Getting user name of person logged into workspace in BPM 11g.

Question

What API and method calls can we use to determine who is logged into BPM 11g? Since many people can be assigned a role or human task (using dynamic task assignments) how can we determine who the actual user is?
The use case is a user logs into the workspace and executes human tasks assigned to him/her. In the ADF UI, we are using database controls to view, update and create records in database associated with this task. The tables have audit information like, LAST_MODIFIED_BY and MODIFIED_DATE. These fields or columns need to be updated with the user ID and current system date when data changes in the tables.
The problem is that I know how to get the user who the task is assigned to, but if the user is a delegate or process owner, how do we know? Also if many people are assigned to the human task, how do we find which one is actually working on the human task? In other words the current logged in user?
In the ADF task flow, I have access to an object SystemAttributesType that contains a lot of useful information, like the list of assignees. The problem is it doesn't seem to give me information about who is actually working on it (logged in user). Here's a code snippet for how I got this object. It is a method in a managed bean associated with the task flow.
public List getAssignees() throws IOException {
FacesContext context = FacesContext.getCurrentInstance();
String ctx = (String) context.getApplication().evaluateExpressionGet(context,
"#{pageFlowScope.bpmWorklistContext}", String.class);
String tskId = (String)context.getApplication().evaluateExpressionGet(context,
"#{pageFlowScope.bpmWorklistTaskId}", String.class);
IWorkflowServiceClient workflowSvcClient = WorkflowService.getWorkflowServiceClient();
ITaskQueryService wfQueryService = workflowSvcClient.getTaskQueryService();
IWorkflowContext wfContext;
List assignees= "";
try {
wfContext = wfQueryService.getWorkflowContext(ctx);
Task myTask = wfQueryService.getTaskDetailsById(wfContext, tskId);
Element xmlPayload = (Element) myTask.getPayloadAsElement();
SystemAttributesType systemAttributes = myTask.getSystemAttributes();
assignees = systemAttributes.getAssignees();
return aissignees;
Thanks in advance for your help.

Answer 1

Hi.
Plz find the link below, it might hep you.
11g how to get participant information
Bibhu