001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 */ 019package org.apache.reef.examples.hello; 020 021import org.apache.reef.driver.evaluator.AllocatedEvaluator; 022import org.apache.reef.driver.evaluator.EvaluatorRequestor; 023import org.apache.reef.driver.task.TaskConfiguration; 024import org.apache.reef.tang.Configuration; 025import org.apache.reef.tang.annotations.Unit; 026import org.apache.reef.wake.EventHandler; 027import org.apache.reef.wake.time.event.StartTime; 028 029import javax.inject.Inject; 030import java.util.logging.Level; 031import java.util.logging.Logger; 032 033/** 034 * The Driver code for the Hello REEF Application. 035 */ 036@Unit 037public final class HelloDriver { 038 039 private static final Logger LOG = Logger.getLogger(HelloDriver.class.getName()); 040 041 private final EvaluatorRequestor requestor; 042 043 /** 044 * Job driver constructor - instantiated via TANG. 045 * 046 * @param requestor evaluator requestor object used to create new evaluator containers. 047 */ 048 @Inject 049 private HelloDriver(final EvaluatorRequestor requestor) { 050 this.requestor = requestor; 051 LOG.log(Level.FINE, "Instantiated 'HelloDriver'"); 052 } 053 054 /** 055 * Handles the StartTime event: Request as single Evaluator. 056 */ 057 public final class StartHandler implements EventHandler<StartTime> { 058 @Override 059 public void onNext(final StartTime startTime) { 060 HelloDriver.this.requestor.newRequest() 061 .setNumber(1) 062 .setMemory(64) 063 .setNumberOfCores(1) 064 .submit(); 065 LOG.log(Level.INFO, "Requested Evaluator."); 066 } 067 } 068 069 /** 070 * Handles AllocatedEvaluator: Submit the HelloTask. 071 */ 072 public final class EvaluatorAllocatedHandler implements EventHandler<AllocatedEvaluator> { 073 @Override 074 public void onNext(final AllocatedEvaluator allocatedEvaluator) { 075 LOG.log(Level.INFO, "Submitting HelloREEF task to AllocatedEvaluator: {0}", allocatedEvaluator); 076 final Configuration taskConfiguration = TaskConfiguration.CONF 077 .set(TaskConfiguration.IDENTIFIER, "HelloREEFTask") 078 .set(TaskConfiguration.TASK, HelloTask.class) 079 .build(); 080 allocatedEvaluator.submitTask(taskConfiguration); 081 } 082 } 083}