content: /**
   * 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 org.apache.aurora.common.stats;
  
  import java.util.Set;
  
  /**
   * A repository for time series data.
   *
   * @author William Farner
   */
  public interface TimeSeriesRepository {
  
    /**
     * Fetches the names of all available time series.
     *
     * @return Available time series, which can then be obtained by calling {@link #get(String)}.
     */
    Set<String> getAvailableSeries();
  
    /**
     * Fetches a time series by name.
     *
     * @param name The name of the time series to fetch.
     * @return The time series registered with the given name, or {@code null} if no such time series
     *     has been registered.
     */
    TimeSeries get(String name);
  
    /**
     * Gets an ordered iterable of the timestamps that all timeseries were sampled at.
     *
     * @return All current timestamps.
     */
    Iterable<Number> getTimestamps();
  }
  