hadoop RMAdminRequestInterceptor 源码
haddop RMAdminRequestInterceptor 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/main/java/org/apache/hadoop/yarn/server/router/rmadmin/RMAdminRequestInterceptor.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.hadoop.yarn.server.router.rmadmin;
import org.apache.hadoop.conf.Configurable;
import org.apache.hadoop.yarn.server.api.ResourceManagerAdministrationProtocol;
/**
* Defines the contract to be implemented by the request interceptor classes,
* that can be used to intercept and inspect messages sent from the client to
* the resource manager.
*/
public interface RMAdminRequestInterceptor
extends ResourceManagerAdministrationProtocol, Configurable {
/**
* This method is called for initializing the interceptor. This is guaranteed
* to be called only once in the lifetime of this instance.
*
* @param user the name of the client
*/
void init(String user);
/**
* This method is called to release the resources held by the interceptor.
* This will be called when the application pipeline is being destroyed. The
* concrete implementations should dispose the resources and forward the
* request to the next interceptor, if any.
*/
void shutdown();
/**
* Sets the next interceptor in the pipeline. The concrete implementation of
* this interface should always pass the request to the nextInterceptor after
* inspecting the message. The last interceptor in the chain is responsible to
* send the messages to the resource manager service and so the last
* interceptor will not receive this method call.
*
* @param nextInterceptor the RMAdminRequestInterceptor to set in the pipeline
*/
void setNextInterceptor(RMAdminRequestInterceptor nextInterceptor);
/**
* Returns the next interceptor in the chain.
*
* @return the next interceptor in the chain
*/
RMAdminRequestInterceptor getNextInterceptor();
}
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hadoop AbstractRMAdminRequestInterceptor 源码
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