| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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.apache.htrace.core; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.HashSet; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.concurrent.ThreadFactory; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| import org.apache.htrace.core.Tracer.Builder; |
| import org.junit.Test; |
| |
| public class TestTraceExecutor { |
| private static final int WAIT_TIME_SECONDS = 60; |
| |
| @Test |
| public void testExecutorWithNullScope() throws Exception { |
| HTraceConfiguration conf = HTraceConfiguration.fromKeyValuePairs("sampler.classes", "AlwaysSampler"); |
| ExecutorService es = null; |
| try (Tracer tracer = new Tracer.Builder("TestTraceExecutor").conf(conf).build()) { |
| es = Executors.newSingleThreadExecutor(new NamingThreadFactory()); |
| es = tracer.newTraceExecutorService(es); |
| |
| try (TraceScope scope = tracer.newScope("TestRunnable")) { |
| final AtomicReference<String> description = new AtomicReference<String>(""); |
| es.submit(new Runnable() { |
| @Override |
| public void run() { |
| description.set(Tracer.getCurrentSpan().getDescription()); |
| } |
| }).get(WAIT_TIME_SECONDS, TimeUnit.SECONDS); |
| assertEquals("TraceRunnable did not set description correctly", "child-thread-1", description.get()); |
| } |
| |
| try (TraceScope scope = tracer.newScope("TestCallable")) { |
| String description = es.submit(new Callable<String>() { |
| @Override |
| public String call() throws Exception { |
| return Tracer.getCurrentSpan().getDescription(); |
| } |
| }).get(WAIT_TIME_SECONDS, TimeUnit.SECONDS); |
| assertEquals("TraceCallable did not set description correctly", "child-thread-1", description); |
| } |
| } finally { |
| if (es != null) { |
| es.shutdown(); |
| } |
| } |
| } |
| |
| @Test |
| public void testWrappingFromSpan() throws Exception { |
| HTraceConfiguration conf = HTraceConfiguration.fromKeyValuePairs("sampler.classes", "AlwaysSampler"); |
| |
| ExecutorService es = Executors.newSingleThreadExecutor(); |
| try (Tracer tracer = new Tracer.Builder("TestTraceExecutor").conf(conf).build()) { |
| SpanId random = SpanId.fromRandom(); |
| try (TraceScope parentScope = tracer.newScope("parent")) { |
| Callable<SpanId> callable = new TraceCallable<SpanId>(tracer, random, new Callable<SpanId>() { |
| @Override |
| public SpanId call() throws Exception { |
| return Tracer.getCurrentSpan().getParents()[0]; |
| } |
| }, "child"); |
| SpanId result = es.submit(callable).get(WAIT_TIME_SECONDS, TimeUnit.SECONDS); |
| assertEquals(random, result); |
| } |
| } finally { |
| es.shutdown(); |
| } |
| } |
| |
| @Test |
| public void testScheduledExecutor() throws Exception { |
| final int TASK_COUNT = 3; |
| final int DELAY = 500; |
| |
| HTraceConfiguration conf = HTraceConfiguration.fromKeyValuePairs( |
| Tracer.SAMPLER_CLASSES_KEY, AlwaysSampler.class.getName()); |
| |
| ScheduledExecutorService ses = null; |
| Builder builder = new Tracer.Builder("TestTraceExecutor").conf(conf); |
| try (Tracer tracer = builder.build()) { |
| final ThreadFactory tf = new NamingThreadFactory(); |
| ses = Executors.newScheduledThreadPool(TASK_COUNT, tf); |
| ses = tracer.newTraceExecutorService(ses); |
| |
| final CountDownLatch startLatch = new CountDownLatch(TASK_COUNT); |
| final CountDownLatch continueLatch = new CountDownLatch(1); |
| Callable<String> task = new Callable<String>() { |
| @Override |
| public String call() throws InterruptedException { |
| startLatch.countDown(); |
| // Prevent any task from exiting until every task has started |
| assertTrue(continueLatch.await(WAIT_TIME_SECONDS, TimeUnit.SECONDS)); |
| // Annotate on the presumed child trace |
| Tracer.getCurrentSpan().addTimelineAnnotation( |
| Thread.currentThread().getName()); |
| return Tracer.getCurrentSpan().getDescription(); |
| } |
| }; |
| |
| try (TraceScope scope = tracer.newScope("TestRunnable")) { |
| Collection<Future<String>> futures = new ArrayList<>(); |
| |
| for (int i = 0; i < TASK_COUNT; i++) { |
| futures.add(ses.schedule(task, DELAY, TimeUnit.MILLISECONDS)); |
| } |
| |
| // Wait for all tasks to start |
| assertTrue(startLatch.await(WAIT_TIME_SECONDS, TimeUnit.SECONDS)); |
| continueLatch.countDown(); |
| // Collect the expected results |
| Collection<String> results = new HashSet<>(); |
| for (Future<String> future : futures) { |
| results.add(future.get(WAIT_TIME_SECONDS, TimeUnit.SECONDS)); |
| } |
| |
| assertTrue("Timeline Annotations should have gone to child traces.", |
| Tracer.getCurrentSpan().getTimelineAnnotations().isEmpty()); |
| assertEquals("Duplicated child span descriptions.", TASK_COUNT, |
| results.size()); |
| } |
| } finally { |
| if (ses != null) { |
| ses.shutdown(); |
| } |
| } |
| } |
| |
| /* |
| * Inspired by org.apache.solr.util.DefaultSolrThreadFactory |
| */ |
| static class NamingThreadFactory implements ThreadFactory { |
| private final ThreadGroup group; |
| private final AtomicInteger threadNumber = new AtomicInteger(1); |
| |
| public NamingThreadFactory() { |
| SecurityManager s = System.getSecurityManager(); |
| group = (s != null) ? s.getThreadGroup() : Thread.currentThread().getThreadGroup(); |
| } |
| |
| @Override |
| public Thread newThread(Runnable r) { |
| return new Thread(group, r, "child-thread-" + threadNumber.getAndIncrement(), 0); |
| } |
| } |
| } |