Uses of Class
org.apache.hadoop.mapreduce.Mapper.Context

Packages that use Mapper.Context

Package	Description
org.apache.hadoop.mapreduce
org.apache.hadoop.mapreduce.lib.aggregate
org.apache.hadoop.mapreduce.lib.chain
org.apache.hadoop.mapreduce.lib.fieldsel
org.apache.hadoop.mapreduce.lib.input
org.apache.hadoop.mapreduce.lib.map

Uses of Mapper.Context in org.apache.hadoop.mapreduce

Methods in org.apache.hadoop.mapreduce that return Mapper.Context

Modifier and Type	Method and Description
static <K1,V1,K2,V2> Mapper.Context	ContextFactory.cloneMapContext(MapContext<K1,V1,K2,V2> context, org.apache.hadoop.conf.Configuration conf, RecordReader<K1,V1> reader, RecordWriter<K2,V2> writer) Copy a custom WrappedMapper.Context, optionally replacing the input and output.

Methods in org.apache.hadoop.mapreduce with parameters of type Mapper.Context

Modifier and Type	Method and Description
protected void	Mapper.cleanup(Mapper.Context context) Called once at the end of the task.
protected void	Mapper.map(KEYIN key, VALUEIN value, Mapper.Context context) Called once for each key/value pair in the input split.
void	Mapper.run(Mapper.Context context) Expert users can override this method for more complete control over the execution of the Mapper.
protected void	Mapper.setup(Mapper.Context context) Called once at the beginning of the task.

Uses of Mapper.Context in org.apache.hadoop.mapreduce.lib.aggregate

Methods in org.apache.hadoop.mapreduce.lib.aggregate with parameters of type Mapper.Context

Modifier and Type	Method and Description
void	ValueAggregatorMapper.map(K1 key, V1 value, Mapper.Context context) the map function.
void	ValueAggregatorMapper.setup(Mapper.Context context)

Uses of Mapper.Context in org.apache.hadoop.mapreduce.lib.chain

Methods in org.apache.hadoop.mapreduce.lib.chain with parameters of type Mapper.Context

Modifier and Type	Method and Description
void	ChainMapper.run(Mapper.Context context)
protected void	ChainMapper.setup(Mapper.Context context)

Uses of Mapper.Context in org.apache.hadoop.mapreduce.lib.fieldsel

Methods in org.apache.hadoop.mapreduce.lib.fieldsel with parameters of type Mapper.Context

Modifier and Type	Method and Description
void	FieldSelectionMapper.map(K key, V val, Mapper.Context context) The identify function.
void	FieldSelectionMapper.setup(Mapper.Context context)

Uses of Mapper.Context in org.apache.hadoop.mapreduce.lib.input

Methods in org.apache.hadoop.mapreduce.lib.input with parameters of type Mapper.Context

Modifier and Type	Method and Description
void	DelegatingMapper.run(Mapper.Context context)
protected void	DelegatingMapper.setup(Mapper.Context context)

Uses of Mapper.Context in org.apache.hadoop.mapreduce.lib.map

Subclasses of Mapper.Context in org.apache.hadoop.mapreduce.lib.map

Modifier and Type	Class and Description
class	WrappedMapper.Context

Methods in org.apache.hadoop.mapreduce.lib.map that return Mapper.Context

Modifier and Type	Method and Description
Mapper.Context	WrappedMapper.getMapContext(MapContext<KEYIN,VALUEIN,KEYOUT,VALUEOUT> mapContext) Get a wrapped Mapper.Context for custom implementations.

Methods in org.apache.hadoop.mapreduce.lib.map with parameters of type Mapper.Context

Modifier and Type	Method and Description
void	RegexMapper.map(K key, org.apache.hadoop.io.Text value, Mapper.Context context)
void	InverseMapper.map(K key, V value, Mapper.Context context) The inverse function.
void	TokenCounterMapper.map(Object key, org.apache.hadoop.io.Text value, Mapper.Context context)
void	MultithreadedMapper.run(Mapper.Context context) Run the application's maps using a thread pool.
void	RegexMapper.setup(Mapper.Context context)