content: /*
   * 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 network.aika.queue.keys;
  
  
  import network.aika.queue.ProcessingPhase;
  import network.aika.queue.Timestamp;
  import network.aika.utils.StringUtils;
  
  import java.util.Comparator;
  import java.util.function.Function;
  
  /**
   * @author Lukas Molzberger
   */
  public abstract class QueueKey implements Comparable<QueueKey> {
  
      public static final int MAX_ROUND = Integer.MAX_VALUE;
  
      public static final Comparator<QueueKey> COMPARATOR = Comparator
              .<QueueKey>comparingInt(k -> k.round)
              .thenComparingInt(k -> k.getPhase().rank())
              .thenComparing(Function.identity())
              .thenComparing(QueueKey::getCurrentTimestamp);
  
      private final int round;
  
      private final ProcessingPhase phase;
  
      private final Timestamp currentTimestamp;
  
      public QueueKey(int round, ProcessingPhase phase, Timestamp currentTimestamp) {
          this.round = round;
          this.phase = phase;
          this.currentTimestamp = currentTimestamp;
      }
  
      public int getRound() {
          return round;
      }
  
      protected String getRoundStr() {
          return StringUtils.roundToString(getRound());
      }
  
      public ProcessingPhase getPhase() {
          return phase;
      }
  
      protected String getPhaseStr() {
          return getPhase() + "-" + getPhase();
      }
  
      public Timestamp getCurrentTimestamp() {
          return currentTimestamp;
      }
  }
  