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 org.apache.apex.malhar.contrib.hbase;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import org.apache.apex.malhar.lib.db.AbstractPassThruTransactionableStoreOutputOperator;
  import org.apache.hadoop.hbase.client.HTable;
  
  import com.datatorrent.api.Operator;
  
  /**
   * A base implementation of an AggregateTransactionableStoreOutputOperator that stores tuples in HBase
   * and provides batch insert.&nbsp; Subclasses should provide implementation for specific Hbase operations. <br>
   *
   * @since 3.8.0
   */
  public abstract class AbstractHBaseWindowOutputOperator<T> extends AbstractPassThruTransactionableStoreOutputOperator<T, HBaseWindowStore> implements OutputAdapter.Driver<T>,  Operator.CheckpointNotificationListener
  {
    /**
     * Both at checkpoint window and end window, flush the tuples as application window may not align with
     * end window especially when it is more than one streaming window
     */
  
    private static final Logger logger = LoggerFactory.getLogger(AbstractHBaseWindowOutputOperator.class);
  
    private transient OutputAdapter<T> outputAdapter;
  
    public AbstractHBaseWindowOutputOperator()
    {
      outputAdapter = new OutputAdapter<T>(store, this);
    }
  
    @Override
    public void processTuple(T tuple)
    {
      outputAdapter.processTuple(tuple);
    }
  
    @Override
    public abstract void processTuple(T tuple, HTable table);
  
    /**
     * Get the table name for tuple.
     *
     * Implementations can override this method to return the table name where the tuple should be written to.
     * Return null to write to default table
     * @param tuple The tuple
     * @return The table name
     */
    @Override
    public String getTableName(T tuple)
    {
      return null;
    }
  
    @Override
    public void errorTuple(T tuple)
    {
  
    }
  
    @Override
    public void beforeCheckpoint(long l)
    {
      outputAdapter.flushTuples();
    }
  
    @Override
    public void checkpointed(long l)
    {
  
    }
  
    @Override
    public void committed(long l)
    {
  
    }
  
  }
  