content: /**
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.activemq.tool.sampler;
  
  import java.io.IOException;
  
  import org.apache.activemq.tool.reports.AbstractPerfReportWriter;
  import org.apache.activemq.tool.sampler.plugins.CpuSamplerPlugin;
  import org.apache.activemq.tool.sampler.plugins.LinuxCpuSamplerPlugin;
  
  public class CpuSamplerTask extends AbstractPerformanceSampler {
  
      private CpuSamplerPlugin plugin;
  
      public void createPlugin() throws IOException {
          createPlugin(System.getProperty("os.name"));
      }
  
      public void createPlugin(String osName) throws IOException {
          if (osName == null) {
              throw new IOException("No defined OS name found. Found: " + osName);
          }
  
          if (osName.equalsIgnoreCase(CpuSamplerPlugin.LINUX)) {
              plugin = new LinuxCpuSamplerPlugin(getInterval());
          } else {
              throw new IOException("No CPU Sampler Plugin found for OS: " + osName + ". CPU Sampler will not be started.");
          }
      }
  
      public void sampleData() {
          if (plugin != null && perfReportWriter != null) {
              perfReportWriter.writeCsvData(AbstractPerfReportWriter.REPORT_PLUGIN_CPU, "index=" + sampleIndex + "," + plugin.getCpuUtilizationStats());
          }
      }
  
      protected void onRampUpStart() {
          super.onRampUpStart();
          if (plugin != null) {
              plugin.start();
          }
      }
  
      protected void onRampDownEnd() {
          super.onRampDownEnd();
          if (plugin != null) {
              plugin.stop();
          }
      }
  }
  