001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.activemq.tool.sampler;
018
019import java.io.IOException;
020
021import org.apache.activemq.tool.reports.AbstractPerfReportWriter;
022import org.apache.activemq.tool.sampler.plugins.CpuSamplerPlugin;
023import org.apache.activemq.tool.sampler.plugins.LinuxCpuSamplerPlugin;
024
025public class CpuSamplerTask extends AbstractPerformanceSampler {
026
027    private CpuSamplerPlugin plugin;
028
029    public void createPlugin() throws IOException {
030        createPlugin(System.getProperty("os.name"));
031    }
032
033    public void createPlugin(String osName) throws IOException {
034        if (osName == null) {
035            throw new IOException("No defined OS name found. Found: " + osName);
036        }
037
038        if (osName.equalsIgnoreCase(CpuSamplerPlugin.LINUX)) {
039            plugin = new LinuxCpuSamplerPlugin(getInterval());
040        } else {
041            throw new IOException("No CPU Sampler Plugin found for OS: " + osName + ". CPU Sampler will not be started.");
042        }
043    }
044
045    public void sampleData() {
046        if (plugin != null && perfReportWriter != null) {
047            perfReportWriter.writeCsvData(AbstractPerfReportWriter.REPORT_PLUGIN_CPU, "index=" + sampleIndex + "," + plugin.getCpuUtilizationStats());
048        }
049    }
050
051    protected void onRampUpStart() {
052        super.onRampUpStart();
053        if (plugin != null) {
054            plugin.start();
055        }
056    }
057
058    protected void onRampDownEnd() {
059        super.onRampDownEnd();
060        if (plugin != null) {
061            plugin.stop();
062        }
063    }
064}