geode-core/src/main/java/org/apache/geode/internal/cache/wan/parallel/RREventIDResolver.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.wan.parallel;

import org.apache.geode.cache.EntryOperation;
import org.apache.geode.cache.PartitionResolver;
import org.apache.geode.internal.cache.EventID;

/**
 * ShadowPartitionedRegion for replicated region uses this PartitionResolver. In shadowPR for RR, we
 * are storing eventID as key into the buckets calculated from "key" of the original events. It
 * means unlike to normal scenario, in this case bucket id (in which EventIDs are added as key) is
 * different from the bucket id calculated using EventID's hashcode. To not to break the contract of
 * key and its bucket id, we are providing an internal resolver which will return a correct bucketId
 * when EventID will be used as the key in RR with PArallelGatewaySender
 *
 * We are assuming here, before calling getRoutingObejct in this Resolver, key of EntryOperation
 * i.e. EventID as already been processed by ParallelGatewaySenderImpl#setModifiedEvent where we are
 * calculating bucketId from original event's key and storing it in EventID.
 *
 */
public class RREventIDResolver implements PartitionResolver {

  @Override
  public void close() {

  }

  @Override
  public Object getRoutingObject(EntryOperation opDetails) {
    EventID eventID = (EventID) opDetails.getKey();
    return eventID.getBucketID();
  }

  @Override
  public String getName() {
    return getClass().getName();
  }

}