Class BufferedItemReader<R>
- java.lang.Object
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- org.apache.batchee.extras.typed.TypedItemReader<R,Serializable>
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- org.apache.batchee.extras.typed.NoStateTypedItemReader<R>
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- org.apache.batchee.extras.buffered.BufferedItemReader<R>
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- Type Parameters:
R- the return type of the reader
- All Implemented Interfaces:
javax.batch.api.chunk.ItemReader
public abstract class BufferedItemReader<R> extends NoStateTypedItemReader<R>
An ItemReader base class which provides a simple buffering mechanism. The intention is to have a single simple query inreadAllItems()which first reads all the items and have this class handle the rest. This simple Reader doesn't provide any checkpointInfo (ItemReader.checkpointInfo()) as we only read the items in one go.
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Constructor Summary
Constructors Constructor Description BufferedItemReader()
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Method Summary
All Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description protected RdoRead()protected abstract Iterator<R>readAllItems()This methods need to return all the items to be read.-
Methods inherited from class org.apache.batchee.extras.typed.NoStateTypedItemReader
close, doCheckpointInfo, doOpen
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Methods inherited from class org.apache.batchee.extras.typed.TypedItemReader
checkpointInfo, open, readItem
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Method Detail
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readAllItems
protected abstract Iterator<R> readAllItems()
This methods need to return all the items to be read. We will 'cache' them and iterate through them until all the items got consumed.- Returns:
- all the items to be read
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doRead
protected R doRead()
- Specified by:
doReadin classTypedItemReader<R,Serializable>
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