| /** |
| * 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.webproxy; |
| |
| import java.net.InetSocketAddress; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.net.NetUtils; |
| import org.apache.hadoop.yarn.api.ClientRMProtocol; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetApplicationReportRequest; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetApplicationReportResponse; |
| import org.apache.hadoop.yarn.api.records.ApplicationId; |
| import org.apache.hadoop.yarn.api.records.ApplicationReport; |
| import org.apache.hadoop.yarn.conf.YarnConfiguration; |
| import org.apache.hadoop.yarn.exceptions.YarnRemoteException; |
| import org.apache.hadoop.yarn.factories.RecordFactory; |
| import org.apache.hadoop.yarn.factory.providers.RecordFactoryProvider; |
| import org.apache.hadoop.yarn.ipc.YarnRPC; |
| |
| /** |
| * This class abstracts away how ApplicationReports are fetched. |
| */ |
| public class AppReportFetcher { |
| private static final Log LOG = LogFactory.getLog(AppReportFetcher.class); |
| private final Configuration conf; |
| private final ClientRMProtocol applicationsManager; |
| private final RecordFactory recordFactory = RecordFactoryProvider.getRecordFactory(null); |
| |
| /** |
| * Create a new Connection to the RM to fetch Application reports. |
| * @param conf the conf to use to know where the RM is. |
| */ |
| public AppReportFetcher(Configuration conf) { |
| this.conf = conf; |
| YarnRPC rpc = YarnRPC.create(this.conf); |
| InetSocketAddress rmAddress = |
| NetUtils.createSocketAddr(this.conf.get( |
| YarnConfiguration.RM_ADDRESS, |
| YarnConfiguration.DEFAULT_RM_ADDRESS)); |
| LOG.info("Connecting to ResourceManager at " + rmAddress); |
| applicationsManager = |
| (ClientRMProtocol) rpc.getProxy(ClientRMProtocol.class, |
| rmAddress, this.conf); |
| LOG.info("Connected to ResourceManager at " + rmAddress); |
| } |
| |
| /** |
| * Just call directly into the applicationsManager given instead of creating |
| * a remote connection to it. This is mostly for when the Proxy is running |
| * as part of the RM already. |
| * @param conf the configuration to use |
| * @param applicationsManager what to use to get the RM reports. |
| */ |
| public AppReportFetcher(Configuration conf, ClientRMProtocol applicationsManager) { |
| this.conf = conf; |
| this.applicationsManager = applicationsManager; |
| } |
| |
| /** |
| * Get a report for the specified app. |
| * @param appId the id of the application to get. |
| * @return the ApplicationReport for that app. |
| * @throws YarnRemoteException on any error. |
| */ |
| public ApplicationReport getApplicationReport(ApplicationId appId) |
| throws YarnRemoteException { |
| GetApplicationReportRequest request = recordFactory |
| .newRecordInstance(GetApplicationReportRequest.class); |
| request.setApplicationId(appId); |
| |
| GetApplicationReportResponse response = applicationsManager |
| .getApplicationReport(request); |
| return response.getApplicationReport(); |
| } |
| } |