| Package | Description |
|---|---|
| org.apache.hadoop.mapreduce | |
| org.apache.hadoop.mapreduce.lib.map | |
| org.apache.hadoop.mapreduce.lib.reduce | |
| org.apache.hadoop.mapreduce.task |
| Modifier and Type | Interface and Description |
|---|---|
interface |
JobContext
A read-only view of the job that is provided to the tasks while they
are running.
|
interface |
MapContext<KEYIN,VALUEIN,KEYOUT,VALUEOUT>
The context that is given to the
Mapper. |
interface |
ReduceContext<KEYIN,VALUEIN,KEYOUT,VALUEOUT>
The context passed to the
Reducer. |
interface |
TaskAttemptContext
The context for task attempts.
|
interface |
TaskInputOutputContext<KEYIN,VALUEIN,KEYOUT,VALUEOUT>
A context object that allows input and output from the task.
|
| Modifier and Type | Class and Description |
|---|---|
class |
Job
The job submitter's view of the Job.
|
class |
Mapper.Context
The
Context passed on to the Mapper implementations. |
class |
Reducer.Context
The
Context passed on to the Reducer implementations. |
| Modifier and Type | Class and Description |
|---|---|
class |
WrappedMapper.Context |
| Modifier and Type | Class and Description |
|---|---|
class |
WrappedReducer.Context |
| Modifier and Type | Class and Description |
|---|---|
class |
JobContextImpl
A read-only view of the job that is provided to the tasks while they
are running.
|
class |
MapContextImpl<KEYIN,VALUEIN,KEYOUT,VALUEOUT>
The context that is given to the
Mapper. |
class |
ReduceContextImpl<KEYIN,VALUEIN,KEYOUT,VALUEOUT>
The context passed to the
Reducer. |
class |
TaskAttemptContextImpl
The context for task attempts.
|
class |
TaskInputOutputContextImpl<KEYIN,VALUEIN,KEYOUT,VALUEOUT>
A context object that allows input and output from the task.
|
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