geode-core/src/main/java/org/apache/geode/internal/cache/PartitionedRegionBucketMgmtHelper.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;

import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

import org.apache.geode.distributed.internal.membership.InternalDistributedMember;
import org.apache.geode.internal.cache.partitioned.Bucket;


/**
 * This class encapsulates the Bucket Related heuristics/algos for a PR.
 *
 *
 */
class PartitionedRegionBucketMgmtHelper {

  /**
   *
   * @param b Bucket to evaluate
   * @return true if it is allowed to be recovered
   * @since GemFire 5.9
   */
  static boolean bucketIsAllowedOnThisHost(Bucket b, InternalDistributedMember moveSource) {
    if (b.getDistributionManager().enforceUniqueZone()) {
      Set<InternalDistributedMember> hostingMembers = b.getBucketOwners();
      Set<InternalDistributedMember> buddyMembers =
          new HashSet(b.getDistributionManager().getMembersInThisZone());
      boolean disjoint = Collections.disjoint(hostingMembers, buddyMembers);
      boolean sourceIsOneThisHost = moveSource != null && buddyMembers.contains(moveSource);
      return disjoint || sourceIsOneThisHost;
    } else {
      return true;
    }
  }
}