org.springframework.batch.sample.domain.trade.internal

Class GeneratingTradeItemReader

java.lang.Object

org.springframework.batch.sample.domain.trade.internal.GeneratingTradeItemReader

All Implemented Interfaces:

ItemReader<Trade>

public class GeneratingTradeItemReader
extends java.lang.Object
implements ItemReader<Trade>

Generates configurable number of Trade items.

Author:

Robert Kasanicky

Constructor Summary

Constructors

Constructor and Description
GeneratingTradeItemReader()

Method Summary

Modifier and Type	Method and Description
int	getCounter()
int	getLimit()
Trade	read() Reads a piece of input data and advance to the next one.
void	resetCounter()
void	setLimit(int limit)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

GeneratingTradeItemReader

public GeneratingTradeItemReader()

Method Detail

read

public Trade read()
           throws java.lang.Exception

Description copied from interface: ItemReader

Reads a piece of input data and advance to the next one. Implementations must return null at the end of the input data set. In a transactional setting, caller might get the same item twice from successive calls (or otherwise), if the first call was in a transaction that rolled back.

Specified by:

read in interface ItemReader<Trade>

Returns:

T the item to be processed

Throws:

ParseException - if there is a problem parsing the current record (but the next one may still be valid)

NonTransientResourceException - if there is a fatal exception in the underlying resource. After throwing this exception implementations should endeavour to return null from subsequent calls to read.

UnexpectedInputException - if there is an uncategorised problem with the input data. Assume potentially transient, so subsequent calls to read might succeed.

java.lang.Exception - if an there is a non-specific error.

setLimit

public void setLimit(int limit)

Parameters:

limit - number of items that will be generated (null returned on consecutive calls).

getCounter

public int getCounter()

getLimit

public int getLimit()

resetCounter

public void resetCounter()