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;
  
  import network.aika.queue.keys.QueueKey;
  
  
  /**
   * @author Lukas Molzberger
   */
  public abstract class Step<E extends QueueProvider> {
  
      protected boolean isQueued;
      protected QueueKey queueKey;
  
      public void setQueued(boolean queued) {
          isQueued = queued;
      }
  
      public boolean isQueued() {
          return isQueued;
      }
  
      public QueueKey getQueueKey() {
          return queueKey;
      }
  
      public abstract Queue getQueue();
  
      public boolean incrementRound() {
          return false;
      }
  
      public abstract void createQueueKey(Timestamp timestamp, int round);
  
      public abstract void process();
  
      public abstract ProcessingPhase getPhase();
  
      public static boolean add(Step s) {
          Queue q = s.getQueue();
          if(q == null)
              return false;
  
          q.addStep(s);
          return true;
      }
  
      public abstract E getElement();
  }
  