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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.messagebus;
import com.yahoo.messagebus.test.SimpleMessage;
import org.junit.jupiter.api.Test;
import java.util.LinkedList;
import java.util.Queue;
import static org.junit.jupiter.api.Assertions.*;
/**
* @author Simon Thoresen Hult
*/
public class SequencerTestCase {
@Test
void testSyncNone() {
TestQueue src = new TestQueue();
TestQueue dst = new TestQueue();
QueueSender sender = new QueueSender(dst);
Sequencer seq = new Sequencer(sender);
seq.handleMessage(src.createMessage(false, 0));
seq.handleMessage(src.createMessage(false, 0));
seq.handleMessage(src.createMessage(false, 0));
seq.handleMessage(src.createMessage(false, 0));
seq.handleMessage(src.createMessage(false, 0));
assertEquals(0, src.size());
assertEquals(5, dst.size());
dst.replyNext();
dst.replyNext();
dst.replyNext();
dst.replyNext();
dst.replyNext();
assertEquals(5, src.size());
assertEquals(0, dst.size());
src.checkReply(false, 0);
src.checkReply(false, 0);
src.checkReply(false, 0);
src.checkReply(false, 0);
src.checkReply(false, 0);
assertEquals(0, src.size());
assertEquals(0, dst.size());
}
@Test
void testSyncId() {
TestQueue src = new TestQueue();
TestQueue dst = new TestQueue();
QueueSender sender = new QueueSender(dst);
Sequencer seq = new Sequencer(sender);
seq.handleMessage(src.createMessage(true, 1L));
seq.handleMessage(src.createMessage(true, 2L));
seq.handleMessage(src.createMessage(true, 3L));
seq.handleMessage(src.createMessage(true, 4L));
seq.handleMessage(src.createMessage(true, 5L));
assertEquals(0, src.size());
assertEquals(5, dst.size());
seq.handleMessage(src.createMessage(true, 1L));
seq.handleMessage(src.createMessage(true, 5L));
seq.handleMessage(src.createMessage(true, 2L));
seq.handleMessage(src.createMessage(true, 10L));
seq.handleMessage(src.createMessage(true, 4L));
seq.handleMessage(src.createMessage(true, 3L));
assertEquals(0, src.size());
assertEquals(6, dst.size());
dst.replyNext();
dst.replyNext();
dst.replyNext();
dst.replyNext();
dst.replyNext();
assertEquals(5, src.size());
assertEquals(6, dst.size());
dst.replyNext();
dst.replyNext();
dst.replyNext();
dst.replyNext();
dst.replyNext();
dst.replyNext();
assertEquals(11, src.size());
assertEquals(0, dst.size());
src.checkReply(true, 1);
src.checkReply(true, 2);
src.checkReply(true, 3);
src.checkReply(true, 4);
src.checkReply(true, 5);
src.checkReply(true, 10);
src.checkReply(true, 1);
src.checkReply(true, 2);
src.checkReply(true, 3);
src.checkReply(true, 4);
src.checkReply(true, 5);
assertEquals(0, src.size());
assertEquals(0, dst.size());
}
@SuppressWarnings("serial")
private static class TestQueue extends LinkedList<Routable> implements ReplyHandler {
void checkReply(boolean hasSeqId, long seqId) {
if (size() == 0) {
throw new IllegalStateException("No routable in queue.");
}
Routable obj = remove();
assertTrue(obj instanceof Reply);
Reply reply = (Reply)obj;
Message msg = reply.getMessage();
assertNotNull(msg);
assertEquals(hasSeqId, msg.hasSequenceId());
if (hasSeqId) {
assertEquals(seqId, msg.getSequenceId());
}
}
public void handleReply(Reply reply) {
add(reply);
}
void replyNext() {
Routable obj = remove();
assertTrue(obj instanceof Message);
Message msg = (Message)obj;
Reply reply = new EmptyReply();
reply.swapState(msg);
reply.setMessage(msg);
ReplyHandler handler = reply.popHandler();
handler.handleReply(reply);
}
Message createMessage(final boolean hasSeqId, final long seqId) {
Message ret = new MyMessage(hasSeqId, seqId);
ret.pushHandler(this);
return ret;
}
}
private static class QueueSender implements MessageHandler {
Queue<Routable> queue;
QueueSender(Queue<Routable> queue) {
this.queue = queue;
}
@Override
public void handleMessage(Message msg) {
queue.offer(msg);
}
}
private static class MyMessage extends SimpleMessage {
final boolean hasSeqId;
final long seqId;
MyMessage(boolean hasSeqId, long seqId) {
super("foo");
this.hasSeqId = hasSeqId;
this.seqId = seqId;
}
@Override
public boolean hasSequenceId() {
return hasSeqId;
}
@Override
public long getSequenceId() {
return seqId;
}
}
}
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