LocalFileSystemKey.java

//  Copyright 2017 Twitter. All rights reserved.
//
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.
package com.twitter.heron.uploader.localfs;

/**
 * Keys specific to the local FS uploader
 */
public enum LocalFileSystemKey {
  //key to specify the local file system directory for the uploader
  FILE_SYSTEM_DIRECTORY("heron.uploader.localfs.file.system.directory",
      "${HOME}/.herondata/repository/${CLUSTER}/${ROLE}/${TOPOLOGY}");

  private final String value;
  private final Object defaultValue;

  LocalFileSystemKey(String value) {
    this.value = value;
    this.defaultValue = null;
  }

  LocalFileSystemKey(String value, String defaultValue) {
    this.value = value;
    this.defaultValue = defaultValue;
  }

  public String value() {
    return value;
  }

  public String getDefaultString() {
    return (String) defaultValue;
  }
}