org.demac.process.base.persistence
Class ProcessPersistenceService

java.lang.Object
  org.demac.process.base.persistence.ProcessPersistenceService

Direct Known Subclasses:

ProcessPersistenceServiceImpl

public abstract class ProcessPersistenceService
extends java.lang.Object

The ProcessPersistenceService loads a process and it's extensional data from the persistence storage only once. This is needed, because there can be concurrent actions an the same process. If two Threads would both load the process data direct from the storage, they would overwrite the changes of the other Thread.

Constructor Summary

ProcessPersistenceService()

Method Summary

abstract AmplifiedPackage	getProcess(int id) Gets an AmplifiedPackage of the process.
static ProcessPersistenceService	getProcessPersistenceService()
abstract void	updateProcess(AmplifiedPackage ap) Saves the state of the process in the persistence storage
abstract void	updateProcess(DataSet ds, Package pack) Saves the state of the process in the persistence storage, but leaves the data-extensions untouched

Methods inherited from class java.lang.Object

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

Constructor Detail

ProcessPersistenceService

public ProcessPersistenceService()

Method Detail

getProcessPersistenceService

public static ProcessPersistenceService getProcessPersistenceService()

Returns:

null if the service has not been started yet

getProcess

public abstract AmplifiedPackage getProcess(int id)
                                     throws ParserException

Gets an AmplifiedPackage of the process. If it is already in the memory, that instance is returned. Otherwhise, a new instance is created from the storage.

Parameters:

id - storage id in the persistence storage

Throws:

ParserException

updateProcess

public abstract void updateProcess(AmplifiedPackage ap)
                            throws StorageException

Saves the state of the process in the persistence storage

Parameters:

ap - Process

Throws:

StorageException

updateProcess

public abstract void updateProcess(DataSet ds,
                                   Package pack)
                            throws StorageException

Saves the state of the process in the persistence storage, but leaves the data-extensions untouched

Parameters:

ds - DataSet, where the process is stored

pack - Process

Throws:

StorageException