package org.apache.helix.healthcheck;
   
   /*
    * 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.
   */
  
  import java.lang.management.ManagementFactory;
  import java.lang.management.OperatingSystemMXBean;
  import java.util.HashMap;
  import java.util.Map;
  import java.util.TreeMap;
  
  import org.apache.helix.ZNRecord;
  import org.apache.log4j.Logger;
  
  
  class DefaultHealthReportProvider extends HealthReportProvider
  {
    private static final Logger _logger = Logger
        .getLogger(DefaultHealthReportProvider.class);
  
    public final static String _availableCPUs = "availableCPUs";
    public final static String _freePhysicalMemory = "freePhysicalMemory";
    public final static String _totalJvmMemory = "totalJvmMemory";
    public final static String _freeJvmMemory = "freeJvmMemory";
    public final static String _averageSystemLoad = "averageSystemLoad";
  
    public DefaultHealthReportProvider()
    {
    }
  
    @Override
    public Map<String, String> getRecentHealthReport()
    {
      OperatingSystemMXBean osMxBean = ManagementFactory
          .getOperatingSystemMXBean();
      long freeJvmMemory = Runtime.getRuntime().freeMemory();
      long totalJvmMemory = Runtime.getRuntime().totalMemory();
      int availableCPUs = osMxBean.getAvailableProcessors();
      double avgSystemLoad = osMxBean.getSystemLoadAverage();
      long freePhysicalMemory = Long.MAX_VALUE;
  
      try
      {
        // if( osMxBean instanceof com.sun.management.OperatingSystemMXBean)
        // {
        // com.sun.management.OperatingSystemMXBean sunOsMxBean
        // = (com.sun.management.OperatingSystemMXBean) osMxBean;
        // freePhysicalMemory = sunOsMxBean.getFreePhysicalMemorySize();
        // }
      }
      catch (Throwable t)
      {
        _logger.error(t);
      }
  
      Map<String, String> result = new TreeMap<String, String>();
  
      result.put(_availableCPUs, "" + availableCPUs);
      result.put(_freePhysicalMemory, "" + freePhysicalMemory);
      result.put(_freeJvmMemory, "" + freeJvmMemory);
      result.put(_totalJvmMemory, "" + totalJvmMemory);
      result.put(_averageSystemLoad, "" + avgSystemLoad);
  
      return result;
    }
  
    @Override
    public Map<String, Map<String, String>> getRecentPartitionHealthReport()
    {
      Map<String, Map<String, String>> result = new HashMap<String, Map<String, String>>();
      
      result.put(getReportName(), getRecentHealthReport());
      return result;
    }
  
    @Override
    public void resetStats()
    {
      // TODO Auto-generated method stub
  
    }
  }