@Override
public synchronized <T> T execute(Command<T> command) {
boolean transactionOwner = false;
T result = null;
try {
transactionOwner = txm.begin();
tpm.beginCommandScopedEntityManager();
TransactionManagerHelper.registerTransactionSyncInContainer(
this.txm, new TaskSynchronizationImpl(this));
result = executeNext((Command<T>) command);
postInit(result);
txm.commit(transactionOwner);
return result;
} catch (TaskException e) {
// allow to handle TaskException as business exceptions on caller side
// if transaction is owned by other component like process engine
if (transactionOwner) {
rollbackTransaction(e, transactionOwner);
e.setRecoverable(false);
throw e;
} else {
throw e;
}
} catch (RuntimeException re) {
rollbackTransaction(re, transactionOwner);
throw re;
} catch (Exception t1) {
rollbackTransaction(t1, transactionOwner);
throw new RuntimeException("Wrapped exception see cause", t1);
}
}
@Override
public Context getContext() {
final TaskPersistenceContext persistenceContext = tpm.getPersistenceContext();
persistenceContext.joinTransaction();
return new TaskContext() {
@Override
public void set(String identifier, Object value) {
txm.putResource(identifier, value);
}
@Override
public void remove(String identifier) {}
@Override
public String getName() {
return null;
}
@Override
public World getContextManager() {
return null;
}
@Override
public Object get(String identifier) {
return txm.getResource(identifier);
}
@Override
public void setPersistenceContext(TaskPersistenceContext context) {}
@Override
public TaskPersistenceContext getPersistenceContext() {
return persistenceContext;
}
@Override
public UserGroupCallback getUserGroupCallback() {
return null;
}
@Override
public Task loadTaskVariables(Task task) {
return task;
}
};
}