| /*
|
| * 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.support; |
| |
| import java.util.List; |
| |
| import com.alibaba.dubbo.common.Extension; |
| import com.alibaba.dubbo.common.Version; |
| import com.alibaba.dubbo.common.utils.NetUtils; |
| import com.alibaba.dubbo.rpc.Invocation; |
| import com.alibaba.dubbo.rpc.Invoker; |
| import com.alibaba.dubbo.rpc.Result; |
| import com.alibaba.dubbo.rpc.RpcException; |
| import com.alibaba.dubbo.rpc.cluster.Directory; |
| import com.alibaba.dubbo.rpc.cluster.LoadBalance; |
| |
| /** |
| * 快速失败,只发起一次调用,失败立即报错,通常用于非幂等性的写操作。</br> |
| * <a href="http://en.wikipedia.org/wiki/Fail-fast">Fail-fast</a> |
| * |
| * @author william.liangf |
| * @author chao.liuc |
| * |
| */ |
| public class FailfastClusterInvoker<T> extends AbstractClusterInvoker<T>{ |
| public FailfastClusterInvoker(Directory<T> directory) { |
| super(directory); |
| } |
| |
| public Result doInvoke(Invocation invocation, List<Invoker<T>> invokers, LoadBalance loadbalance) throws RpcException { |
| if (invokers == null || invokers.size() == 0)
|
| throw new RpcException("No provider available for service " + getInterface().getName() + " on consumer " + NetUtils.getLocalHost() + " use dubbo version " + Version.getVersion() + ", Please check whether the service do exist or version is right firstly, and check the provider has started."); |
| Invoker<T> invoker = select(loadbalance, invocation, invokers, null); |
| try { |
| return invoker.invoke(invocation); |
| } catch (Throwable e) { |
| throw new RpcException("Failfast invoke providers " + invoker.getUrl() + " " + loadbalance.getClass().getAnnotation(Extension.class).value() + " select from all providers " + invokers + " for service " + getInterface().getName() + " method " + invocation.getMethodName() + " on consumer " + NetUtils.getLocalHost() + " use dubbo version " + Version.getVersion() + ", but no luck to perform the invocation. Last error is: " + e.getMessage(), e); |
| } |
| } |
| } |