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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;
import com.yahoo.concurrent.ManualTimer;
import com.yahoo.jrt.ListenFailedException;
import com.yahoo.jrt.slobrok.server.Slobrok;
import com.yahoo.messagebus.network.rpc.test.TestServer;
import com.yahoo.messagebus.routing.RoutingTableSpec;
import com.yahoo.messagebus.test.QueueAdapter;
import com.yahoo.messagebus.test.Receptor;
import com.yahoo.messagebus.test.SimpleMessage;
import com.yahoo.messagebus.test.SimpleProtocol;
import com.yahoo.messagebus.test.SimpleReply;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import java.util.List;
import static org.junit.jupiter.api.Assertions.*;
/**
* @author Simon Thoresen Hult
*/
public class ThrottlerTestCase {
Slobrok slobrok;
TestServer src, dst;
@BeforeEach
public void setUp() throws ListenFailedException {
RoutingTableSpec table = new RoutingTableSpec(SimpleProtocol.NAME);
table.addHop("dst", "test/dst/session", List.of("test/dst/session"));
table.addRoute("test", List.of("dst"));
slobrok = new Slobrok();
src = new TestServer("test/src", table, slobrok, null);
dst = new TestServer("test/dst", table, slobrok, null);
}
@AfterEach
public void tearDown() {
dst.destroy();
src.destroy();
slobrok.stop();
}
@Test
void testMaxCount() {
// Prepare a source session with throttle enabled.
SourceSessionParams params = new SourceSessionParams().setTimeout(600.0);
StaticThrottlePolicy policy = new StaticThrottlePolicy();
policy.setMaxPendingCount(10);
params.setThrottlePolicy(policy);
Receptor src_rr = new Receptor();
SourceSession src_s = src.mb.createSourceSession(src_rr, params);
// Prepare a destination session to acknowledge messages.
QueueAdapter dst_q = new QueueAdapter();
DestinationSession dst_s = dst.mb.createDestinationSession("session", true, dst_q);
src.waitSlobrok("test/dst/session", 1);
// Send until throttler rejects a message.
for (int i = 0; i < policy.getMaxPendingCount(); i++) {
assertTrue(src_s.send(new SimpleMessage("msg"), "test").isAccepted());
}
assertFalse(src_s.send(new SimpleMessage("msg"), "test").isAccepted());
// Acknowledge one message at a time, then attempt to send two more.
for (int i = 0; i < 10; i++) {
assertTrue(dst_q.waitSize(policy.getMaxPendingCount(), 60));
dst_s.acknowledge((Message) dst_q.dequeue());
assertNotNull(src_rr.getReply(60));
assertTrue(src_s.send(new SimpleMessage("msg"), "test").isAccepted());
assertFalse(src_s.send(new SimpleMessage("msg"), "test").isAccepted());
}
assertTrue(dst_q.waitSize(policy.getMaxPendingCount(), 60));
while (!dst_q.isEmpty()) {
dst_s.acknowledge((Message) dst_q.dequeue());
}
src_s.close();
dst_s.destroy();
}
@Test
void testMaxSize() {
// Prepare a source session with throttle enabled.
SourceSessionParams params = new SourceSessionParams().setTimeout(600.0);
StaticThrottlePolicy policy = new StaticThrottlePolicy();
policy.setMaxPendingCount(1000);
policy.setMaxPendingSize(2);
params.setThrottlePolicy(policy);
Receptor src_rr = new Receptor();
SourceSession src_s = src.mb.createSourceSession(src_rr, params);
// Prepare a destination session to acknowledge messages.
QueueAdapter dst_q = new QueueAdapter();
DestinationSession dst_s = dst.mb.createDestinationSession("session", true, dst_q);
src.waitSlobrok("test/dst/session", 1);
assertTrue(src_s.send(new SimpleMessage("1"), "test").isAccepted());
assertTrue(dst_q.waitSize(1, 60));
assertTrue(src_s.send(new SimpleMessage("12"), "test").isAccepted());
assertTrue(dst_q.waitSize(2, 60));
assertFalse(src_s.send(new SimpleMessage("1"), "test").isAccepted());
dst_s.acknowledge((Message) dst_q.dequeue());
assertNotNull(src_rr.getReply(60));
assertFalse(src_s.send(new SimpleMessage("1"), "test").isAccepted());
dst_s.acknowledge((Message) dst_q.dequeue());
assertNotNull(src_rr.getReply(60));
assertTrue(src_s.send(new SimpleMessage("12"), "test").isAccepted());
assertTrue(dst_q.waitSize(1, 60));
assertFalse(src_s.send(new SimpleMessage("1"), "test").isAccepted());
dst_s.acknowledge((Message) dst_q.dequeue());
assertNotNull(src_rr.getReply(60));
// Close sessions.
src_s.close();
dst_s.destroy();
}
@Test
void testDynamicWindowSize() {
ManualTimer timer = new ManualTimer();
DynamicThrottlePolicy policy = new DynamicThrottlePolicy(timer);
policy.setWindowSizeIncrement(5)
.setResizeRate(1);
double windowSize = getWindowSize(policy, timer, 100);
assertTrue(windowSize >= 90 && windowSize <= 105);
windowSize = getWindowSize(policy, timer, 200);
assertTrue(windowSize >= 180 && windowSize <= 205);
windowSize = getWindowSize(policy, timer, 50);
assertTrue(windowSize >= 45 && windowSize <= 55);
windowSize = getWindowSize(policy, timer, 500);
assertTrue(windowSize >= 450 && windowSize <= 505);
windowSize = getWindowSize(policy, timer, 100);
assertTrue(windowSize >= 90 && windowSize <= 115);
}
@Test
void testIdleTimePeriod() {
ManualTimer timer = new ManualTimer();
DynamicThrottlePolicy policy = new DynamicThrottlePolicy(timer);
policy.setWindowSizeIncrement(5)
.setMinWindowSize(1)
.setResizeRate(1);
double windowSize = getWindowSize(policy, timer, 100);
assertTrue(windowSize >= 90 && windowSize <= 110);
Message msg = new SimpleMessage("foo");
timer.advance(30 * 1000);
assertTrue(policy.canSend(msg, 0));
assertTrue(windowSize >= 90 && windowSize <= 110);
timer.advance(60 * 1000 + 1);
assertTrue(policy.canSend(msg, 50));
assertEquals(55, policy.getMaxPendingCount());
timer.advance(60 * 1000 + 1);
assertTrue(policy.canSend(msg, 0));
assertEquals(5, policy.getMaxPendingCount());
}
@Test
void testMinWindowSize() {
ManualTimer timer = new ManualTimer();
DynamicThrottlePolicy policy = new DynamicThrottlePolicy(timer);
policy.setWindowSizeIncrement(5)
.setResizeRate(1)
.setMinWindowSize(150);
double windowSize = getWindowSize(policy, timer, 200);
assertTrue(windowSize >= 150 && windowSize <= 210);
}
@Test
void testMaxWindowSize() {
ManualTimer timer = new ManualTimer();
DynamicThrottlePolicy policy = new DynamicThrottlePolicy(timer);
policy.setWindowSizeIncrement(5);
policy.setResizeRate(1);
policy.setMaxWindowSize(50);
double windowSize = getWindowSize(policy, timer, 100);
assertTrue(windowSize >= 40 && windowSize <= 50);
}
private int getWindowSize(DynamicThrottlePolicy policy, ManualTimer timer, int maxPending) {
Message msg = new SimpleMessage("foo");
Reply reply = new SimpleReply("bar");
reply.setContext(1);
for (int i = 0; i < 999; ++i) {
int numPending = 0;
while (policy.canSend(msg, numPending)) {
policy.processMessage(msg);
++numPending;
}
long tripTime = (numPending < maxPending) ? 1000L : 1000 + (numPending - maxPending) * 1000L;
timer.advance(tripTime);
while (--numPending >= 0) {
policy.processReply(reply);
}
}
int ret = policy.getMaxPendingCount();
System.out.println("getWindowSize() = " + ret);
return ret;
}
}
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