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
   * <p/>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p/>
   * 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 storm.trident.windowing.config;
  
  import java.io.Serializable;
  
  import storm.trident.windowing.strategy.WindowStrategy;
  
  /**
   * Windowing configuration with window and sliding length.
   */
  public interface WindowConfig extends Serializable {
  
      /**
       * Returns the length of the window.
       */
      int getWindowLength();
  
      /**
       * Returns the sliding length of the moving window.
       */
      int getSlidingLength();
  
      /**
       * Gives the type of windowing. It can be any of {@code Type} values.
       */
      <T> WindowStrategy<T> getWindowStrategy();
  
      void validate();
  
      enum Type {
          SLIDING_COUNT,
          TUMBLING_COUNT,
          SLIDING_DURATION,
          TUMBLING_DURATION
      }
  }
  