Package org.apache.hadoop.contrib.utils.join

Interface Summary

ResetableIterator

This defines an iterator interface that will help the reducer class re-group its input by source tags.

Class Summary

ArrayListBackedIterator	This class provides an implementation of ResetableIterator.
DataJoinJob	This class implements the main function for creating a map/reduce job to join data of different sources.
DataJoinMapperBase	This abstract class serves as the base class for the mapper class of a data join job.
DataJoinReducerBase	This abstract class serves as the base class for the reducer class of a data join job.
JobBase	A common base implementing some statics collecting mechanisms that are commonly used in a typical map/reduce job.
TaggedMapOutput	This abstract class serves as the base class for the values that flow from the mappers to the reducers in a data join job.