org.fcrepo.kernel.services

Class TransactionServiceImpl

java.lang.Object

org.modeshape.jcr.api.JcrTools

org.fcrepo.kernel.services.AbstractService

org.fcrepo.kernel.services.TransactionServiceImpl

All Implemented Interfaces:

org.fcrepo.jcr.FedoraJcrTypes, org.fcrepo.kernel.services.Service, org.fcrepo.kernel.services.TransactionService

@Component
public class TransactionServiceImpl
extends AbstractService
implements org.fcrepo.kernel.services.TransactionService

This is part of the strawman implementation for Fedora transactions This service implements a simple Transaction service which is able to create/commit/rollback Transaction objects A Scheduled annotation is used for removing timed out Transactions

Author:

frank asseg

Nested Class Summary

Nested classes/interfaces inherited from class org.modeshape.jcr.api.JcrTools

org.modeshape.jcr.api.JcrTools.BasicOperation, org.modeshape.jcr.api.JcrTools.BrowseContent, org.modeshape.jcr.api.JcrTools.CountNodes, org.modeshape.jcr.api.JcrTools.NodeOperation, org.modeshape.jcr.api.JcrTools.Operation, org.modeshape.jcr.api.JcrTools.PrintNodes, org.modeshape.jcr.api.JcrTools.Variable

Field Summary

Fields

Modifier and Type	Field and Description
static long	REAP_INTERVAL

Fields inherited from class org.fcrepo.kernel.services.AbstractService

repo

Fields inherited from interface org.fcrepo.jcr.FedoraJcrTypes

CONTENT_DIGEST, CONTENT_SIZE, FCR_CONTENT, FCR_LOCK, FCR_VERSIONS, FEDORA_BINARY, FEDORA_DATASTREAM, FEDORA_OBJECT, FEDORA_RESOURCE, FROZEN_MIXIN_TYPES, FROZEN_NODE, JCR_CREATED, JCR_CREATEDBY, JCR_LASTMODIFIED, PREMIS_FILE_NAME, ROOT

Constructor Summary

Constructors

Constructor and Description
TransactionServiceImpl()

Method Summary

Methods

Modifier and Type	Method and Description
org.fcrepo.kernel.Transaction	beginTransaction(javax.jcr.Session sess, String userName) Create a new Transaction and add it to the currently open ones
org.fcrepo.kernel.Transaction	commit(String txid) Commit a Transaction with the given id
boolean	exists(String txid) Check if a Transaction exists
static String	getCurrentTransactionId(javax.jcr.Session session) Get the current Transaction ID for a session
org.fcrepo.kernel.Transaction	getTransaction(javax.jcr.Session session) Get the current Transaction for a session
org.fcrepo.kernel.Transaction	getTransaction(String txid) Retrieve an open Transaction
boolean	isAssociatedWithUser(String txId, String userName) Checks if a user is bound to a Transaction
void	removeAndRollbackExpired() Every REAP_INTERVAL milliseconds, check for expired transactions.
org.fcrepo.kernel.Transaction	rollback(String txid) Roll a Transaction back
void	setVersionService(org.fcrepo.kernel.services.VersionService versionService)

Methods inherited from class org.fcrepo.kernel.services.AbstractService

exists, setRepository

Methods inherited from class org.modeshape.jcr.api.JcrTools

findOrCreateChild, findOrCreateChild, findOrCreateNode, findOrCreateNode, findOrCreateNode, findOrCreateNode, getNode, getReadable, getStringValue, importContent, importContent, importContent, importContent, importContent, importContent, importContent, isDebug, onEachNode, onEachNodeBelow, print, printNode, printQuery, printQuery, printQuery, printQuery, printSubgraph, printSubgraph, printSubgraph, registerNodeTypes, removeAllChildren, removeAllChildren, repeatedlyWithSession, resourceUrl, uploadFile, uploadFile, uploadFile, uploadFileAndBlock, uploadFileAndBlock, uploadFileAndBlock, uploadFilesAndBlock, var, vars, withSession

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.fcrepo.kernel.services.Service

exists, setRepository

Field Detail

REAP_INTERVAL

public static final long REAP_INTERVAL

See Also:

Constant Field Values

Constructor Detail

TransactionServiceImpl

public TransactionServiceImpl()

Method Detail

removeAndRollbackExpired

@Scheduled(fixedRate=1000L)
public void removeAndRollbackExpired()

Every REAP_INTERVAL milliseconds, check for expired transactions. If the tx is expired, roll it back and remove it from the registry.

Specified by:

removeAndRollbackExpired in interface org.fcrepo.kernel.services.TransactionService

beginTransaction

public org.fcrepo.kernel.Transaction beginTransaction(javax.jcr.Session sess,
                                             String userName)
                                               throws javax.jcr.RepositoryException

Create a new Transaction and add it to the currently open ones

Specified by:

beginTransaction in interface org.fcrepo.kernel.services.TransactionService

Parameters:

sess - The session to use for this Transaction

Returns:

the Transaction

Throws:

javax.jcr.RepositoryException

getTransaction

public org.fcrepo.kernel.Transaction getTransaction(String txid)
                                             throws org.fcrepo.kernel.exception.TransactionMissingException

Retrieve an open Transaction

Specified by:

getTransaction in interface org.fcrepo.kernel.services.TransactionService

Parameters:

txid - the Id of the Transaction

Returns:

the Transaction

Throws:

org.fcrepo.kernel.exception.TransactionMissingException

getTransaction

public org.fcrepo.kernel.Transaction getTransaction(javax.jcr.Session session)
                                             throws org.fcrepo.kernel.exception.TransactionMissingException

Get the current Transaction for a session

Specified by:

getTransaction in interface org.fcrepo.kernel.services.TransactionService

Parameters:

session -

Returns:

Throws:

org.fcrepo.kernel.exception.TransactionMissingException

getCurrentTransactionId

public static String getCurrentTransactionId(javax.jcr.Session session)

Get the current Transaction ID for a session

Parameters:

session -

Returns:

exists

public boolean exists(String txid)

Check if a Transaction exists

Specified by:

exists in interface org.fcrepo.kernel.services.TransactionService

Parameters:

txid - the Id of the Transaction

Returns:

the Transaction

commit

public org.fcrepo.kernel.Transaction commit(String txid)
                                     throws javax.jcr.RepositoryException

Commit a Transaction with the given id

Specified by:

commit in interface org.fcrepo.kernel.services.TransactionService

Parameters:

txid - the id of the Transaction

Throws:

javax.jcr.RepositoryException

rollback

public org.fcrepo.kernel.Transaction rollback(String txid)
                                       throws javax.jcr.RepositoryException

Roll a Transaction back

Specified by:

rollback in interface org.fcrepo.kernel.services.TransactionService

Parameters:

txid - the id of the Transaction

Returns:

the Transaction object

Throws:

javax.jcr.RepositoryException - if the Transaction could not be found

isAssociatedWithUser

public boolean isAssociatedWithUser(String txId,
                           String userName)

Checks if a user is bound to a Transaction

Specified by:

isAssociatedWithUser in interface org.fcrepo.kernel.services.TransactionService

Parameters:

txId - the id of the Transaction

userName - the name of the Principal

Returns:

if the transaction was created by this user

setVersionService

public void setVersionService(org.fcrepo.kernel.services.VersionService versionService)

Specified by:

setVersionService in interface org.fcrepo.kernel.services.TransactionService

Parameters:

versionService - the versionService to set