org.eclipse.rdf4j.sail.lucene

Class AbstractReaderMonitor

java.lang.Object

org.eclipse.rdf4j.sail.lucene.AbstractReaderMonitor

Direct Known Subclasses:

ReaderMonitor

public abstract class AbstractReaderMonitor
extends Object

ReaderMonitor holds IndexReader and IndexSearcher. When ReaderMonitor is closed it do not close IndexReader and IndexSearcher as long as someone reads from them. Variable readingCount remember how many times it was read.

Author:

Tomasz Trela, DFKI Gmbh

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractReaderMonitor(AbstractLuceneIndex index)

Method Summary

Modifier and Type	Method and Description
void	beginReading()
void	close()
boolean	closeWhenPossible() This method is called in LecenIndex invalidateReaders or on commit
void	endReading() called by the iterator
int	getReadingCount()
protected abstract void	handleClose() This method is thread-safe (i.e.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractReaderMonitor

protected AbstractReaderMonitor(AbstractLuceneIndex index)

Method Detail

getReadingCount

public final int getReadingCount()

beginReading

public final void beginReading()

endReading

public final void endReading()
                      throws IOException

called by the iterator

Throws:

IOException

closeWhenPossible

public final boolean closeWhenPossible()
                                throws IOException

This method is called in LecenIndex invalidateReaders or on commit

Returns:

true if the close succeeded, false otherwise.

Throws:

IOException

close

public final void close()
                 throws IOException

Throws:

IOException

handleClose

protected abstract void handleClose()
                             throws IOException

This method is thread-safe (i.e. it is not called concurrently).

Throws:

IOException