001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.camel.spi;
018
019import java.util.List;
020
021/**
022 * Allows SPIs to implement custom load balancing strategies for the Service Call EIP.
023 *
024 * @see ServiceCallServerListStrategy
025 */
026public interface ServiceCallLoadBalancer<T extends ServiceCallServer> {
027
028    /**
029     * Chooses one of the servers to use using the implemented strategy.
030     *
031     * @param servers  list of servers
032     * @return the chosen server to use.
033     */
034    T chooseServer(List<T> servers);
035
036}