Java Doc for UnitOfWork.java in  » Content-Management-System » apache-lenya-2.0 » org » apache » lenya » transaction » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Content Management System » apache lenya 2.0 » org.apache.lenya.transaction 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


org.apache.lenya.transaction.UnitOfWork

All known Subclasses:   org.apache.lenya.transaction.UnitOfWorkImpl,
UnitOfWork
public interface UnitOfWork (Code)
This is a "Unit of Work" object (see "Unit of Work" pattern by Martin Fowler, http://www.martinfowler.com/eaaCatalog/unitOfWork.html : the unit of work "maintains a list of objects affected by a business transaction and coordinates the writing out of changes and the resolution of concurrency problems".

In the current design, this interface allows a use case to generate documents, while ensuring that only one instance of a document is created. This access is provided by the DocumentIdentityMap's DocumentFactory.

This interface may be extended in the future to allow for access to further types of business objects.


version:
   $Id: UnitOfWork.java 534530 2007-05-02 16:24:22Z andreas $




Method Summary
 voidcommit()
     Commits the transaction.
 LockcreateLock(Lockable lockable, int version)
     Creates a lock.
Parameters:
  lockable - The lockable.
Parameters:
  version - The version.
 booleanisDirty(Transactionable transactionable)
    
Parameters:
  transactionable - A transactionable.
 voidregisterDirty(Transactionable object)
     Registers an object as modified.
 voidregisterNew(Transactionable object)
     Registers an object as new.
 voidregisterRemoved(Transactionable object)
     Registers an object as removed.
 voidremoveLock(Lockable lockable)
     Removes a lock.
 voidrollback()
     Rolls the transaction back.



Method Detail
commit
void commit() throws TransactionException(Code)
Commits the transaction.
throws:
  TransactionException - if an error occurs.



createLock
Lock createLock(Lockable lockable, int version) throws TransactionException(Code)
Creates a lock.
Parameters:
  lockable - The lockable.
Parameters:
  version - The version. A lock.
throws:
  TransactionException - if a lock is already placed on this transactionable.



isDirty
boolean isDirty(Transactionable transactionable)(Code)

Parameters:
  transactionable - A transactionable. If the transactionable is registered as dirty.



registerDirty
void registerDirty(Transactionable object) throws TransactionException(Code)
Registers an object as modified.
Parameters:
  object - The object.
throws:
  TransactionException - if an error occurs.



registerNew
void registerNew(Transactionable object) throws TransactionException(Code)
Registers an object as new.
Parameters:
  object - The object.
throws:
  TransactionException - if an error occurs.



registerRemoved
void registerRemoved(Transactionable object) throws TransactionException(Code)
Registers an object as removed.
Parameters:
  object - The object.
throws:
  TransactionException - if an error occurs.



removeLock
void removeLock(Lockable lockable) throws TransactionException(Code)
Removes a lock.
Parameters:
  lockable - The lockable.
throws:
  TransactionException - if no lock is placed on this transactionable.



rollback
void rollback() throws TransactionException(Code)
Rolls the transaction back.
throws:
  TransactionException - if an error occurs.



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