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WebSphere Extended Deployment Compute Grid Version 6.1.1

Batch data stream framework and patterns

Compute Grid provides a batch data stream (BDS) framework that includes pre-built code to work with popular streams like text, byte, database, datasets, and so on. You can implement an interface where the business logic for processing the stream is added. The pre-built code manages the opening, closing, externalizing/internalizing checkpoints, and so on.

You can use this feature if you have Version 6.1.0.3 or later installed.

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 Compute Grid provides:
BDS framework patterns and supporting classes

• 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
  RecordOrientedDatasetReaderPattern	Used to read a z/OS dataset.

• ZFileStreamOrientedTextReader
• ZFileStreamOrientedByteReader
• ZFileRecordOrientedDataReader|

  RecordOrientedDataSetWriterPattern

  Used to write to a z/OS dataset.

• 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 needed to create a new 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 and descriptions

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ThresholdPolicies

Threshold policies

Related links

• Developing Compute Grid applications

• Using the batch data stream framework

• Generic batch step

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