    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
    015package org.apache.tapestry5.internal.services;
    016
    017import org.apache.tapestry5.commons.util.CollectionFactory;
    018import org.apache.tapestry5.http.services.RequestGlobals;
    019import org.apache.tapestry5.internal.events.EndOfRequestListener;
    020
    021import java.util.List;
    022
    023public 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}