| /* |
| * Copyright (c) 2004, 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. |
| */ |
| |
| /* |
| * @bug 4982289 |
| * @summary Utility class. |
| * @author Mandy Chung |
| */ |
| |
| import java.lang.management.*; |
| import java.util.*; |
| |
| public class MemoryUtil { |
| |
| private static String INDENT = " "; |
| private static String formatSize(String name, long value) { |
| StringBuffer buf = new StringBuffer(name + " = " + value); |
| if (value > 0) { |
| buf.append(" (" + (value >> 10) + "K)"); |
| } |
| return buf.toString(); |
| } |
| public static void printMemoryUsage(MemoryUsage usage) { |
| System.out.println(INDENT + formatSize("Initial size ", usage.getInit())); |
| System.out.println(INDENT + formatSize("Used size ", usage.getUsed())); |
| System.out.println(INDENT + formatSize("Committd size ", usage.getCommitted())); |
| System.out.println(INDENT + formatSize("Max size ", usage.getMax())); |
| } |
| |
| public static void printMemoryPool(MemoryPoolMXBean pool) { |
| System.out.println(INDENT + "Memory Pool name: " + pool.getName()); |
| System.out.println(INDENT + "Type: " + pool.getType()); |
| System.out.println(INDENT + "Memory Usage: " + |
| pool.getUsage()); |
| System.out.println(INDENT + "Threshold: " + |
| (pool.isUsageThresholdSupported() ? pool.getUsageThreshold() : -1)); |
| System.out.println(INDENT + "ThresholdCount: " + |
| (pool.isUsageThresholdSupported() ? pool.getUsageThresholdCount() : -1)); |
| System.out.print(INDENT + "Manager = ["); |
| String[] mgrs = pool.getMemoryManagerNames(); |
| for (int i = 0; i < mgrs.length; i++) { |
| System.out.print(mgrs[i]); |
| if (i < (mgrs.length - 1)) { |
| System.out.print(" | "); |
| } |
| } |
| System.out.println("]"); |
| } |
| |
| public static void printMemoryPools(List pools) { |
| ListIterator iter = pools.listIterator(); |
| System.out.println(INDENT + "Number of memory pools = " + pools.size()); |
| while (iter.hasNext()) { |
| MemoryPoolMXBean pool = (MemoryPoolMXBean) iter.next(); |
| printMemoryPool(pool); |
| } |
| } |
| |
| public static void printMemoryManager(MemoryManagerMXBean mgr) { |
| if (mgr instanceof GarbageCollectorMXBean) { |
| GarbageCollectorMXBean gc = (GarbageCollectorMXBean) mgr; |
| System.out.println(INDENT + "Garbage Collector name: " + gc.getName()); |
| System.out.println(INDENT + "GC Count: " + gc.getCollectionCount()); |
| System.out.println(INDENT + "GC Time : " + gc.getCollectionTime()); |
| } else { |
| System.out.println(INDENT + "Memory Manager name: " + mgr.getName()); |
| } |
| |
| System.out.print("Pool = ["); |
| String[] pools = mgr.getMemoryPoolNames(); |
| for (int i = 0; i < pools.length; i++) { |
| System.out.print(INDENT + pools[i]); |
| if (i < (pools.length - 1)) { |
| System.out.print(" | "); |
| } |
| } |
| System.out.println("]"); |
| } |
| |
| public static void printMemoryManagers(List managers) { |
| ListIterator iter = managers.listIterator(); |
| System.out.println(INDENT + "Number of memory managers = " + |
| managers.size()); |
| while (iter.hasNext()) { |
| MemoryManagerMXBean mgr = (MemoryManagerMXBean) iter.next(); |
| printMemoryManager(mgr); |
| } |
| } |
| |
| public static void printMemoryNotificationInfo |
| (MemoryNotificationInfo minfo, String type) { |
| System.out.print("Notification for " + minfo.getPoolName()); |
| System.out.print(" [type = " + type); |
| System.out.println(" count = " + minfo.getCount() + "]"); |
| System.out.println(INDENT + "usage = " + minfo.getUsage()); |
| } |
| } |