/* | |
* 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 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.RpcContext; | |
import com.alibaba.dubbo.rpc.RpcException; | |
import com.alibaba.dubbo.rpc.RpcInvocation; | |
import com.alibaba.dubbo.rpc.RpcResult; | |
import java.util.HashMap; | |
import java.util.Map; | |
/** | |
* ContextInvokerFilter | |
*/ | |
@Activate(group = Constants.PROVIDER, order = -10000) | |
public class ContextFilter implements Filter { | |
@Override | |
public Result invoke(Invoker<?> invoker, Invocation invocation) throws RpcException { | |
Map<String, String> attachments = invocation.getAttachments(); | |
if (attachments != null) { | |
attachments = new HashMap<String, String>(attachments); | |
attachments.remove(Constants.PATH_KEY); | |
attachments.remove(Constants.GROUP_KEY); | |
attachments.remove(Constants.VERSION_KEY); | |
attachments.remove(Constants.DUBBO_VERSION_KEY); | |
attachments.remove(Constants.TOKEN_KEY); | |
attachments.remove(Constants.TIMEOUT_KEY); | |
attachments.remove(Constants.ASYNC_KEY);// Remove async property to avoid being passed to the following invoke chain. | |
} | |
RpcContext.getContext() | |
.setInvoker(invoker) | |
.setInvocation(invocation) | |
// .setAttachments(attachments) // merged from dubbox | |
.setLocalAddress(invoker.getUrl().getHost(), | |
invoker.getUrl().getPort()); | |
// mreged from dubbox | |
// we may already added some attachments into RpcContext before this filter (e.g. in rest protocol) | |
if (attachments != null) { | |
if (RpcContext.getContext().getAttachments() != null) { | |
RpcContext.getContext().getAttachments().putAll(attachments); | |
} else { | |
RpcContext.getContext().setAttachments(attachments); | |
} | |
} | |
if (invocation instanceof RpcInvocation) { | |
((RpcInvocation) invocation).setInvoker(invoker); | |
} | |
try { | |
RpcResult result = (RpcResult) invoker.invoke(invocation); | |
// pass attachments to result | |
result.addAttachments(RpcContext.getServerContext().getAttachments()); | |
return result; | |
} finally { | |
RpcContext.removeContext(); | |
RpcContext.getServerContext().clearAttachments(); | |
} | |
} | |
} |