| /* |
| * Copyright 1999-2018 Alibaba Group Holding Ltd. |
| * |
| * 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.csp.sentinel.adapter.dubbo.fallback; |
| |
| import com.alibaba.csp.sentinel.slots.block.BlockException; |
| |
| import org.apache.dubbo.rpc.Invocation; |
| import org.apache.dubbo.rpc.Invoker; |
| import org.apache.dubbo.rpc.Result; |
| |
| /** |
| * Fallback handler for Dubbo services. |
| * |
| * @author Eric Zhao |
| */ |
| @FunctionalInterface |
| public interface DubboFallback { |
| |
| /** |
| * Handle the block exception and provide fallback result. |
| * |
| * @param invoker Dubbo invoker |
| * @param invocation Dubbo invocation |
| * @param ex block exception |
| * @return fallback result |
| */ |
| Result handle(Invoker<?> invoker, Invocation invocation, BlockException ex); |
| } |