package org.jgroups.tests;
import org.jgroups.Global;
import org.jgroups.JChannel;
import org.jgroups.Message;
import org.jgroups.ReceiverAdapter;
import org.jgroups.protocols.*;
import org.jgroups.protocols.pbcast.GMS;
import org.jgroups.protocols.pbcast.NAKACK2;
import org.jgroups.protocols.pbcast.STABLE;
import org.jgroups.stack.Protocol;
import org.jgroups.util.Util;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
/**
* Class to test FRAG protocol. It uses ProtocolTester to assemble a minimal stack which only consists of
* FRAG and LOOPBACK (messages are immediately resent up the stack). Sends NUM_MSGS with MSG_SIZE size down
* the stack, they should be received as well.
*
* @author Bela Ban
*/
@Test(groups=Global.FUNCTIONAL,singleThreaded=true)
public class FragTest {
public static final long NUM_MSGS = 1000;
public static final int MSG_SIZE = 100000;
public static final int FRAG_SIZE = 24000;
protected JChannel ch;
private static Message createMessage(int size) {
byte[] buf=new byte[size];
for(int i=0; i < buf.length; i++) buf[i]=(byte)'x';
return new Message(null, buf);
}
@BeforeClass
protected void setup() throws Exception {
ch=createChannel();
ch.connect("FragTestCluster");
}
@AfterClass
protected void destroy() {
Util.close(ch);
}
public void testRegularMessages() throws Exception {
FragReceiver frag_receiver=new FragReceiver();
ch.setReceiver(frag_receiver);
for(int i=1; i <= NUM_MSGS; i++) {
Message big_msg=createMessage(MSG_SIZE);
ch.send(big_msg);
}
System.out.println("-- done sending");
for(int i=0; i < 10; i++) {
int num_msgs=frag_receiver.getNumMsgs();
if(num_msgs >= NUM_MSGS)
break;
Util.sleep(500);
}
assert frag_receiver.getNumMsgs() == NUM_MSGS;
}
public void testMessagesWithOffsets() throws Exception {
FragReceiver frag_receiver=new FragReceiver();
ch.setReceiver(frag_receiver);
byte[] big_buffer=new byte[(int)(MSG_SIZE * NUM_MSGS)];
int offset=0;
for(int i=1; i <= NUM_MSGS; i++) {
Message big_msg=new Message(null, null, big_buffer, offset, MSG_SIZE);
ch.send(big_msg);
offset+=MSG_SIZE;
}
System.out.println("-- done sending");
for(int i=0; i < 10; i++) {
int num_msgs=frag_receiver.getNumMsgs();
if(num_msgs >= NUM_MSGS)
break;
Util.sleep(500);
}
assert frag_receiver.getNumMsgs() == NUM_MSGS;
}
/**
* Tests potential ordering violation by sending small, unfragmented messages, followed by a large message
* which generates 3 fragments, followed by a final small message. Verifies that the message assembled from the
* 3 fragments is in the right place and not at the end. JIRA=https://issues.jboss.org/browse/JGRP-1648
*/
public void testMessageOrdering() throws Exception {
OrderingReceiver receiver=new OrderingReceiver();
ch.setReceiver(receiver);
Protocol frag=ch.getProtocolStack().findProtocol(FRAG2.class, FRAG.class);
frag.setValue("frag_size", 5000);
Message first=new Message(null, new Payload(1, 10));
Message big=new Message(null, new Payload(2, 12000)); // frag_size is 5000, so FRAG{2} will create 3 fragments
Message last=new Message(null, new Payload(3, 10));
ch.send(first);
ch.send(big);
ch.send(last);
List<Integer> list=receiver.getList();
for(int i=0; i < 10; i++) {
if(list.size() == 3)
break;
Util.sleep(1000);
}
System.out.println("list = " + list);
assert list.size() == 3;
// assert that the ordering is [1 2 3], *not* [1 3 2]
for(int i=0; i < list.size(); i++) {
assert list.get(i) == i+1 : "element at index " + i + " is " + list.get(i) + ", was supposed to be " + (i+1);
}
}
protected static JChannel createChannel() throws Exception {
return new JChannel(new SHARED_LOOPBACK(),
new SHARED_LOOPBACK_PING(),
new NAKACK2().setValue("use_mcast_xmit", false),
new UNICAST3(),
new STABLE().setValue("max_bytes", 50000),
new GMS().setValue("print_local_addr", false),
new UFC(),
new MFC(),
new FRAG2().setValue("frag_size", FRAG_SIZE));
}
protected static class FragReceiver extends ReceiverAdapter {
int num_msgs=0;
public int getNumMsgs() {
return num_msgs;
}
public void receive(Message msg) {
num_msgs++;
if(num_msgs % 100 == 0)
System.out.println("received " + num_msgs + " / " + NUM_MSGS);
}
}
protected static class OrderingReceiver extends ReceiverAdapter {
protected final List<Integer> list=new ArrayList<Integer>();
public List<Integer> getList() {return list;}
public void receive(Message msg) {
Payload payload=(Payload)msg.getObject();
list.add(payload.seqno);
}
}
protected static class Payload implements Serializable {
private static final long serialVersionUID=-1989899280425578506L;
protected int seqno;
protected byte[] buffer;
protected Payload(int seqno, int size) {
this.seqno=seqno;
this.buffer=new byte[size];
}
}
}