| /* |
| * 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.share; |
| |
| import java.lang.management.*; |
| import javax.management.*; |
| import java.util.*; |
| import nsk.share.*; |
| |
| /** |
| * <code>ClassLoadingMonitor</code> class is a wrapper of |
| * <code>ClassLoadingMXBean</code>. Depending on command line arguments, an |
| * instance of this class redirects invocations to the |
| * <code>ClassLoadingMXBean</code> interface. If |
| * <code>-testMode="directly"</code> option is set, this instance directly |
| * invokes corresponding method of the <tt>ClassLoadingMXBean</tt> interface. If |
| * <code>-testMode="server"</code> option is set, it makes invokations via |
| * MBeanServer. If <code>-testMode="proxy"</code> option is set it will make |
| * invocations via MBeanServer proxy. |
| * |
| * @see ArgumentHandler |
| */ |
| public class ClassLoadingMonitor extends Monitor { |
| |
| // Names of the attributes of ClassLoadingMXBean |
| private static final String LOADED_CLASSES = "LoadedClassCount"; |
| private static final String TOTAL_CLASSES = "TotalLoadedClassCount"; |
| private static final String UNLOADED_CLASSES = "UnloadedClassCount"; |
| |
| // Internal trace level |
| private static final int TRACE_LEVEL = 10; |
| |
| // An instance of ClassLoadingMXBean |
| private static ClassLoadingMXBean mbean |
| = ManagementFactory.getClassLoadingMXBean(); |
| |
| private ClassLoadingMXBean proxyInstance; |
| |
| static { |
| Monitor.logPrefix = "ClassLoadingMonitor> "; |
| } |
| |
| /** |
| * Creates a new <code>ClassLoadingMonitor</code> object. |
| * |
| * @param log <code>Log</code> object to print info to. |
| * @param argumentHandler <code>ArgumentHandler</code> object that saves |
| * all info about test's arguments. |
| * |
| */ |
| public ClassLoadingMonitor(Log log, ArgumentHandler argumentHandler) { |
| super(log, argumentHandler); |
| } |
| |
| /** |
| * |
| * Return a proxy instance for a platform |
| * {@link java.lang.management.ClassLoadingMXBean |
| * <code>ClassLoadingMXBean</code>} interface. |
| * |
| */ |
| synchronized ClassLoadingMXBean getProxy() { |
| if (proxyInstance == null) { |
| // create proxy instance |
| try { |
| proxyInstance = (ClassLoadingMXBean) |
| ManagementFactory.newPlatformMXBeanProxy( |
| getMBeanServer(), |
| ManagementFactory.CLASS_LOADING_MXBEAN_NAME, |
| ClassLoadingMXBean.class |
| ); |
| } catch (java.io.IOException e) { |
| throw new Failure(e); |
| } |
| } |
| return proxyInstance; |
| } |
| |
| /** |
| * Redirects the invocation to |
| * {@link java.lang.management.ClassLoadingMXBean#getLoadedClassCount() |
| * <code>ClassLoadingMXBean.getLoadedClassCount()</code>}. |
| * |
| * @return the number of currently loaded classes. |
| */ |
| public int getLoadedClassCount() { |
| int mode = getTestMode(); |
| |
| switch (mode) { |
| case DIRECTLY_MODE: |
| logger.trace(TRACE_LEVEL,"[getLoadedClassCount] " |
| + "getLoadedClassCount() directly invoked"); |
| return mbean.getLoadedClassCount(); |
| |
| case SERVER_MODE: |
| logger.trace(TRACE_LEVEL,"[getLoadedClassCount] " |
| + "getLoadedClassCount() invoked through MBeanServer"); |
| return getIntAttribute(mbeanObjectName, LOADED_CLASSES); |
| |
| case PROXY_MODE: |
| logger.trace(TRACE_LEVEL,"[getLoadedClassCount] " |
| + "getLoadedClassCount() invoked through proxy"); |
| return getProxy().getLoadedClassCount(); |
| } |
| |
| throw new TestBug("Unknown testMode " + mode); |
| } |
| |
| /** |
| * Redirects the invocation to {@link |
| * java.lang.management.ClassLoadingMXBean#getTotalLoadedClassCount() |
| * <code>ClassLoadingMXBean.getTotalLoadedClassCount()</code>}. |
| * |
| * @return the total number of classes loaded. |
| */ |
| public long getTotalLoadedClassCount() { |
| int mode = getTestMode(); |
| |
| switch (mode) { |
| case DIRECTLY_MODE: |
| logger.trace(TRACE_LEVEL,"[getTotalLoadedClassCount] " |
| + "getTotalLoadedClassCount() directly invoked"); |
| return mbean.getTotalLoadedClassCount(); |
| |
| case SERVER_MODE: |
| logger.trace(TRACE_LEVEL,"[getTotalLoadedClassCount] " |
| + "getTotalLoadedClassCount() invoked through " |
| + "MBeanServer"); |
| return getLongAttribute(mbeanObjectName, TOTAL_CLASSES); |
| |
| case PROXY_MODE: |
| logger.trace(TRACE_LEVEL,"[getTotalLoadedClassCount] " |
| + "getTotalLoadedClassCount() invoked through proxy"); |
| return getProxy().getTotalLoadedClassCount(); |
| } |
| throw new TestBug("Unknown testMode " + mode); |
| } |
| |
| /** |
| * Redirects the invocation to |
| * {@link java.lang.management.ClassLoadingMXBean#getUnloadedClassCount() |
| * <code>ClassLoadingMXBean.getUnloadedClassCount()</code>}. |
| * |
| * @return the number of unloaded classes. |
| */ |
| public long getUnloadedClassCount() { |
| int mode = getTestMode(); |
| |
| switch (mode) { |
| case DIRECTLY_MODE: |
| logger.trace(TRACE_LEVEL,"[getUnloadedClassCount] " |
| + "getUnloadedClassCount() directly invoked"); |
| return mbean.getUnloadedClassCount(); |
| |
| case SERVER_MODE: |
| logger.trace(TRACE_LEVEL,"[getUnloadedClassCount] " |
| + "getUnloadedClassCount() invoked through MBeanServer"); |
| return getLongAttribute(mbeanObjectName, UNLOADED_CLASSES); |
| |
| case PROXY_MODE: |
| logger.trace(TRACE_LEVEL,"[getUnloadedClassCount] " |
| + "getUnloadedClassCount() invoked through proxy"); |
| return getProxy().getUnloadedClassCount(); |
| |
| } |
| |
| throw new TestBug("Unknown testMode " + mode); |
| } |
| } // ClassLoadingMonitor |