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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.messagebus.jdisc;
import com.yahoo.jdisc.application.ContainerBuilder;
import com.yahoo.jdisc.service.CurrentContainer;
import com.yahoo.jdisc.test.TestDriver;
import com.yahoo.messagebus.DestinationSessionParams;
import com.yahoo.messagebus.EmptyReply;
import com.yahoo.messagebus.Message;
import com.yahoo.messagebus.MessageBus;
import com.yahoo.messagebus.MessageBusParams;
import com.yahoo.messagebus.Reply;
import com.yahoo.messagebus.ReplyHandler;
import com.yahoo.messagebus.SourceSession;
import com.yahoo.messagebus.SourceSessionParams;
import com.yahoo.messagebus.network.local.LocalNetwork;
import com.yahoo.messagebus.network.local.LocalWire;
import com.yahoo.messagebus.routing.Route;
import com.yahoo.messagebus.shared.SharedDestinationSession;
import com.yahoo.messagebus.shared.SharedMessageBus;
import com.yahoo.messagebus.test.SimpleMessage;
import com.yahoo.messagebus.test.SimpleProtocol;
import org.junit.Test;
import java.util.concurrent.BlockingDeque;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.concurrent.LinkedBlockingDeque;
import java.util.concurrent.TimeUnit;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
/**
* @author Simon Thoresen Hult
*/
public class ServerThreadingTestCase {
private static final int NUM_THREADS = 32;
private static final int NUM_REQUESTS = 1000;
@Test
public void requireThatServerIsThreadSafe() throws Exception {
final LocalWire wire = new LocalWire();
final Client client = new Client(wire);
final Server server = new Server(wire);
for (int i = 0; i < NUM_REQUESTS; ++i) {
final Message msg = new SimpleMessage("foo");
msg.setRoute(Route.parse(server.delegate.connectionSpec()));
msg.pushHandler(client);
assertTrue(client.session.send(msg).isAccepted());
}
for (int i = 0; i < NUM_REQUESTS; ++i) {
final Reply reply = client.replies.poll(600, TimeUnit.SECONDS);
assertTrue(reply instanceof EmptyReply);
assertFalse(reply.hasErrors());
}
assertTrue(client.close());
assertTrue(server.close());
}
private static class Client implements ReplyHandler {
final BlockingDeque<Reply> replies = new LinkedBlockingDeque<>();
final MessageBus mbus;
final SourceSession session;
Client(final LocalWire wire) {
mbus = new MessageBus(
new LocalNetwork(wire),
new MessageBusParams().addProtocol(new SimpleProtocol()));
session = mbus.createSourceSession(
new SourceSessionParams()
.setReplyHandler(this)
.setThrottlePolicy(null));
}
@Override
public void handleReply(final Reply reply) {
replies.addLast(reply);
}
boolean close() {
return session.destroy() && mbus.destroy();
}
}
private static class Server extends MbusRequestHandler {
final Executor executor = Executors.newFixedThreadPool(NUM_THREADS);
final MbusServer delegate;
final TestDriver driver;
Server(final LocalWire wire) {
driver = TestDriver.newSimpleApplicationInstanceWithoutOsgi();
delegate = newMbusServer(driver, wire);
final ContainerBuilder builder = driver.newContainerBuilder();
builder.serverBindings().bind("mbus://*/*", this);
driver.activateContainer(builder);
delegate.start();
}
@Override
public void handleMessage(final Message msg) {
executor.execute(() -> {
final Reply reply = new EmptyReply();
reply.swapState(msg);
reply.popHandler().handleReply(reply);
});
}
boolean close() {
delegate.release();
return driver.close();
}
}
private static MbusServer newMbusServer(final CurrentContainer container, final LocalWire wire) {
final SharedMessageBus mbus = new SharedMessageBus(new MessageBus(
new LocalNetwork(wire),
new MessageBusParams().addProtocol(new SimpleProtocol())));
final SharedDestinationSession session = mbus.newDestinationSession(
new DestinationSessionParams());
final MbusServer server = new MbusServer(container, session);
session.release();
mbus.release();
return server;
}
}
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