br.com.blackhouse.internet.bindings.intercept.TransactionalInterceptor.java Source code

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Here is the source code for br.com.blackhouse.internet.bindings.intercept.TransactionalInterceptor.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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 br.com.blackhouse.internet.bindings.intercept;

import javax.inject.Inject;
import javax.interceptor.AroundInvoke;
import javax.interceptor.Interceptor;
import javax.interceptor.InvocationContext;
import javax.persistence.EntityManager;
import javax.persistence.EntityTransaction;

import org.apache.commons.logging.Log;

import br.com.blackhouse.internet.bindings.ApplicationLog;
import br.com.blackhouse.internet.bindings.EntityManagerQualifier;

@Interceptor
@Transactional
public class TransactionalInterceptor {

    private @Inject @EntityManagerQualifier EntityManager entityManager;

    private @Inject @ApplicationLog Log logger;

    @AroundInvoke
    public Object invoke(InvocationContext context) throws Exception {
        EntityTransaction transaction = entityManager.getTransaction();

        try {
            if (!transaction.isActive()) {
                transaction.begin();
            }

            return context.proceed();

        } catch (Exception e) {
            logger.error("Exception in transactional method call", e);

            if (transaction != null) {
                transaction.rollback();
            }

            throw e;

        } finally {
            if (transaction != null && transaction.isActive()) {
                transaction.commit();
            }
        }

    }

}