Source code

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.restart.DriverRestarted;
022import org.apache.reef.tang.annotations.Unit;
023import org.apache.reef.wake.EventHandler;
024
025import javax.inject.Inject;
026import java.util.logging.Level;
027import java.util.logging.Logger;
028
029/**
030 * The Restart code for the Hello REEF Application.
031 */
032@Unit
033public final class HelloDriverRestart {
034
035  private static final Logger LOG = Logger.getLogger(HelloDriverRestart.class.getName());
036
037  @Inject
038  private HelloDriverRestart() {
039  }
040
041  /**
042   * Handles Restarts. Prints a message.
043   */
044  public final class DriverRestartHandler implements EventHandler<DriverRestarted> {
045    @Override
046    public void onNext(final DriverRestarted value) {
047      LOG.log(Level.INFO, "Hello, driver restarted at " + value.getStartTime());
048    }
049  }
050}