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

package org.apache.catalina.tribes.test.membership;

import java.util.ArrayList;

import org.apache.catalina.tribes.Channel;
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 junit.framework.TestCase;

public class TestMemberArrival
    extends TestCase {
    private static int count = 10;
    private ManagedChannel[] channels = new ManagedChannel[count];
    private TestMbrListener[] listeners = new TestMbrListener[count];

    protected void setUp() throws Exception {
        super.setUp();
        for (int i = 0; i < channels.length; i++) {
            channels[i] = new GroupChannel();
            channels[i].getMembershipService().setPayload( ("Channel-" + (i + 1)).getBytes("ASCII"));
            listeners[i] = new TestMbrListener( ("Listener-" + (i + 1)));
            channels[i].addMembershipListener(listeners[i]);

        }
    }

    public void clear() {
        for (int i = 0; i < channels.length; i++) {
            listeners[i].members.clear();
        }
    }

    public void testMemberArrival() throws Exception {
        //purpose of this test is to make sure that we have received all the members
        //that we can expect before the start method returns
        Thread[] threads = new Thread[channels.length];
        for (int i=0; i<channels.length; i++ ) {
            final Channel channel = channels[i];
            Thread t = new Thread() {
                public void run() {
                    try {
                        channel.start(Channel.DEFAULT);
                    }catch ( Exception x ) {
                        throw new RuntimeException(x);
                    }
                }
            };
            threads[i] = t;
        }
        for (int i=0; i<threads.length; i++ ) threads[i].start();
        for (int i=0; i<threads.length; i++ ) threads[i].join();
        System.out.println("All channels started.");
        for (int i=listeners.length-1; i>=0; i-- ) assertEquals("Checking member arrival length",channels.length-1,listeners[i].members.size());
    }

    protected void tearDown() throws Exception {

        for (int i = 0; i < channels.length; i++) {
            try {
                channels[i].stop(Channel.DEFAULT);
            } catch (Exception ignore) {}
        }
        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") + "; Thread:"+Thread.currentThread().getName()+"]");
                } 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") + "; Thread:"+Thread.currentThread().getName()+"]");
                } catch (Exception x) {
                    System.out.println(name + ":member disappeared[unknown]");
                }
            }
        }

    }

}