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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.tang.examples.timer;
020
021import org.apache.reef.tang.Configuration;
022import org.apache.reef.tang.Tang;
023import org.apache.reef.tang.annotations.Parameter;
024import org.apache.reef.tang.exceptions.BindException;
025import org.apache.reef.tang.exceptions.InjectionException;
026import org.apache.reef.tang.formats.ConfigurationModule;
027import org.apache.reef.tang.formats.ConfigurationModuleBuilder;
028import org.apache.reef.tang.formats.OptionalParameter;
029
030import javax.inject.Inject;
031
032public class TimerMock implements Timer {
033
034  public static final ConfigurationModule CONF = new TimerMockConf()
035      .bindImplementation(Timer.class, TimerMock.class)
036      .bindNamedParameter(Timer.Seconds.class, TimerMockConf.MOCK_SLEEP_TIME)
037      .build();
038  private final int seconds;
039
040  @Inject
041  TimerMock(@Parameter(Timer.Seconds.class) final int seconds) {
042    if (seconds < 0) {
043      throw new IllegalArgumentException("Cannot sleep for negative time!");
044    }
045    this.seconds = seconds;
046  }
047
048  public static void main(final String[] args) throws BindException, InjectionException, InterruptedException {
049    final Configuration c = TimerMock.CONF
050        .set(TimerMockConf.MOCK_SLEEP_TIME, 1)
051        .build();
052    final Timer t = Tang.Factory.getTang().newInjector(c).getInstance(Timer.class);
053    System.out.println("Tick...");
054    t.sleep();
055    System.out.println("...tock.");
056  }
057
058  @Override
059  public void sleep() {
060    System.out.println("Would have slept for " + seconds + " sec.");
061  }
062
063  public static class TimerMockConf extends ConfigurationModuleBuilder {
064    public static final OptionalParameter<Integer> MOCK_SLEEP_TIME = new OptionalParameter<>();
065  }
066}