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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.routing;
import com.yahoo.jrt.ListenFailedException;
import com.yahoo.jrt.slobrok.server.Slobrok;
import com.yahoo.messagebus.DestinationSession;
import com.yahoo.messagebus.DestinationSessionParams;
import com.yahoo.messagebus.EmptyReply;
import com.yahoo.messagebus.Error;
import com.yahoo.messagebus.ErrorCode;
import com.yahoo.messagebus.Message;
import com.yahoo.messagebus.MessageBusParams;
import com.yahoo.messagebus.Reply;
import com.yahoo.messagebus.SourceSession;
import com.yahoo.messagebus.SourceSessionParams;
import com.yahoo.messagebus.network.Identity;
import com.yahoo.messagebus.network.rpc.RPCNetworkParams;
import com.yahoo.messagebus.network.rpc.test.TestServer;
import com.yahoo.messagebus.test.Receptor;
import com.yahoo.messagebus.test.SimpleMessage;
import com.yahoo.messagebus.test.SimpleProtocol;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;
/**
* @author Simon Thoresen Hult
*/
public class ResenderTestCase {
Slobrok slobrok;
TestServer srcServer, dstServer;
SourceSession srcSession;
DestinationSession dstSession;
RetryTransientErrorsPolicy retryPolicy;
@BeforeEach
public void setUp() throws ListenFailedException {
slobrok = new Slobrok();
dstServer = new TestServer(new MessageBusParams().addProtocol(new SimpleProtocol()),
new RPCNetworkParams().setIdentity(new Identity("dst")).setSlobrokConfigId(TestServer.getSlobrokConfig(slobrok)));
dstSession = dstServer.mb.createDestinationSession(new DestinationSessionParams().setName("session").setMessageHandler(new Receptor()));
retryPolicy = new RetryTransientErrorsPolicy();
retryPolicy.setBaseDelay(0);
srcServer = new TestServer(new MessageBusParams().setRetryPolicy(retryPolicy).addProtocol(new SimpleProtocol()),
new RPCNetworkParams().setSlobrokConfigId(TestServer.getSlobrokConfig(slobrok)));
srcSession = srcServer.mb.createSourceSession(
new SourceSessionParams().setTimeout(600.0).setReplyHandler(new Receptor()));
assertTrue(srcServer.waitSlobrok("dst/session", 1));
}
@AfterEach
public void tearDown() {
slobrok.stop();
dstSession.destroy();
dstServer.destroy();
srcSession.destroy();
srcServer.destroy();
}
@Test
void testRetryTag() {
assertTrue(srcSession.send(createMessage("msg"), Route.parse("dst/session")).isAccepted());
Message msg = ((Receptor) dstSession.getMessageHandler()).getMessage(60);
assertNotNull(msg);
for (int i = 0; i < 5; ++i) {
assertEquals(i, msg.getRetry());
assertTrue(msg.getRetryEnabled());
replyFromDestination(msg, ErrorCode.APP_TRANSIENT_ERROR, 0);
assertNotNull(msg = ((Receptor) dstSession.getMessageHandler()).getMessage(60));
}
dstSession.acknowledge(msg);
Reply reply = ((Receptor) srcSession.getReplyHandler()).getReply(60);
assertNotNull(reply);
assertFalse(reply.hasErrors());
assertNull(((Receptor) dstSession.getMessageHandler()).getMessage(0));
}
@Test
void testRetryEnabledTag() {
Message msg = createMessage("msg");
msg.setRetryEnabled(false);
assertTrue(srcSession.send(msg, Route.parse("dst/session")).isAccepted());
assertNotNull(msg = ((Receptor) dstSession.getMessageHandler()).getMessage(60));
assertFalse(msg.getRetryEnabled());
replyFromDestination(msg, ErrorCode.APP_TRANSIENT_ERROR, 0);
Reply reply = ((Receptor) srcSession.getReplyHandler()).getReply(60);
assertNotNull(reply);
assertTrue(reply.hasErrors());
assertNull(((Receptor) dstSession.getMessageHandler()).getMessage(0));
}
@Test
void testTransientError() {
assertTrue(srcSession.send(createMessage("msg"), Route.parse("dst/session")).isAccepted());
Message msg = ((Receptor) dstSession.getMessageHandler()).getMessage(60);
assertNotNull(msg);
replyFromDestination(msg, ErrorCode.APP_TRANSIENT_ERROR, 0);
assertNotNull(msg = ((Receptor) dstSession.getMessageHandler()).getMessage(60));
replyFromDestination(msg, ErrorCode.APP_FATAL_ERROR, 0);
Reply reply = ((Receptor) srcSession.getReplyHandler()).getReply(60);
assertNotNull(reply);
assertTrue(reply.hasFatalErrors());
assertNull(((Receptor) dstSession.getMessageHandler()).getMessage(0));
}
@Test
void testFatalError() {
assertTrue(srcSession.send(createMessage("msg"), Route.parse("dst/session")).isAccepted());
Message msg = ((Receptor) dstSession.getMessageHandler()).getMessage(60);
assertNotNull(msg);
replyFromDestination(msg, ErrorCode.APP_FATAL_ERROR, 0);
Reply reply = ((Receptor) srcSession.getReplyHandler()).getReply(60);
assertNotNull(reply);
assertTrue(reply.hasFatalErrors());
assertNull(((Receptor) dstSession.getMessageHandler()).getMessage(0));
}
@Test
void testDisableRetry() {
retryPolicy.setEnabled(false);
assertTrue(srcSession.send(createMessage("msg"), Route.parse("dst/session")).isAccepted());
Message msg = ((Receptor) dstSession.getMessageHandler()).getMessage(60);
assertNotNull(msg);
replyFromDestination(msg, ErrorCode.APP_TRANSIENT_ERROR, 0);
Reply reply = ((Receptor) srcSession.getReplyHandler()).getReply(60);
assertNotNull(reply);
assertTrue(reply.hasErrors());
assertFalse(reply.hasFatalErrors());
assertNull(((Receptor) dstSession.getMessageHandler()).getMessage(0));
}
@Test
void testRetryDelay() {
retryPolicy.setBaseDelay(0.01);
assertTrue(srcSession.send(createMessage("msg"), Route.parse("dst/session")).isAccepted());
Message msg = ((Receptor) dstSession.getMessageHandler()).getMessage(60);
assertNotNull(msg);
for (int i = 0; i < 5; ++i) {
replyFromDestination(msg, ErrorCode.APP_TRANSIENT_ERROR, -1);
assertNotNull(msg = ((Receptor) dstSession.getMessageHandler()).getMessage(60));
}
replyFromDestination(msg, ErrorCode.APP_FATAL_ERROR, 0);
Reply reply = ((Receptor) srcSession.getReplyHandler()).getReply(60);
assertNotNull(reply);
assertTrue(reply.hasFatalErrors());
assertNull(((Receptor) dstSession.getMessageHandler()).getMessage(0));
String trace = reply.getTrace().toString();
assertTrue(trace.contains("retry 1 in 0.0"));
assertTrue(trace.contains("retry 2 in 0.02"));
assertTrue(trace.contains("retry 3 in 0.04"));
assertTrue(trace.contains("retry 4 in 0.08"));
assertTrue(trace.contains("retry 5 in 0.16"));
}
@Test
void testRequestRetryDelay() {
assertTrue(srcSession.send(createMessage("msg"), Route.parse("dst/session")).isAccepted());
Message msg = ((Receptor) dstSession.getMessageHandler()).getMessage(60);
assertNotNull(msg);
for (int i = 0; i < 5; ++i) {
replyFromDestination(msg, ErrorCode.APP_TRANSIENT_ERROR, i / 50.0);
assertNotNull(msg = ((Receptor) dstSession.getMessageHandler()).getMessage(60));
}
replyFromDestination(msg, ErrorCode.APP_FATAL_ERROR, 0);
Reply reply = ((Receptor) srcSession.getReplyHandler()).getReply(60);
assertNotNull(reply);
assertTrue(reply.hasFatalErrors());
assertNull(((Receptor) dstSession.getMessageHandler()).getMessage(0));
String trace = reply.getTrace().toString();
assertTrue(trace.contains("retry 1 in 0"));
assertTrue(trace.contains("retry 2 in 0.02"));
assertTrue(trace.contains("retry 3 in 0.04"));
assertTrue(trace.contains("retry 4 in 0.06"));
assertTrue(trace.contains("retry 5 in 0.08"));
}
private static Message createMessage(String msg) {
SimpleMessage ret = new SimpleMessage(msg);
ret.getTrace().setLevel(9);
return ret;
}
private void replyFromDestination(Message msg, int errorCode, double retryDelay) {
Reply reply = new EmptyReply();
reply.swapState(msg);
if (errorCode != ErrorCode.NONE) {
reply.addError(new Error(errorCode, "err"));
}
reply.setRetryDelay(retryDelay);
dstSession.reply(reply);
}
}
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