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/*
 * Copyright (c) 2010-2015 Pivotal Software, Inc. All rights reserved.
 *
 * 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. See accompanying
 * LICENSE file.
 */
package com.gemstone.gemfire.internal.cache.wan.parallel;

import com.gemstone.gemfire.cache.EntryOperation;
import com.gemstone.gemfire.cache.PartitionResolver;
import com.gemstone.gemfire.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 {

  public void close() {

  }

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

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

}