001/* 002 * (C) Copyright 2010-2014 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-2.1.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 * Nuxeo - initial API and implementation 016 */ 017 018package org.nuxeo.runtime.management.metrics; 019 020import java.io.File; 021import java.io.FileWriter; 022import java.io.IOException; 023import java.io.ObjectOutputStream; 024import java.util.Calendar; 025 026import org.javasimon.Sample; 027import org.javasimon.SimonManager; 028 029import org.nuxeo.runtime.api.Framework; 030 031import com.thoughtworks.xstream.XStream; 032 033public class MetricSerializer implements MetricSerializerMXBean { 034 035 protected File file; 036 037 protected ObjectOutputStream outputStream; 038 039 protected int count; 040 041 protected long lastUsage; 042 043 public void toStream(Sample... samples) throws IOException { 044 if (outputStream == null) { 045 return; 046 } 047 for (Sample sample : samples) { 048 outputStream.writeObject(sample); 049 } 050 count += 1; 051 lastUsage = Calendar.getInstance().getTimeInMillis(); 052 } 053 054 @Override 055 public String getOutputLocation() { 056 if (file == null) { 057 return "/dev/null"; 058 } 059 return file.getAbsolutePath(); 060 } 061 062 public File getOutputFile() { 063 return file; 064 } 065 066 @Override 067 public void resetOutput(String path) throws IOException { 068 file = new File(path); 069 resetOutput(); 070 } 071 072 @Override 073 public void resetOutput() throws IOException { 074 if (file == null) { 075 createTempFile(); 076 } 077 closeOutput(); 078 outputStream = new XStream().createObjectOutputStream(new FileWriter(file)); 079 for (String name : SimonManager.simonNames()) { 080 SimonManager.getSimon(name).reset(); 081 } 082 } 083 084 public void flushOuput() throws IOException { 085 outputStream.flush(); 086 } 087 088 @Override 089 public void closeOutput() throws IOException { 090 if (outputStream == null) { 091 return; 092 } 093 outputStream.close(); 094 outputStream = null; 095 } 096 097 private void createTempFile() throws IOException { 098 file = File.createTempFile("nx-samples-", ".xml"); 099 Framework.trackFile(file, file); 100 } 101 102 @Override 103 public int getCount() { 104 return count; 105 } 106 107 @Override 108 public long getLastUsage() { 109 return lastUsage; 110 } 111 112}