samoa-s4/src/main/java/org/apache/samoa/topology/impl/S4ComponentFactory.java

package org.apache.samoa.topology.impl;

/*
 * #%L
 * SAMOA
 * %%
 * Copyright (C) 2014 - 2015 Apache Software Foundation
 * %%
 * Licensed 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.
 * #L%
 */

import org.apache.samoa.core.EntranceProcessor;
import org.apache.samoa.core.Processor;
import org.apache.samoa.topology.ComponentFactory;
import org.apache.samoa.topology.EntranceProcessingItem;
import org.apache.samoa.topology.IProcessingItem;
import org.apache.samoa.topology.ProcessingItem;
import org.apache.samoa.topology.Stream;
import org.apache.samoa.topology.Topology;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * S4 Platform Component Factory
 * 
 * @author severien
 * 
 */
public class S4ComponentFactory implements ComponentFactory {

  public static final Logger logger = LoggerFactory.getLogger(S4ComponentFactory.class);
  protected S4DoTask app;

  @Override
  public ProcessingItem createPi(Processor processor, int paralellism) {
    S4ProcessingItem processingItem = new S4ProcessingItem(app);
    // TODO refactor how to set the paralellism level
    processingItem.setParalellismLevel(paralellism);
    processingItem.setProcessor(processor);

    return processingItem;
  }

  @Override
  public ProcessingItem createPi(Processor processor) {
    return this.createPi(processor, 1);
  }

  @Override
  public EntranceProcessingItem createEntrancePi(EntranceProcessor entranceProcessor) {
    // TODO Create source Entry processing item that connects to an external
    // stream
    S4EntranceProcessingItem entrancePi = new S4EntranceProcessingItem(entranceProcessor, app);
    entrancePi.setParallelism(1); // FIXME should not be set to 1 statically
    return entrancePi;
  }

  @Override
  public Stream createStream(IProcessingItem sourcePi) {
    S4Stream aStream = new S4Stream(app);
    return aStream;
  }

  @Override
  public Topology createTopology(String topoName) {
    return new S4Topology(topoName);
  }

  /**
   * Initialization method.
   * 
   * @param evalTask
   */
  public void init(String evalTask) {
    // Task is initiated in the DoTaskApp
  }

  /**
   * Sets S4 application.
   * 
   * @param app
   */
  public void setApp(S4DoTask app) {
    this.app = app;
  }
}