Package io.cdap.cdap.api.data.batch

Allows MapReduce jobs to read from and write to datasets.

See: Description

Interface Summary

Interface	Description
BatchReadable<KEY,VALUE>	Interface for datasets that can be input to a batch job.
BatchWritable<KEY,VALUE>	Interface for the dataset that a batch job can output to.
DatasetOutputCommitter	This interface is implemented by a dataset if at the end of a batch job (MapReduce, Spark, ...) the output needs to be committed, or rolled back, depending on success of the job.
InputContext	Exposes information about the input configured for this task.
InputFormatProvider	Interface to be implemented by datasets used as input to a MapReduce.
OutputFormatProvider	Interface to be implemented by datasets used as output of a MapReduce.
PartitionedFileSetInputContext	Exposes information about the PartitionedFileSet input configured for this task.
RecordScannable<RECORD>	Represents data sets that can be processed in batches, as series of records (as apposed to key/value pairs).
RecordWritable<RECORD>	Interface for a dataset that a batch job can output to, as series of records (as apposed to key/value pairs).
Scannables.RecordMaker<KEY,VALUE,RECORD>	Provides a way to convert a key and a value - as provided by a split reader - in to a single record object.

Class Summary

Class	Description
Input	Defines input to a program, such as MapReduce.
Input.DatasetInput	An implementation of Input, which defines a Dataset as an input.
Input.InputFormatProviderInput	An implementation of Input, which defines an InputFormatProvider as an input.
IteratorBasedSplitReader<KEY,VALUE>	Handy implementation of SplitReader backed by Iterator.
Output	Defines output of a program, such as MapReduce.
Output.DatasetOutput	An implementation of Output, which defines a Dataset as an output.
Output.OutputFormatProviderOutput	An implementation of Output, which defines an OutputFormatProvider as an output.
RecordScanner<RECORD>	Defines a reader of a dataset Split.
Scannables	Utility methods for record scanners.
SimpleSplit	Handy implementation of the Split.
Split	Defines split of the dataset.
SplitReader<KEY,VALUE>	Defines a reader of a dataset Split.
SplitReaderAdapter<FROM_KEY,TO_KEY,FROM_VALUE,TO_VALUE>	Handy adaptor for SplitReader to convert types.
SplitReaderBase<KEY,VALUE>	Provides an abstract implementation of SplitReader.
Splits	Utility class to serialize and deserialize Split.

Package io.cdap.cdap.api.data.batch Description

Allows MapReduce jobs to read from and write to datasets.