Tomcat example source code file (TestTcpFailureDetector.java)

This example Tomcat source code file (TestTcpFailureDetector.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, ascii, bytemessage, channel-1, channelexception, exception, exception, expecting, expecting, groupchannel, tcpfailuredetector, tcpfailuredetector, testmbrlistener, testmbrlistener, util

The Tomcat TestTcpFailureDetector.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.test.membership;

import java.util.ArrayList;

import org.apache.catalina.tribes.ByteMessage;
import org.apache.catalina.tribes.Channel;
import org.apache.catalina.tribes.ChannelException;
import org.apache.catalina.tribes.ManagedChannel;
import org.apache.catalina.tribes.Member;
import org.apache.catalina.tribes.MembershipListener;
import org.apache.catalina.tribes.group.GroupChannel;
import org.apache.catalina.tribes.group.interceptors.TcpFailureDetector;
import junit.framework.TestCase;

/**
 * <p>Title: 
 
 * 
 * <p>Description: 
 
 * 
 * <p>Company: 

 * 
 * @author not attributable
 * @version 1.0
 */
public class TestTcpFailureDetector extends TestCase {
    private TcpFailureDetector tcpFailureDetector1 = null;
    private TcpFailureDetector tcpFailureDetector2 = null;
    private ManagedChannel channel1 = null;
    private ManagedChannel channel2 = null;
    private TestMbrListener mbrlist1 = null;
    private TestMbrListener mbrlist2 = null;
    protected void setUp() throws Exception {
        super.setUp();
        channel1 = new GroupChannel();
        channel2 = new GroupChannel();
        channel1.getMembershipService().setPayload("Channel-1".getBytes("ASCII"));
        channel2.getMembershipService().setPayload("Channel-2".getBytes("ASCII"));
        mbrlist1 = new TestMbrListener("Channel-1");
        mbrlist2 = new TestMbrListener("Channel-2");
        tcpFailureDetector1 = new TcpFailureDetector();
        tcpFailureDetector2 = new TcpFailureDetector();
        channel1.addInterceptor(tcpFailureDetector1);
        channel2.addInterceptor(tcpFailureDetector2);
        channel1.addMembershipListener(mbrlist1);
        channel2.addMembershipListener(mbrlist2);
    }
    
    public void clear() {
        mbrlist1.members.clear();
        mbrlist2.members.clear();
    }
    
    public void testTcpSendFailureMemberDrop() throws Exception {
        System.out.println("testTcpSendFailureMemberDrop()");
        clear();
        channel1.start(channel1.DEFAULT);
        channel2.start(channel2.DEFAULT);
        //Thread.sleep(1000);
        assertEquals("Expecting member count to be equal",mbrlist1.members.size(),mbrlist2.members.size());
        channel2.stop(channel2.SND_RX_SEQ);
        ByteMessage msg = new ByteMessage(new byte[1024]);
        try {
            channel1.send(channel1.getMembers(), msg, 0);
            assertEquals("Message send should have failed.",true,false);
        } catch ( ChannelException x ) {
            
        }
        assertEquals("Expecting member count to not be equal",mbrlist1.members.size()+1,mbrlist2.members.size());
        channel1.stop(Channel.DEFAULT);
        channel2.stop(Channel.DEFAULT);
    }
    
    public void testTcpFailureMemberAdd() throws Exception {
        System.out.println("testTcpFailureMemberAdd()");
        clear();
        channel1.start(channel1.DEFAULT);
        channel2.start(channel2.SND_RX_SEQ);
        channel2.start(channel2.SND_TX_SEQ);
        channel2.start(channel2.MBR_RX_SEQ);
        channel2.stop(channel2.SND_RX_SEQ);
        channel2.start(channel2.MBR_TX_SEQ);
        //Thread.sleep(1000);
        assertEquals("Expecting member count to not be equal",mbrlist1.members.size()+1,mbrlist2.members.size());
        channel1.stop(Channel.DEFAULT);
        channel2.stop(Channel.DEFAULT);
    }

    public void testTcpMcastFail() throws Exception {
        System.out.println("testTcpMcastFail()");
        clear();
        channel1.start(channel1.DEFAULT);
        channel2.start(channel2.DEFAULT);
        //Thread.sleep(1000);
        assertEquals("Expecting member count to be equal",mbrlist1.members.size(),mbrlist2.members.size());
        channel2.stop(channel2.MBR_TX_SEQ);
        ByteMessage msg = new ByteMessage(new byte[1024]);
        try {
            Thread.sleep(5000);
            assertEquals("Expecting member count to be equal",mbrlist1.members.size(),mbrlist2.members.size());
            channel1.send(channel1.getMembers(), msg, 0);
        } catch ( ChannelException x ) {
            assertEquals("Message send should have succeeded.",true,false);
        }
        channel1.stop(Channel.DEFAULT);
        channel2.stop(Channel.DEFAULT);
    }


    protected void tearDown() throws Exception {
        tcpFailureDetector1 = null;
        tcpFailureDetector2 = null;
        try { channel1.stop(Channel.DEFAULT);}catch (Exception ignore){}
        channel1 = null;
        try { channel2.stop(Channel.DEFAULT);}catch (Exception ignore){}
        channel2 = null;
        super.tearDown();
    }
    
    public class TestMbrListener implements MembershipListener {
        public String name = null;
        public TestMbrListener(String name) {
            this.name = name;
        }
        public ArrayList members = new ArrayList();
        public void memberAdded(Member member) {
            if ( !members.contains(member) ) {
                members.add(member);
                try{
                    System.out.println(name + ":member added[" + new String(member.getPayload(), "ASCII") + "]");
                }catch ( Exception x ) {
                    System.out.println(name + ":member added[unknown]");
                }
            }
        }
        
        public void memberDisappeared(Member member) {
            if ( members.contains(member) ) {
                members.remove(member);
                try{
                    System.out.println(name + ":member disappeared[" + new String(member.getPayload(), "ASCII") + "]");
                }catch ( Exception x ) {
                    System.out.println(name + ":member disappeared[unknown]");
                }
            }
        }
        
    }

}