001// Copyright 2011, 2014 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.jpa;
016
017import java.util.HashMap;
018import java.util.Map;
019
020import javax.persistence.EntityManager;
021import javax.persistence.PersistenceContext;
022
023import org.apache.tapestry5.jpa.EntityManagerManager;
024import org.apache.tapestry5.jpa.EntityTransactionManager;
025import org.apache.tapestry5.jpa.annotations.CommitAfter;
026import org.apache.tapestry5.model.MutableComponentModel;
027import org.apache.tapestry5.plastic.MethodAdvice;
028import org.apache.tapestry5.plastic.PlasticClass;
029import org.apache.tapestry5.plastic.PlasticMethod;
030import org.apache.tapestry5.services.transform.ComponentClassTransformWorker2;
031import org.apache.tapestry5.services.transform.TransformationSupport;
032
033public class CommitAfterWorker implements ComponentClassTransformWorker2
034{
035    private final Map<String, MethodAdvice> methodAdvices;
036
037    public CommitAfterWorker(EntityManagerManager manager,
038            EntityTransactionManager transactionManager)
039    {
040        methodAdvices = new HashMap<>(manager.getEntityManagers().size());
041        for (Map.Entry<String, EntityManager> entry : manager.getEntityManagers().entrySet())
042            methodAdvices.put(entry.getKey(),
043                    new CommitAfterMethodAdvice(transactionManager, entry.getKey()));
044        methodAdvices.put(null, new CommitAfterMethodAdvice(transactionManager, null));
045    }
046
047    @Override
048    public void transform(PlasticClass plasticClass, TransformationSupport support,
049            MutableComponentModel model)
050    {
051        for (final PlasticMethod method : plasticClass.getMethodsWithAnnotation(CommitAfter.class))
052        {
053            PersistenceContext annotation = method.getAnnotation(PersistenceContext.class);
054
055            method.addAdvice(methodAdvices.get(annotation == null ? null : annotation.unitName()));
056        }
057    }
058}