com.hazelcast.spi.PostJoinAwareService Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2018, Hazelcast, 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.
*/
package com.hazelcast.spi;
/**
* Marker interface for services that want to return operations to be executed on the cluster
* members after a join has been finalized.
*/
public interface PostJoinAwareService {
/**
* Post join operations must be lock free, meaning no locks at all:
* no partition locks, no key-based locks, no service level locks, no database interaction!
* The {@link Operation#getPartitionId()} method should return a negative value.
* This means that the operations should not implement {@link PartitionAwareOperation}.
*
* Post join operations should return response, at least a {@code null} response.
*
* @return a response from the post join operation. Can be {@code null}.
*/
Operation getPostJoinOperation();
}