Package org.aksw.jenax.dataaccess.sparql.link.query

Class IteratorDelegateWithWorkerThread<T,I extends Iterator<T>>

java.lang.Object

org.aksw.commons.collections.PrefetchIterator<T>

org.aksw.jenax.dataaccess.sparql.link.query.IteratorDelegateWithWorkerThread<T,I>

All Implemented Interfaces:

Closeable, AutoCloseable, Iterator<T>, org.apache.jena.atlas.iterator.IteratorCloseable<T>, org.apache.jena.atlas.lib.Closeable

public class IteratorDelegateWithWorkerThread<T,I extends Iterator<T>>
extends org.aksw.commons.collections.PrefetchIterator<T>
implements org.apache.jena.atlas.iterator.IteratorCloseable<T>

Field Summary

Fields

Modifier and Type	Field	Description
protected int	batchSize	Number of items to transfer in batch from the worker thread to the calling thread
protected I	delegate
protected WorkerThreadBase	helper

Constructor Summary

Constructors

Constructor	Description
IteratorDelegateWithWorkerThread(I delegate, ExecutorService es)
IteratorDelegateWithWorkerThread(I delegate, ExecutorService es, int batchSize)

Method Summary

Modifier and Type	Method	Description
void	close()
protected T	copy(T item)	Certain objects such as TDB2 Bindings must be copied in order to detach them from resources that are free'd when the iterator is closed.
I	getDelegate()
protected Iterator<T>	prefetch()

Methods inherited from class org.aksw.commons.collections.PrefetchIterator

hasNext, next, remove

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining, hasNext, next, remove

Field Details

helper

protected WorkerThreadBase helper

batchSize

protected int batchSize

Number of items to transfer in batch from the worker thread to the calling thread

delegate

protected I extends Iterator<T> delegate

Constructor Details

IteratorDelegateWithWorkerThread

public IteratorDelegateWithWorkerThread(I delegate,
 ExecutorService es)

IteratorDelegateWithWorkerThread

public IteratorDelegateWithWorkerThread(I delegate,
 ExecutorService es,
 int batchSize)

Method Details

getDelegate

public I getDelegate()

copy

protected T copy(T item)

Certain objects such as TDB2 Bindings must be copied in order to detach them from resources that are free'd when the iterator is closed.

prefetch

protected Iterator<T> prefetch()
                        throws Exception

Specified by:

prefetch in class org.aksw.commons.collections.PrefetchIterator<T>

Throws:

Exception

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in interface org.apache.jena.atlas.lib.Closeable

Overrides:

close in class org.aksw.commons.collections.PrefetchIterator<T>