com.hazelcast.nio.tcp.iobalancer.MigrationStrategy Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2015, 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.nio.tcp.iobalancer;
import com.hazelcast.nio.tcp.MigratableHandler;
/**
* Decides if a {@link MigratableHandler handler} migration should be attempted
* and which handler to choose.
*
* @see IOBalancer
*
*/
interface MigrationStrategy {
/**
* Looks for imbalance in {@link MigratableHandler handler} to {@link com.hazelcast.nio.tcp.IOSelector ioSelector}
* mapping.
*
* @param imbalance
* @return true when imbalance is detected
*/
boolean imbalanceDetected(LoadImbalance imbalance);
/**
* Finds a {@link MigratableHandler handler} to migrate
*
* @param imbalance
* @return Handler to migrate or null if no suitable candidate is found
*/
MigratableHandler findHandlerToMigrate(LoadImbalance imbalance);
}