Network Deployment (Distributed operating systems), v8.0 > Develop and deploying applications > Develop batch applications > Develop batch applications > Use the batch data stream (BDS) framework
Batch data stream framework and patterns
The batch environment provides a batch data stream (BDS) framework that includes pre-built code to work with streams such as text, byte, database, and data sets. We can implement an interface where the business logic for processing the stream is added. The pre-built code manages actions such as opening, closing, and externalizing and internalizing checkpoints.
BDS framework patterns
A BDS framework pattern is a simple Java TM interface for a particular type of data stream that a user implements to insert business logic. The BDS framework has several supporting classes for each pattern that do most of the mundane tasks related to stream management. The following table shows the patterns that the batch environment provides:
BDS framework patterns. The table includes the pattern name, description, and supporting classes.
Pattern name Description Support classes JDBCReaderPattern Used to retrieve data from a database using a JDBC connection.
- LocalJDBCReader
- JDBCReader
- CursorHoldableJDBCReader
JDBCWriterPattern Used to write data to a database using a JDBC connection.
- LocalJDBCWriter
- JDBCWriter
ByteReaderPattern Used to read byte data from a file. FileByteReader ByteWriterPattern Used to write byte data from a file. FileByteWriter FileReaderPattern Used to read a text file. TextFileReader FileWriterPattern Used to write to a text file. TextFileWriter Used to read a z/OS data set.
- ZFileStreamOrientedTextReader
- ZFileStreamOrientedByteReader
- ZFileRecordOrientedDataReader
Used to write to a z/OS data set.
- ZFileStreamOrientedTextWriter
- ZFileStreamOrientedByteWriter
- ZFileRecordOrientedDataReader
JPAReaderPattern Used to retrieve data from a database using OpenJPA JPAReader JPAWriterPattern Used to write data to a database using a Java Persistence API (JPA) connection. JPAWriter
BDS framework steps
BDS framework steps minimize the amount of work to create a batch step by performing the bookkeeping tasks related to step management and delegating the business logic to a class implemented by the user.
BDS framework steps. The table includes the framework step and description.
Step Description Implement the generic batch step (GenericXDBatchStep) A simple step that uses one input and one output stream. Implement the error tolerant step A simple step that uses one input, one output stream, and one error stream.
ThresholdPolicies
ThresholdPolicies. The table includes the step and description.
Step Description Declare the record based threshold policy (RecordBasedThresholdPolicy) This policy provides a batch implementation of the ThresholdPolicy interface. Declare the percentage-based threshold policy (PercentageBasedThresholdPolicy) This policy provides a batch implementation of the ThresholdPolicy interface
Develop batch applications
Use the batch data stream (BDS) framework
Implement the generic batch step (GenericXDBatchStep)