org.imixs.workflow.office.util

Class SequenceService

java.lang.Object

org.imixs.workflow.office.util.SequenceService

@DeclareRoles(value={"org.imixs.ACCESSLEVEL.NOACCESS","org.imixs.ACCESSLEVEL.READERACCESS","org.imixs.ACCESSLEVEL.AUTHORACCESS","org.imixs.ACCESSLEVEL.EDITORACCESS","org.imixs.ACCESSLEVEL.MANAGERACCESS"})
 @RolesAllowed(value={"org.imixs.ACCESSLEVEL.NOACCESS","org.imixs.ACCESSLEVEL.READERACCESS","org.imixs.ACCESSLEVEL.AUTHORACCESS","org.imixs.ACCESSLEVEL.EDITORACCESS","org.imixs.ACCESSLEVEL.MANAGERACCESS"})
 @RunAs(value="org.imixs.ACCESSLEVEL.MANAGERACCESS")
public class SequenceService
extends Object

The SequcneceService is a singleton EJB which handles continuous sequenceNumbers for a workitem separated for each workflowGroup.

The sequence numbers are stored in the item 'sequencenumbers' of the configuration entity with the name "BASIC" in in the following format

[GROUP]=123

Optimistic Locking Problem

In earlier versions, the method runs in a OptimisticLockException in case that multiple processes run in parallel. To fix this the service is changed into a singleton. See issue #290.

Author:

rsoika

Constructor Summary

Constructors

Constructor and Description
SequenceService()

Method Summary

Modifier and Type	Method and Description
void	computeSequenceNumber(org.imixs.workflow.ItemCollection documentContext) This method computes the sequence number based on a configuration entity with the name "BASIC".

Methods inherited from class java.lang.Object

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

Constructor Detail

SequenceService

public SequenceService()

Method Detail

computeSequenceNumber

public void computeSequenceNumber(org.imixs.workflow.ItemCollection documentContext)
                           throws org.imixs.workflow.exceptions.AccessDeniedException

This method computes the sequence number based on a configuration entity with the name "BASIC". The configuration provides a property 'sequencenumbers' with the current number range for each workflowGroup. If a Workitem have a WorkflowGroup with no corresponding entry the method will not compute a new number.

This method loads and updates the configuration entity in a new transaction. In combination with the

Throws:

InvalidWorkitemException

org.imixs.workflow.exceptions.AccessDeniedException