/* | |
* 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.cache.filter; | |
import com.alibaba.dubbo.cache.Cache; | |
import com.alibaba.dubbo.cache.CacheFactory; | |
import com.alibaba.dubbo.common.Constants; | |
import com.alibaba.dubbo.common.extension.Activate; | |
import com.alibaba.dubbo.common.utils.ConfigUtils; | |
import com.alibaba.dubbo.common.utils.StringUtils; | |
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.RpcResult; | |
/** | |
* CacheFilter | |
* | |
* @author william.liangf | |
*/ | |
@Activate(group = {Constants.CONSUMER, Constants.PROVIDER}, value = Constants.CACHE_KEY) | |
public class CacheFilter implements Filter { | |
private CacheFactory cacheFactory; | |
public void setCacheFactory(CacheFactory cacheFactory) { | |
this.cacheFactory = cacheFactory; | |
} | |
public Result invoke(Invoker<?> invoker, Invocation invocation) throws RpcException { | |
if (cacheFactory != null && ConfigUtils.isNotEmpty(invoker.getUrl().getMethodParameter(invocation.getMethodName(), Constants.CACHE_KEY))) { | |
Cache cache = cacheFactory.getCache(invoker.getUrl().addParameter(Constants.METHOD_KEY, invocation.getMethodName())); | |
if (cache != null) { | |
String key = StringUtils.toArgumentString(invocation.getArguments()); | |
if (cache != null && key != null) { | |
Object value = cache.get(key); | |
if (value != null) { | |
return new RpcResult(value); | |
} | |
Result result = invoker.invoke(invocation); | |
if (! result.hasException()) { | |
cache.put(key, result.getValue()); | |
} | |
return result; | |
} | |
} | |
} | |
return invoker.invoke(invocation); | |
} | |
} |