co.cask.cdap.data2.datafabric.dataset

Interface DatasetProvider

All Known Implementing Classes:

AbstractDatasetProvider, DefaultDatasetProvider

public interface DatasetProvider

Provides Dataset instances.

Method Summary

Methods

Modifier and Type	Method and Description
<T extends co.cask.cdap.api.dataset.Dataset> T	get(Id.DatasetInstance instance, ClassLoader classLoader, Map<String,String> arguments) Gets a dataset.
<T extends co.cask.cdap.api.dataset.Dataset> T	getOrCreate(Id.DatasetInstance instance, String type, co.cask.cdap.api.dataset.DatasetProperties creationProps, ClassLoader classLoader, Map<String,String> arguments) Gets a dataset, and creates it first if it doesn't yet exist.

Method Detail

get

<T extends co.cask.cdap.api.dataset.Dataset> T get(Id.DatasetInstance instance,
                                                 @Nullable
                                                 ClassLoader classLoader,
                                                 @Nullable
                                                 Map<String,String> arguments)
                                               throws Exception

Gets a dataset.

Type Parameters:

T - the type of dataset

Parameters:

instance - the dataset ID

classLoader - the classloader to use

arguments - the runtime arguments for the dataset

Returns:

the dataset

Throws:

Exception

getOrCreate

<T extends co.cask.cdap.api.dataset.Dataset> T getOrCreate(Id.DatasetInstance instance,
                                                         String type,
                                                         co.cask.cdap.api.dataset.DatasetProperties creationProps,
                                                         @Nullable
                                                         ClassLoader classLoader,
                                                         @Nullable
                                                         Map<String,String> arguments)
                                                       throws Exception

Gets a dataset, and creates it first if it doesn't yet exist.

Type Parameters:

T - the type of dataset

Parameters:

instance - the dataset ID

type - the type of dataset

creationProps - the creation properties

classLoader - the classloader to use

arguments - the runtime arguments for the dataset

Returns:

the dataset

Throws:

Exception