core/src/main/java/org/apache/hadoop/chukwa/inputtools/mdl/ErStreamHandler.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.mdl;


import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.BufferedReader;
import java.nio.charset.Charset;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class ErStreamHandler extends Thread {
  InputStream inpStr;
  String command;
  boolean record;

  private static Log log = LogFactory.getLog(ErStreamHandler.class);

  public ErStreamHandler(InputStream inpStr, String command, boolean record) {
    this.inpStr = inpStr;
    this.command = command;
    this.record = record;

  }

  public void run() {
    try {
      InputStreamReader inpStrd = new InputStreamReader(inpStr, Charset.forName("UTF-8"));
      BufferedReader buffRd = new BufferedReader(inpStrd);
      String line = null;
      StringBuffer sb = new StringBuffer();
      while ((line = buffRd.readLine()) != null) {
        sb.append(line);
      }
      buffRd.close();

      if (record && sb.length() > 0) {
        log.error(command + " execution error:" + sb.toString());
      }

    } catch (Exception e) {
      log.error(command + " error:" + e.getMessage());
    }
  }

}