| /** |
| * 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.io.IOException; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.ipc.RPC; |
| import org.apache.hadoop.yarn.api.ApplicationClientProtocol; |
| import org.apache.hadoop.yarn.api.ApplicationHistoryProtocol; |
| import org.apache.hadoop.yarn.api.protocolrecords.GetApplicationReportRequest; |
| import org.apache.hadoop.yarn.api.records.ApplicationId; |
| import org.apache.hadoop.yarn.api.records.ApplicationReport; |
| import org.apache.hadoop.yarn.client.AHSProxy; |
| import org.apache.hadoop.yarn.client.ClientRMProxy; |
| import org.apache.hadoop.yarn.conf.YarnConfiguration; |
| import org.apache.hadoop.yarn.exceptions.ApplicationNotFoundException; |
| import org.apache.hadoop.yarn.exceptions.YarnException; |
| import org.apache.hadoop.yarn.exceptions.YarnRuntimeException; |
| import org.apache.hadoop.yarn.factories.RecordFactory; |
| import org.apache.hadoop.yarn.factory.providers.RecordFactoryProvider; |
| |
| /** |
| * This class abstracts away how ApplicationReports are fetched. |
| */ |
| public class AppReportFetcher { |
| enum AppReportSource { RM, AHS } |
| private static final Log LOG = LogFactory.getLog(AppReportFetcher.class); |
| private final Configuration conf; |
| private final ApplicationClientProtocol applicationsManager; |
| private final ApplicationHistoryProtocol historyManager; |
| private final RecordFactory recordFactory = RecordFactoryProvider.getRecordFactory(null); |
| private boolean isAHSEnabled; |
| |
| /** |
| * Create a new Connection to the RM/Application History Server |
| * to fetch Application reports. |
| * @param conf the conf to use to know where the RM is. |
| */ |
| public AppReportFetcher(Configuration conf) { |
| if (conf.getBoolean(YarnConfiguration.APPLICATION_HISTORY_ENABLED, |
| YarnConfiguration.DEFAULT_APPLICATION_HISTORY_ENABLED)) { |
| isAHSEnabled = true; |
| } |
| this.conf = conf; |
| try { |
| applicationsManager = ClientRMProxy.createRMProxy(conf, |
| ApplicationClientProtocol.class); |
| if (isAHSEnabled) { |
| historyManager = getAHSProxy(conf); |
| } else { |
| this.historyManager = null; |
| } |
| } catch (IOException e) { |
| throw new YarnRuntimeException(e); |
| } |
| } |
| |
| /** |
| * Create a direct connection to RM instead of a remote connection when |
| * the proxy is running as part of the RM. Also create a remote connection to |
| * Application History Server if it is enabled. |
| * @param conf the configuration to use |
| * @param applicationsManager what to use to get the RM reports. |
| */ |
| public AppReportFetcher(Configuration conf, ApplicationClientProtocol applicationsManager) { |
| if (conf.getBoolean(YarnConfiguration.APPLICATION_HISTORY_ENABLED, |
| YarnConfiguration.DEFAULT_APPLICATION_HISTORY_ENABLED)) { |
| isAHSEnabled = true; |
| } |
| this.conf = conf; |
| this.applicationsManager = applicationsManager; |
| if (isAHSEnabled) { |
| try { |
| historyManager = getAHSProxy(conf); |
| } catch (IOException e) { |
| throw new YarnRuntimeException(e); |
| } |
| } else { |
| this.historyManager = null; |
| } |
| } |
| |
| protected ApplicationHistoryProtocol getAHSProxy(Configuration configuration) |
| throws IOException { |
| return AHSProxy.createAHSProxy(configuration, |
| ApplicationHistoryProtocol.class, |
| configuration.getSocketAddr(YarnConfiguration.TIMELINE_SERVICE_ADDRESS, |
| YarnConfiguration.DEFAULT_TIMELINE_SERVICE_ADDRESS, |
| YarnConfiguration.DEFAULT_TIMELINE_SERVICE_PORT)); |
| } |
| |
| /** |
| * Get an application report for the specified application id from the RM and |
| * fall back to the Application History Server if not found in RM. |
| * @param appId id of the application to get. |
| * @return the ApplicationReport for the appId. |
| * @throws YarnException on any error. |
| * @throws IOException |
| */ |
| public FetchedAppReport getApplicationReport(ApplicationId appId) |
| throws YarnException, IOException { |
| GetApplicationReportRequest request = recordFactory |
| .newRecordInstance(GetApplicationReportRequest.class); |
| request.setApplicationId(appId); |
| |
| ApplicationReport appReport; |
| FetchedAppReport fetchedAppReport; |
| try { |
| appReport = applicationsManager. |
| getApplicationReport(request).getApplicationReport(); |
| fetchedAppReport = new FetchedAppReport(appReport, AppReportSource.RM); |
| } catch (ApplicationNotFoundException e) { |
| if (!isAHSEnabled) { |
| // Just throw it as usual if historyService is not enabled. |
| throw e; |
| } |
| //Fetch the application report from AHS |
| appReport = historyManager. |
| getApplicationReport(request).getApplicationReport(); |
| fetchedAppReport = new FetchedAppReport(appReport, AppReportSource.AHS); |
| } |
| return fetchedAppReport; |
| } |
| |
| public void stop() { |
| if (this.applicationsManager != null) { |
| RPC.stopProxy(this.applicationsManager); |
| } |
| if (this.historyManager != null) { |
| RPC.stopProxy(this.historyManager); |
| } |
| } |
| |
| /* |
| * This class creates a bundle of the application report and the source from |
| * where the the report was fetched. This allows the WebAppProxyServlet |
| * to make decisions for the application report based on the source. |
| */ |
| static class FetchedAppReport { |
| private ApplicationReport appReport; |
| private AppReportSource appReportSource; |
| |
| public FetchedAppReport(ApplicationReport appReport, |
| AppReportSource appReportSource) { |
| this.appReport = appReport; |
| this.appReportSource = appReportSource; |
| } |
| |
| public AppReportSource getAppReportSource() { |
| return this.appReportSource; |
| } |
| |
| public ApplicationReport getApplicationReport() { |
| return this.appReport; |
| } |
| } |
| } |