Tomcat example source code file (ChannelCreator.java)

This example Tomcat source code file (ChannelCreator.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

arraylist, domainfilterinterceptor, fragmentationinterceptor, fragmentationinterceptor, orderinterceptor, properties, replicationtransmitter, staticmembershipinterceptor, string, string, stringbuffer, stringbuffer, tcpfailuredetector, tcpfailuredetector, util

The Tomcat ChannelCreator.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.demos;

import java.util.Iterator;
import java.util.Properties;

import org.apache.catalina.tribes.Channel;
import org.apache.catalina.tribes.ManagedChannel;
import org.apache.catalina.tribes.group.GroupChannel;
import org.apache.catalina.tribes.group.interceptors.FragmentationInterceptor;
import org.apache.catalina.tribes.group.interceptors.GzipInterceptor;
import org.apache.catalina.tribes.group.interceptors.MessageDispatchInterceptor;
import org.apache.catalina.tribes.group.interceptors.OrderInterceptor;
import org.apache.catalina.tribes.membership.McastService;
import org.apache.catalina.tribes.transport.MultiPointSender;
import org.apache.catalina.tribes.transport.ReceiverBase;
import org.apache.catalina.tribes.transport.ReplicationTransmitter;
import org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor;
import org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor;
import org.apache.catalina.tribes.group.interceptors.TcpFailureDetector;
import org.apache.catalina.tribes.group.interceptors.DomainFilterInterceptor;
import java.util.ArrayList;
import org.apache.catalina.tribes.membership.MemberImpl;
import org.apache.catalina.tribes.group.interceptors.StaticMembershipInterceptor;
import org.apache.catalina.tribes.Member;

/**
 * <p>Title: 

 *
 * <p>Description: 

 *
 *
 * <p>Company: 

 *
 * @author fhanik
 * @version 1.0
 */
public class ChannelCreator {
    
    
    public static StringBuffer usage() {
        StringBuffer buf = new StringBuffer();
        buf.append("\n\t\t[-bind tcpbindaddress]")
           .append("\n\t\t[-tcpselto tcpselectortimeout]") 
           .append("\n\t\t[-tcpthreads tcpthreadcount]") 
           .append("\n\t\t[-port tcplistenport]")
           .append("\n\t\t[-autobind tcpbindtryrange]")
           .append("\n\t\t[-ackto acktimeout]") 
           .append("\n\t\t[-receiver org.apache.catalina.tribes.transport.nio.NioReceiver|org.apache.catalina.tribes.transport.bio.BioReceiver|]")
           .append("\n\t\t[-transport org.apache.catalina.tribes.transport.nio.PooledParallelSender|org.apache.catalina.tribes.transport.bio.PooledMultiSender]")
           .append("\n\t\t[-transport.xxx transport specific property]")
           .append("\n\t\t[-maddr multicastaddr]")
           .append("\n\t\t[-mport multicastport]")
           .append("\n\t\t[-mbind multicastbindaddr]")
           .append("\n\t\t[-mfreq multicastfrequency]")
           .append("\n\t\t[-mdrop multicastdroptime]")
           .append("\n\t\t[-gzip]")
           .append("\n\t\t[-static hostname:port (-static localhost:9999 -static 127.0.0.1:8888 can be repeated)]")
           .append("\n\t\t[-order]")
           .append("\n\t\t[-ordersize maxorderqueuesize]")
           .append("\n\t\t[-frag]")
           .append("\n\t\t[-fragsize maxmsgsize]")
           .append("\n\t\t[-throughput]")
           .append("\n\t\t[-failuredetect]")
           .append("\n\t\t[-async]")
           .append("\n\t\t[-asyncsize maxqueuesizeinkilobytes]");
       return buf;

    }

    public static Channel createChannel(String[] args) throws Exception {
        String bind = "auto";
        int port = 4001;
        String mbind = null;
        boolean gzip = false;
        int tcpseltimeout = 5000;
        int tcpthreadcount = 4;
        int acktimeout = 15000;
        String mcastaddr = "228.0.0.5";
        int mcastport = 45565;
        long mcastfreq = 500;
        long mcastdrop = 2000;
        boolean order = false;
        int ordersize = Integer.MAX_VALUE;
        boolean frag = false;
        int fragsize = 1024;
        int autoBind = 10;
        ArrayList staticMembers = new ArrayList();
        Properties transportProperties = new Properties();
        String transport = "org.apache.catalina.tribes.transport.nio.PooledParallelSender";
        String receiver = "org.apache.catalina.tribes.transport.nio.NioReceiver";
        boolean async = false;
        int asyncsize = 1024*1024*50; //50MB
        boolean throughput = false;
        boolean failuredetect = false;
        
        for (int i = 0; i < args.length; i++) {
            if ("-bind".equals(args[i])) {
                bind = args[++i];
            } else if ("-port".equals(args[i])) {
                port = Integer.parseInt(args[++i]);
            } else if ("-autobind".equals(args[i])) {
                autoBind = Integer.parseInt(args[++i]);
            } else if ("-tcpselto".equals(args[i])) {
                tcpseltimeout = Integer.parseInt(args[++i]);
            } else if ("-tcpthreads".equals(args[i])) {
                tcpthreadcount = Integer.parseInt(args[++i]);
            } else if ("-gzip".equals(args[i])) {
                gzip = true;
            } else if ("-async".equals(args[i])) {
                async = true;
            } else if ("-failuredetect".equals(args[i])) {
                failuredetect = true;
            } else if ("-asyncsize".equals(args[i])) {
                asyncsize = Integer.parseInt(args[++i]);
                System.out.println("Setting MessageDispatchInterceptor.maxQueueSize="+asyncsize);
            } else if ("-static".equals(args[i])) {
                String d = args[++i];
                String h = d.substring(0,d.indexOf(":"));
                String p = d.substring(h.length()+1);
                MemberImpl m = new MemberImpl(h,Integer.parseInt(p),2000);
                staticMembers.add(m);
            } else if ("-throughput".equals(args[i])) {
                throughput = true;
            } else if ("-order".equals(args[i])) {
                order = true;
            } else if ("-ordersize".equals(args[i])) {
                ordersize = Integer.parseInt(args[++i]);
                System.out.println("Setting OrderInterceptor.maxQueue="+ordersize);
            } else if ("-frag".equals(args[i])) {
                frag = true;
            } else if ("-fragsize".equals(args[i])) {
                fragsize = Integer.parseInt(args[++i]);
                System.out.println("Setting FragmentationInterceptor.maxSize="+fragsize);
            } else if ("-ackto".equals(args[i])) {
                acktimeout = Integer.parseInt(args[++i]);
            } else if ("-transport".equals(args[i])) {
                transport = args[++i];
            } else if (args[i]!=null && args[i].startsWith("transport.")) {
                String key = args[i];
                String val = args[++i];
                transportProperties.setProperty(key,val);
            } else if ("-receiver".equals(args[i])) {
                receiver = args[++i];
            } else if ("-maddr".equals(args[i])) {
                mcastaddr = args[++i];
            } else if ("-mport".equals(args[i])) {
                mcastport = Integer.parseInt(args[++i]);
            } else if ("-mfreq".equals(args[i])) {
                mcastfreq = Long.parseLong(args[++i]);
            } else if ("-mdrop".equals(args[i])) {
                mcastdrop = Long.parseLong(args[++i]);
            } else if ("-mbind".equals(args[i])) {
                mbind = args[++i];
            }
        }
        
        System.out.println("Creating receiver class="+receiver);
        Class cl = Class.forName(receiver,true,ChannelCreator.class.getClassLoader());
        ReceiverBase rx = (ReceiverBase)cl.newInstance();
        rx.setTcpListenAddress(bind);
        rx.setTcpListenPort(port);
        rx.setTcpSelectorTimeout(tcpseltimeout);
        rx.setTcpThreadCount(tcpthreadcount);
        rx.getBind();
        rx.setRxBufSize(43800);
        rx.setTxBufSize(25188);
        rx.setAutoBind(autoBind);

        
        ReplicationTransmitter ps = new ReplicationTransmitter();
        System.out.println("Creating transport class="+transport);
        MultiPointSender sender = (MultiPointSender)Class.forName(transport,true,ChannelCreator.class.getClassLoader()).newInstance();
        sender.setTimeout(acktimeout);
        sender.setMaxRetryAttempts(2);
        sender.setRxBufSize(43800);
        sender.setTxBufSize(25188);

        Iterator i = transportProperties.keySet().iterator();
        while ( i.hasNext() ) {
            String key = (String)i.next();
            IntrospectionUtils.setProperty(sender,key,transportProperties.getProperty(key));
        }
        ps.setTransport(sender);

        McastService service = new McastService();
        service.setMcastAddr(mcastaddr);
        if (mbind != null) service.setMcastBindAddress(mbind);
        service.setMcastFrequency(mcastfreq);
        service.setMcastDropTime(mcastdrop);
        service.setMcastPort(mcastport);

        ManagedChannel channel = new GroupChannel();
        channel.setChannelReceiver(rx);
        channel.setChannelSender(ps);
        channel.setMembershipService(service);
        
        if ( throughput ) channel.addInterceptor(new ThroughputInterceptor());
        if (gzip) channel.addInterceptor(new GzipInterceptor());
        if ( frag ) {
            FragmentationInterceptor fi = new FragmentationInterceptor();
            fi.setMaxSize(fragsize);
            channel.addInterceptor(fi);
        }
        if (order) {
            OrderInterceptor oi = new OrderInterceptor();
            oi.setMaxQueue(ordersize);
            channel.addInterceptor(oi);
        }
        
        if ( async ) {
            MessageDispatchInterceptor mi = new MessageDispatch15Interceptor();
            mi.setMaxQueueSize(asyncsize);
            channel.addInterceptor(mi);
            System.out.println("Added MessageDispatchInterceptor");
        }
        
        if ( failuredetect ) {
            TcpFailureDetector tcpfi = new TcpFailureDetector();
            channel.addInterceptor(tcpfi);
        }
        if ( staticMembers.size() > 0 ) {
            StaticMembershipInterceptor smi = new StaticMembershipInterceptor();
            for (int x=0; x<staticMembers.size(); x++ ) {
                smi.addStaticMember((Member)staticMembers.get(x));
            }
            channel.addInterceptor(smi);
        }


        byte[] domain = new byte[] {1,2,3,4,5,6,7,8,9,0};
        ((McastService)channel.getMembershipService()).setDomain(domain);
        DomainFilterInterceptor filter = new DomainFilterInterceptor();
        filter.setDomain(domain);
        channel.addInterceptor(filter);
        return channel;
    }

}