001/*
002 * (C) Copyright 2010-2014 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 *     Nuxeo - initial API and implementation
018 */
019
020package org.nuxeo.runtime.management.metrics;
021
022import java.io.File;
023import java.io.FileWriter;
024import java.io.IOException;
025import java.io.ObjectOutputStream;
026import java.io.Writer;
027import java.util.Calendar;
028
029import org.javasimon.Sample;
030import org.javasimon.SimonManager;
031
032import org.nuxeo.runtime.api.Framework;
033
034import com.thoughtworks.xstream.XStream;
035
036//@deprecated since 11.4: use dropwizard metrics instead
037@Deprecated(since = "11.4")
038public class MetricSerializer implements MetricSerializerMXBean {
039
040    protected File file;
041
042    protected ObjectOutputStream outputStream;
043
044    protected int count;
045
046    protected long lastUsage;
047
048    public void toStream(Sample... samples) throws IOException {
049        if (outputStream == null) {
050            return;
051        }
052        for (Sample sample : samples) {
053            outputStream.writeObject(sample);
054        }
055        count += 1;
056        lastUsage = Calendar.getInstance().getTimeInMillis();
057    }
058
059    @Override
060    public String getOutputLocation() {
061        if (file == null) {
062            return "/dev/null";
063        }
064        return file.getAbsolutePath();
065    }
066
067    public File getOutputFile() {
068        return file;
069    }
070
071    @Override
072    public void resetOutput(String path) throws IOException {
073        file = new File(path);
074        resetOutput();
075    }
076
077    @Override
078    public void resetOutput() throws IOException {
079        if (file == null) {
080            createTempFile();
081        }
082        closeOutput();
083        @SuppressWarnings("resource") // Writer closed by outputStream.close()
084        Writer writer = new FileWriter(file);
085        outputStream = new XStream().createObjectOutputStream(writer);
086        for (String name : SimonManager.simonNames()) {
087            SimonManager.getSimon(name).reset();
088        }
089    }
090
091    public void flushOuput() throws IOException {
092        outputStream.flush();
093    }
094
095    @Override
096    public void closeOutput() throws IOException {
097        if (outputStream == null) {
098            return;
099        }
100        outputStream.close();
101        outputStream = null;
102    }
103
104    private void createTempFile() throws IOException {
105        file = Framework.createTempFile("nx-samples-", ".xml");
106        Framework.trackFile(file, file);
107    }
108
109    @Override
110    public int getCount() {
111        return count;
112    }
113
114    @Override
115    public long getLastUsage() {
116        return lastUsage;
117    }
118
119}