StreamsMergeTask.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.local.tasks;

import org.apache.streams.config.StreamsConfiguration;
import org.apache.streams.core.StreamsDatum;
import org.apache.streams.local.counters.StreamsTaskCounter;

import org.apache.commons.lang.NotImplementedException;

import java.util.concurrent.atomic.AtomicBoolean;

/**
 * NOT USED.  When joins/partions are implemented, a similar pattern could be followed. Done only as basic proof
 * of concept.
 * NEEDS TO BE RE-WRITTEN
 */
@Deprecated
public class StreamsMergeTask extends BaseStreamsTask {

  private AtomicBoolean keepRunning;
  private long sleepTime;

  public StreamsMergeTask() {
    this(null);
  }

  public StreamsMergeTask(StreamsConfiguration streamConfig) {
    super(streamConfig);
    this.sleepTime = sleepTime;
    this.keepRunning = new AtomicBoolean(true);
  }

  @Override
  public void stopTask() {
    this.keepRunning.set(false);
  }

  @Override
  public void setStreamConfig(StreamsConfiguration config) {

  }

  @Override
  public boolean isRunning() {
    return false;
  }

  @Override
  public void run() {
    while(this.keepRunning.get()) {
      StreamsDatum datum = super.getNextDatum();
      if(datum != null) {
        try {
          super.addToOutgoingQueue(datum);
        } catch (InterruptedException ie) {
          Thread.currentThread().interrupt();
        }
      }
      else {
        try {
          Thread.sleep(this.sleepTime);
        } catch (InterruptedException e) {
          this.keepRunning.set(false);
        }
      }
    }
  }

  @Override
  public void setStreamsTaskCounter(StreamsTaskCounter counter) {
    throw new NotImplementedException();
  }
}