| /* |
| * 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.cassandra.concurrent; |
| |
| import java.io.OutputStream; |
| import java.io.PrintStream; |
| import java.util.Arrays; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.junit.Assert; |
| import org.junit.BeforeClass; |
| import org.junit.Test; |
| |
| import org.apache.cassandra.config.DatabaseDescriptor; |
| import org.apache.cassandra.utils.FBUtilities; |
| |
| |
| public class SEPExecutorTest |
| { |
| @BeforeClass |
| public static void beforeClass() |
| { |
| DatabaseDescriptor.daemonInitialization(); |
| } |
| |
| @Test |
| public void shutdownTest() throws Throwable |
| { |
| for (int i = 0; i < 1000; i++) |
| { |
| shutdownOnce(i); |
| } |
| } |
| |
| private static void shutdownOnce(int run) throws Throwable |
| { |
| SharedExecutorPool sharedPool = new SharedExecutorPool("SharedPool"); |
| String MAGIC = "UNREPEATABLE_MAGIC_STRING"; |
| OutputStream nullOutputStream = new OutputStream() { |
| public void write(int b) { } |
| }; |
| PrintStream nullPrintSteam = new PrintStream(nullOutputStream); |
| |
| for (int idx = 0; idx < 20; idx++) |
| { |
| ExecutorService es = sharedPool.newExecutor(FBUtilities.getAvailableProcessors(), Integer.MAX_VALUE, "STAGE", run + MAGIC + idx); |
| // Write to black hole |
| es.execute(() -> nullPrintSteam.println("TEST" + es)); |
| } |
| |
| // shutdown does not guarantee that threads are actually dead once it exits, only that they will stop promptly afterwards |
| sharedPool.shutdownAndWait(1L, TimeUnit.MINUTES); |
| for (Thread thread : Thread.getAllStackTraces().keySet()) |
| { |
| if (thread.getName().contains(MAGIC)) |
| { |
| thread.join(100); |
| if (thread.isAlive()) |
| Assert.fail(thread + " is still running " + Arrays.toString(thread.getStackTrace())); |
| } |
| } |
| } |
| } |