Network Deployment (Distributed operating systems), v8.0 > Reference > Developer detailed usage information

ByteReaderPattern

This pattern is used to read byte data from a file.

Support classes

The FileByteReader class provides the logic for opening and reading byte data from the given file.

Required properties

The following properties are required for the pattern.

Required properties. The table includes the name and value of each required property for the pattern.

Property name	Value
PATTERN_IMPL_CLASS	Class implementing ByteReaderPattern interface
FILENAME	Complete path to the input file

Optional properties

The following properties are optional for the pattern.

Optional properties. The table includes the name, value, and description of each optional property for the pattern.

Property name	Value	Description
debug	true or false (default is false)	Enables detailed tracing on this batch data stream.
EnablePerformanceMeasurement	true or false (default is false)	Calculates the total time spent in the batch data streams and the processRecord method, if you are using the GenericXDBatchStep.
EnableDetailedPerformanceMeasurement	true or false (default is false)	Provides a more detailed breakdown of time spent in each method of the batch data streams.
file.encoding	Encode of the file.	For example, 8859_1
AppendJobldToFileName	true or false (default is false)	Appends the JobID to the file name before loading the file.

Interface definition

public interface ByteReaderPattern {

 /**
  * Is called by the framework during Step setup stage
  * @param props
  */
 public void initialize(Properties props);

 /**
  *
  * @param reader
  * @throws IOException
  */

 public void processHeader(BufferedInputStream reader) throws IOException;

 /**
  * Get the next record from the input stream
  * @param reader
  * @return
  * @throws IOException
  */
 public Object fetchRecord(BufferedInputStream reader) throws IOException;
}

xJCL example

<batch-data-streams>
<bds>
<logical-name>inputStream
</logical-name>
<props>
<prop name="PATTERN_IMPL_CLASS" value="com.ibm.websphere.batch.samples.tests.bds.EchoReader"/>
<prop name="file.encoding" value="8859_1"/>
<prop name="FILENAME" value="/opt/txlist.txt" />
<prop name="debug" value="true"/>
</props>
<impl-class>com.ibm.websphere.batch.devframework.datastreams.patterns.FileByteReader
</impl-class>
</bds>
</batch-data-streams> 

Batch data stream framework and patterns
Use the batch data stream (BDS) framework
JDBCReaderPattern
JDBCWriterPattern
ByteWriterPattern
FileReaderPattern
FileWriterPattern
JPAReaderPattern
JPAWriterPattern

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