| /** |
| * 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.mapred; |
| |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.ipc.RPC; |
| import org.apache.hadoop.mapreduce.MRConfig; |
| import org.apache.hadoop.mapreduce.protocol.ClientProtocol; |
| import org.apache.hadoop.mapreduce.protocol.ClientProtocolProvider; |
| import org.apache.hadoop.mapreduce.server.jobtracker.JTConfig; |
| import org.apache.hadoop.net.NetUtils; |
| import org.apache.hadoop.security.UserGroupInformation; |
| |
| @InterfaceAudience.Private |
| public class JobTrackerClientProtocolProvider extends ClientProtocolProvider { |
| |
| @Override |
| public ClientProtocol create(Configuration conf) throws IOException { |
| String framework = conf.get(MRConfig.FRAMEWORK_NAME); |
| if (!MRConfig.CLASSIC_FRAMEWORK_NAME.equals(framework)) { |
| return null; |
| } |
| String tracker = conf.get(JTConfig.JT_IPC_ADDRESS, "local"); |
| if (!"local".equals(tracker)) { |
| return createRPCProxy(JobTracker.getAddress(conf), conf); |
| } else { |
| throw new IOException("Invalid \"" + JTConfig.JT_IPC_ADDRESS |
| + "\" configuration value for JobTracker: \"" |
| + tracker + "\""); |
| } |
| } |
| |
| @Override |
| public ClientProtocol create(InetSocketAddress addr, Configuration conf) |
| throws IOException { |
| return createRPCProxy(addr, conf); |
| } |
| |
| private ClientProtocol createRPCProxy(InetSocketAddress addr, |
| Configuration conf) throws IOException { |
| return (ClientProtocol) RPC.getProxy(ClientProtocol.class, |
| ClientProtocol.versionID, addr, UserGroupInformation.getCurrentUser(), |
| conf, NetUtils.getSocketFactory(conf, ClientProtocol.class)); |
| } |
| |
| @Override |
| public void close(ClientProtocol clientProtocol) throws IOException { |
| RPC.stopProxy(clientProtocol); |
| } |
| |
| } |