| /* |
| * Copyright 1999-2012 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.filter; |
| |
| import com.alibaba.dubbo.common.Constants; |
| import com.alibaba.dubbo.common.extension.Activate; |
| import com.alibaba.dubbo.rpc.Filter; |
| 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.RpcStatus; |
| |
| /** |
| * 限制 service 或方法的 tps. |
| * |
| * @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a> |
| */ |
| @Activate(group = Constants.PROVIDER, value = Constants.TPS_MAX_KEY) |
| public class TpsLimitFilter implements Filter { |
| |
| // TODO 现在依赖 ActiveLimitFilter 或 ExecuteLimitFilter 的计数,需要放到这两个 filter 后执行 |
| |
| public Result invoke(Invoker<?> invoker, Invocation invocation) throws RpcException { |
| |
| long max = invoker.getUrl().getMethodParameter( |
| invocation.getMethodName(), Constants.TPS_MAX_KEY, 0L); |
| // verify method tps |
| if (max > 0L |
| && max <= RpcStatus.getStatus(invoker.getUrl(), invocation.getMethodName()).getAverageTps()) { |
| throw new RpcException( |
| new StringBuilder(64) |
| .append("Failed to invoke service ") |
| .append(invoker.getInterface().getName()) |
| .append(".") |
| .append(invocation.getMethodName()) |
| .append(" because exceed max service tps ") |
| .append(max).toString()); |
| } |
| |
| return invoker.invoke(invocation); |
| } |
| |
| } |