/**
* Copyright 2014 Netflix, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package rx.subjects;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Param;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.infra.Blackhole;
import rx.Observer;
@BenchmarkMode(Mode.Throughput)
@OutputTimeUnit(TimeUnit.SECONDS)
@State(Scope.Thread)
public class ReplaySubjectPerf {
@State(Scope.Thread)
public static class Input {
@Param({ "1", "1000", "1000000" })
public int nextRuns;
}
@Benchmark
public void subscribeBeforeEventsUnbounded(final Input input, final Blackhole bh) throws Exception {
subscribeBeforeEvents(ReplaySubject.create(), input, bh);
}
@Benchmark
public void subscribeBeforeEventsCount1(final Input input, final Blackhole bh) throws Exception {
subscribeBeforeEvents(ReplaySubject.create(1), input, bh);
}
private void subscribeBeforeEvents(ReplaySubject<Object> subject, final Input input, final Blackhole bh) throws Exception {
final CountDownLatch latch = new CountDownLatch(1);
final AtomicLong sum = new AtomicLong();
subject.subscribe(new Observer<Object>() {
@Override
public void onCompleted() {
latch.countDown();
}
@Override
public void onError(Throwable e) {
}
@Override
public void onNext(Object o) {
sum.incrementAndGet();
}
});
for (int i = 0; i < input.nextRuns; i++) {
subject.onNext("Response");
}
subject.onCompleted();
latch.await();
bh.consume(sum);
}
@Benchmark
public void subscribeAfterEventsUnbounded(final Input input, final Blackhole bh) throws Exception {
subscribeAfterEvents(ReplaySubject.create(), input, bh);
}
@Benchmark
public void subscribeAfterEventsCount1(final Input input, final Blackhole bh) throws Exception {
subscribeAfterEvents(ReplaySubject.create(1), input, bh);
}
private void subscribeAfterEvents(ReplaySubject<Object> subject, final Input input, final Blackhole bh) throws Exception {
final CountDownLatch latch = new CountDownLatch(1);
final AtomicLong sum = new AtomicLong();
for (int i = 0; i < input.nextRuns; i++) {
subject.onNext("Response");
}
subject.onCompleted();
subject.subscribe(new Observer<Object>() {
@Override
public void onCompleted() {
latch.countDown();
}
@Override
public void onError(Throwable e) {
}
@Override
public void onNext(Object o) {
sum.incrementAndGet();
}
});
latch.await();
bh.consume(sum);
}
}