Merge pull request #8125 from eugenp/revert-8119-BAEL-3275-2

Revert "BAEL-3275: Using blocking queue for pub-sub"

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 {
+    //
+}