integer status);
+
+    @Query("SELECT u FROM User u WHERE u.status = 1")
+    Collection<User> findAllActiveUsers();
+
+    @Query(value = "SELECT * FROM USERS u WHERE u.status = 1", nativeQuery = true)
+    Collection<User> findAllActiveUsersNative();
+
+    @Query("SELECT u FROM User u WHERE u.status = ?1")
+    User findUserByStatus(Integer status);
+
+    @Query(value = "SELECT * FROM Users u WHERE u.status = ?1", nativeQuery = true)
+    User findUserByStatusNative(Integer status);
+
+    @Query("SELECT u FROM User u WHERE u.status = ?1 and u.name = ?2")
+    User findUserByStatusAndName(Integer status, String name);
+
+    @Query("SELECT u FROM User u WHERE u.status = :status and u.name = :name")
+    User findUserByStatusAndNameNamedParams(@Param("status") Integer status, @Param("name") String name);
+
+    @Query(value = "SELECT * FROM Users u WHERE u.status = :status AND u.name = :name", nativeQuery = true)
+    User findUserByStatusAndNameNamedParamsNative(@Param("status") Integer status, @Param("name") String name);
+
+    @Query("SELECT u FROM User u WHERE u.status = :status and u.name = :name")
+    User findUserByUserStatusAndUserName(@Param("status") Integer userStatus, @Param("name") String userName);
+
+    @Query("SELECT u FROM User u WHERE u.name like ?1%")
+    User findUserByNameLike(String name);
+
+    @Query("SELECT u FROM User u WHERE u.name like :name%")
+    User findUserByNameLikeNamedParam(@Param("name") String name);
+
+    @Query(value = "SELECT * FROM users u WHERE u.name LIKE ?1%", nativeQuery = true)
+    User findUserByNameLikeNative(String name);
+
+    @Query(value = "SELECT u FROM User u")
+    List<User> findAllUsers(Sort sort);
+
+    @Query(value = "SELECT u FROM User u ORDER BY id")
+    Page<User> findAllUsersWithPagination(Pageable pageable);
+
+    @Query(value = "SELECT * FROM Users ORDER BY id \n-- #pageable\n", countQuery = "SELECT count(*) FROM Users", nativeQuery = true)
+    Page<User> findAllUsersWithPaginationNative(Pageable pageable);
+
+    @Modifying
+    @Query("update User u set u.status = :status where u.name = :name")
+    int updateUserSetStatusForName(@Param("status") Integer status, @Param("name") String name);
+
+    @Modifying
+    @Query(value = "UPDATE Users u SET u.status = ? WHERE u.name = ?", nativeQuery = true)
+    int updateUserSetStatusForNameNative(Integer status, String name);
+
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/disabledatasource/application/Application.java

@@ -0,0 +1,13 @@
+package com.baeldung.disabledatasource.application;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
+
+@SpringBootApplication(exclude=DataSourceAutoConfiguration.class)
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/persistencecontext/PersistenceContextDemoApplication.java

@@ -0,0 +1,13 @@
+package com.baeldung.persistencecontext;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.ComponentScan;
+
+@SpringBootApplication
+@ComponentScan(basePackages="com.baeldung.persistencecontext")
+public class PersistenceContextDemoApplication {
+    public static void main(String[] args) {
+        SpringApplication.run(PersistenceContextDemoApplication.class, args);
+    }
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/persistencecontext/controller/UserController.java

@@ -0,0 +1,51 @@
+package com.baeldung.persistencecontext.controller;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.baeldung.persistencecontext.entity.User;
+import com.baeldung.persistencecontext.service.ExtendedPersistenceContextUserService;
+import com.baeldung.persistencecontext.service.TransctionPersistenceContextUserService;
+
+@RestController
+public class UserController{
+
+    @Autowired
+    private TransctionPersistenceContextUserService transctionPersistenceContextUserService;
+    @Autowired
+    private ExtendedPersistenceContextUserService extendedPersistenceContextUserService;
+
+    @RequestMapping(value = "v1/user", method = RequestMethod.POST, consumes = "application/json", produces = "application/json")
+    public User saveUserV1(@RequestBody User user) {
+        return transctionPersistenceContextUserService.insertWithTransaction(user);
+    }
+
+    @RequestMapping(value = "v2/user", method = RequestMethod.POST, consumes = "application/json", produces = "application/json")
+    public User saveUserV2(@RequestBody User user) {
+        return extendedPersistenceContextUserService.insertWithoutTransaction(user);
+    }
+    
+    @RequestMapping(value = "v3/user", method = RequestMethod.POST, consumes = "application/json", produces = "application/json")
+    public User saveUserV3(@RequestBody User user) {
+        return extendedPersistenceContextUserService.insertWithTransaction(user);
+    }
+    
+    @RequestMapping(value = "v4/user", method = RequestMethod.POST, consumes = "application/json", produces = "application/json")
+    public User saveUserV4(@RequestBody User user) {
+        return transctionPersistenceContextUserService.insertWithoutTransaction(user);
+    }
+
+    @RequestMapping(value = "v1/user/{id}", method = RequestMethod.GET, produces = "application/json")
+    public User getUserV1(@PathVariable("id") Long id) {
+        return transctionPersistenceContextUserService.find(id);
+    }
+
+    @RequestMapping(value = "v2/user/{id}", method = RequestMethod.GET, produces = "application/json")
+    public User getUserV2(@PathVariable("id") Long id) {
+        return extendedPersistenceContextUserService.find(id);
+    }
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/persistencecontext/entity/User.java

@@ -0,0 +1,36 @@
+package com.baeldung.persistencecontext.entity;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+
+@Entity
+public class User {
+
+    @Id
+    private Long id;
+    private String name;
+    private String role;
+
+    public User() {
+
+    }
+
+    public User(Long id, String name, String role) {
+        this.id = id;
+        this.name = name;
+        this.role = role;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getRole() {
+        return role;
+    }
+
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/persistencecontext/service/ExtendedPersistenceContextUserService.java

@@ -0,0 +1,37 @@
+package com.baeldung.persistencecontext.service;
+
+import javax.persistence.EntityManager;
+import javax.persistence.PersistenceContext;
+import javax.persistence.PersistenceContextType;
+import javax.transaction.Transactional;
+
+import org.springframework.stereotype.Component;
+
+import com.baeldung.persistencecontext.entity.User;
+
+@Component
+public class ExtendedPersistenceContextUserService {
+
+    @PersistenceContext(type = PersistenceContextType.EXTENDED)
+    private EntityManager entityManager;
+
+    public EntityManager getEntityManager() {
+        return entityManager;
+    }
+    
+    @Transactional
+    public User insertWithTransaction(User user) {
+        entityManager.persist(user);
+        return user;
+    }
+
+    public User insertWithoutTransaction(User user) {
+        entityManager.persist(user);
+        return user;
+    }
+
+    public User find(long id) {
+        User user = entityManager.find(User.class, id);
+        return user;
+    }
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/persistencecontext/service/TransctionPersistenceContextUserService.java

@@ -0,0 +1,36 @@
+package com.baeldung.persistencecontext.service;
+
+
+import javax.persistence.EntityManager;
+import javax.persistence.PersistenceContext;
+import javax.transaction.Transactional;
+
+import org.springframework.stereotype.Component;
+
+import com.baeldung.persistencecontext.entity.User;
+
+@Component
+public class TransctionPersistenceContextUserService {
+
+    @PersistenceContext
+    private EntityManager entityManager;
+    
+    public EntityManager getEntityManager() {
+        return entityManager;
+    }
+
+    @Transactional
+    public User insertWithTransaction(User user) {
+        entityManager.persist(user);
+        return user;
+    }
+    
+    public User insertWithoutTransaction(User user) {
+        entityManager.persist(user);
+        return user;
+    }
+    
+    public User find(long id) {
+        return entityManager.find(User.class, id);
+    }
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/springbootcrudapp/application/Application.java

@@ -0,0 +1,22 @@
+package com.baeldung.springbootcrudapp.application;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.autoconfigure.domain.EntityScan;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
+import org.springframework.transaction.annotation.EnableTransactionManagement;
+
+@SpringBootApplication 
+@EnableAutoConfiguration
+@ComponentScan(basePackages={"com.baeldung.springbootcrudapp.application"})
+@EnableJpaRepositories(basePackages="com.baeldung.springbootcrudapp.application.repositories")
+@EnableTransactionManagement
+@EntityScan(basePackages="com.baeldung.springbootcrudapp.application.entities")
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/springbootcrudapp/application/controllers/UserController.java

@@ -0,0 +1,66 @@
+package com.baeldung.springbootcrudapp.application.controllers;
+
+import com.baeldung.springbootcrudapp.application.repositories.UserRepository;
+import com.baeldung.springbootcrudapp.application.entities.User;
+import javax.validation.Valid;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.validation.BindingResult;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+
+@Controller
+public class UserController {
+    
+    private final UserRepository userRepository;
+
+    @Autowired
+    public UserController(UserRepository userRepository) {
+        this.userRepository = userRepository;
+    }
+    
+    @GetMapping("/signup")
+    public String showSignUpForm(User user) {
+        return "add-user";
+    }
+    
+    @PostMapping("/adduser")
+    public String addUser(@Valid User user, BindingResult result, Model model) {
+        if (result.hasErrors()) {
+            return "add-user";
+        }
+        
+        userRepository.save(user);
+        model.addAttribute("users", userRepository.findAll());
+        return "index";
+    }
+    
+    @GetMapping("/edit/{id}")
+    public String showUpdateForm(@PathVariable("id") long id, Model model) {
+        User user = userRepository.findById(id).orElseThrow(() -> new IllegalArgumentException("Invalid user Id:" + id));
+        model.addAttribute("user", user);
+        return "update-user";
+    }
+    
+    @PostMapping("/update/{id}")
+    public String updateUser(@PathVariable("id") long id, @Valid User user, BindingResult result, Model model) {
+        if (result.hasErrors()) {
+            user.setId(id);
+            return "update-user";
+        }
+        
+        userRepository.save(user);
+        model.addAttribute("users", userRepository.findAll());
+        return "index";
+    }
+    
+    @GetMapping("/delete/{id}")
+    public String deleteUser(@PathVariable("id") long id, Model model) {
+        User user = userRepository.findById(id).orElseThrow(() -> new IllegalArgumentException("Invalid user Id:" + id));
+        userRepository.delete(user);
+        model.addAttribute("users", userRepository.findAll());
+        return "index";
+    }
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/springbootcrudapp/application/entities/User.java

@@ -0,0 +1,56 @@
+package com.baeldung.springbootcrudapp.application.entities;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.validation.constraints.NotBlank;
+
+@Entity
+public class User {
+    
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private long id;
+    @NotBlank(message = "Name is mandatory")
+    private String name;
+    
+    @NotBlank(message = "Email is mandatory")
+    private String email;
+
+    public User() {}
+
+    public User(String name, String email) {
+        this.name = name;
+        this.email = email;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+    
+    public long getId() {
+        return id;
+    }
+    
+    public void setName(String name) {
+        this.name = name;
+    }
+    
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    @Override
+    public String toString() {
+        return "User{" + "id=" + id + ", name=" + name + ", email=" + email + '}';
+    }
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/springbootcrudapp/application/repositories/UserRepository.java

@@ -0,0 +1,13 @@
+package com.baeldung.springbootcrudapp.application.repositories;
+
+import com.baeldung.springbootcrudapp.application.entities.User;
+import java.util.List;
+import org.springframework.data.repository.CrudRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface UserRepository extends CrudRepository<User, Long> {
+    
+    List<User> findByName(String name);
+    
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/springbootdatasourceconfig/application/Application.java

@@ -0,0 +1,27 @@
+package com.baeldung.springbootdatasourceconfig.application;
+
+import com.baeldung.springbootdatasourceconfig.application.entities.User;
+import com.baeldung.springbootdatasourceconfig.application.repositories.UserRepository;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+
+@SpringBootApplication
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+
+    @Bean
+    public CommandLineRunner run(UserRepository userRepository) throws Exception {
+        return (String[] args) -> {
+            User user1 = new User("John", "john@domain.com");
+            User user2 = new User("Julie", "julie@domain.com");
+            userRepository.save(user1);
+            userRepository.save(user2);
+            userRepository.findAll().forEach(user -> System.out.println(user.getName()));
+        };
+    }
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/springbootdatasourceconfig/application/datasources/DataSourceConfig.java

@@ -0,0 +1,20 @@
+package com.baeldung.springbootdatasourceconfig.application.datasources;
+
+import javax.sql.DataSource;
+import org.springframework.boot.jdbc.DataSourceBuilder;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class DataSourceConfig {
+    
+    @Bean
+    public DataSource getDataSource() {
+        DataSourceBuilder dataSourceBuilder = DataSourceBuilder.create();
+        dataSourceBuilder.driverClassName("org.h2.Driver");
+        dataSourceBuilder.url("jdbc:h2:mem:test");
+        dataSourceBuilder.username("SA");
+        dataSourceBuilder.password("");
+        return dataSourceBuilder.build();
+    }
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/springbootdatasourceconfig/application/entities/User.java

@@ -0,0 +1,46 @@
+package com.baeldung.springbootdatasourceconfig.application.entities;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.Table;
+
+@Entity
+@Table(name = "users")
+public class User {
+    
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private long id;
+    private String name;
+    private String email;
+    
+    public User(){}
+    
+    public User(String name, String email) {
+        this.name = name;
+        this.email = email;
+    }
+    
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    @Override
+    public String toString() {
+        return "User{" + "id=" + id + ", name=" + name + ", email=" + email + '}';
+    }    
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/springbootdatasourceconfig/application/repositories/UserRepository.java

@@ -0,0 +1,8 @@
+package com.baeldung.springbootdatasourceconfig.application.repositories;
+
+import com.baeldung.springbootdatasourceconfig.application.entities.User;
+import org.springframework.data.repository.CrudRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface UserRepository extends CrudRepository<User, Long> {}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/springboothibernate/application/ExampleApplication.java

@@ -0,0 +1,14 @@
+package com.baeldung.springboothibernate.application;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class ExampleApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(ExampleApplication.class, args);
+	}
+
+}
+

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/springboothibernate/application/datasources/DataSourceBean.java

@@ -0,0 +1,21 @@
+package com.baeldung.springboothibernate.application.datasources;
+
+import org.springframework.boot.jdbc.DataSourceBuilder;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import javax.sql.DataSource;
+
+@Configuration
+public class DataSourceBean {
+    
+    @Bean
+    public DataSource getDataSource() {
+        DataSourceBuilder dataSourceBuilder = DataSourceBuilder.create();
+        dataSourceBuilder.driverClassName("org.h2.Driver");
+        dataSourceBuilder.url("jdbc:h2:mem:test");
+        dataSourceBuilder.username("SA");
+        dataSourceBuilder.password("");
+        return dataSourceBuilder.build();
+    }
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/springboothibernate/application/models/Book.java

@@ -0,0 +1,40 @@
+package com.baeldung.springboothibernate.application.models;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+
+@Entity
+public class Book {
+
+    @Id
+    @GeneratedValue
+    private Long id;
+    private String name;
+
+    public Book() {
+        super();
+    }
+
+    public Book(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;
+    }
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/springboothibernate/application/repositories/BookRepository.java

@@ -0,0 +1,9 @@
+package com.baeldung.springboothibernate.application.repositories;
+
+import com.baeldung.springboothibernate.application.models.Book;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface BookRepository extends JpaRepository<Book, Long> {
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/springboothibernate/application/services/BookService.java

@@ -0,0 +1,19 @@
+package com.baeldung.springboothibernate.application.services;
+
+import com.baeldung.springboothibernate.application.models.Book;
+import com.baeldung.springboothibernate.application.repositories.BookRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+public class BookService {
+
+    @Autowired
+    private BookRepository bookRepository;
+
+    public List<Book> list() {
+        return bookRepository.findAll();
+    }
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/springboothsqldb/application/Application.java

@@ -0,0 +1,12 @@
+package com.baeldung.springboothsqldb.application;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Application {
+    
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/springboothsqldb/application/controllers/CustomerController.java

@@ -0,0 +1,33 @@
+package com.baeldung.springboothsqldb.application.controllers;
+
+import com.baeldung.springboothsqldb.application.entities.Customer;
+import com.baeldung.springboothsqldb.application.repositories.CustomerRepository;
+import java.util.List;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class CustomerController {
+    
+    private final CustomerRepository customerRepository;
+    
+    @Autowired
+    public CustomerController(CustomerRepository customerRepository) {
+        this.customerRepository = customerRepository;
+    }
+    
+    @PostMapping("/customers")
+    public Customer addCustomer(@RequestBody Customer customer) {
+        customerRepository.save(customer);
+        return customer;
+    }
+    
+    @GetMapping("/customers")
+    public List<Customer> getCustomers() {
+        return (List<Customer>) customerRepository.findAll();
+    }
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/springboothsqldb/application/entities/Customer.java

@@ -0,0 +1,55 @@
+package com.baeldung.springboothsqldb.application.entities;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.Table;
+
+@Entity
+@Table(name = "customers")
+public class Customer {
+    
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private long id;
+    
+    private String name;
+    private String email;
+    
+    public Customer() {}
+    
+    public Customer(String name, String email) {
+        this.name = name;
+        this.email = email;
+    }
+    
+    public void setId(long id) {
+        this.id = id;
+    }
+    
+    public long getId() {
+        return id;
+    }
+    
+    public void setName(String name) {
+        this.name = name;
+    }
+    
+    public String getName() {
+        return name;
+    }
+    
+    public void setEmail(String email) {
+        this.email = email;
+    }
+    
+    public String getEmail() {
+        return email;
+    }
+
+    @Override
+    public String toString() {
+        return "Customer{" + "id=" + id + ", name=" + name + ", email=" + email + '}';
+    }
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/springboothsqldb/application/repositories/CustomerRepository.java

@@ -0,0 +1,8 @@
+package com.baeldung.springboothsqldb.application.repositories;
+
+import com.baeldung.springboothsqldb.application.entities.Customer;
+import org.springframework.data.repository.CrudRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface CustomerRepository extends CrudRepository<Customer, Long> {}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/tomcatconnectionpool/application/SpringBootConsoleApplication.java

@@ -0,0 +1,22 @@
+package com.baeldung.tomcatconnectionpool.application;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.domain.EntityScan;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
+import org.springframework.transaction.annotation.EnableTransactionManagement;
+
+@SpringBootApplication  
+@EnableAutoConfiguration
+@ComponentScan(basePackages={"com.baeldung.tomcatconnectionpool.application"})
+@EnableJpaRepositories(basePackages="com.baeldung.tomcatconnectionpool.application.repositories")
+@EnableTransactionManagement
+@EntityScan(basePackages="com.baeldung.tomcatconnectionpool.application.entities")
+public class SpringBootConsoleApplication {
+    
+    public static void main(String[] args) {
+        SpringApplication.run(SpringBootConsoleApplication.class);
+    }
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/tomcatconnectionpool/application/entities/Customer.java

@@ -0,0 +1,53 @@
+package com.baeldung.tomcatconnectionpool.application.entities;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.Table;
+
+@Entity
+@Table(name = "customers")
+public class Customer {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private long id;
+    @Column(name = "first_name")
+    private String firstName;
+    @Column(name = "last_name")
+    private String lastName;
+    
+    public Customer() {}
+    
+    public Customer(String firstName, String lastName) {
+        this.firstName = firstName;
+        this.lastName = lastName;
+    }
+    
+    public long getId() {
+        return id;
+    }
+
+    public void setLastName(String lastName) {
+        this.lastName = lastName;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public void setFirstName(String firstName) {
+        this.firstName = firstName;
+    }
+    
+    public String getLastName() {
+        return lastName;
+    }
+
+    @Override
+    public String toString() {
+        return "Customer{" + "id=" + id + ", firstName=" + firstName + ", lastName=" + lastName + '}';
+    }
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/tomcatconnectionpool/application/repositories/CustomerRepository.java

@@ -0,0 +1,12 @@
+package com.baeldung.tomcatconnectionpool.application.repositories;
+
+import com.baeldung.tomcatconnectionpool.application.entities.Customer;
+import java.util.List;
+import org.springframework.data.repository.CrudRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface CustomerRepository extends CrudRepository<Customer, Long> {
+    
+    List<Customer> findByLastName(String lastName);
+}

persistence-modules/spring-boot-persistence/src/main/java/com/baeldung/tomcatconnectionpool/application/runners/CommandLineCrudRunner.java

@@ -0,0 +1,37 @@
+package com.baeldung.tomcatconnectionpool.application.runners;
+
+import com.baeldung.tomcatconnectionpool.application.entities.Customer;
+import com.baeldung.tomcatconnectionpool.application.repositories.CustomerRepository;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.stereotype.Component;
+
+@Component
+public class CommandLineCrudRunner implements CommandLineRunner {
+    
+    private static final Logger logger = LoggerFactory.getLogger(CommandLineCrudRunner.class);
+    
+    @Autowired
+    private CustomerRepository customerRepository;
+    
+    @Override
+    public void run(String... args) throws Exception {
+        customerRepository.save(new Customer("John", "Doe"));
+        customerRepository.save(new Customer("Jennifer", "Wilson"));
+        
+        logger.info("Customers found with findAll():");
+        customerRepository.findAll().forEach(c -> logger.info(c.toString()));
+        
+        logger.info("Customer found with findById(1L):");
+        Customer customer = customerRepository.findById(1L)
+                .orElseGet(() -> new Customer("Non-existing customer", ""));
+        logger.info(customer.toString());
+        
+        logger.info("Customer found with findByLastName('Wilson'):");
+        customerRepository.findByLastName("Wilson").forEach(c -> {
+            logger.info(c.toString());
+        });
+    }
+}