Spring4 + and Hibernate 4 Transactions - spring

Question

Using spring 4.0.6.RELEASE, Hibernate 4.3.6.Final and hsqldb 2.3.2. My integration test looks like the following;
#Test(expected = DataIntegrityViolationException.class)
public final void testDuplicateItems() {
final ServerEntity serverEntity1 = new ServerEntity("DuplicateItem");
opService.save(serverEntity1);
opService.save(serverEntity1);
}
This works as expected. However, when I run my standalone java component i can save the first item, the second item which is a duplicate is not saved but Im unable to catch the exception. Here is the log file
WARN org.hibernate.engine.jdbc.spi.SqlExceptionHelper: SQL Error: -104, SQLState: 23505
2014-08-27 14:52:06,843 ERROR org.hibernate.engine.jdbc.spi.SqlExceptionHelper: integrity constraint violation: unique constraint or index violation; UK_NFU7LXMMDFVIR1WD08662085N table: SERVERENTITY
[WARNING]
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:293)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.dao.DataIntegrityViolationException: could not execute statement; SQL [n/a]; constraint [UK_NFU7LXMMDFVIR1WD08662085N]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement
at org.springframework.orm.hibernate4.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:161)
at org.springframework.orm.hibernate4.HibernateTransactionManager.convertHibernateAccessException(HibernateTransactionManager.java:681)
at org.springframework.orm.hibernate4.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:563)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:757)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:726)
at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:478)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:272)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
at com.sun.proxy.$Proxy38.execute(Unknown Source)
at com.opserver.simpleapp.MainApp.start(MainApp.java:60)
at com.opserver.simpleapp.MainApp.main(MainApp.java:37)
... 6 more
Both the service and dao implementations have #Transactional at class level. I've a component class that is calling the service class, this component class is not transactional! The component class prints a response, does the session need to be flushed here?
Need to figure out why the save method in the dao is not throwing the exception, I can actually see it an id being created and then rolled back.
J
My component class is very basic;
boolean isValid = opServerService.loadXMLFile("Server.xml");
try{
if (isValid) {
System.out.println("Entity has been added");
} else {
System.out.println("Entity has not been added");
}
}catch (Exception ex){
System.out.println("that was a focked up");
}
The problem is that "Entity has been added" gets printed to console and then I see the above error in console.
DAO looks like this
#Override
#Transactional
public final void save(final ServerEntity serverEntity) throws DataIntegrityViolationException {
LOGGER.debug(">>start(serverEntity=" + serverEntity + ")");
Preconditions.checkNotNull(serverEntity);
this.getCurrentSession().save(serverEntity);
}
Service method with #Transactional at class level, looks like this
#Override
public final void save(ServerEntity serverEntity) {
opServerDao.save(serverEntity);
}
And Component looks like this
#Component
public class AddCommand implements Command {
#Autowired
OpService opService;
public AddServerCommand() {
super();
}
#Override
public void execute(String[] options) {
try{
boolean isValid = opService.save("Server.xml");
if (isValid) {
System.out.println("Entity has been added");
} else {
System.out.println("Entity has not been added");
}
}catch (Exception ex){
System.out.println("Exception found");
}
}
}

Answer 1

You should catch your exception in the component that's calling the service.

Answer 2

Found the solution, was missing from the applicationContext.xml. The wrapped try/catch around the opService now catches the exception. Need to implement my own custom exception handler but for now at least I know the component class is handling the exception which is being thrown from the service class.
Thanks for your help.
J