dubbo TpsLimitFilter 源码
dubbo TpsLimitFilter 代码
文件路径：/dubbo-rpc/dubbo-rpc-api/src/main/java/org/apache/dubbo/rpc/filter/TpsLimitFilter.java
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.dubbo.rpc.filter;
import org.apache.dubbo.common.constants.CommonConstants;
import org.apache.dubbo.common.extension.Activate;
import org.apache.dubbo.rpc.Filter;
import org.apache.dubbo.rpc.Invocation;
import org.apache.dubbo.rpc.Invoker;
import org.apache.dubbo.rpc.Result;
import org.apache.dubbo.rpc.RpcException;
import org.apache.dubbo.rpc.filter.tps.DefaultTPSLimiter;
import org.apache.dubbo.rpc.filter.tps.TPSLimiter;
import static org.apache.dubbo.rpc.Constants.TPS_LIMIT_RATE_KEY;
/**
* TpsLimitFilter limit the TPS (transaction per second) for all method of a service or a particular method.
* Service or method url can define <b>tps</b> or <b>tps.interval</b> to control this control.It use {@link DefaultTPSLimiter}
* as it limit checker. If a provider service method is configured with <b>tps</b>(optionally with <b>tps.interval</b>),then
* if invocation count exceed the configured <b>tps</b> value (default is -1 which means unlimited) then invocation will get
* RpcException.
* */
@Activate(group = CommonConstants.PROVIDER, value = TPS_LIMIT_RATE_KEY)
public class TpsLimitFilter implements Filter {
private final TPSLimiter tpsLimiter = new DefaultTPSLimiter();
@Override
public Result invoke(Invoker<?> invoker, Invocation invocation) throws RpcException {
if (!tpsLimiter.isAllowable(invoker.getUrl(), invocation)) {
throw new RpcException(
"Failed to invoke service " +
invoker.getInterface().getName() +
"." +
invocation.getMethodName() +
" because exceed max service tps.");
}
return invoker.invoke(invocation);
}
}
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