container/modules/groupcom/test/java/org/apache/catalina/tribes/test/membership/TestTcpFailureDetector.java

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> 
 * 
 * <p>Description: </p> 
 * 
 * <p>Copyright: Copyright (c) 2005</p> 
 * 
 * <p>Company: </p>
 * 
 * @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]");
                }
            }
        }
        
    }

}