# Package org.apache.hadoop.mapred.nativetask.handlers

- Interface Summary
  Interface | Description
  --- | ---
  IDataLoader | an IDataLoader loads data on demand

- Class Summary
  Class | Description
  --- | ---
  BufferPullee<IK,IV> | load data into a buffer signaled by a `BufferPuller`
  BufferPuller | actively signal a `BufferPullee` to load data into buffer and receive
  BufferPushee<OK,OV> | collect data when signaled
  BufferPusher<K,V> | actively push data into a buffer and signal a `BufferPushee` to collect it
  NativeCollectorOnlyHandler<K,V> | Java Record Reader + Java Mapper + Native Collector

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