| /*
|
| * Copyright 1999-2011 Alibaba Group.
|
| *
|
| * 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.alibaba.dubbo.rpc.cluster; |
| |
| import java.util.List;
|
|
|
| import com.alibaba.dubbo.common.extension.SPI;
|
| import com.alibaba.dubbo.rpc.Invocation;
|
| import com.alibaba.dubbo.rpc.Invoker;
|
| import com.alibaba.dubbo.rpc.RpcException;
|
| import com.alibaba.dubbo.rpc.cluster.loadbalance.RandomLoadBalance;
|
| |
| /** |
| * LoadBalance. (SPI, Singleton, ThreadSafe) |
| * |
| * <a href="http://en.wikipedia.org/wiki/Load_balancing_(computing)">Load-Balancing</a> |
| * |
| * @see com.alibaba.dubbo.rpc.cluster.Cluster#join(Directory) |
| * @author qian.lei |
| * @author william.liangf |
| */ |
| @SPI(RandomLoadBalance.NAME) |
| public interface LoadBalance { |
| |
| /** |
| * select one invoker in list. |
| * |
| * @param invokers invokers. |
| * @param invocation invocation. |
| * @return selected invoker. |
| */ |
| <T> Invoker<T> select(List<Invoker<T>> invokers, Invocation invocation) throws RpcException; |
| |
| } |