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.io.checkpoint;
020
021import org.apache.reef.tang.annotations.Name;
022import org.apache.reef.tang.annotations.NamedParameter;
023import org.apache.reef.tang.annotations.Parameter;
024
025import javax.inject.Inject;
026
027/**
028 * A naming service that simply returns the name it has been initialized with.
029 * Note that the name is always the same.
030 */
031public class SimpleNamingService implements CheckpointNamingService {
032
033  private final String name;
034
035  @Inject
036  public SimpleNamingService(@Parameter(CheckpointName.class) final String name) {
037    this.name = "checkpoint_" + name;
038  }
039
040  /**
041   * Generate a new checkpoint name.
042   *
043   * @return the checkpoint name
044   */
045  @Override
046  public String getNewName() {
047    return this.name;
048  }
049
050  /**
051   * Prefix for checkpoints.
052   */
053  @NamedParameter(doc = "Checkpoint name.", short_name = "checkpoint_name", default_value = "reef")
054  public static final class CheckpointName implements Name<String> {
055  }
056}