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JPPF, the open source grid computing solution
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/*
 * JPPF.
 * Copyright (C) 2005-2015 JPPF Team.
 * http://www.jppf.org
 *
 * 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.
 */

package org.jppf.load.balancer;

import org.jppf.management.JPPFSystemInformation;
import org.jppf.node.protocol.JPPFDistributedJob;

/**
 * 
 * @author Laurent Cohen
 * @exclude
 */
public abstract class AbstractAdaptiveBundler extends AbstractBundler implements BundlerEx, NodeAwareness, ContextAwareness, JobAwarenessEx {
  /**
   * The current bundle size.
   */
  protected int bundleSize = 1;
  /**
   * Holds information about the node's environment and configuration.
   */
  protected JPPFSystemInformation nodeConfiguration;
  /**
   * The number of processing threads in the node.
   */
  protected int nbThreads = 1;
  /**
   * Holds information about the execution context.
   */
  protected JPPFContext jppfContext;
  /**
   * Holds information about the current job being dispatched.
   */
  protected JPPFDistributedJob job;

  /**
   * Creates a new instance with the specified parameters profile.
   * @param profile the parameters of the load-balancing algorithm.
   */
  public AbstractAdaptiveBundler(final LoadBalancingProfile profile) {
    super(profile);
  }

  @Override
  public int getBundleSize() {
    return bundleSize;
  }

  @Override
  public JPPFSystemInformation getNodeConfiguration() {
    return nodeConfiguration;
  }

  @Override
  public void setNodeConfiguration(final JPPFSystemInformation nodeConfiguration) {
    this.nodeConfiguration = nodeConfiguration;
    nbThreads = nodeConfiguration.getJppf().getInt("jppf.processing.threads", 1);
  }

  @Override
  public void feedback(final int size, final double totalTime, final double accumulatedElapsed, final double overheadTime) {
    int n1 = size / nbThreads;
    int n2 = size % nbThreads;
    double mean = accumulatedElapsed / size;
    double t = 0d;
    if (n1 == 0) t = mean;
    else {
      t = n1 * mean;
      if (n2 > 0) t += mean * ((double) n2 / nbThreads);
    }
    t += overheadTime;
    feedback(size, t);
  }

  @Override
  public JPPFContext getJPPFContext() {
    return jppfContext;
  }

  @Override
  public void setJPPFContext(final JPPFContext context) {
    this.jppfContext = context;
  }

  @Override
  public JPPFDistributedJob getJob() {
    return job;
  }

  @Override
  public void setJob(final JPPFDistributedJob job) {
    this.job = job;
  }

  @Override
  public Bundler copy() {
    return null;
  }

  @Override
  protected int maxSize() {
    return 0;
  }

  @Override
  public void dispose() {
    nodeConfiguration = null;
    jppfContext = null;
    job = null;
  }
}