package org.jgroups.tests;
import EDU.oswego.cs.dl.util.concurrent.CyclicBarrier;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import org.jgroups.Address;
import org.jgroups.JChannel;
import org.jgroups.View;
/**
* Tests concurrent leaves of all members of a channel
* @author Bela Ban
* @version $Id: DisconnectStressTest.java,v 1.2 2006/05/04 12:28:45 belaban Exp $
*/
public class DisconnectStressTest extends TestCase {
static CyclicBarrier all_disconnected=null;
static CyclicBarrier start_disconnecting=null;
static final int NUM=30;
static final long TIMEOUT=50000;
static final MyThread[] threads=new MyThread[NUM];
static String groupname="ConcurrentTestDemo";
static String props="UDP(mcast_addr=228.8.8.9;mcast_port=7788;ip_ttl=1;" +
"mcast_send_buf_size=150000;mcast_recv_buf_size=80000):" +
"PING(timeout=3000;num_initial_members=3):" +
"MERGE2(min_interval=3000;max_interval=5000):" +
"FD_SOCK:" +
"VERIFY_SUSPECT(timeout=1500):" +
"pbcast.NAKACK(gc_lag=50;retransmit_timeout=300,600,1200,2400,4800):" +
"UNICAST(timeout=300,600,1200,2400):" +
"pbcast.STABLE(desired_avg_gossip=5000):" +
"FRAG(frag_size=4096;down_thread=false;up_thread=false):" +
"pbcast.GMS(join_timeout=5000;join_retry_timeout=2000;" +
"shun=false;print_local_addr=false;view_ack_collection_timeout=5000;" +
"digest_timeout=0;merge_timeout=30000;handle_concurrent_startup=true)";
public DisconnectStressTest(String name) {
super(name);
}
static void log(String msg) {
System.out.println("-- [" + Thread.currentThread().getName() + "] " + msg);
}
public void testConcurrentStartupAndMerging() throws Exception {
all_disconnected=new CyclicBarrier(NUM+1);
start_disconnecting=new CyclicBarrier(NUM+1);
for(int i=0; i < threads.length; i++) {
threads[i]=new MyThread(i);
synchronized(threads[i]) {
threads[i].start();
threads[i].wait(20000);
}
}
log("DISCONNECTING");
start_disconnecting.barrier(); // causes all channels to disconnect
all_disconnected.barrier(); // notification when all threads have disconnected
}
public static class MyThread extends Thread {
int index=-1;
long total_connect_time=0, total_disconnect_time=0;
private JChannel ch=null;
private Address my_addr=null;
public MyThread(int i) {
super("thread #" + i);
index=i;
}
public void closeChannel() {
if(ch != null) {
ch.close();
}
}
public int numMembers() {
return ch.getView().size();
}
public void run() {
View view;
try {
ch=new JChannel(props);
log("connecting to channel");
long start=System.currentTimeMillis(), stop;
ch.connect(groupname);
stop=System.currentTimeMillis();
synchronized(this) {
this.notify();
}
total_connect_time=stop-start;
view=ch.getView();
my_addr=ch.getLocalAddress();
log(my_addr + " connected in " + total_connect_time + " msecs (" +
view.getMembers().size() + " members). VID=" + ch.getView());
start_disconnecting.barrier();
start=System.currentTimeMillis();
ch.disconnect();
stop=System.currentTimeMillis();
log(my_addr + " disconnected in " + (stop-start) + " msecs");
all_disconnected.barrier();
}
catch(Exception e) {
e.printStackTrace();
}
}
}
public static Test suite() {
return new TestSuite(DisconnectStressTest.class);
}
public static void main(String[] args) {
String[] testCaseName={DisconnectStressTest.class.getName()};
junit.textui.TestRunner.main(testCaseName);
}
}