org.apache.deltaspike.jpa.api.transaction

Class TransactionHelper

java.lang.Object

org.apache.deltaspike.jpa.api.transaction.TransactionHelper

@ApplicationScoped
public class TransactionHelper
extends Object

This class allows to execute CDI-unmanaged code blocks in a @Transactional manner. This is handy if you like e.g. to execute database code in a unit test tearDown method.

Attention: please be aware that this helper only works for @Transactional with auto-detecting the EntityManager! If you need to manually specify the EntityManager Qualifier for another EntityManager, then you need to copy this code and adopt it.

Usage:

  SomeEntity retVal = TransactionHelper.getInstance().executeTransactional( new Callable() {
    private @Inject EntityManager em;
    public SomeEntity call() throws Exception {
      return em.find(entityId, SomeEntity.class);
    }
  } );
 

Constructor Summary

Constructors

Constructor and Description
TransactionHelper()

Method Summary

Modifier and Type	Method and Description
<T> T	executeTransactional(Callable<T> callable) Execute the given Callable in a Transitional manner.
static TransactionHelper	getInstance()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TransactionHelper

public TransactionHelper()

Method Detail

getInstance

public static TransactionHelper getInstance()

executeTransactional

@Transactional
public <T> T executeTransactional(Callable<T> callable)
                                          throws Exception

Execute the given Callable in a Transitional manner.

Type Parameters:

T - the return type of the executed Callable

Parameters:

callable - which will get executed in a @Transactional block

Returns:

the return value of the executed Callable

Throws:

Exception