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Signed-off-by: Simone Bordet <simone.bordet@gmail.com>
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111
src/test/java/org/eclipse/jetty/reactive/client/MetricsTest.java
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| /* | ||
| * Copyright (c) 2017-2022 the original author or authors. | ||
| * | ||
| * 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 org.eclipse.jetty.reactive.client; | ||
|
|
||
| import java.util.Map; | ||
| import java.util.concurrent.ConcurrentHashMap; | ||
| import java.util.concurrent.CountDownLatch; | ||
| import java.util.concurrent.TimeUnit; | ||
| import java.util.concurrent.atomic.AtomicInteger; | ||
| import java.util.stream.IntStream; | ||
|
|
||
| import org.HdrHistogram.ConcurrentHistogram; | ||
| import org.HdrHistogram.Histogram; | ||
| import org.eclipse.jetty.client.api.Request; | ||
| import org.eclipse.jetty.toolchain.perf.HistogramSnapshot; | ||
| import org.reactivestreams.Subscriber; | ||
| import org.reactivestreams.Subscription; | ||
| import org.testng.Assert; | ||
| import org.testng.annotations.Factory; | ||
| import org.testng.annotations.Test; | ||
|
|
||
| public class MetricsTest extends AbstractTest { | ||
| @Factory(dataProvider = "protocols", dataProviderClass = AbstractTest.class) | ||
| public MetricsTest(String protocol) { | ||
| super(protocol); | ||
| } | ||
|
|
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| @Test | ||
| public void testMetrics() throws Exception { | ||
| prepare(new EmptyHandler()); | ||
|
|
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| // Data structure to hold response status codes. | ||
| Map<Integer, AtomicInteger> responses = new ConcurrentHashMap<>(); | ||
|
|
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| // Data structure to hold response times. | ||
| Histogram responseTimes = new ConcurrentHistogram( | ||
| TimeUnit.MICROSECONDS.toNanos(1), | ||
| TimeUnit.MINUTES.toNanos(1), | ||
| 3 | ||
| ); | ||
|
|
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| int count = 100; | ||
| CountDownLatch latch = new CountDownLatch(count); | ||
| IntStream.range(0, count) | ||
| .parallel() | ||
| .forEach(i -> { | ||
| Request request = httpClient().newRequest(uri() + "/" + i); | ||
|
|
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| // Collect information about response status codes. | ||
| request.onResponseSuccess(rsp -> | ||
| { | ||
| int key = rsp.getStatus() / 100; | ||
| responses.computeIfAbsent(key, k -> new AtomicInteger()).incrementAndGet(); | ||
| }); | ||
|
|
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| // Collect information about response times. | ||
| request.onRequestBegin(req -> req.attribute("nanoTime", System.nanoTime())) | ||
| .onComplete(result -> { | ||
| Long nanoTime = (Long)result.getRequest().getAttributes().get("nanoTime"); | ||
| if (nanoTime != null) { | ||
| long responseTime = System.nanoTime() - nanoTime; | ||
| responseTimes.recordValue(responseTime); | ||
| } | ||
| }); | ||
|
|
||
| ReactiveRequest.newBuilder(request) | ||
| .build() | ||
| .response() | ||
| .subscribe(new Subscriber<>() { | ||
| @Override | ||
| public void onSubscribe(Subscription subscription) { | ||
| subscription.request(1); | ||
| } | ||
|
|
||
| @Override | ||
| public void onNext(ReactiveResponse reactiveResponse) { | ||
| } | ||
|
|
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| @Override | ||
| public void onError(Throwable throwable) { | ||
| } | ||
|
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| @Override | ||
| public void onComplete() { | ||
| latch.countDown(); | ||
| } | ||
| }); | ||
| }); | ||
|
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| // Wait for all the responses to arrive. | ||
| Assert.assertTrue(latch.await(10, TimeUnit.SECONDS)); | ||
|
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| System.err.println("responses = " + responses); | ||
|
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| HistogramSnapshot snapshot = new HistogramSnapshot(responseTimes, 32, "Response Times", "us", TimeUnit.NANOSECONDS::toMicros); | ||
| System.err.println(snapshot); | ||
| } | ||
| } |