/* | |
* 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.filter; | |
import com.alibaba.dubbo.common.Constants; | |
import com.alibaba.dubbo.common.URL; | |
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; | |
/** | |
* LimitInvokerFilter | |
* | |
* @author william.liangf | |
*/ | |
@Activate(group = Constants.CONSUMER, value = Constants.ACTIVES_KEY) | |
public class ActiveLimitFilter implements Filter { | |
public Result invoke(Invoker<?> invoker, Invocation invocation) throws RpcException { | |
URL url = invoker.getUrl(); | |
String methodName = invocation.getMethodName(); | |
int max = invoker.getUrl().getMethodParameter(methodName, Constants.ACTIVES_KEY, 0); | |
RpcStatus count = RpcStatus.getStatus(invoker.getUrl(), invocation.getMethodName()); | |
if (max > 0) { | |
long timeout = invoker.getUrl().getMethodParameter(invocation.getMethodName(), Constants.TIMEOUT_KEY, 0); | |
long start = System.currentTimeMillis(); | |
long remain = timeout; | |
int active = count.getActive(); | |
if (active >= max) { | |
synchronized (count) { | |
while ((active = count.getActive()) >= max) { | |
try { | |
count.wait(remain); | |
} catch (InterruptedException e) { | |
} | |
long elapsed = System.currentTimeMillis() - start; | |
remain = timeout - elapsed; | |
if (remain <= 0) { | |
throw new RpcException("Waiting concurrent invoke timeout in client-side for service: " | |
+ invoker.getInterface().getName() + ", method: " | |
+ invocation.getMethodName() + ", elapsed: " + elapsed | |
+ ", timeout: " + timeout + ". concurrent invokes: " + active | |
+ ". max concurrent invoke limit: " + max); | |
} | |
} | |
} | |
} | |
} | |
try { | |
long begin = System.currentTimeMillis(); | |
RpcStatus.beginCount(url, methodName); | |
try { | |
Result result = invoker.invoke(invocation); | |
RpcStatus.endCount(url, methodName, System.currentTimeMillis() - begin, true); | |
return result; | |
} catch (RuntimeException t) { | |
RpcStatus.endCount(url, methodName, System.currentTimeMillis() - begin, false); | |
throw t; | |
} | |
} finally { | |
if(max>0){ | |
synchronized (count) { | |
count.notify(); | |
} | |
} | |
} | |
} | |
} |