Package dk.netarkivet.common.distribute.indexserver

Class TrivialJobIndexCache

java.lang.Object

dk.netarkivet.common.distribute.indexserver.TrivialJobIndexCache

All Implemented Interfaces:

JobIndexCache

public class TrivialJobIndexCache
extends Object
implements JobIndexCache

A trivial JobIndexCache implementation that just assumes somebody places the indexes in the right place (in TrivialJobIndexCache under the cache dir).

Constructor Summary

Constructors

Constructor	Description
TrivialJobIndexCache(RequestType t)	Construct a trivial cache that requires manual setup of files.

Method Summary

Modifier and Type	Method	Description
Index<Set<Long>>	getIndex(Set<Long> jobIDs)	Get an index for the given list of job IDs.
void	requestIndex(Set<Long> jobSet, Long harvestId)	Request an index from the indexserver.

Methods inherited from class java.lang.Object

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

Constructor Detail

TrivialJobIndexCache

public TrivialJobIndexCache(RequestType t)

Construct a trivial cache that requires manual setup of files.

The directory that the files are to be put into will be created by this method.

Parameters:

t - The type of requests handled

Method Detail

getIndex

public Index<Set<Long>> getIndex(Set<Long> jobIDs)

Get an index for the given list of job IDs. The resulting file contains a suitably sorted list. This method should always be safe for asynchronous calling. This method may use a cached version of the file.

Specified by:

getIndex in interface JobIndexCache

Parameters:

jobIDs - Set of job IDs to generate index for.

Returns:

A file containing the index, and always the full set. The file must not be modified or deleted, since it is part of the cache of data.

Throws:

IOFailure - if there is no cache file for the set.

requestIndex

public void requestIndex(Set<Long> jobSet,
                         Long harvestId)

Description copied from interface: JobIndexCache

Request an index from the indexserver. Prepare the index but don't give it to me.

Specified by:

requestIndex in interface JobIndexCache

Parameters:

jobSet - Set of job IDs to generate index for.

harvestId - Harvestdefinition associated with this set of jobs