geode-core/src/main/java/org/apache/geode/cache/util/Gateway.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.cache.util;

/**
 *
 * From 9.0 old wan support is removed. Ideally Gateway (used for old wan) should be removed but it
 * it there for rolling upgrade support when GatewaySenderProfile update request comes from or sent
 * to old member. Old member uses Gateway$OrderPolicy while latest members uses
 * GatewaySender#OrderPolicy
 *
 * @since Geode 1.0
 *
 */
public class Gateway {

  /**
   * The order policy. This enum is applicable only when concurrency-level is > 1.
   *
   * @since GemFire 6.5.1
   */
  public enum OrderPolicy {
    /**
     * Indicates that events will be parallelized based on the event's originating member and thread
     */
    THREAD,
    /**
     * Indicates that events will be parallelized based on the event's key
     */
    KEY,
    /**
     * Indicates that events will be parallelized based on the event's: - partition (using the
     * PartitionResolver) in the case of a partitioned region event - key in the case of a
     * replicated region event
     */
    PARTITION
  }
}