1/* 2 * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24/* 25 * @bug 4982289 26 * @summary Utility class. 27 * @author Mandy Chung 28 */ 29 30import java.lang.management.*; 31import java.util.*; 32 33public class MemoryUtil { 34 35 private static String INDENT = " "; 36 private static String formatSize(String name, long value) { 37 StringBuffer buf = new StringBuffer(name + " = " + value); 38 if (value > 0) { 39 buf.append(" (" + (value >> 10) + "K)"); 40 } 41 return buf.toString(); 42 } 43 public static void printMemoryUsage(MemoryUsage usage) { 44 System.out.println(INDENT + formatSize("Initial size ", usage.getInit())); 45 System.out.println(INDENT + formatSize("Used size ", usage.getUsed())); 46 System.out.println(INDENT + formatSize("Committd size ", usage.getCommitted())); 47 System.out.println(INDENT + formatSize("Max size ", usage.getMax())); 48 } 49 50 public static void printMemoryPool(MemoryPoolMXBean pool) { 51 System.out.println(INDENT + "Memory Pool name: " + pool.getName()); 52 System.out.println(INDENT + "Type: " + pool.getType()); 53 System.out.println(INDENT + "Memory Usage: " + 54 pool.getUsage()); 55 System.out.println(INDENT + "Threshold: " + 56 (pool.isUsageThresholdSupported() ? pool.getUsageThreshold() : -1)); 57 System.out.println(INDENT + "ThresholdCount: " + 58 (pool.isUsageThresholdSupported() ? pool.getUsageThresholdCount() : -1)); 59 System.out.print(INDENT + "Manager = ["); 60 String[] mgrs = pool.getMemoryManagerNames(); 61 for (int i = 0; i < mgrs.length; i++) { 62 System.out.print(mgrs[i]); 63 if (i < (mgrs.length - 1)) { 64 System.out.print(" | "); 65 } 66 } 67 System.out.println("]"); 68 } 69 70 public static void printMemoryPools(List pools) { 71 ListIterator iter = pools.listIterator(); 72 System.out.println(INDENT + "Number of memory pools = " + pools.size()); 73 while (iter.hasNext()) { 74 MemoryPoolMXBean pool = (MemoryPoolMXBean) iter.next(); 75 printMemoryPool(pool); 76 } 77 } 78 79 public static void printMemoryManager(MemoryManagerMXBean mgr) { 80 if (mgr instanceof GarbageCollectorMXBean) { 81 GarbageCollectorMXBean gc = (GarbageCollectorMXBean) mgr; 82 System.out.println(INDENT + "Garbage Collector name: " + gc.getName()); 83 System.out.println(INDENT + "GC Count: " + gc.getCollectionCount()); 84 System.out.println(INDENT + "GC Time : " + gc.getCollectionTime()); 85 } else { 86 System.out.println(INDENT + "Memory Manager name: " + mgr.getName()); 87 } 88 89 System.out.print("Pool = ["); 90 String[] pools = mgr.getMemoryPoolNames(); 91 for (int i = 0; i < pools.length; i++) { 92 System.out.print(INDENT + pools[i]); 93 if (i < (pools.length - 1)) { 94 System.out.print(" | "); 95 } 96 } 97 System.out.println("]"); 98 } 99 100 public static void printMemoryManagers(List managers) { 101 ListIterator iter = managers.listIterator(); 102 System.out.println(INDENT + "Number of memory managers = " + 103 managers.size()); 104 while (iter.hasNext()) { 105 MemoryManagerMXBean mgr = (MemoryManagerMXBean) iter.next(); 106 printMemoryManager(mgr); 107 } 108 } 109 110 public static void printMemoryNotificationInfo 111 (MemoryNotificationInfo minfo, String type) { 112 System.out.print("Notification for " + minfo.getPoolName()); 113 System.out.print(" [type = " + type); 114 System.out.println(" count = " + minfo.getCount() + "]"); 115 System.out.println(INDENT + "usage = " + minfo.getUsage()); 116 } 117} 118