/* * 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.filter.tps.DefaultTPSLimiter; import com.alibaba.dubbo.rpc.filter.tps.TPSLimiter; /** * 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_LIMIT_RATE_KEY) public class TpsLimitFilter implements Filter { private final TPSLimiter tpsLimiter = new DefaultTPSLimiter(); public Result invoke(Invoker<?> invoker, Invocation invocation) throws RpcException { if (!tpsLimiter.isAllowable(invoker.getUrl(), invocation)) { 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.") .toString()); } return invoker.invoke(invocation); } }