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

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	SequenceService.SequenceNumber A SequenceNumber is a internal object separating a fixed part form a number part.

Field Summary

Fields

Modifier and Type	Field and Description
static String	ITEM_SEQUENCENUMBER
static String	ITEM_SEQUENCENUMBER_DEPRECATED

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".
boolean	hasSequenceNumber(org.imixs.workflow.ItemCollection documentContext) This method verifies if a sequence number already exists.

Methods inherited from class java.lang.Object

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

Field Detail

ITEM_SEQUENCENUMBER

public static final String ITEM_SEQUENCENUMBER

See Also:

Constant Field Values

ITEM_SEQUENCENUMBER_DEPRECATED

public static final String ITEM_SEQUENCENUMBER_DEPRECATED

See Also:

Constant Field Values

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

hasSequenceNumber

public boolean hasSequenceNumber(org.imixs.workflow.ItemCollection documentContext)

This method verifies if a sequence number already exists.

The method also migrate the old item name 'numsequencenumber' into the new item name 'sequencenumber'

Parameters:

documentContext -