    001    //  Copyright 2008 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
    015    package org.apache.tapestry5.internal.services;
    016
    017    import org.apache.tapestry5.internal.events.EndOfRequestListener;
    018    import org.apache.tapestry5.ioc.internal.util.CollectionFactory;
    019    import org.apache.tapestry5.services.RequestGlobals;
    020
    021    import java.util.List;
    022
    023    public class EndOfRequestEventHubImpl implements EndOfRequestEventHub
    024    {
    025        private final RequestGlobals requestGlobals;
    026
    027        public EndOfRequestEventHubImpl(RequestGlobals requestGlobals) {
    028            this.requestGlobals = requestGlobals;
    029        }
    030
    031        private final List<EndOfRequestListener> listeners = CollectionFactory.newThreadSafeList();
    032
    033        public void addEndOfRequestListener(EndOfRequestListener listener)
    034        {
    035            listeners.add(listener);
    036        }
    037
    038        public void removeEndOfRequestListener(EndOfRequestListener listener)
    039        {
    040            listeners.remove(listener);
    041        }
    042
    043        public void fire()
    044        {
    045            // TAP5-986: do not fire if request is already cleaned up. Container may use the same thread for different dispatches
    046            if (requestGlobals.getRequest() == null) return;
    047            for (EndOfRequestListener l : listeners)
    048            {
    049                l.requestDidComplete();
    050            }
    051        }
    052    }