hadoop AppInfoProvider 源码
haddop AppInfoProvider 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/webapp/AppInfoProvider.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
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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.webapp;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import javax.servlet.http.HttpServletRequest;
/**
* Classes implementing this interface are used in the {@link LogServlet}
* for providing various application related information.
*/
@InterfaceAudience.LimitedPrivate({"YARN"})
@InterfaceStability.Unstable
public interface AppInfoProvider {
/**
* Returns the node HTTP address.
*
* @param req {@link HttpServletRequest} associated with the request
* @param appId the id of the application
* @param appAttemptId the id of the application attempt
* @param containerId the container id
* @param clusterId the id of the cluster
* @return the node HTTP address
*/
String getNodeHttpAddress(HttpServletRequest req,
String appId, String appAttemptId, String containerId, String clusterId);
/**
* Returns {@link BasicAppInfo} object that wraps the collected information
* about the application.
*
* @param req {@link HttpServletRequest} associated with the request
* @param appId the id of the application
* @param clusterId the id of the cluster
* @return {@link BasicAppInfo} object
*/
BasicAppInfo getApp(HttpServletRequest req, String appId, String clusterId);
}
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