geode-core/src/main/java/org/apache/geode/internal/cache/partitioned/rebalance/FPRDirector.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.geode.internal.cache.partitioned.rebalance;

import org.apache.geode.internal.cache.partitioned.rebalance.model.PartitionedRegionLoadModel;

/**
 * The FPR director performs rebalancing operations for a fixed partitioned region. There two things
 * a fixed partitioned region does during rebalancing: - Create redundant buckets in a known
 * location - move primaries to the appropriate member.
 *
 * Note that unlike other directors, this director performs all the work in a call to nextStep.
 *
 *
 */
public class FPRDirector extends RebalanceDirectorAdapter {

  private boolean initialSatisfyRedundancy;
  private boolean initialMovePrimaries;

  private boolean satisfyRedundancy;
  private boolean movePrimaries;

  private final SatisfyRedundancyFPR satisfyRedundancyDirector = new SatisfyRedundancyFPR();
  private final MovePrimariesFPR movePrimariesDirector = new MovePrimariesFPR();

  private PartitionedRegionLoadModel model;

  public FPRDirector(boolean initialSatisfyRedundancy, boolean initialMovePrimaries) {
    this.initialSatisfyRedundancy = initialSatisfyRedundancy;
    this.initialMovePrimaries = initialMovePrimaries;
  }

  @Override
  public void initialize(PartitionedRegionLoadModel model) {
    this.model = model;
    this.satisfyRedundancy = initialSatisfyRedundancy;
    this.movePrimaries = initialMovePrimaries;
    this.satisfyRedundancyDirector.initialize(model);
    this.movePrimariesDirector.initialize(model);
  }

  @Override
  public void membershipChanged(PartitionedRegionLoadModel model) {
    initialize(model);
  }

  @Override
  public boolean nextStep() {

    if (this.satisfyRedundancy) {
      satisfyRedundancyDirector.nextStep();
    }

    if (this.movePrimaries) {
      movePrimariesDirector.nextStep();
    }

    return false;
  }

}