| /*
|
| * 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.logger.Logger;
|
| import com.alibaba.dubbo.common.logger.LoggerFactory;
|
| 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.RpcResult;
|
| import com.alibaba.dubbo.rpc.cluster.Directory;
|
| import com.alibaba.dubbo.rpc.cluster.LoadBalance;
|
| |
| /** |
| * 失败安全,出现异常时,直接忽略,通常用于写入审计日志等操作。 |
| * |
| * <a href="http://en.wikipedia.org/wiki/Fail-safe">Fail-safe</a> |
| * |
| * @author william.liangf |
| */ |
| public class FailsafeClusterInvoker<T> extends AbstractClusterInvoker<T>{ |
| private static final Logger logger = LoggerFactory.getLogger(FailsafeClusterInvoker.class); |
| |
| public FailsafeClusterInvoker(Directory<T> directory) { |
| super(directory); |
| } |
| |
| public Result doInvoke(Invocation invocation, List<Invoker<T>> invokers, LoadBalance loadbalance) throws RpcException { |
| try {
|
| checkInvokers(invokers, invocation);
|
| Invoker<T> invoker = select(loadbalance, invocation, invokers, null); |
| return invoker.invoke(invocation); |
| } catch (Throwable e) { |
| logger.error("Failsafe ignore exception: " + e.getMessage(), e); |
| return new RpcResult(); // ignore |
| } |
| } |
| } |