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}