| /* |
| * 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 |
| * |
| * https://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.avro.mapred.tether; |
| |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| import java.nio.ByteBuffer; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.avro.ipc.SaslSocketServer; |
| import org.apache.avro.ipc.specific.SpecificResponder; |
| import org.apache.avro.ipc.Server; |
| import org.apache.avro.ipc.jetty.HttpServer; |
| |
| /** |
| * Java implementation of a tether executable. Useless except for testing, since |
| * it's already possible to write Java MapReduce programs without tethering. |
| * Also serves as an example of how a framework may be implemented. |
| */ |
| public class TetherTaskRunner implements InputProtocol { |
| static final Logger LOG = LoggerFactory.getLogger(TetherTaskRunner.class); |
| |
| private Server inputServer; |
| private TetherTask task; |
| |
| public TetherTaskRunner(TetherTask task) throws IOException { |
| this.task = task; |
| |
| // determine what protocol we are using |
| String protocol = System.getenv("AVRO_TETHER_PROTOCOL"); |
| if (protocol == null) { |
| throw new RuntimeException("AVRO_TETHER_PROTOCOL env var is null"); |
| } |
| |
| protocol = protocol.trim().toLowerCase(); |
| |
| TetheredProcess.Protocol proto; |
| if (protocol.equals("http")) { |
| LOG.info("Use HTTP protocol"); |
| proto = TetheredProcess.Protocol.HTTP; |
| } else if (protocol.equals("sasl")) { |
| LOG.info("Use SASL protocol"); |
| proto = TetheredProcess.Protocol.SASL; |
| } else { |
| throw new RuntimeException("AVRO_TETHER_PROTOCOL=" + protocol + " but this protocol is unsupported"); |
| } |
| |
| InetSocketAddress iaddress = new InetSocketAddress(0); |
| |
| switch (proto) { |
| case SASL: |
| // start input server |
| this.inputServer = new SaslSocketServer(new SpecificResponder(InputProtocol.class, this), iaddress); |
| LOG.info("Started SaslSocketServer on port:" + iaddress.getPort()); |
| break; |
| |
| case HTTP: |
| this.inputServer = new HttpServer(new SpecificResponder(InputProtocol.class, this), iaddress.getPort()); |
| |
| LOG.info("Started HttpServer on port:" + iaddress.getPort()); |
| break; |
| } |
| |
| inputServer.start(); |
| |
| // open output to parent |
| task.open(inputServer.getPort()); |
| } |
| |
| @Override |
| public void configure(TaskType taskType, String inSchema, String outSchema) { |
| LOG.info("got configure"); |
| task.configure(taskType, inSchema, outSchema); |
| } |
| |
| @Override |
| public synchronized void input(ByteBuffer data, long count) { |
| task.input(data, count); |
| } |
| |
| @Override |
| public void partitions(int partitions) { |
| task.partitions(partitions); |
| } |
| |
| @Override |
| public void abort() { |
| LOG.info("got abort"); |
| close(); |
| } |
| |
| @Override |
| public synchronized void complete() { |
| LOG.info("got input complete"); |
| task.complete(); |
| } |
| |
| /** Wait for task to complete. */ |
| public void join() throws InterruptedException { |
| LOG.info("TetherTaskRunner: Start join."); |
| inputServer.join(); |
| LOG.info("TetherTaskRunner: Finish join."); |
| } |
| |
| private void close() { |
| LOG.info("Closing the task"); |
| task.close(); |
| LOG.info("Finished closing the task."); |
| if (inputServer != null) |
| inputServer.close(); |
| } |
| } |