src/main/java/org/apache/hadoop/chukwa/inputtools/plugin/nodeactivity/NodeActivityPlugin.java

/*
 * 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.hadoop.chukwa.inputtools.plugin.nodeactivity;


import org.apache.hadoop.chukwa.inputtools.mdl.DataConfig;
import org.apache.hadoop.chukwa.inputtools.plugin.ExecPlugin;
import org.apache.hadoop.chukwa.inputtools.plugin.IPlugin;
import org.json.simple.JSONObject;

public class NodeActivityPlugin extends ExecPlugin {
  private String cmde = null;
  private DataConfig dataConfig = null;

  public NodeActivityPlugin() {
    dataConfig = new DataConfig();
    cmde = dataConfig.get("mdl.plugin.NodeActivityPlugin.cmde");
  }

  @Override
  public String getCmde() {
    return cmde;
  }

  @Override
  public JSONObject postProcess(JSONObject execResult) {
    try {
      if ( (Integer) execResult.get("status") < 0) {
        return execResult;
      }

      String res = (String) execResult.get("stdout");

      String[] tab = res.split("\n");
      int totalFreeNode = 0;
      int totalUsedNode = 0;
      int totalDownNode = 0;

      for (int i = 0; i < tab.length; i++) {
        if (tab[i].indexOf("state =") < 0) {
          tab[i] = null;
          continue;
        }

        String[] line = tab[i].split("state =");
        tab[i] = null;

        if (line[1].trim().equals("free")) {
          totalFreeNode++;
        } else if (line[1].trim().equals("job-exclusive")) {
          totalUsedNode++;
        } else {
          totalDownNode++;
        }
      }

      execResult.put("totalFreeNode", totalFreeNode);
      execResult.put("totalUsedNode", totalUsedNode);
      execResult.put("totalDownNode", totalDownNode);
      execResult.put("source", "NodeActivity");

      execResult.put("status", 100);

    } catch (Throwable e) {
      try {
        execResult.put("source", "NodeActivity");
        execResult.put("status", -100);
        execResult.put("errorLog", e.getMessage());
      } catch (Exception e1) {
        e1.printStackTrace();
      }
      e.printStackTrace();

    }

    return execResult;
  }

  public static void main(String[] args) {
    IPlugin plugin = new NodeActivityPlugin();
    JSONObject result = plugin.execute();
    System.out.print("Result: " + result);

  }

}