/*
* Copyright 2016 Red Hat, Inc. and/or its affiliates
* and other contributors as indicated by the @author tags.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.keycloak.example.photoz.util;
import javax.enterprise.inject.Instance;
import javax.inject.Inject;
import javax.interceptor.AroundInvoke;
import javax.interceptor.Interceptor;
import javax.interceptor.InvocationContext;
import javax.persistence.EntityManager;
import javax.persistence.EntityTransaction;
/**
* @author <a href="mailto:psilva@redhat.com">Pedro Igor</a>
*/
@Interceptor
@Transaction
public class TransactionInterceptor {
@Inject
private Instance<EntityManager> entityManager;
@AroundInvoke
public Object aroundInvoke(InvocationContext context) {
EntityManager entityManager = this.entityManager.get();
EntityTransaction transaction = entityManager.getTransaction();
try {
transaction.begin();
Object proceed = context.proceed();
transaction.commit();
return proceed;
} catch (Exception cause) {
if (transaction != null && transaction.isActive()) {
transaction.rollback();
}
throw new RuntimeException(cause);
} finally {
entityManager.close();
}
}
}