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Tomcat example source code file (MultipointBioSender.java)

This example Tomcat source code file (MultipointBioSender.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Tomcat tags/keywords

biosender, biosender, channelexception, channelexception, channelmessage, exception, exception, hashmap, io, ioexception, member, member, multipointbiosender, multipointsender, object, util

The Tomcat MultipointBioSender.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.catalina.tribes.transport.bio;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import org.apache.catalina.tribes.ChannelException;
import org.apache.catalina.tribes.ChannelMessage;
import org.apache.catalina.tribes.Member;
import org.apache.catalina.tribes.io.ChannelData;
import org.apache.catalina.tribes.io.XByteBuffer;
import org.apache.catalina.tribes.transport.MultiPointSender;
import org.apache.catalina.tribes.transport.AbstractSender;
import org.apache.catalina.tribes.Channel;

/**
 *
 * @author Filip Hanik
 * @version $Revision: 532800 $ $Date: 2007-04-26 18:52:29 +0200 (jeu., 26 avr. 2007) $
 *
 */
public class MultipointBioSender extends AbstractSender implements MultiPointSender {
    public MultipointBioSender() {
    }
    
    protected long selectTimeout = 1000; 
    protected HashMap bioSenders = new HashMap();

    public synchronized void sendMessage(Member[] destination, ChannelMessage msg) throws ChannelException {
        byte[] data = XByteBuffer.createDataPackage((ChannelData)msg);
        BioSender[] senders = setupForSend(destination);
        ChannelException cx = null;
        for ( int i=0; i<senders.length; i++ ) {
            try {
                senders[i].sendMessage(data,(msg.getOptions()&Channel.SEND_OPTIONS_USE_ACK)==Channel.SEND_OPTIONS_USE_ACK);
            } catch (Exception x) {
                if (cx == null) cx = new ChannelException(x);
                cx.addFaultyMember(destination[i],x);
            }
        }
        if (cx!=null ) throw cx;
    }



    protected BioSender[] setupForSend(Member[] destination) throws ChannelException {
        ChannelException cx = null;
        BioSender[] result = new BioSender[destination.length];
        for ( int i=0; i<destination.length; i++ ) {
            try {
                BioSender sender = (BioSender) bioSenders.get(destination[i]);
                if (sender == null) {
                    sender = new BioSender();
                    sender.transferProperties(this,sender);
                    sender.setDestination(destination[i]);
                    bioSenders.put(destination[i], sender);
                }
                result[i] = sender;
                if (!result[i].isConnected() ) result[i].connect();
                result[i].keepalive();
            }catch (Exception x ) {
                if ( cx== null ) cx = new ChannelException(x);
                cx.addFaultyMember(destination[i],x);
            }
        }
        if ( cx!=null ) throw cx;
        else return result;
    }

    public void connect() throws IOException {
        //do nothing, we connect on demand
        setConnected(true);
    }


    private synchronized void close() throws ChannelException  {
        ChannelException x = null;
        Object[] members = bioSenders.keySet().toArray();
        for (int i=0; i<members.length; i++ ) {
            Member mbr = (Member)members[i];
            try {
                BioSender sender = (BioSender)bioSenders.get(mbr);
                sender.disconnect();
            }catch ( Exception e ) {
                if ( x == null ) x = new ChannelException(e);
                x.addFaultyMember(mbr,e);
            }
            bioSenders.remove(mbr);
        }
        if ( x != null ) throw x;
    }

    public void add(Member member) {

    }

    public void remove(Member member) {
        //disconnect senders
        BioSender sender = (BioSender)bioSenders.remove(member);
        if ( sender != null ) sender.disconnect();
    }


    public synchronized void disconnect() {
        try {close(); }catch (Exception x){}
        setConnected(false);
    }

    public void finalize() {
        try {disconnect(); }catch ( Exception ignore){}
    }


    public boolean keepalive() {
        //throw new UnsupportedOperationException("Method ParallelBioSender.checkKeepAlive() not implemented");
        boolean result = false;
        Map.Entry[] entries = (Map.Entry[])bioSenders.entrySet().toArray(new Map.Entry[bioSenders.size()]);
        for ( int i=0; i<entries.length; i++ ) {
            BioSender sender = (BioSender)entries[i].getValue();
            if ( sender.keepalive() ) {
                bioSenders.remove(entries[i].getKey());
            }
        }
        return result;
    }

}

Other Tomcat examples (source code examples)

Here is a short list of links related to this Tomcat MultipointBioSender.java source code file:

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