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/*
*
* 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;
}
}
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