Package dk.netarkivet.archive.arcrepository.distribute

Class ArcRepositoryServer

java.lang.Object

dk.netarkivet.archive.distribute.ArchiveMessageHandler

dk.netarkivet.archive.arcrepository.distribute.ArcRepositoryServer

All Implemented Interfaces:

ArchiveMessageVisitor, CleanupIF, javax.jms.MessageListener

public class ArcRepositoryServer
extends ArchiveMessageHandler
implements CleanupIF

Listens on the queue "TheArcrepos" and submits the messages to a corresponding visit method on BitarchiveClient.

Constructor Summary

Constructors

Constructor	Description
ArcRepositoryServer(ArcRepository ar)	Creates and adds a ArcRepositoryMessageHandler as listener on the "TheArcrepos"-queue.

Method Summary

Modifier and Type	Method	Description
void	cleanup()	Used to clean up a class from within a shutdown hook.
void	close()	Removes the ArcRepositoryMessageHandler as listener.
void	visit(AdminDataMessage msg)	Update the admin data in the arcrepository.
void	visit(StoreMessage msg)	Forwards the call to the ArcRepository.store() method with the StoreMessage as parameter.
void	visit(BatchMessage msg)	Resends a batch message to the requested bitarchive.
void	visit(BatchReplyMessage msg)	Forwards the handling of batch replies to the arc repository.
void	visit(GetFileMessage msg)	Forwards a getfile message to requested bitarchive replica.
void	visit(GetMessage msg)	Forwards a get message to the local bitarchive.
void	visit(RemoveAndGetFileMessage msg)	Request a file to be deleted from bitarchives.
void	visit(UploadMessage msg)	Forwards the handling of upload replies to the arc repository.
void	visit(CorrectMessage msg)	Method for handling CorrectMessages.
void	visit(GetAllChecksumsMessage msg)	Method for retrieving all the checksums from a replica.
void	visit(GetAllFilenamesMessage msg)	For retrieving all the filenames from a replica.
void	visit(GetChecksumMessage msg)	Method for handling the results of a GetChecksumMessage.

Methods inherited from class dk.netarkivet.archive.distribute.ArchiveMessageHandler

onMessage, visit, visit

Methods inherited from class java.lang.Object

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

Constructor Detail

ArcRepositoryServer

public ArcRepositoryServer(ArcRepository ar)

Creates and adds a ArcRepositoryMessageHandler as listener on the "TheArcrepos"-queue.

Parameters:

ar - the ArcRepository

Method Detail

visit

public void visit(StoreMessage msg)

Forwards the call to the ArcRepository.store() method with the StoreMessage as parameter. In case of exception when calling store, a reply message is sent containing the message set as NotOK.

Specified by:

visit in interface ArchiveMessageVisitor

Overrides:

visit in class ArchiveMessageHandler

Parameters:

msg - the message to be processed by the store command.

visit

public void visit(RemoveAndGetFileMessage msg)

Request a file to be deleted from bitarchives. This request will be handled by the bitarchives, and the bitarchive containing the file will reply with the removed file if succesful, or with a notOk message if unsuccesful.

Will send a not-ok reply on exceptions handling this request.

Specified by:

visit in interface ArchiveMessageVisitor

Overrides:

visit in class ArchiveMessageHandler

Parameters:

msg - the message to be processed

visit

public void visit(AdminDataMessage msg)

Update the admin data in the arcrepository. Reply aftwerwards. Will reply with notOk on exceptions.

Specified by:

visit in interface ArchiveMessageVisitor

Overrides:

visit in class ArchiveMessageHandler

Parameters:

msg - the message to be processed

visit

public void visit(UploadMessage msg)
           throws ArgumentNotValid

Forwards the handling of upload replies to the arc repository. Will log errors, but otherwise ignore.

Specified by:

visit in interface ArchiveMessageVisitor

Overrides:

visit in class ArchiveMessageHandler

Parameters:

msg - a UploadMessage

Throws:

ArgumentNotValid - If the message is null.

visit

public void visit(BatchReplyMessage msg)
           throws ArgumentNotValid

Forwards the handling of batch replies to the arc repository. Will log errors, but otherwise ignore.

Specified by:

visit in interface ArchiveMessageVisitor

Overrides:

visit in class ArchiveMessageHandler

Parameters:

msg - a BatchReplyMessage

Throws:

ArgumentNotValid - If the message is null.

visit

public void visit(BatchMessage msg)
           throws ArgumentNotValid

Resends a batch message to the requested bitarchive.

Note that this circumvents the ArcRepository entirely and that the reply goes directly back to whoever set the message.

Specified by:

visit in interface ArchiveMessageVisitor

Overrides:

visit in class ArchiveMessageHandler

Parameters:

msg - the batch message to be resend.

Throws:

ArgumentNotValid - if parameters are null

visit

public void visit(GetMessage msg)
           throws ArgumentNotValid

Forwards a get message to the local bitarchive.

Note that this circumvents the ArcRepository entirely and that the reply goes directly back to whoever sent the message.

Specified by:

visit in interface ArchiveMessageVisitor

Overrides:

visit in class ArchiveMessageHandler

Parameters:

msg - the message to be processed by the get command.

Throws:

ArgumentNotValid - If the message is null.

visit

public void visit(GetFileMessage msg)
           throws ArgumentNotValid

Forwards a getfile message to requested bitarchive replica.

Note that this circumvents the ArcRepository entirely and that the reply goes directly back to whoever set the message.

Specified by:

visit in interface ArchiveMessageVisitor

Overrides:

visit in class ArchiveMessageHandler

Parameters:

msg - the message to be processed by the get command.

Throws:

ArgumentNotValid - If one of the arguments are null.

visit

public void visit(GetAllFilenamesMessage msg)
           throws ArgumentNotValid

For retrieving all the filenames from a replica.

Specified by:

visit in interface ArchiveMessageVisitor

Overrides:

visit in class ArchiveMessageHandler

Parameters:

msg - The message to be processed.

Throws:

ArgumentNotValid - If the argument is null.

visit

public void visit(GetAllChecksumsMessage msg)
           throws ArgumentNotValid

Method for retrieving all the checksums from a replica.

Specified by:

visit in interface ArchiveMessageVisitor

Overrides:

visit in class ArchiveMessageHandler

Parameters:

msg - The GetAllChecksumsMessage.

Throws:

ArgumentNotValid - If the GetAllChecksumsMessage is null.

visit

public void visit(GetChecksumMessage msg)

Method for handling the results of a GetChecksumMessage. This should be handled similar to a ReplyBatchMessage, when a batchjob has run on a single file.

Specified by:

visit in interface ArchiveMessageVisitor

Overrides:

visit in class ArchiveMessageHandler

Parameters:

msg - The GetChecksumMessage message.

visit

public void visit(CorrectMessage msg)
           throws ArgumentNotValid

Method for handling CorrectMessages. This message is just sent along to the corresponding replica archive, where the 'bad' entry will be corrected (made backup of and then replaced).

Specified by:

visit in interface ArchiveMessageVisitor

Overrides:

visit in class ArchiveMessageHandler

Parameters:

msg - The message for correcting a bad entry in an archive.

Throws:

ArgumentNotValid - If the CorrectMessage is null.

close

public void close()

Removes the ArcRepositoryMessageHandler as listener.

cleanup

public void cleanup()

Description copied from interface: CleanupIF

Used to clean up a class from within a shutdown hook. Must not do any logging. Program defensively, please.

Specified by:

cleanup in interface CleanupIF