private Object executeImmutableTransaction(ManagedMethodSPI managedMethod, Object[] args) throws Throwable {
		Transaction transaction = transactionalResource.createReadOnlyTransaction();
		// see mutable transaction comment
		transactionalResource.storeSession(transaction.getSession());

		try {
			Object result = managedMethod.invoke(managedInstance, args);
			if (transaction.unused()) {
				log.debug("Method |%s| superfluously declared transactional.", managedMethod);
			}
			return result;
		} catch (Throwable throwable) {
			throw throwable(throwable, "Immutable transactional method |%s| invocation fail.", managedMethod);
		} finally {
			if (transaction.close()) {
				// see mutable transaction comment
				transactionalResource.releaseSession();
			}
		}
	}
private Object executeImmutableTransaction(ManagedMethodSPI managedMethod, Object[] args) throws Throwable {
		Transaction transaction = transactionalResource.createReadOnlyTransaction();
		
		transactionalResource.storeSession(transaction.getSession());

		try {
			Object result = managedMethod.invoke(managedInstance, args);
			if (transaction.unused()) {
				log.debug("Method |%s| superfluously declared transactional.", managedMethod);
			}
			return result;
		} catch (Throwable throwable) {
			throw throwable(throwable, "Immutable transactional method |%s| invocation fail.", managedMethod);
		} finally {
			if (transaction.close()) {
				
				transactionalResource.releaseSession();
			}
		}
	}
private Object executeImmutableTransaction ( ManagedMethodSPI managedMethod , Object [ ] args ) throws Throwable { Transaction transaction = transactionalResource . createReadOnlyTransaction ( ) ; // see mutable transaction comment
 transactionalResource . storeSession ( transaction . getSession ( ) ) ; try { Object result = managedMethod . invoke ( managedInstance , args ) ; if ( transaction . unused ( ) ) { log . debug ( "Method |%s| superfluously declared transactional." , managedMethod ) ; } return result ; } catch ( Throwable throwable ) { throw throwable ( throwable , "Immutable transactional method |%s| invocation fail." , managedMethod ) ; } finally { if ( transaction . close ( ) ) { // see mutable transaction comment
 transactionalResource . releaseSession ( ) ; } } }
Helper method for immutable transaction execution.

@param managedMethod managed method to be executed into transactional scope,
@param args managed method arguments.
@return value returned by managed method.
@throws Throwable forward any error rose by method execution.
Helper method for immutable transaction execution .