I'm using following dependencies to get a dbunit test going
<dependency>
<groupId>org.dbunit</groupId>
<artifactId>dbunit</artifactId>
<version>2.4.9</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.hsqldb</groupId>
<artifactId>hsqldb</artifactId>
<version>2.3.4</version>
<scope>test</scope>
</dependency>
The test runs perfectly in inteliJ over and over but when I run the test on command line it fails all the time with foreign key constraint errors on loading the second test in my test class
<?xml version='1.0' encoding='UTF-8'?>
<dataset>
<PUBLIC.REGIO id="1" entiteit="1" code="a" naam="regio 1"/>
<PUBLIC.REGIO id="2" entiteit="2" code="b" naam="regio 2"/>
<PUBLIC.REGIO />
</dataset>
<persistence version="1.0" 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_1_0.xsd">
<persistence-unit name="voertuigbeheer" transaction-type="RESOURCE_LOCAL">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<class>be.delijn.voertuigbeheer.entity.Regio</class>
<class>be.delijn.voertuigbeheer.entity.Stelplaats</class>
<class>be.delijn.voertuigbeheer.entity.VoertuigType</class>
<class>be.delijn.voertuigbeheer.entity.Voertuig</class>
<class>be.delijn.voertuigbeheer.entity.VoertuigEigenschap</class>
<exclude-unlisted-classes>false</exclude-unlisted-classes>
<properties>
<property name="eclipselink.logging.level" value="FINE"/>
<property name="eclipselink.logging.thread" value="false"/>
<property name="eclipselink.logging.session" value="false"/>
<property name="eclipselink.logging.timestamp" value="false"/>
<property name="eclipselink.logging.exceptions" value="false"/>
<property name="javax.persistence.jdbc.driver" value="org.hsqldb.jdbcDriver"/>
<property name="javax.persistence.jdbc.url" value="jdbc:hsql:mem"/>
<property name="javax.persistence.jdbc.user" value="sa"/>
<property name="javax.persistence.jdbc.password" value=""/>
</properties>
</persistence-unit>
</persistence>
public abstract class AbstractJPATest {
protected static EntityManagerFactory entityManagerFactory;
protected static EntityManager entityManager;
protected static IDatabaseConnection connection;
protected static IDataSet dataset;
#BeforeClass
public static void initEntityManager() throws Exception {
System.out.println("before class running");
entityManagerFactory = Persistence.createEntityManagerFactory("voertuigbeheer");
entityManager = entityManagerFactory.createEntityManager();
ServerSession serverSession = entityManager.unwrap(ServerSession.class);
SchemaManager schemaManager = new SchemaManager(serverSession);
schemaManager.replaceDefaultTables(true, true);
ConnectionPool connectionPool = serverSession.getConnectionPool("default");
Connection dbconn = connectionPool.acquireConnection().getConnection();
connection = new DatabaseConnection(dbconn);
DatabaseConfig config = connection.getConfig();
config.setProperty(DatabaseConfig.PROPERTY_DATATYPE_FACTORY, new HsqldbDataTypeFactory());
config.setProperty(DatabaseConfig.FEATURE_QUALIFIED_TABLE_NAMES, true);
FlatXmlDataSetBuilder flatXmlDataSetBuilder = new FlatXmlDataSetBuilder();
flatXmlDataSetBuilder.setColumnSensing(true);
dataset = flatXmlDataSetBuilder.build(
Thread.currentThread().getContextClassLoader().getResourceAsStream("test-dataset.xml"));
}
#AfterClass
public static void closeEntityManager() {
entityManager.close();
entityManagerFactory.close();
}
#Before
public void cleanDB() throws Exception {
System.out.println("loading");
DatabaseOperation.CLEAN_INSERT.execute(connection, dataset);
setup();
}
public abstract void setup();
}
public class RegioDaoTests extends AbstractJPATest {
private RegioDao regioDao;
#Test
public void getAll() throws Exception {
List<Regio> result = regioDao.getAll();
assertThat(result.size()).isEqualTo(2);
}
#Test
public void getById() throws Exception {
Regio regio = regioDao.getById(2L);
assertThat(regio.getId()).isEqualTo(2);
}
#Override
public void setup() {
regioDao = new RegioDao();
regioDao.setEntityManager(entityManager);
}
}
Caused by: org.hsqldb.HsqlException: integrity constraint violation: unique constraint or index violation; SYS_PK_10234 table: REGIO
at org.hsqldb.error.Error.error(Unknown Source)
at org.hsqldb.Constraint.getException(Unknown Source)
at org.hsqldb.index.IndexAVLMemory.insert(Unknown Source)
at org.hsqldb.persist.RowStoreAVL.indexRow(Unknown Source)
at org.hsqldb.TransactionManager2PL.addInsertAction(Unknown Source)
at org.hsqldb.Session.addInsertAction(Unknown Source)
at org.hsqldb.Table.insertSingleRow(Unknown Source)
at org.hsqldb.StatementDML.insertSingleRow(Unknown Source)
at org.hsqldb.StatementInsert.getResult(Unknown Source)
at org.hsqldb.StatementDMQL.execute(Unknown Source)
at org.hsqldb.Session.executeCompiledStatement(Unknown Source)
at org.hsqldb.Session.execute(Unknown Source)
I've tried switching from HSQL to H2 and vice versa both databases give the same problem. However again running the tests in InteliJ work perfectly. It's running in maven that keeps throwing the error. What am I missing here I'm totally lost why it wouldn't work
I found it ... taking a step back and rethinking things found me the sollution maven by default runs test methods in paralell. If you restrict maven to only run classes in paralell I was able to fix it
<build>
<finalName>voertuigbeheer-web</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.19.1</version>
<configuration>
<parallel>classes</parallel>
</configuration>
</plugin>
</plugins>
</build>
This was a very annoying "feature" to track down !
Related
I try to make use a Database system without have to run a separate database program.
I decided to use Hibernate SQLite. And I'm getting desperate here.
can someone pls tell me what i am doing whrong, or where i can find more help? I Faild with google, and ChatGPT was as always not helpfull to.
And for every one how try to convince me to use for example MariaDB, no. I need it to be one java application. Not more, not less...
src\main\resources\hibernate.cfg.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!-- <property name="hibernate.connection.url">jdbc:sqlite:path/to/your/database.db</property> -->
<property name="hibernate.connection.driver_class">org.sqlite.JDBC</property>
<property name="hibernate.connection.url">jdbc:sqlite:database.db</property>
<property name="hibernate.dialect">org.hibernate.dialect.SQLiteDialect</property>
<property name="hibernate.show_sql">true</property>
<property name="hibernate.hbm2ddl.auto">create</property>
<mapping class="de.minetrain.kekbot.database.test.Person"/>
</session-factory>
</hibernate-configuration>
src\main\resources\persistence.xml:
<?xml version="1.0" encoding="UTF-8"?>
<persistence 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_2.xsd" version="2.2">
<persistence-unit name="my-persistence-unit" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<class>de.minetrain.kekbot.database.test.Person</class>
<!-- <class>com.example.MyOtherEntity</class> -->
<properties>
<property name="hibernate.connection.driver_class" value="org.sqlite.JDBC" />
<!-- <property name="hibernate.connection.url" value="jdbc:sqlite:path/to/your/database.db" /> -->
<property name="hibernate.connection.url" value="jdbc:sqlite:database.db" />
<property name="hibernate.connection.username" value="" />
<property name="hibernate.connection.password" value="" />
<property name="hibernate.dialect" value="org.hibernate.dialect.SQLiteDialect" />
<property name="hibernate.hbm2ddl.auto" value="update" />
<!-- <property name="hibernate.show_sql" value="true" /> -->
</properties>
</persistence-unit>
</persistence>
pom.xml
</ependencies>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.6.1.Final</version>
</dependency>
<dependency>
<groupId>org.xerial</groupId>
<artifactId>sqlite-jdbc</artifactId>
<version>3.34.0</version>
</dependency>
</dependencies>
HibernateUtil class:
package de.minetrain.kekbot.database.test;
import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class HibernateUtil {
private static final Logger logger = LoggerFactory.getLogger(HibernateUtil.class);
private static final SessionFactory sessionFactory = buildSessionFactory();
private static SessionFactory buildSessionFactory() {
try {
Class.forName("org.sqlite.JDBC");
} catch (ClassNotFoundException e) {
logger.error("Dant find class: ",e);
}
try {
Configuration configuration = new Configuration().configure("hibernate.cfg.xml"); // may wrong?
StandardServiceRegistryBuilder builder = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties());
return configuration.buildSessionFactory(builder.build());
} catch (Throwable ex) {
System.err.println("Initial SessionFactory creation failed." + ex);
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory() {
return sessionFactory;
}
}
Entity class:
package de.minetrain.kekbot.database.test;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
#Entity
public class Person {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
private Long id;
private String name;
private int age;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
And the class i try to whrite into the database:
package de.minetrain.kekbot.database.test;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
public class Database {
public static void test(){
SessionFactory sessionFactory = HibernateUtil.getSessionFactory();
Session session = sessionFactory.openSession();
// Verwenden Sie die Session, um Datenbankoperationen auszuführen
// session.close();
Transaction tx = null;
try {
tx = session.beginTransaction();
Person person = new Person();
person.setName("Max Mustermann");
person.setAge(30);
session.save(person);
tx.commit();
} catch (HibernateException ex) {
if (tx != null) {
tx.rollback();
}
ex.printStackTrace();
} finally {
session.close();
}
}
}
I just wanna lern to use SQLite, and try to Whrite a new person object into a database file.
Errors:
[20:00:15] >> WARN << [org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator] - HHH000342: Could not obtain connection to query metadata java.lang.IllegalStateException: Cannot get a connection as the driver manager is not properly initialized
Initial SessionFactory creation failed.org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
Exception in thread "main" java.lang.ExceptionInInitializerError
Caused by: org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
Caused by: org.hibernate.boot.registry.selector.spi.StrategySelectionException: Unable to resolve name [org.hibernate.dialect.SQLiteDialect] as strategy [org.hibernate.dialect.Dialect]
Caused by: org.hibernate.boot.registry.classloading.spi.ClassLoadingException: Unable to load class [org.hibernate.dialect.SQLiteDialect]
Caused by: java.lang.ClassNotFoundException: Could not load requested class : org.hibernate.dialect.SQLiteDialect
I've managed to change the Exeptions. With the help from #andrewJames I found out, that I have to use a dialect, which I didn't know. I also noticed that I am using old versions of Hibernate and co.
And sorry in advance, for every experienced coder how gets headaches from my stupidity. I am not new to coding, but I am very new to databases and dealing with dependency's outside from just API package things. I tried to google as much as I could find, and testing every thing I could. But I ended up having to ask again. I am very sorry.
Iive changed stuff around and now have this pom.xml:
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>6.1.6.Final</version>
</dependency>
<dependency>
<groupId>org.xerial</groupId>
<artifactId>sqlite-jdbc</artifactId>
<version>3.40.0.0</version>
</dependency>
<dependency>
<groupId>com.github.gwenn</groupId>
<artifactId>sqlite-dialect</artifactId>
<version>0.1.2</version>
</dependency>
I've changed the dialect in the hibernate.cfg.xml:
<property name="hibernate.dialect">org.sqlite.hibernate.dialect.SQLiteDialect</property>
persistence.xml:
<property name="hibernate.dialect" value="org.sqlite.hibernate.dialect.SQLiteDialect" />
However, now I get the benefit of dealing with this exception:
[00:07:48] >> INFO << [org.hibernate.Version] - HHH000412: Hibernate ORM core version 6.1.6.Final
Initial SessionFactory creation failed.java.util.ServiceConfigurationError: org.hibernate.boot.spi.MetadataBuilderInitializer: Provider org.sqlite.hibernate.dialect.SQLiteMetadataBuilderInitializer could not be instantiated
Exception in thread "main" java.lang.ExceptionInInitializerError
Caused by: java.util.ServiceConfigurationError: org.hibernate.boot.spi.MetadataBuilderInitializer: Provider org.sqlite.hibernate.dialect.SQLiteMetadataBuilderInitializer could not be instantiated
Caused by: java.lang.NoClassDefFoundError: org/hibernate/dialect/function/SQLFunction
Caused by: java.lang.ClassNotFoundException: org.hibernate.dialect.function.SQLFunction
I am using hibernate in my Java EE application in combination with my Wildfly server to persist my Classes in a mysql Database.
So far this works fine but now I am writing unit tests and I am getting crazy about some error which I get.
I would like to test my DAO-Layer in my Unit-Tests but I get these errors:
Caused by: org.hibernate.engine.jndi.JndiException: Error parsing JNDI name [java:/MySqlDS]
Caused by: javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial
my persistence.xml ist this:
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0"
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">
<persistence-unit name="primary">
<jta-data-source>java:/MySqlDS</jta-data-source>
<class>org.se.bac.data.Employee</class>
<properties>
<!-- Properties for Hibernate -->
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect" />
<property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>
<property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/empdb?useSSL=false"/>
<property name="hibernate.connection.username" value="student"/>
<property name="hibernate.connection.password" value="student"/>
<!--
SQL stdout logging
-->
<property name="hibernate.show_sql" value="true"/>
<property name="hibernate.format_sql" value="true"/>
<property name="use_sql_comments" value="true"/>
</properties>
</persistence-unit>
</persistence>
So, Here I am using a jta-data-source> as you can see.
If I remove this line my tests are going fine! But I can not build my project with maven anymore.
Error:
Caused by: org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
Caused by: org.hibernate.boot.registry.classloading.spi.ClassLoadingException: Unable to load class [com.mysql.jdbc.Driver]
Caused by: java.lang.ClassNotFoundException: Could not load requested class : com.mysql.jdbc.Driver"}}
He can not find the datasource because I removed the line in my persistence.xml
How can I manage to get both run in my application. The tests and of course the maven build?
Here is my test: (Setup is already causing the error):
package org.se.bac.data.dao;
import java.util.List;
import javax.persistence.EntityManager;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Assert;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import org.se.bac.data.model.Employee;
public class EmployeeDAOTest
{
private static final JdbcTestHelper JDBC_HELPER = new JdbcTestHelper();
private final static JpaTestHelper JPA_HELPER = new JpaTestHelper();
private EntityManager em = JPA_HELPER.getEntityManager("primary");
private EmpDAO dao;
#BeforeClass
public static void init()
{
JDBC_HELPER.executeSqlScript("sql/test/dropEmployeeTable.sql");
JDBC_HELPER.executeSqlScript("sql/test/createEmployeeTable.sql");
}
#AfterClass
public static void destroy()
{
//JDBC_HELPER.executeSqlScript("sql/test/dropEmployeeTable.sql");
}
#Before
public void setUp()
{
JDBC_HELPER.executeSqlScript("sql/test/dropEmployeeTable.sql");
JDBC_HELPER.executeSqlScript("sql/test/createEmployeeTable.sql");
dao = new EmpDAOImpl();
dao.setEm(em);
JPA_HELPER.txBegin();
Employee emp2 = new Employee();
emp2.setFirstname("Max");
emp2.setLastname("Muster");
emp2.setHiredate("23-12-1991");
dao.insert(emp2);
}
And JPAHELPER Class:
package org.se.bac.data.dao;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.EntityTransaction;
import javax.persistence.Persistence;
public class JpaTestHelper
{
/*
* Property: persistenceUnitName
*/
private String persistenceUnitName;
public String getPersistenceUnitName()
{
return persistenceUnitName;
}
public void setPersistenceUnitName(String persistenceUnitName)
{
if(persistenceUnitName == null || persistenceUnitName.length() == 0)
throw new IllegalArgumentException("Illegal parameter persistenceUnitName = " + persistenceUnitName);
this.persistenceUnitName = persistenceUnitName;
}
/*
* Get an instance of the EntityManagerFactory.
*/
protected EntityManagerFactory getEnityManagerFactory()
{
if(persistenceUnitName == null)
throw new IllegalStateException("PersistenceUnitName must be set!");
return Persistence.createEntityManagerFactory(persistenceUnitName);
}
/*
* Manage an EntityManager.
*/
private EntityManager em;
public EntityManager getEntityManager()
{
if(em == null)
{
em = getEnityManagerFactory().createEntityManager();
}
return em;
}
public EntityManager getEntityManager(String persistenceUnitName)
{
setPersistenceUnitName(persistenceUnitName);
return getEntityManager();
}
public void closeEntityManager()
{
if(em != null)
em.close();
}
/*
* Handle Transactions
*/
protected void txBegin()
{
EntityTransaction tx = em.getTransaction();
tx.begin();
}
protected void txCommit()
{
EntityTransaction tx = em.getTransaction();
if(tx.getRollbackOnly())
{
tx.rollback();
}
else
{
tx.commit();
}
}
protected void txRollback()
{
EntityTransaction tx = em.getTransaction();
tx.rollback();
}
}
and my DAO:
package org.se.bac.data.dao;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import org.se.bac.data.model.Employee;
class EmpDAOImpl // package private
implements EmpDAO
{
#PersistenceContext
private EntityManager em;
/*
* CRUD methods
*/
public Employee findById(int id)
{
System.out.println("empdaoimpl ID " + id);
return em.find(Employee.class, id);
}
public EntityManager getEm() {
return em;
}
public void setEm(EntityManager em) {
this.em = em;
}
}
Wildfly Datasource:
<datasources>
<datasource jta="true" jndi-name="java:/MySqlDS" pool-name="MySqlDS" enabled="true" use-ccm="false">
<connection-url>jdbc:mysql://localhost:3306/empdb?useSSL=false</connection-url>
<driver-class>com.mysql.jdbc.Driver</driver-class>
<driver>mysql-connector-java-5.1.44-bin.jar_com.mysql.jdbc.Driver_5_1</driver>
<security>
<user-name>student</user-name>
<password>student</password>
</security>
<validation>
<valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLValidConnectionChecker"/>
<background-validation>true</background-validation>
<exception-sorter class-name="org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLExceptionSorter"/>
</validation>
</datasource>
</datasources>
He can not find the datasource because I removed the line in my persistence.xml
How can I manage to get both run in my application.
The problem is that the data source is managed by Wildfly which is not available on your test environment. So what you could do is define two separate persistence units (one for your production code and the other for the test) as follows:
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" 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">
<persistence-unit name="primary">
<jta-data-source>java:/MySqlDS</jta-data-source>
<properties>
<!-- Properties for Hibernate -->
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect" />
<!-- SQL stdout logging -->
<property name="hibernate.show_sql" value="true"/>
<property name="hibernate.format_sql" value="true"/>
<property name="use_sql_comments" value="true"/>
</properties>
</persistence-unit>
<persistence-unit name="testPU" transaction-type="RESOURCE_LOCAL">
<class>org.se.bac.data.Employee</class>
<properties>
<!-- Properties for Hibernate -->
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect" />
<property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>
<property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/empdb?useSSL=false"/>
<property name="hibernate.connection.username" value="student"/>
<property name="hibernate.connection.password" value="student"/>
<!-- SQL stdout logging -->
<property name="hibernate.show_sql" value="true"/>
<property name="hibernate.format_sql" value="true"/>
<property name="use_sql_comments" value="true"/>
</properties>
</persistence-unit>
</persistence>
and then in your EmployeeDAOTest class modify the following line as:
private EntityManager em = JPA_HELPER.getEntityManager("testPU");
Note:
I removed the JDBC connection properties from the primary persistence unit because you don't need them as you already have the data source there on Wildfly.
I have a piece of example code:
public class JpaTest {
private EntityManagerFactory emf;
private void setUp() throws Exception {
emf = Persistence.createEntityManagerFactory("testPU");
}
private void tearDown() {
emf.close();
}
private void save() {
EntityManager em = null;
EntityTransaction tx = null;
try {
em = emf.createEntityManager();
tx = em.getTransaction();
tx.begin();
em.persist(new Event("First event", new Date()));
em.persist(new Event("A follow up event", new Date()));
throw new RuntimeException();
} catch (Exception e) {
if (tx != null) tx.rollback();
} finally {
if (em != null) em.close();
}
}
public static void main(String[] args) throws Exception {
JpaTest test = new JpaTest();
test.setUp();
test.save();
test.tearDown();
}
}
The database is MySQL.
The code persists Event entity into the database and than throws an Exception. I expect tx.rollback() to delete the changes made into the database, but this command never works and the data remains in the table:
The question is why tx.rollback() fails and how to delete changes made in the database if transaction throws an Exception?
UPDATED:
persistence.xml:
<persistence 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"
version="2.1">
<persistence-unit name="testPU">
<class>exampleForTestingJpa.Event</class>
<properties>
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>
<property name="javax.persistence.jdbc.url"
value="url here..."/>
<property name="javax.persistence.jdbc.user" value="username here..."/>
<property name="javax.persistence.jdbc.password" value="password here..."/>
<property name="hibernate.show_sql" value="true"/>
<property name="hibernate.hbm2ddl.auto" value="update"/>
<property name="hibernate.connection.autocommit" value="false"/>
</properties>
</persistence-unit>
</persistence>
pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>groupId</groupId>
<artifactId>example</artifactId>
<version>1.0-SNAPSHOT</version>
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>4.3.8.RELEASE</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.2.9.Final</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.39</version>
</dependency>
</dependencies>
</project>
Add this to your persistence.xml
<property name="hibernate.connection.autocommit" value="false"/>
Maybe autocommit is enabled ? MySQL manual states that autocommit is enabled by default.
If thats the problem, you surely will not be the first who stumbled over that ;-)
As other users said, it is probably a auto-commit issue since according to the MySQL documentation :
In InnoDB ...
By default, MySQL starts the session for each new connection with
autocommit enabled, so MySQL does a commit after each SQL statement if
that statement did not return an error. If a statement returns an
error, the commit or rollback behavior depends on the error. See
Section 14.21.4, “InnoDB Error Handling”.
Besides, you should not store the Transaction object in a variable.
At each time you want to invoke a Transaction method, get the Transaction object from the EntityManager.
So replace :
tx = em.getTransaction();
tx.begin();
by :
em.getTransaction().begin();
And replace tx.rollback(); by em.getTransaction().rollback();
The Transaction object stored in the EntityManager may be serialized and so have a new reference during transaction processing.
For example, look at the serialization method of AbstractEntityManagerImpl:
public class org.hibernate.jpa.spi.AbstractEntityManagerImpl{
...
private void readObject(ObjectInputStream ois) throws IOException, ClassNotFoundException {
ois.defaultReadObject();
tx = new TransactionImpl( this );
}
...
}
The problem with not rolling transaction back was caused by MyISAM. With InnoDB rollback works fine.
Exception in thread "main" java.lang.ClassFormatError: Absent Code attribute in method that is not native or abstract in class file javax/persistence/Persistence
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at com.bt.niab.ejbservice.junit.DBTest.init(DBTest.java:51)
at com.bt.niab.ejbservice.junit.DBTest.main(DBTest.java:28)
Please help to solve this error. I tried adding and removing few jars that were mentioned in other post but it did not help... While debugging exceptions is thrown at: EntityManagerFactory factory = Persistence.createEntityManagerFactory("testdb");
Persistence.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0"
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_1_0.xsd">
<persistence-unit name="testDB" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<!-- <jta-data-source>com.bt.niab.jdbc.datasource.niabdl</jta-data-source> -->
<class> (Cannot mention here) </class>
<properties>
<property name="javax.persistence.jdbc.url" value="db_url (Cannot mention here)" />
<property name="javax.persistence.jdbc.user" value="user" />
<property name="javax.persistence.jdbc.password" value="pass" />
<property name="javax.persistence.jdbc.driver" value="oracle.jdbc.driver.OracleDriver" />
<property name="hibernate.dialect" value="org.hibernate.dialect.Oracle10gDialect" />
<property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.WeblogicTransactionManagerLookup" />
<property name="hibernate.show_sql" value="true" />
<property name="hibernate.format_sql" value="true" />
<property name="hibernate.query.factory_class" value="org.hibernate.hql.classic.ClassicQueryTranslatorFactory" />
</properties>
</persistence-unit>
</persistence>
DBTest.java
package com.bt.niab.ejbservice.junit;
import java.util.ArrayList;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.EntityTransaction;
import javax.persistence.Persistence;
import javax.persistence.Query;
public class DBTest {
EntityManagerFactory factory;
EntityManager manager;
EntityTransaction tx;
public static void main(String[] args)
{
DBTest obj = new DBTest();
try
{
obj.init();
obj.search();
}
catch (Exception e)
{
e.printStackTrace();
}
finally
{
obj.shutdown();
}
}
private void shutdown()
{
System.out.println("Inside Shutdown method");
manager.close();
factory.close();
}
public void init()
{
System.out.println("Inside init method");
factory = Persistence.createEntityManagerFactory("IonixDLUnit");
manager = factory.createEntityManager();
System.out.println("After init method");
}
private void search()
{
System.out.println("Inside Search method");
ArrayList<DBTest> arrayList = new ArrayList<DBTest>();
tx = manager.getTransaction();
tx.begin();
Query query = manager.createQuery("SELECT * FROM address");
if(query != null)
{
arrayList = (ArrayList<DBTest>) query.getResultList();
for(DBTest p : arrayList)
{
System.out.println(p);
}
}
tx.commit();
}
}
Folder Structure
JavaProject
|---src
|--- package
|--- DBTest.java
|--- package
|--- META-INF
|--- MANIFEST.MF
|--- persistence.xml
|--- jndi.properties
I'm trying to create a test for a file that's using a jdbc resource. Regular tests work fine throughout the project, except for when I'm trying to test something that is using an entity manager. I think I'm missing something simple here and would appreciate any help.
Here's the error.
Feb 27, 2012 3:04:44 PM com.sun.enterprise.v3.server.ApplicationLifecycle deploy
SEVERE: javax.naming.NamingException: Lookup failed for 'jdbc/foundation' in SerialContext[myEnv={com.sun.enterprise.connectors.jndisuffix=__pm, java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl, java.naming.factory.url.pkgs=com.sun.enterprise.naming} [Root exception is javax.naming.NameNotFoundException: foundation not found]
java.lang.RuntimeException: javax.naming.NamingException: Lookup failed for 'jdbc/foundation' in SerialContext[myEnv={com.sun.enterprise.connectors.jndisuffix=__pm, java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl, java.naming.factory.url.pkgs=com.sun.enterprise.naming} [Root exception is javax.naming.NameNotFoundException: foundation not found]
Here's some of the troubleshooting steps I've taken:
Added the glassfish extras to the maven POM
I have placed the persistence file in both the /main/resources and /test/resources folders.
I have tried adding properties to the context object in the #BeforeClass method in the DonationsFacadeTest file along with about a million other configurations similar to the one below.
Environment Info:
Using Netbeans 7.0.1
Maven Project
Glassfish 3.1
DonationsFacade.java - This class is using a facade pattern to provide indirect access to JPA entities.
#Stateless
public class DonationsFacade extends AbstractFacade<Donations> {
#PersistenceContext(unitName = "FoundationPU")
private EntityManager em;
protected EntityManager getEntityManager() {
return em;
}
public DonationsFacade() {
super(Donations.class);
}
public boolean setPaid(int id, String transId)
{
try{
Donations don = em.find(Donations.class, id);
don.setStatus("Paid");
don.setConfirmationnumber(transId);
em.persist(don);
em.flush();
return true;
}
catch(Exception ex)
{
return false;
}
}
Test File - Just trying to write a simple test to to verify the data.
public class DonationsFacadeTest {
#Test
public void testSetPaid() throws Exception {
int id = 1;
String transId = "123";
EJBContainer ejbC = EJBContainer.createEJBContainer();
Context ctx = ejbC.getContext();
DonationsFacade instance = (DonationsFacade)ctx.lookup("java:global/classes/DonationsFacade");
boolean expResult = false;
boolean result = instance.setPaid(id, transId);
assertEquals(expResult, result);
ejbC.close();
}
}
persistence.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence"...>
<persistence-unit name="FoundationPU" transaction-type="JTA">
<jta-data-source>jdbc/foundation</jta-data-source>
<properties/>
</persistence-unit>
</persistence>
glassfish-resources.xml
<resources>
<jdbc-resource enabled="true" jndi-name="jdbc/foundation" object-type="user" pool-name="mysql_foundation_rootPool">
<description/>
</jdbc-resource>
<jdbc-connection-pool allow-non-component-callers="false"
associate-with-thread="false"
connection-creation-retry-attempts="0"
connection-creation-retry-interval-in-seconds="10"
connection-leak-reclaim="false"
connection-leak-timeout-in-seconds="0"
connection-validation-method="table"
datasource-classname="com.mysql.jdbc.jdbc2.optional.MysqlDataSource"
fail-all-connections="false" idle-timeout-in-seconds="300"
is-connection-validation-required="false"
is-isolation-level-guaranteed="true"
lazy-connection-association="false"
lazy-connection-enlistment="false"
match-connections="false"
max-connection-usage-count="0"
max-pool-size="32"
max-wait-time-in-millis="60000"
name="connectionPool"
non-transactional-connections="false"
ping="false"
pool-resize-quantity="2"
pooling="true"
res-type="javax.sql.DataSource"
statement-cache-size="0"
statement-leak-reclaim="false"
statement-leak-timeout-in-seconds="0"
statement-timeout-in-seconds="-1"
steady-pool-size="8"
validate-atmost-once-period-in-seconds="0"
wrap-jdbc-objects="true">
<property name="URL" value="jdbc:mysql://localhost:3306/foundation"/>
<property name="User" value="root"/>
<property name="Password" value="thepassword"/>
</jdbc-connection-pool>
</resources>
Again, thanks for the help, very much appreciated.
Figured out the answer here. I basically injected a entitymanager into the class. Hopefully this is helpful to someone who is trying to do this same thing.
public class DonationsFacadeTest {
private EntityManager em;
private EntityTransaction tx;
DonationsFacade donations;
public DonationsFacadeTest() {
}
#Before
public void setUpClass() throws Exception {
EntityManagerFactory emf = Persistence.createEntityManagerFactory("Foundation2");
em = emf.createEntityManager();
tx = em.getTransaction();
this.donations = new DonationsFacade();
this.donations.em = em;
}
/**
* Test of setPaid method, of class DonationsFacade.
*/
#Test
public void testSetPaid() throws Exception {
int id = 1;
String transId = "123";
boolean expResult = false;
boolean result = donations.setPaid(id, transId);
assertEquals(expResult, result);
}
}
Modified the persistence.xml file appropriately.
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" ... >
<persistence-unit name="Foundation2" transaction-type="RESOURCE_LOCAL">
<class>org.scmc.foundation.session.DonationsFacadeTest</class>
<exclude-unlisted-classes>true</exclude-unlisted-classes>
<properties>
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/foundation"/>
<property name="javax.persistence.jdbc.user" value="root"/>
<property name="javax.persistence.jdbc.password" value="password"/>
</properties>
</persistence-unit>
And finally added the appropriate driver to the POM file.
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.18</version>
</dependency>