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}