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/*
* Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package nsk.monitoring.stress.classload;
import java.io.*;
import java.util.*;
import java.lang.management.*;
import nsk.share.test.*;
import nsk.share.*;
import nsk.monitoring.share.*;
/**
* The test checks up <code>getAllClasses()</code>,
* <code>getLoadedClassCount()</code>, <code>getTotalLoadedClassCount()</code>,
* <code>getUnloadedClassCount()</code> methods after unloading classes for
* specified parameters such as:
* <ul>
* <li>
* <code>${COMMON_CLASSES_LOCATION}/newclass</code> - path that
* contains precompiled loadable classes for which class
* loading/unloading is performed. The newclass path should not be
* included into <code>CLASSPATH</code> to avoid spontaneous loading
* of these classes.
* <li>
* <code>loadedClassCount</code> - number of loadable classes.
* <li>
* <code>loaderCount</code> - number of class loaders.
* </ul>
*
* <p>The other parameters which may have an influence on running test are:
* <ul>
* <li>
* <code>testMode</code> defines an execution mode either for
* the <code>ClassLoadingMBean</code> interface or for the
* <code>ClassLoadingMetrics</code> interface.
* <li>
* <code>MBeanServer</code> defines a MBean server implemetation
* under which test is executed.
* <li>
* <code>singleClassloaderClass</code> specifies whether class loaders
* are instances of the same class.
* </ul>
* For details about arguments, see the {@link
* nsk.monitoring.share.ArgumentHamdler ArgumentHamdler} description .
*
* <p>The test loads classes according to specified parameters. After classes
* have been loaded, the test makes an initial snapshot of class loading metrics
* and tries to unload these classes. Then it makes snapshot of class loading
* metrics again and compare them with initial values.
*
* <p>It is expected that <code>getLoadedClassCount()</code> and
* <code>getTotalLoadedClassCount()</code> must be decreased by
* <code>loadedClassCount * loaderCount</code> after unloading.
*
* <p>The test also fails if a list returned by <code>getAllClasses()</code>
* contains any pair of names (loadable class name, class loader name) or size
* of this list is not equal to <code>getLoadedClassCount()</code>.
*
*/
public class unload001 extends MonitoringTestBase implements Initializable {
private ClassLoadingMXBean classLoading;
private ClassLoadingController controller;
private int loadedClassCount;
private int loaderCount;
private final String ERR = "Unexpected value:: ";
private long currentlyUnLoadedClassCount = 0;
private long initialClassCount;
private long initialTotalClassCount;
private long initialUnloadedClassCount;
private Stresser stresser;
public unload001(Stresser stresser) {
this.stresser = stresser;
}
public void initialize() {
argHandler.dump(log);
classLoading = monitoringFactory.getClassLoadingMXBean();
}
public void run() {
boolean result = true;
loadedClassCount = argHandler.getLoadableClassesCount();
loaderCount = argHandler.getLoadersCount();
stresser.start(loaderCount);
controller = new ClassLoadingController(log, argHandler, stresser);
log.info("\nclass loading...");
controller.loadClasses();
//extra request for metrics to exclude undesirable class loading
//during test execution.
initialClassCount = classLoading.getLoadedClassCount();
initialTotalClassCount = classLoading.getTotalLoadedClassCount();
initialUnloadedClassCount = classLoading.getUnloadedClassCount();
log.info("\nTEST STARTED");
initialClassCount = classLoading.getLoadedClassCount();
initialTotalClassCount = classLoading.getTotalLoadedClassCount();
initialUnloadedClassCount = classLoading.getUnloadedClassCount();
log.info("\nInitial values:");
log.info("---------------");
showValues(initialClassCount, initialTotalClassCount,
initialUnloadedClassCount);
log.info("\nclass unloading...");
currentlyUnLoadedClassCount = controller.unloadClasses();
long classCount = classLoading.getLoadedClassCount();
long totalClassCount = classLoading.getTotalLoadedClassCount();
long unloadedClassCount = classLoading.getUnloadedClassCount();
log.info("\nAmount of currently loaded classes:");
log.info("-----------------------------------");
showValues(/*classNames, */classCount, totalClassCount,
unloadedClassCount);
log.info("\nchecking loaded classes...");
result = result & checkValues(classCount, totalClassCount, unloadedClassCount);
if (result) {
log.info("Test PASSED");
} else {
log.info("Test FAILED");
setFailed(true);
}
}
public static void main(String[] args) {
Monitoring.runTest(new unload001(new Stresser(args)), args);
}
private void showValues(long classCount, long totalClassCount, long unloadedClassCount) {
log.info("\ttotal loaded class count = " + totalClassCount);
log.info("\tcurrently loaded class count = " + classCount);
log.info("\tunloaded class count = " + unloadedClassCount);
}
private boolean checkValues(long classCount, long totalClassCount, long unloadedClassCount) {
boolean res = true;
// We don't check for inequality here because totalClassCount can be greater than
// initialTotalClassCount due to Lambda classes generation in controller.unloadClasses()
long expectedValue = initialTotalClassCount;
if (totalClassCount < expectedValue) {
log.error(ERR + "total loaded class count=" + totalClassCount
+ " Expected value: "
+ expectedValue);
res = false;
}
expectedValue = classCount + unloadedClassCount;
if (totalClassCount != expectedValue) {
log.error(ERR + "total loaded class count=" + totalClassCount
+ " Expected value(classCount + "
+ "unloadedClassCount): " + expectedValue);
res = false;
}
if (currentlyUnLoadedClassCount > unloadedClassCount) {
log.error(ERR + "unloaded class count=" + unloadedClassCount
+ " Expected value at least "
+ currentlyUnLoadedClassCount);
res = false;
}
return res;
}
}
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