001/* 002 * (C) Copyright 2011-2016 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * matic 018 */ 019package org.nuxeo.runtime.management.jvm; 020 021import java.io.File; 022import java.io.IOException; 023import java.lang.management.ManagementFactory; 024 025import javax.management.MBeanServer; 026 027import org.nuxeo.runtime.api.Framework; 028 029import com.sun.management.HotSpotDiagnosticMXBean; 030 031/** 032 * Helper to dump the heap in a temporary file. 033 * 034 * @author matic 035 * @since 5.5 036 */ 037public class HeapDumper { 038 039 private static final String HOTSPOT_NAME = "com.sun.management:type=HotSpotDiagnostic"; 040 041 public HeapDumper() throws IOException { 042 } 043 044 protected final HotSpotDiagnosticMXBean diag = newDiag(); 045 046 protected HotSpotDiagnosticMXBean newDiag() throws IOException { 047 MBeanServer mbs = ManagementFactory.getPlatformMBeanServer(); 048 return ManagementFactory.newPlatformMXBeanProxy(mbs, HOTSPOT_NAME, HotSpotDiagnosticMXBean.class); 049 } 050 051 /** 052 * Dumps heap in a temporary file and returns the file 053 * 054 * @since 5.5 055 */ 056 public File dumpHeap() throws IOException { 057 File file = Framework.createTempFile("heapdump", ".hprof"); 058 file.delete(); 059 newDiag().dumpHeap(file.getAbsolutePath(), true); 060 return file; 061 } 062 063}