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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2009-2012 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
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 *
 * Modifications:
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package com.sun.enterprise.web.connector.grizzly.comet;

import com.sun.grizzly.comet.CometTask;
import java.io.IOException;
import java.util.Iterator;
import java.util.WeakHashMap;
import java.util.concurrent.ConcurrentHashMap;

/**
 * The main object used by {@link CometHandler}. 
 * The {@link CometContext} is always available for {@link CometHandler}
 * and can be used to invokeCometHandler other {@link CometHandler}.
 *
 * Attributes can be added/removed the same way HttpServletSession 
 * is doing. It is not recommended to use attributes if this 
 * {@link CometContext} is not shared amongs multiple
 * context path (uses HttpServletSession instead).
 *
 * @author Jeanfrancois Arcand
 * @deprecated use {@link CometContext}
 */
public class CometContext extends com.sun.grizzly.comet.CometContext {
    private final Object mapSync = new Object();
    private final WeakHashMap cometHandlerMap
            = new WeakHashMap();
    
    public CometContext(String contextTopic, int type) {
        super(contextTopic, type);
    }

    
    protected void setTopic(String topic) {
        this.topic = topic;
    }
    
    public int addCometHandler(CometHandler handler) {
        return addCometHandler(handler, false);
    }
    
    public int addCometHandler(CometHandler handler, boolean alreadySuspended) {
        return super.addCometHandler(wrapCometHandler(handler), alreadySuspended);
    }

    /**
     * Resume the Comet request and remove it from the active {@link CometHandler} list. Once resumed,
     * a CometHandler must never manipulate the HttpServletRequest or HttpServletResponse as
     * those object will be recycled and may be re-used to serve another request.
     *
     * If you cache them for later reuse by another thread there is a
     * possibility to introduce corrupted responses next time a request is made.
     * @param handler The CometHandler to resume.
     * @return true if the operation succeeded.
     */
    public void resumeCometHandler(CometHandler handler) {
        super.resumeCometHandler(wrapCometHandler(handler));
    }
    
    public void removeCometHandler(CometHandler handler) {
        removeCometHandler(handler, true);
    }

    public boolean removeCometHandler(CometHandler handler, boolean resume) {
        return super.removeCometHandler(wrapCometHandler(handler), resume);
    }

    ConcurrentHashMap getHandlers() {
        return handlers;
    }

    
    
    private com.sun.grizzly.comet.CometHandler wrapCometHandler(CometHandler handler) {
        synchronized(mapSync) {
            com.sun.grizzly.comet.CometHandler normalHandler = cometHandlerMap.get(handler);
            if (normalHandler == null) {
                normalHandler = new CometHandlerWrapper(handler);
            }
            
            return normalHandler;
        }
    }

    private static final class CometHandlerWrapper
            implements com.sun.grizzly.comet.CometHandler {
        
        private final CometHandler cometHandler;

        public CometHandlerWrapper(CometHandler cometHandler) {
            this.cometHandler = cometHandler;
        }
        
        public void attach(E attachment) {
            cometHandler.attach(attachment);
        }

        public void onEvent(com.sun.grizzly.comet.CometEvent event) throws IOException {
            cometHandler.onEvent(new CometEvent(event));
        }

        public void onInitialize(com.sun.grizzly.comet.CometEvent event) throws IOException {
            cometHandler.onInitialize(new CometEvent(event));
        }

        public void onTerminate(com.sun.grizzly.comet.CometEvent event) throws IOException {
            cometHandler.onTerminate(new CometEvent(event));
        }

        public void onInterrupt(com.sun.grizzly.comet.CometEvent event) throws IOException {
            cometHandler.onInterrupt(new CometEvent(event));
        }

        @Override
        public boolean equals(Object obj) {
            if (obj instanceof CometHandlerWrapper) {
                return cometHandler.equals(((CometHandlerWrapper) obj).cometHandler);
            }
            
            return cometHandler.equals(obj);
        }

        @Override
        public int hashCode() {
            return cometHandler.hashCode();
        }

        @Override
        public String toString() {
            return cometHandler.toString();
        }
    }
}