Package org.dspace.checker

Class SimpleDispatcher

java.lang.Object

org.dspace.checker.SimpleDispatcher

All Implemented Interfaces:

BitstreamDispatcher

public class SimpleDispatcher
extends Object
implements BitstreamDispatcher

An implementation of the selection strategy that selects bitstreams in the order that they were last checked, looping endlessly.

Author:

Jim Downing, Grace Carpenter, Nathan Sarr

Field Summary

Fields

Modifier and Type	Field	Description
protected MostRecentChecksumService	checksumService	Access for bitstream information
protected Context	context
protected boolean	loopContinuously	Should this dispatcher keep on dispatching around the collection?
protected Instant	processStartTime	Date this dispatcher started dispatching.

Fields inherited from interface org.dspace.checker.BitstreamDispatcher

SENTINEL

Constructor Summary

Constructors

Constructor	Description
SimpleDispatcher(Context context, Instant startTime, boolean looping)	Creates a new SimpleDispatcher.

Method Summary

Modifier and Type	Method	Description
Bitstream	next()	Selects the next candidate bitstream.

Methods inherited from class java.lang.Object

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

Field Details

loopContinuously

protected boolean loopContinuously

Should this dispatcher keep on dispatching around the collection?

processStartTime

protected Instant processStartTime

Date this dispatcher started dispatching.

checksumService

protected MostRecentChecksumService checksumService

Access for bitstream information

context

protected Context context

Constructor Details

SimpleDispatcher

public SimpleDispatcher(Context context,
 Instant startTime,
 boolean looping)

Creates a new SimpleDispatcher.

Parameters:

context - Context

startTime - timestamp for beginning of checker process

looping - indicates whether checker should loop infinitely through most_recent_checksum table

Method Details

next

public Bitstream next()
               throws SQLException

Selects the next candidate bitstream.

Specified by:

next in interface BitstreamDispatcher

Returns:

the next bitstream id, or BitstreamDispatcher.SENTINEL if there isn't another value

Throws:

SQLException - if database error

See Also:

• BitstreamDispatcher.next()