org.fabric3.fabric.channel.AbstractFanOutHandler Maven / Gradle / Ivy

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/*
 * Fabric3
 * Copyright (c) 2009-2011 Metaform Systems
 *
 * Fabric3 is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version, with the
 * following exception:
 *
 * Linking this software statically or dynamically with other
 * modules is making a combined work based on this software.
 * Thus, the terms and conditions of the GNU General Public
 * License cover the whole combination.
 *
 * As a special exception, the copyright holders of this software
 * give you permission to link this software with independent
 * modules to produce an executable, regardless of the license
 * terms of these independent modules, and to copy and distribute
 * the resulting executable under terms of your choice, provided
 * that you also meet, for each linked independent module, the
 * terms and conditions of the license of that module. An
 * independent module is a module which is not derived from or
 * based on this software. If you modify this software, you may
 * extend this exception to your version of the software, but
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 * delete this exception statement from your version.
 *
 * Fabric3 is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the
 * GNU General Public License along with Fabric3.
 * If not, see .
*/
package org.fabric3.fabric.channel;

import java.net.URI;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CopyOnWriteArrayList;

import org.fabric3.spi.channel.ChannelConnection;
import org.fabric3.spi.channel.EventStreamHandler;

/**
 * Base FanOutHandler functionality.
 *
 * @version $Rev: 8947 $ $Date: 2010-05-02 15:09:45 +0200 (Sun, 02 May 2010) $
 */
public abstract class AbstractFanOutHandler implements FanOutHandler {
    protected List connections = new CopyOnWriteArrayList();
    protected Map index = new HashMap();

    public synchronized void addConnection(URI uri, ChannelConnection connection) {
        connections.add(connection);
        index.put(uri, connection);
    }

    public synchronized ChannelConnection removeConnection(URI uri) {
        ChannelConnection connection = index.remove(uri);
        connections.remove(connection);
        return connection;
    }


    public void setNext(EventStreamHandler next) {
        throw new IllegalStateException("This handler must be the last one in the handler sequence");
    }

    public EventStreamHandler getNext() {
        return null;
    }

}