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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.network.local;
import com.yahoo.concurrent.SystemTimer;
import com.yahoo.messagebus.DestinationSession;
import com.yahoo.messagebus.DestinationSessionParams;
import com.yahoo.messagebus.EmptyReply;
import com.yahoo.messagebus.ErrorCode;
import com.yahoo.messagebus.IntermediateSession;
import com.yahoo.messagebus.IntermediateSessionParams;
import com.yahoo.messagebus.Message;
import com.yahoo.messagebus.MessageBus;
import com.yahoo.messagebus.MessageBusParams;
import com.yahoo.messagebus.MessageHandler;
import com.yahoo.messagebus.Reply;
import com.yahoo.messagebus.ReplyHandler;
import com.yahoo.messagebus.Result;
import com.yahoo.messagebus.SourceSession;
import com.yahoo.messagebus.SourceSessionParams;
import com.yahoo.messagebus.StaticThrottlePolicy;
import com.yahoo.messagebus.ThrottlePolicy;
import com.yahoo.messagebus.routing.Hop;
import com.yahoo.messagebus.routing.Route;
import com.yahoo.messagebus.test.SimpleMessage;
import com.yahoo.messagebus.test.SimpleProtocol;
import com.yahoo.messagebus.test.SimpleReply;
import org.junit.jupiter.api.Test;
import java.util.concurrent.BlockingDeque;
import java.util.concurrent.LinkedBlockingDeque;
import java.util.concurrent.TimeUnit;
import static org.junit.jupiter.api.Assertions.*;
/**
* @author Simon Thoresen Hult
*/
public class LocalNetworkTest {
@Test
void requireThatLocalNetworkCanSendAndReceive() throws InterruptedException {
final LocalWire wire = new LocalWire();
final Server serverA = new Server(wire);
final SourceSession source = serverA.newSourceSession();
final Server serverB = new Server(wire);
final IntermediateSession intermediate = serverB.newIntermediateSession();
final Server serverC = new Server(wire);
final DestinationSession destination = serverC.newDestinationSession();
Message msg = new SimpleMessage("foo");
msg.setRoute(new Route().addHop(Hop.parse(intermediate.getConnectionSpec()))
.addHop(Hop.parse(destination.getConnectionSpec())));
assertTrue(source.send(msg).isAccepted());
msg = serverB.messages.poll(60, TimeUnit.SECONDS);
assertTrue(msg instanceof SimpleMessage);
assertEquals("foo", ((SimpleMessage) msg).getValue());
intermediate.forward(msg);
msg = serverC.messages.poll(60, TimeUnit.SECONDS);
assertTrue(msg instanceof SimpleMessage);
assertEquals("foo", ((SimpleMessage) msg).getValue());
Reply reply = new SimpleReply("bar");
reply.swapState(msg);
destination.reply(reply);
reply = serverB.replies.poll(60, TimeUnit.SECONDS);
assertTrue(reply instanceof SimpleReply);
assertEquals("bar", ((SimpleReply) reply).getValue());
intermediate.forward(reply);
reply = serverA.replies.poll(60, TimeUnit.SECONDS);
assertTrue(reply instanceof SimpleReply);
assertEquals("bar", ((SimpleReply) reply).getValue());
serverA.mbus.destroy();
serverB.mbus.destroy();
serverC.mbus.destroy();
}
@Test
void requireThatUnknownServiceRepliesWithNoAddressForService() throws InterruptedException {
final Server server = new Server(new LocalWire());
final SourceSession source = server.newSourceSession();
final Message msg = new SimpleMessage("foo").setRoute(Route.parse("bar"));
assertTrue(source.send(msg).isAccepted());
final Reply reply = server.replies.poll(60, TimeUnit.SECONDS);
assertTrue(reply instanceof EmptyReply);
server.mbus.destroy();
}
@Test
void requireThatBlockingSendTimeOutInSendQ() throws InterruptedException {
final LocalWire wire = new LocalWire();
final Server serverA = new Server(wire);
final SourceSession source = serverA.newSourceSession(new StaticThrottlePolicy().setMaxPendingCount(1));
final Server serverB = new Server(wire);
final IntermediateSession intermediate = serverB.newIntermediateSession();
final Server serverC = new Server(wire);
final DestinationSession destination = serverC.newDestinationSession();
Message msg = new SimpleMessage("foo");
msg.setRoute(new Route().addHop(Hop.parse(intermediate.getConnectionSpec()))
.addHop(Hop.parse(destination.getConnectionSpec())));
assertTrue(source.sendBlocking(msg).isAccepted());
long start = SystemTimer.INSTANCE.milliTime();
Message msg2 = new SimpleMessage("foo2");
msg2.setRoute(new Route().addHop(Hop.parse(intermediate.getConnectionSpec()))
.addHop(Hop.parse(destination.getConnectionSpec())));
long TIMEOUT = 1000;
msg2.setTimeRemaining(TIMEOUT);
Result res = source.sendBlocking(msg2);
assertFalse(res.isAccepted());
assertEquals(ErrorCode.TIMEOUT, res.getError().getCode());
assertTrue(res.getError().getMessage().endsWith("Timed out in sendQ"));
long end = SystemTimer.INSTANCE.milliTime();
assertTrue(end >= start + TIMEOUT);
assertTrue(end < start + 5 * TIMEOUT);
msg = serverB.messages.poll(60, TimeUnit.SECONDS);
assertTrue(msg instanceof SimpleMessage);
assertEquals("foo", ((SimpleMessage) msg).getValue());
intermediate.forward(msg);
msg = serverC.messages.poll(60, TimeUnit.SECONDS);
assertTrue(msg instanceof SimpleMessage);
assertEquals("foo", ((SimpleMessage) msg).getValue());
Reply reply = new SimpleReply("bar");
reply.swapState(msg);
destination.reply(reply);
reply = serverB.replies.poll(60, TimeUnit.SECONDS);
assertTrue(reply instanceof SimpleReply);
assertEquals("bar", ((SimpleReply) reply).getValue());
intermediate.forward(reply);
reply = serverA.replies.poll(60, TimeUnit.SECONDS);
assertEquals(ErrorCode.TIMEOUT, reply.getError(0).getCode());
assertTrue(reply.getError(0).getMessage().endsWith("Timed out in sendQ"));
reply = serverA.replies.poll(60, TimeUnit.SECONDS);
assertTrue(reply instanceof SimpleReply);
assertEquals("bar", ((SimpleReply) reply).getValue());
serverA.mbus.destroy();
serverB.mbus.destroy();
serverC.mbus.destroy();
}
private static class Server implements MessageHandler, ReplyHandler {
final MessageBus mbus;
final BlockingDeque<Message> messages = new LinkedBlockingDeque<>();
final BlockingDeque<Reply> replies = new LinkedBlockingDeque<>();
Server(LocalWire wire) {
mbus = new MessageBus(new LocalNetwork(wire),
new MessageBusParams().addProtocol(new SimpleProtocol())
.setRetryPolicy(null));
}
SourceSession newSourceSession() {
return mbus.createSourceSession(new SourceSessionParams()
.setTimeout(600.0)
.setReplyHandler(this));
}
SourceSession newSourceSession(ThrottlePolicy throttlePolicy) {
return mbus.createSourceSession(new SourceSessionParams()
.setTimeout(600.0)
.setReplyHandler(this)
.setThrottlePolicy(throttlePolicy));
}
IntermediateSession newIntermediateSession() {
return mbus.createIntermediateSession(new IntermediateSessionParams()
.setMessageHandler(this)
.setReplyHandler(this));
}
DestinationSession newDestinationSession() {
return mbus.createDestinationSession(new DestinationSessionParams()
.setMessageHandler(this));
}
@Override
public void handleMessage(Message msg) {
messages.addLast(msg);
}
@Override
public void handleReply(Reply reply) {
replies.addLast(reply);
}
}
}
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