001/* 002 * (C) Copyright 2011 Nuxeo SA (http://nuxeo.com/) and contributors. 003 * 004 * All rights reserved. This program and the accompanying materials 005 * are made available under the terms of the GNU Lesser General Public License 006 * (LGPL) version 2.1 which accompanies this distribution, and is available at 007 * http://www.gnu.org/licenses/lgpl.html 008 * 009 * This library is distributed in the hope that it will be useful, 010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 * Lesser General Public License for more details. 013 * 014 * Contributors: 015 * matic 016 */ 017package org.nuxeo.runtime.management.jvm; 018 019import java.io.File; 020import java.io.IOException; 021import java.lang.management.ManagementFactory; 022 023import javax.management.MBeanServer; 024 025import com.sun.management.HotSpotDiagnosticMXBean; 026 027/** 028 * Helper to dump the heap in a temporary file. 029 * 030 * @author matic 031 * @since 5.5 032 */ 033public class HeapDumper { 034 035 private static final String HOTSPOT_NAME = "com.sun.management:type=HotSpotDiagnostic"; 036 037 public HeapDumper() throws IOException { 038 } 039 040 protected final HotSpotDiagnosticMXBean diag = newDiag(); 041 042 protected HotSpotDiagnosticMXBean newDiag() throws IOException { 043 MBeanServer mbs = ManagementFactory.getPlatformMBeanServer(); 044 return ManagementFactory.newPlatformMXBeanProxy(mbs, HOTSPOT_NAME, HotSpotDiagnosticMXBean.class); 045 } 046 047 /** 048 * Dumps heap in a temporary file and returns the file 049 * 050 * @since 5.5 051 * @throws IOException 052 */ 053 public File dumpHeap() throws IOException { 054 File file = File.createTempFile("heapdump", ".hprof"); 055 file.delete(); 056 newDiag().dumpHeap(file.getAbsolutePath(), true); 057 return file; 058 } 059 060}