content: /*
   * Copyright 2022 The FeatHub Authors
   *
   * 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
   *
   *     https://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 com.alibaba.feathub.flink.udf.processfunction;
  
  import org.apache.flink.types.Row;
  import org.apache.flink.util.Collector;
  
  import java.io.Serializable;
  
  /** Interface for handling post sliding window expired row. */
  // TODO: Implement a SlidingWindowExpiredRowHandler that retract the expired row.
  public interface SlidingWindowExpiredRowHandler extends Serializable {
      void handleExpiredRow(Collector<Row> out, Row expiredRow, long currentTimestamp);
  }
  