package org.jgroups.tests.byteman;
import org.jboss.byteman.contrib.bmunit.BMNGRunner;
import org.jboss.byteman.contrib.bmunit.BMScript;
import org.jgroups.Global;
import org.jgroups.JChannel;
import org.jgroups.Message;
import org.jgroups.ReceiverAdapter;
import org.jgroups.protocols.SHARED_LOOPBACK;
import org.jgroups.protocols.SHARED_LOOPBACK_PING;
import org.jgroups.protocols.UNICAST3;
import org.jgroups.protocols.pbcast.GMS;
import org.jgroups.protocols.pbcast.NAKACK2;
import org.jgroups.util.Util;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.Test;
import java.util.ArrayList;
import java.util.List;
/**
* Tests the behavior of receiving a unicast message before being connected and sending a response which will
* throw an exception as the channel is not connected yet (https://issues.jboss.org/browse/JGRP-1545).
* @author Bela Ban
* @since 3.3
*/
@Test(groups=Global.BYTEMAN,singleThreaded=true)
public class MessageBeforeConnectedTest extends BMNGRunner {
protected JChannel a;
protected static final String HELLO1="hello-1";
protected static final String HELLO2="hello-2";
protected Throwable ex;
protected final List<String> msgs=new ArrayList<String>();
@AfterMethod
protected void cleanup() {
Util.close(a);
}
protected void receive(Message msg) {
String greeting=(String)msg.getObject();
msgs.add(greeting);
System.out.println("received " + greeting + " from " + msg.getSrc());
if(HELLO1.equals(greeting)) {
try {
a.send(new Message(a.getAddress(), HELLO2));
}
catch(Exception e) {
ex=e;
}
}
}
/**
* When we connect to a channel, but before the state is changed to 'connected', we send a message which will
* trigger an exception.
* Issue: https://issues.jboss.org/browse/JGRP-1545
*/
@BMScript(dir="scripts/MessageBeforeConnectedTest", value="testSendingOfMsgsOnUnconnectedChannel")
public void testSendingOfMsgsOnUnconnectedChannel() throws Throwable {
a=createChannel("A");
a.setReceiver(new ReceiverAdapter() {
public void receive(Message msg) {
MessageBeforeConnectedTest.this.receive(msg);
}
});
a.connect("MessageBeforeConnectedTest");
System.out.println("\nA: " + a.getView());
if(ex != null)
throw ex;
System.out.println("msgs = " + msgs);
for(int i=0; i < 20; i++) {
if(msgs.size() == 2)
break;
Util.sleep(500);
}
assert msgs.size() == 2 && msgs.contains(HELLO1) && msgs.contains(HELLO2) : "msgs: " + msgs;
}
protected JChannel createChannel(String name) throws Exception {
JChannel ch=new JChannel(new SHARED_LOOPBACK(),
new SHARED_LOOPBACK_PING(),
new NAKACK2().setValue("become_server_queue_size", 10),
new UNICAST3(),
new GMS().setValue("print_local_addr", false));
ch.setName(name);
return ch;
}
}