content: /*
   * Copyright (C) 2020 ActiveJ LLC.
   *
   * 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 io.activej.common.time;
  
  import java.time.Instant;
  
  /**
   * Gives access to current time in milliseconds
   */
  public interface CurrentTimeProvider {
  	/**
  	 * Returns current time in milliseconds
  	 */
  	long currentTimeMillis();
  
  	/**
  	 * Returns current time as an {@link Instant}
  	 */
  	default Instant currentInstant() {
  		return Instant.ofEpochMilli(currentTimeMillis());
  	}
  
  	/**
  	 * Returns a provider of current time that uses {@link System#currentTimeMillis()}
  	 */
  	static CurrentTimeProvider ofSystem() {
  		return System::currentTimeMillis;
  	}
  
  }
  