    001// Copyright 2009, 2011 The Apache Software Foundation
    002//
    003// Licensed under the Apache License, Version 2.0 (the "License");
    004// you may not use this file except in compliance with the License.
    005// You may obtain a copy of the License at
    006//
    007//     http://www.apache.org/licenses/LICENSE-2.0
    008//
    009// Unless required by applicable law or agreed to in writing, software
    010// distributed under the License is distributed on an "AS IS" BASIS,
    011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012// See the License for the specific language governing permissions and
    013// limitations under the License.
    014
    015package org.apache.tapestry5.internal.hibernate;
    016
    017import org.apache.tapestry5.hibernate.HibernateSessionManager;
    018import org.apache.tapestry5.hibernate.HibernateTransactionAdvisor;
    019import org.apache.tapestry5.hibernate.annotations.CommitAfter;
    020import org.apache.tapestry5.ioc.MethodAdviceReceiver;
    021import org.apache.tapestry5.plastic.MethodAdvice;
    022import org.apache.tapestry5.plastic.MethodInvocation;
    023
    024import java.lang.reflect.Method;
    025
    026public class HibernateTransactionAdvisorImpl implements HibernateTransactionAdvisor
    027{
    028    private final HibernateSessionManager manager;
    029
    030    /**
    031     * The rules for advice are the same for any method: commit on success or checked exception, abort on thrown
    032     * exception ... so we can use a single shared advice object.
    033     */
    034    private final MethodAdvice advice = new MethodAdvice()
    035    {
    036        @Override
    037        public void advise(MethodInvocation invocation)
    038        {
    039            try
    040            {
    041                invocation.proceed();
    042            }
    043            catch (RuntimeException ex)
    044            {
    045                manager.abort();
    046
    047                throw ex;
    048            }
    049
    050            // For success or checked exception, commit the transaction.
    051
    052            manager.commit();
    053        }
    054    };
    055
    056    public HibernateTransactionAdvisorImpl(HibernateSessionManager manager)
    057    {
    058        this.manager = manager;
    059    }
    060
    061    @Override
    062    public void addTransactionCommitAdvice(MethodAdviceReceiver receiver)
    063    {
    064        for (Method m : receiver.getInterface().getMethods())
    065        {
    066            if (m.getAnnotation(CommitAfter.class) != null)
    067            {
    068                receiver.adviseMethod(m, advice);
    069            }
    070        }
    071    }
    072}