| 接口 | 说明 |
|---|---|
| ResetableIterator |
This defines an iterator interface that will help the reducer class
re-group its input by source tags.
|
| 类 | 说明 |
|---|---|
| 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.
|
Copyright © 2009 The Apache Software Foundation