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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.accumulo.server.util.time;

/**
 * Provide time from System time and hints from another time source.
 *
 * Provides a convenient static replacement for System.currentTimeMillis()
 */
public class RelativeTime extends BaseRelativeTime {

  private RelativeTime() {
    super(new SystemTime());
  }

  private static BaseRelativeTime instance = new RelativeTime();

  public static BaseRelativeTime getInstance() {
    return instance;
  }

  public static void setInstance(BaseRelativeTime newInstance) {
    instance = newInstance;
  }

  public static long currentTimeMillis() {
    return getInstance().currentTime();
  }

}