com.hazelcast.spi.partitiongroup.PartitionGroupStrategy Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2024, 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.partitiongroup;
import com.hazelcast.spi.discovery.AbstractDiscoveryStrategy;
/**
* A PartitionGroupStrategy implementation defines a strategy
* how backup groups are designed. Backup groups are units containing
* one or more Hazelcast nodes to share the same physical node/machine or
* zone and backups are stored on nodes being part of a different
* backup group. This behavior builds an additional layer of data
* reliability by making sure that, in case of two zones, if zone A
* fails, zone B will still have all the backups and is guaranteed
* to still provide all data. Similar is true for nodes or physical hosts.
* Custom implementations of the PartitionGroupStrategy may add specific
* or additional behavior based on the provided environment and can
* be injected into Hazelcast by overriding
* {@link AbstractDiscoveryStrategy#getPartitionGroupStrategy()}.
*/
@FunctionalInterface
public interface PartitionGroupStrategy {
Iterable getMemberGroups();
}