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/*
* Copyright (c) "Neo4j"
* Neo4j Sweden AB [https://neo4j.com]
*
* 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 org.neo4j.driver.internal.cluster.loadbalancing;
import java.util.List;
import org.neo4j.driver.internal.BoltServerAddress;
/**
* A facility to select most appropriate reader or writer among the given addresses for request processing.
*/
public interface LoadBalancingStrategy {
/**
* Select most appropriate read address from the given array of addresses.
*
* @param knownReaders array of all known readers.
* @return most appropriate reader or {@code null} if it can't be selected.
*/
BoltServerAddress selectReader(List knownReaders);
/**
* Select most appropriate write address from the given array of addresses.
*
* @param knownWriters array of all known writers.
* @return most appropriate writer or {@code null} if it can't be selected.
*/
BoltServerAddress selectWriter(List knownWriters);
}
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