src/main/java/org/apache/hadoop/chukwa/datacollection/test/ConsoleOutConnector.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.datacollection.test;


import org.apache.hadoop.chukwa.Chunk;
import org.apache.hadoop.chukwa.datacollection.*;
import org.apache.hadoop.chukwa.datacollection.agent.*;
import org.apache.hadoop.chukwa.datacollection.connector.Connector;

import java.nio.charset.Charset;
import java.util.*;

/**
 * Output events to stdout. Intended for debugging use.
 * 
 */
public class ConsoleOutConnector extends Thread implements Connector {

  final ChukwaAgent agent;
  volatile boolean shutdown;
  final boolean silent;

  public ConsoleOutConnector(ChukwaAgent a) {
    this(a, false);
  }

  public ConsoleOutConnector(ChukwaAgent a, boolean silent) {
    agent = a;
    this.silent = silent;
  }

  public void run() {
    try {
      System.out.println("console connector started");
      ChunkQueue eventQueue = DataFactory.getInstance().getEventQueue();
      if (!silent)
        System.out.println("-------------------");

      while (!shutdown) {
        List<Chunk> evts = new ArrayList<Chunk>();
        eventQueue.collect(evts, 1);

        for (Chunk e : evts) {
          if (!silent) {
            System.out.println("Console out connector got event at offset "
                + e.getSeqID());
            System.out.println("data type was " + e.getDataType());
            if (e.getData().length > 1000)
              System.out.println("data length was " + e.getData().length
                  + ", not printing");
            else
              System.out.println(new String(e.getData(), Charset.forName("UTF-8")));
          }

          agent.reportCommit(e.getInitiator(), e.getSeqID());

          if (!silent)
            System.out.println("-------------------");
        }
      }
    } catch (InterruptedException e) {
    } // thread is about to exit anyway
  }

  public void shutdown() {
    shutdown = true;
    this.interrupt();
  }

  @Override
  public void reloadConfiguration() {
    System.out.println("reloadConfiguration");
  }

}