com.google.appengine.tools.mapreduce.outputs

Class DatastoreOutput

java.lang.Object

com.google.appengine.tools.mapreduce.Output<com.google.appengine.api.datastore.Entity,Void>

com.google.appengine.tools.mapreduce.outputs.DatastoreOutput

All Implemented Interfaces:

Serializable

public class DatastoreOutput
extends Output<com.google.appengine.api.datastore.Entity,Void>

An Output that writes Entitys to the Datastore.

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DatastoreOutput.DatastoreOutputWriter

Constructor Summary

Constructors

Constructor and Description
DatastoreOutput()
DatastoreOutput(DatastoreMutationPool.Params poolParams)

Method Summary

Methods

Modifier and Type	Method and Description
List<DatastoreOutput.DatastoreOutputWriter>	createWriters(int numShards) Returns a list of writers, one for each shard, for this output.
Void	finish(Collection<? extends OutputWriter<com.google.appengine.api.datastore.Entity>> writers) Returns null.

Methods inherited from class com.google.appengine.tools.mapreduce.Output

getContext, setContext

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DatastoreOutput

public DatastoreOutput()

DatastoreOutput

public DatastoreOutput(DatastoreMutationPool.Params poolParams)

Method Detail

createWriters

public List<DatastoreOutput.DatastoreOutputWriter> createWriters(int numShards)

Description copied from class: Output

Returns a list of writers, one for each shard, for this output.

Specified by:

createWriters in class Output<com.google.appengine.api.datastore.Entity,Void>

Parameters:

numShards - The number of shards which should be equal to the number of OutputWriters returned.

finish

public Void finish(Collection<? extends OutputWriter<com.google.appengine.api.datastore.Entity>> writers)

Returns null.

Specified by:

finish in class Output<com.google.appengine.api.datastore.Entity,Void>