| /* |
| * 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.brooklyn.camp.brooklyn; |
| |
| import static org.testng.Assert.assertTrue; |
| |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| |
| import org.apache.brooklyn.api.entity.Entity; |
| import org.apache.brooklyn.core.test.entity.TestEntity; |
| import org.apache.brooklyn.test.Asserts; |
| import org.apache.brooklyn.util.core.task.Tasks; |
| import org.apache.brooklyn.util.time.Duration; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.testng.annotations.AfterMethod; |
| import org.testng.annotations.BeforeMethod; |
| import org.testng.annotations.Test; |
| |
| import com.google.common.base.Joiner; |
| import com.google.common.collect.Iterables; |
| |
| @Test |
| public class DependentConfigPollingYamlTest extends AbstractYamlTest { |
| private static final Logger log = LoggerFactory.getLogger(DependentConfigPollingYamlTest.class); |
| |
| private ExecutorService executor; |
| |
| @BeforeMethod(alwaysRun = true) |
| @Override |
| public void setUp() { |
| super.setUp(); |
| executor = Executors.newCachedThreadPool(); |
| } |
| |
| @AfterMethod(alwaysRun = true) |
| @Override |
| public void tearDown() { |
| if (executor != null) executor.shutdownNow(); |
| super.tearDown(); |
| } |
| |
| // Test for BROOKLYN-214. Previously, the brief Tasks.resolving would cause a thread to be |
| // leaked. This was because it would call into BrooklynDslDeferredSupplier.get, which would |
| // wait on a synchronized block and thus not be interruptible - the thread would be consumed |
| // forever, until the attributeWhenReady returned true! |
| // |
| // Integration test, because takes several seconds. |
| @Test(groups="Integration") |
| public void testResolveAttributeWhenReadyWithTimeoutDoesNotLeaveThreadRunning() throws Exception { |
| String yaml = Joiner.on("\n").join( |
| "services:", |
| "- type: org.apache.brooklyn.core.test.entity.TestEntity", |
| " id: myentity", |
| " brooklyn.config:", |
| " test.confName: $brooklyn:entity(\"myentity\").attributeWhenReady(\"mysensor\")"); |
| |
| final Entity app = createAndStartApplication(yaml); |
| final TestEntity entity = (TestEntity) Iterables.getOnlyElement(app.getChildren()); |
| |
| // Cause a thread to block, getting the config - previousy (before fixing 214) this would be in |
| // the synchronized block if BrooklynDslDeferredSupplier.get(). |
| // The sleep is to ensure we really did get into the locking code. |
| executor.submit(new Callable<Object>() { |
| public Object call() { |
| return entity.config().get(TestEntity.CONF_NAME); |
| }}); |
| Thread.sleep(100); |
| |
| // Try to resolve the value many times, each in its own task, but with a short timeout for each. |
| final int numIterations = 20; |
| final int preNumThreads = Thread.activeCount(); |
| |
| for (int i = 0; i < numIterations; i++) { |
| // Same as RestValueResolver.getImmediateValue |
| Tasks.resolving(entity.config().getRaw(TestEntity.CONF_NAME).get()) |
| .as(Object.class) |
| .defaultValue("UNRESOLVED") |
| .timeout(Duration.millis(100)) |
| .context(entity) |
| .swallowExceptions() |
| .get(); |
| } |
| |
| // Confirm we haven't left threads behind. |
| Asserts.succeedsEventually(new Runnable() { |
| public void run() { |
| int postNumThreads = Thread.activeCount(); |
| String msg = "pre="+preNumThreads+"; post="+postNumThreads+"; iterations="+numIterations; |
| log.info(msg); |
| assertTrue(postNumThreads < preNumThreads + (numIterations / 2), msg); |
| }}); |
| } |
| |
| @Override |
| protected Logger getLogger() { |
| return log; |
| } |
| } |