WebHdfsPersistWriterTask.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
 *
 *   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.streams.hdfs;

import org.apache.streams.core.StreamsDatum;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Random;

/**
 * WebHdfsPersistReaderTask writes to hdfs on behalf of
 * @see org.apache.streams.hdfs.WebHdfsPersistWriter
 */
public class WebHdfsPersistWriterTask implements Runnable {

  private static final Logger LOGGER = LoggerFactory.getLogger(WebHdfsPersistWriterTask.class);

  private WebHdfsPersistWriter writer;

  public WebHdfsPersistWriterTask(WebHdfsPersistWriter writer) {
    this.writer = writer;
  }

  @Override
  public void run() {

    while (true) {
      if ( writer.persistQueue.peek() != null ) {
        try {
          StreamsDatum entry = writer.persistQueue.remove();
          writer.write(entry);
        } catch (Exception e) {
          e.printStackTrace();
        }
      }
      try {
        Thread.sleep(new Random().nextInt(1));
      } catch (InterruptedException e) {}
    }

  }

}