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.evaluator.JVMProcess; 024import org.apache.reef.driver.evaluator.JVMProcessFactory; 025import org.apache.reef.driver.task.TaskConfiguration; 026import org.apache.reef.tang.Configuration; 027import org.apache.reef.tang.annotations.Unit; 028import org.apache.reef.wake.EventHandler; 029import org.apache.reef.wake.time.event.StartTime; 030 031import javax.inject.Inject; 032import java.util.logging.Level; 033import java.util.logging.Logger; 034 035/** 036 * The Driver code for the Hello JVM Options Application. 037 * The additional JVM Options print out diagnostics at the Evaluator. 038 */ 039@Unit 040public final class HelloJVMOptionsDriver { 041 042 private static final Logger LOG = Logger.getLogger(HelloJVMOptionsDriver.class.getName()); 043 044 private final EvaluatorRequestor requestor; 045 private final JVMProcessFactory jvmProcessFactory; 046 047 /** 048 * Job driver constructor - instantiated via TANG. 049 * 050 * @param requestor evaluator requestor object used to create new evaluator containers. 051 */ 052 @Inject 053 private HelloJVMOptionsDriver(final EvaluatorRequestor requestor, 054 final JVMProcessFactory jvmProcessFactory) { 055 this.requestor = requestor; 056 this.jvmProcessFactory = jvmProcessFactory; 057 LOG.log(Level.FINE, "Instantiated 'HelloDriver'"); 058 } 059 060 /** 061 * Handles the StartTime event: Request as single Evaluator. 062 */ 063 public final class StartHandler implements EventHandler<StartTime> { 064 @Override 065 public void onNext(final StartTime startTime) { 066 HelloJVMOptionsDriver.this.requestor.newRequest() 067 .setNumber(1) 068 .setMemory(64) 069 .setNumberOfCores(1) 070 .submit(); 071 LOG.log(Level.INFO, "Requested Evaluator."); 072 } 073 } 074 075 /** 076 * Handles AllocatedEvaluator: Submit the HelloTask with additional JVM Options. 077 * The additional JVM Options print out diagnostics at the Evaluator. 078 */ 079 public final class EvaluatorAllocatedHandler implements EventHandler<AllocatedEvaluator> { 080 @Override 081 public void onNext(final AllocatedEvaluator allocatedEvaluator) { 082 LOG.log(Level.INFO, "Submitting HelloREEF task to AllocatedEvaluator: {0}", allocatedEvaluator); 083 final Configuration taskConfiguration = TaskConfiguration.CONF 084 .set(TaskConfiguration.IDENTIFIER, "HelloREEFTask") 085 .set(TaskConfiguration.TASK, HelloTask.class) 086 .build(); 087 final JVMProcess jvmProcess = jvmProcessFactory.newEvaluatorProcess() 088 .setMemory(56) 089 .addOption("-Xdiag") 090 .addOption("-XX:+PrintCommandLineFlags") 091 .addOption("-XX:+PrintGCDetails"); 092 allocatedEvaluator.setProcess(jvmProcess); 093 allocatedEvaluator.submitTask(taskConfiguration); 094 } 095 } 096}