| /* |
| * |
| * 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.qpid.server.signal; |
| |
| import org.apache.log4j.Logger; |
| |
| import org.apache.qpid.test.utils.QpidTestCase; |
| |
| import java.lang.management.ManagementFactory; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| |
| public class SignalHandlerTaskTest extends QpidTestCase |
| { |
| private static final Logger LOGGER = Logger.getLogger(SignalHandlerTaskTest.class); |
| private static final String SUN_MISC_SIGNAL_CLASS = "sun.misc.Signal"; |
| private static final String SUN_MISC_SIGNAL_HANDLER_CLASS = "sun.misc.SignalHandler"; |
| |
| protected void setUp() throws Exception |
| { |
| super.setUp(); |
| } |
| |
| public void testSignalHandlerTask() throws Exception |
| { |
| final boolean expectedResult = classifyExpectedRegistrationResult(); |
| final int pid = getPID(); |
| final CountDownLatch latch = new CountDownLatch(1); |
| |
| SignalHandlerTask hupReparseTask = new SignalHandlerTask() |
| { |
| public void handle() |
| { |
| latch.countDown(); |
| LOGGER.info("Signal handled, latch decremented"); |
| } |
| }; |
| |
| assertEquals("Unexpected result trying to register Signal handler", |
| expectedResult, hupReparseTask.register("HUP")); |
| LOGGER.info("Signal handler was registered"); |
| |
| assertEquals("unexpected count for the latch", 1, latch.getCount()); |
| |
| if(expectedResult) |
| { |
| //registration succeeded as expected, so now |
| //send SIGHUP and verify the handler was run |
| String cmd = "/bin/kill -SIGHUP " + pid; |
| |
| LOGGER.info("Sending SIGHUP"); |
| Runtime.getRuntime().exec(cmd); |
| |
| assertTrue("HUP Signal was not handled in the allowed timeframe", |
| latch.await(5, TimeUnit.SECONDS)); |
| } |
| } |
| |
| public void testGetPlatformDescription() throws Exception |
| { |
| assertNotNull(SignalHandlerTask.getPlatformDescription()); |
| } |
| |
| private boolean classifyExpectedRegistrationResult() |
| { |
| String os = System.getProperty("os.name"); |
| if(String.valueOf(os).toLowerCase().contains("windows")) |
| { |
| //Windows does not support SIGHUP so registration will fail |
| LOGGER.info("Running on windows, so we expect SIGHUP handler registration to fail"); |
| return false; |
| } |
| |
| //otherwise, if the signal handler classes are present we would expect |
| //registration to succeed |
| boolean classesPresent = true; |
| try |
| { |
| Class.forName(SUN_MISC_SIGNAL_CLASS); |
| Class.forName(SUN_MISC_SIGNAL_HANDLER_CLASS); |
| LOGGER.info("Signal handling classes were present so we expect SIGHUP handler registration to succeed"); |
| } |
| catch (ClassNotFoundException cnfe) |
| { |
| classesPresent = false; |
| } |
| |
| return classesPresent; |
| } |
| |
| private int getPID() |
| { |
| String processName = ManagementFactory.getRuntimeMXBean().getName(); |
| |
| int pid = Integer.parseInt(processName.substring(0,processName.indexOf('@'))); |
| LOGGER.info("PID was determined to be " + pid); |
| |
| return pid; |
| } |
| |
| } |