com.google.appengine.tools.mapreduce

Interface ShardContext

All Superinterfaces:

Context

All Known Subinterfaces:

MapOnlyMapperContext<O>, MapperContext<K,V>, ReducerContext<O>, WorkerContext<O>

All Known Implementing Classes:

BaseShardContext, MergeContext, SortContext

public interface ShardContext
extends Context

Context for each shard.

Method Summary

Methods

Modifier and Type	Method and Description
Counter	getCounter(String name) Returns the Counter with the given name.
Counters	getCounters() Returns a Counters object for doing simple aggregate calculations.
int	getShardCount() Returns the total number of shards.
int	getShardNumber() Returns the number of this mapper or reducer shard (zero-based).
void	incrementCounter(String name) Increments the Counter with the given name by 1.
void	incrementCounter(String name, long delta) Increments the Counter with the given name by delta.

Methods inherited from interface com.google.appengine.tools.mapreduce.Context

getJobId

Method Detail

getShardCount

int getShardCount()

Returns the total number of shards.

getShardNumber

int getShardNumber()

Returns the number of this mapper or reducer shard (zero-based).

getCounters

Counters getCounters()

Returns a Counters object for doing simple aggregate calculations.

getCounter

Counter getCounter(String name)

Returns the Counter with the given name.

incrementCounter

void incrementCounter(String name,
                    long delta)

Increments the Counter with the given name by delta.

incrementCounter

void incrementCounter(String name)

Increments the Counter with the given name by 1.