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Adding files for the tutorial BAEL-1877: A Guide to Hibernate OGM (#5909)

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* Adding files for the tutorial BAEL-1877: A Guide to Hibernate OGM

* Removing test for MongoDB as there may not be MongoDB running on integration platform.

* Reapplied the standard Java formatter.

* Incorporatd the review comments on the tutorial.

* Commented out the integration test for MongoDB.

* Removed implicit dependencies from pom.xml
This commit is contained in:
Kumar Chandrakant 2018-12-15 22:40:55 +05:30 committed by maibin
parent c5a23bcf47
commit 9271f10941
8 changed files with 364 additions and 0 deletions
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4
persistence-modules/hibernate-ogm/README.md Normal file
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## Relevant articles:
- [Guide to Hibernate OGM](http://www.baeldung.com/xxxx)

60
persistence-modules/hibernate-ogm/pom.xml Normal file
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<?xml version="1.0"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung</groupId>
<artifactId>hibernate-ogm</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>hibernate-ogm</name>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
<relativePath>../../</relativePath>
</parent>
<dependencies>
<!-- MongoDB -->
<dependency>
<groupId>org.hibernate.ogm</groupId>
<artifactId>hibernate-ogm-mongodb</artifactId>
<version>5.4.0.Final</version>
</dependency>
<!-- Neo4j -->
<dependency>
<groupId>org.hibernate.ogm</groupId>
<artifactId>hibernate-ogm-neo4j</artifactId>
<version>5.4.0.Final</version>
</dependency>
<!-- Narayana JTA -->
<dependency>
<groupId>org.jboss.narayana.jta</groupId>
<artifactId>narayana-jta</artifactId>
<version>5.5.23.Final</version>
</dependency>
<!-- Testing -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.easytesting</groupId>
<artifactId>fest-assert</artifactId>
<version>1.4</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<finalName>hibernate-ogm</finalName>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
</resources>
</build>
</project>

54
persistence-modules/hibernate-ogm/src/main/java/com/baeldung/hibernate/ogm/Article.java Normal file
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package com.baeldung.hibernate.ogm;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.ManyToOne;
import org.hibernate.annotations.GenericGenerator;
@Entity
public class Article {
@Id
@GeneratedValue(generator = "uuid")
@GenericGenerator(name = "uuid", strategy = "uuid2")
private String articleId;
private String articleTitle;
@ManyToOne
private Author author;
// constructors, getters and setters...
Article() {
}
public Article(String articleTitle) {
this.articleTitle = articleTitle;
}
public String getArticleId() {
return articleId;
}
public void setArticleId(String articleId) {
this.articleId = articleId;
}
public String getArticleTitle() {
return articleTitle;
}
public void setArticleTitle(String articleTitle) {
this.articleTitle = articleTitle;
}
public Author getAuthor() {
return author;
}
public void setAuthor(Author author) {
this.author = author;
}
}

70
persistence-modules/hibernate-ogm/src/main/java/com/baeldung/hibernate/ogm/Author.java Normal file
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package com.baeldung.hibernate.ogm;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
import org.hibernate.annotations.GenericGenerator;
@Entity
public class Author {
@Id
@GeneratedValue(generator = "uuid")
@GenericGenerator(name = "uuid", strategy = "uuid2")
private String authorId;
private String authorName;
@ManyToOne
private Editor editor;
@OneToMany(mappedBy = "author", cascade = CascadeType.PERSIST)
private Set<Article> authoredArticles = new HashSet<>();
// constructors, getters and setters...
Author() {
}
public Author(String authorName) {
this.authorName = authorName;
}
public String getAuthorId() {
return authorId;
}
public void setAuthorId(String authorId) {
this.authorId = authorId;
}
public String getAuthorName() {
return authorName;
}
public void setAuthorName(String authorName) {
this.authorName = authorName;
}
public Editor getEditor() {
return editor;
}
public void setEditor(Editor editor) {
this.editor = editor;
}
public Set<Article> getAuthoredArticles() {
return authoredArticles;
}
public void setAuthoredArticles(Set<Article> authoredArticles) {
this.authoredArticles = authoredArticles;
}
}

58
persistence-modules/hibernate-ogm/src/main/java/com/baeldung/hibernate/ogm/Editor.java Normal file
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package com.baeldung.hibernate.ogm;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import org.hibernate.annotations.GenericGenerator;
@Entity
public class Editor {
@Id
@GeneratedValue(generator = "uuid")
@GenericGenerator(name = "uuid", strategy = "uuid2")
private String editorId;
private String editorName;
@OneToMany(mappedBy = "editor", cascade = CascadeType.PERSIST)
private Set<Author> assignedAuthors = new HashSet<>();
// constructors, getters and setters...
Editor() {
}
public Editor(String editorName) {
this.editorName = editorName;
}
public String getEditorId() {
return editorId;
}
public void setEditorId(String editorId) {
this.editorId = editorId;
}
public String getEditorName() {
return editorName;
}
public void setEditorName(String editorName) {
this.editorName = editorName;
}
public Set<Author> getAssignedAuthors() {
return assignedAuthors;
}
public void setAssignedAuthors(Set<Author> assignedAuthors) {
this.assignedAuthors = assignedAuthors;
}
}

24
persistence-modules/hibernate-ogm/src/main/resources/META-INF/persistence.xml Normal file
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<?xml version="1.0" encoding="utf-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
version="2.0">
<!-- MongoDB -->
<persistence-unit name="ogm-mongodb" transaction-type="JTA">
<provider>org.hibernate.ogm.jpa.HibernateOgmPersistence</provider>
<properties>
<property name="hibernate.ogm.datastore.provider" value="MONGODB" />
<property name="hibernate.ogm.datastore.database" value="TestDB" />
<property name="hibernate.ogm.datastore.create_database" value="true" />
</properties>
</persistence-unit>
<!-- Neo4j -->
<persistence-unit name="ogm-neo4j" transaction-type="JTA">
<provider>org.hibernate.ogm.jpa.HibernateOgmPersistence</provider>
<properties>
<property name="hibernate.ogm.datastore.provider" value="NEO4J_EMBEDDED" />
<property name="hibernate.ogm.datastore.database" value="TestDB" />
<property name="hibernate.ogm.neo4j.database_path" value="target/test_data_dir" />
</properties>
</persistence-unit>
</persistence>

92
persistence-modules/hibernate-ogm/src/test/java/com/baeldung/hibernate/ogm/EditorUnitTest.java Normal file
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package com.baeldung.hibernate.ogm;
import static org.fest.assertions.Assertions.assertThat;
import java.util.Map;
import java.util.stream.Collectors;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.transaction.TransactionManager;
import org.junit.Test;
public class EditorUnitTest {
/*
@Test
public void givenMongoDB_WhenEntitiesCreated_thenCanBeRetrieved() throws Exception {
EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory("ogm-mongodb");
Editor editor = generateTestData();
persistTestData(entityManagerFactory, editor);
loadAndVerifyTestData(entityManagerFactory, editor);
}
*/
@Test
public void givenNeo4j_WhenEntitiesCreated_thenCanBeRetrieved() throws Exception {
EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory("ogm-neo4j");
Editor editor = generateTestData();
persistTestData(entityManagerFactory, editor);
loadAndVerifyTestData(entityManagerFactory, editor);
}
private void persistTestData(EntityManagerFactory entityManagerFactory, Editor editor) throws Exception {
TransactionManager transactionManager = com.arjuna.ats.jta.TransactionManager.transactionManager();
EntityManager entityManager;
transactionManager.begin();
entityManager = entityManagerFactory.createEntityManager();
entityManager.persist(editor);
entityManager.close();
transactionManager.commit();
}
private void loadAndVerifyTestData(EntityManagerFactory entityManagerFactory, Editor editor) throws Exception {
TransactionManager transactionManager = com.arjuna.ats.jta.TransactionManager.transactionManager();
EntityManager entityManager;
transactionManager.begin();
entityManager = entityManagerFactory.createEntityManager();
Editor loadedEditor = entityManager.find(Editor.class, editor.getEditorId());
assertThat(loadedEditor).isNotNull();
assertThat(loadedEditor.getEditorName()).isEqualTo("Tom");
assertThat(loadedEditor.getAssignedAuthors()).onProperty("authorName")
.containsOnly("Maria", "Mike");
Map<String, Author> loadedAuthors = loadedEditor.getAssignedAuthors()
.stream()
.collect(Collectors.toMap(Author::getAuthorName, e -> e));
assertThat(loadedAuthors.get("Maria")
.getAuthoredArticles()).onProperty("articleTitle")
.containsOnly("Basic of Hibernate OGM");
assertThat(loadedAuthors.get("Mike")
.getAuthoredArticles()).onProperty("articleTitle")
.containsOnly("Intermediate of Hibernate OGM", "Advanced of Hibernate OGM");
entityManager.close();
transactionManager.commit();
}
private Editor generateTestData() {
Editor tom = new Editor("Tom");
Author maria = new Author("Maria");
Author mike = new Author("Mike");
Article basic = new Article("Basic of Hibernate OGM");
Article intermediate = new Article("Intermediate of Hibernate OGM");
Article advanced = new Article("Advanced of Hibernate OGM");
maria.getAuthoredArticles()
.add(basic);
basic.setAuthor(maria);
mike.getAuthoredArticles()
.add(intermediate);
intermediate.setAuthor(mike);
mike.getAuthoredArticles()
.add(advanced);
advanced.setAuthor(mike);
tom.getAssignedAuthors()
.add(maria);
maria.setEditor(tom);
tom.getAssignedAuthors()
.add(mike);
mike.setEditor(tom);
return tom;
}
}

2
pom.xml
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@ -509,6 +509,7 @@
<module>persistence-modules/flyway</module>
<module>persistence-modules/hbase</module>
<module>persistence-modules/hibernate5</module>
<module>persistence-modules/hibernate-ogm</module>
<module>persistence-modules/influxdb</module>
<module>persistence-modules/java-cassandra</module>
<module>persistence-modules/java-cockroachdb</module>
@ -1220,6 +1221,7 @@
<module>persistence-modules/flyway</module>
<module>persistence-modules/hbase</module>
<module>persistence-modules/hibernate5</module>
<module>persistence-modules/hibernate-ogm</module>
<module>persistence-modules/influxdb</module>
<module>persistence-modules/java-cassandra</module>
<module>persistence-modules/java-cockroachdb</module>