package org.jgroups.tests;
import org.jgroups.*;
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.AfterMethod;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
/**
* Class to test fragmentation. 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,dataProvider="fragProvider")
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 a, b;
@DataProvider
static Object[][] fragProvider() {
return new Object[][] {
{FRAG2.class},
{FRAG3.class}
};
}
@Test(enabled=false)
protected void setup(Class<? extends Protocol> frag_clazz) throws Exception {
a=createChannel("A", frag_clazz).connect("FragTest");
b=createChannel("B", frag_clazz).connect("FragTest");
Util.waitUntilAllChannelsHaveSameView(10000, 1000, a,b);
}
@AfterMethod protected void destroy() {Util.close(b, a);}
public void testRegularMessages(Class<? extends Protocol> frag_clazz) throws Exception {
setup(frag_clazz);
FragReceiver frag_receiver=new FragReceiver();
b.setReceiver(frag_receiver);
for(int i=1; i <= NUM_MSGS; i++) {
Message big_msg=createMessage(b.getAddress(), MSG_SIZE);
a.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(Class<? extends Protocol> frag_clazz) throws Exception {
setup(frag_clazz);
FragReceiver frag_receiver=new FragReceiver();
b.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(b.getAddress(), big_buffer, offset, MSG_SIZE);
a.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(Class<? extends Protocol> frag_clazz) throws Exception {
setup(frag_clazz);
OrderingReceiver receiver=new OrderingReceiver();
b.setReceiver(receiver);
Protocol frag=a.getProtocolStack().findProtocol(FRAG3.class, FRAG2.class, FRAG.class);
frag.setValue("frag_size", 5000);
Address dest=b.getAddress();
Message first=new Message(dest, new Payload(1, 10));
Message big=new Message(dest, new Payload(2, 12000)); // frag_size is 5000, so FRAG{2} will create 3 fragments
Message last=new Message(dest, new Payload(3, 10));
a.send(first);
a.send(big);
a.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);
}
}
/* Tests https://issues.jboss.org/browse/JGRP-1973 */
public void testFragCorruption(Class<? extends Protocol> frag_clazz) throws Exception {
setup(frag_clazz);
final String message="this message is supposed to get fragmented by A and defragmented by B";
byte[] buf=message.getBytes();
MyReceiver r=new MyReceiver();
b.setReceiver(r);
a.send(new Message(b.getAddress(), buf).setFlag(Message.Flag.OOB));
for(int i=0; i < 10; i++) {
String msg=r.msg();
if(msg != null) {
assert msg.equals(message) : String.format("expected \"%s\" but received \"%s\"\n", message, msg);
System.out.printf("received \"%s\"\n", msg);
break;
}
Util.sleep(500);
}
}
protected static JChannel createChannel(String name, Class<? extends Protocol> clazz) throws Exception {
Protocol frag_prot=clazz.newInstance();
frag_prot.setValue("frag_size", FRAG_SIZE);
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(),
frag_prot)
.name(name);
}
protected static Message createMessage(Address dest, int size) {
return new Message(dest, new byte[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<>();
public List<Integer> getList() {return list;}
public void receive(Message msg) {
Payload payload=msg.getObject();
list.add(payload.seqno);
}
}
protected static class MyReceiver extends ReceiverAdapter {
protected String msg;
public String msg() {return msg;}
public void receive(Message msg) {
this.msg=new String(msg.getRawBuffer(), msg.getOffset(), msg.getLength());
}
}
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];
}
}
}