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// Copyright 2019 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.jrt;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.logging.Logger;
import static com.yahoo.jrt.CryptoUtils.createTestTlsContext;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
public class LatencyTest {
private static final Logger log = Logger.getLogger(LatencyTest.class.getName());
private static class Server implements AutoCloseable {
private Supervisor orb;
private Acceptor acceptor;
public Server(CryptoEngine crypto) throws ListenFailedException {
orb = new Supervisor(new Transport(crypto));
acceptor = orb.listen(new Spec(0));
orb.addMethod(new Method("inc", "i", "i", this, "rpc_inc"));
}
public Target connect() {
return orb.connect(new Spec("localhost", acceptor.port()));
}
public void rpc_inc(Request req) {
req.returnValues().add(new Int32Value(req.parameters().get(0).asInt32() + 1));
}
public void close() {
acceptor.shutdown().join();
orb.transport().shutdown().join();
}
}
private void measureLatency(String prefix, Server server, boolean reconnect) {
int value = 100;
List<Double> list = new ArrayList<>();
Target target = server.connect();
for (int i = 0; i < 64; ++i) {
long before = System.nanoTime();
if (reconnect) {
target.close();
target = server.connect();
}
Request req = new Request("inc");
req.parameters().add(new Int32Value(value));
target.invokeSync(req, 60.0);
assertTrue(req.checkReturnTypes("i"));
assertEquals(value + 1, req.returnValues().get(0).asInt32());
value++;
long duration = System.nanoTime() - before;
list.add(duration / 1000000.0);
}
target.close();
Collections.sort(list);
log.info(prefix + "invocation latency: " + list.get(list.size() / 2) + " ms");
}
@org.junit.Test
public void testNullCryptoLatency() throws ListenFailedException {
try (Server server = new Server(new NullCryptoEngine())) {
measureLatency("[null crypto, no reconnect] ", server, false);
measureLatency("[null crypto, reconnect] ", server, true);
}
}
@org.junit.Test
public void testXorCryptoLatency() throws ListenFailedException {
try (Server server = new Server(new XorCryptoEngine())) {
measureLatency("[xor crypto, no reconnect] ", server, false);
measureLatency("[xor crypto, reconnect] ", server, true);
}
}
@org.junit.Test
public void testTlsCryptoLatency() throws ListenFailedException {
try (Server server = new Server(new TlsCryptoEngine(createTestTlsContext()))) {
measureLatency("[tls crypto, no reconnect] ", server, false);
measureLatency("[tls crypto, reconnect] ", server, true);
}
}
}
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