io.cdap.cdap.api.mapreduce

Class MapReduceSpecification

java.lang.Object

io.cdap.cdap.api.AbstractProgramSpecification

io.cdap.cdap.api.mapreduce.MapReduceSpecification

All Implemented Interfaces:

PropertyProvider, ProgramSpecification

public class MapReduceSpecification
extends AbstractProgramSpecification
implements PropertyProvider

This class provides the specification for a MapReduce job.

Constructor Summary

Constructors

Constructor and Description
MapReduceSpecification(String className, String name, String description, String inputDataSet, String outputDataSet, Set<String> dataSets, Map<String,String> properties, Resources driverResources, Resources mapperResources, Resources reducerResources, Map<String,Plugin> plugins)

Method Summary

Modifier and Type	Method and Description
Set<String>	getDataSets()
Resources	getDriverResources()
String	getInputDataSet()
Resources	getMapperResources()
String	getOutputDataSet()
Map<String,String>	getProperties() Returns an immutable Map of all properties.
String	getProperty(String key) Return the property value of a given key.
Resources	getReducerResources()

Methods inherited from class io.cdap.cdap.api.AbstractProgramSpecification

getClassName, getDescription, getName, getPlugins

Methods inherited from class java.lang.Object

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

Constructor Detail

MapReduceSpecification

public MapReduceSpecification(String className,
                              String name,
                              String description,
                              String inputDataSet,
                              String outputDataSet,
                              Set<String> dataSets,
                              Map<String,String> properties,
                              @Nullable
                              Resources driverResources,
                              @Nullable
                              Resources mapperResources,
                              @Nullable
                              Resources reducerResources,
                              Map<String,Plugin> plugins)

Method Detail

getProperties

public Map<String,String> getProperties()

Description copied from interface: PropertyProvider

Returns an immutable Map of all properties.

Specified by:

getProperties in interface PropertyProvider

getProperty

public String getProperty(String key)

Description copied from interface: PropertyProvider

Return the property value of a given key.

Specified by:

getProperty in interface PropertyProvider

Parameters:

key - for getting specific property value.

Returns:

The value associated with the key or null if not such key exists.

getDataSets

public Set<String> getDataSets()

Returns:

An immutable set of DataSets that are used by the MapReduce.

getOutputDataSet

@Nullable
public String getOutputDataSet()

Returns:

name of the dataset to be used as output of mapreduce job or null if no dataset is used as output destination

getInputDataSet

@Nullable
public String getInputDataSet()

Returns:

name The name of the dataset to be used as input to a MapReduce job or null if no dataset is used as the input source.

getDriverResources

@Nullable
public Resources getDriverResources()

Returns:

Resources requirement for driver or null if not specified.

getMapperResources

@Nullable
public Resources getMapperResources()

Returns:

Resources requirement for mapper task or null if not specified.

getReducerResources

@Nullable
public Resources getReducerResources()

Returns:

Resources requirement for reducer task or null if not specified.