Universal Worklist Item - Add/Get Attachment

Question

Hi everybody,
i'm on NW 7.31 SPS06. I want to receive/push Attachments to/from an uwl item.
i have a process with several human tasks.
Receive Items:
I start my Process and the uwl item is created. I click on the uwl item and in the popup i add an attachment and close it (it is saved).
Now i will get the item with the uwl api:
Properties env = new Properties();
                              env.put(InitialContext.INITIAL_CONTEXT_FACTORY,
                                                  "com.sapportals.portal.prt.registry.PortalRegistryFactory");
                              // create initial context
                              InitialContext ctx = new InitialContext(env);
                              // retrieve UWL service
                              IUWLService uwlService = (IUWLService) ctx
                                                  .lookup("/broker/services/" + IUWLService.ALIAS_KEY);
                              // create context
                              UWLContext uwlContext = new UWLContext();
                              // Get the user for whom the items are to be retrieved.
                              uwlContext.setUser(WDClientUser.getLoggedInClientUser()
                                                  .getSAPUser());
                              uwlContext.setLocale(Locale.getDefault());
                              // begin session with timeout of 60 seconds
                              IUWLSession uwlSession = uwlService.beginSession(uwlContext, 60);
                              uwlContext.setSession(uwlSession);
                              IUWLItemManager itemManager = uwlService.getItemManager(uwlContext);
                              // get standard uwlView
                              UWLView uwlView = uwlService.getViewManager(uwlContext).getView(
                                                  "DefaultView", uwlContext);
                              // refresh the uwl cache and get the actual items (maybe a bit
                              // inperformant)
                              QueryResult result = itemManager.refreshCacheAndGetItems(
                                                  uwlContext, uwlView, null, null);
Item item = result.getItems().get(0);
Now the documentation says, that
item = itemManager.refreshAndGetItemByUwlId(uwlContext, item.getInternalId());
fills the attachment attributes. Unfortunately this is not the case.
Even
getAttachmentHeaders(UWLContext context, Item item)
and
populateAttachmentContent(UWLContext context, Item item, Attachment hollowAttachment)
doesn't do their job. Nothing returns.
Adding items
IPushChannel pushChannel = uwlService.getPushChannel();
                                                  IProviderConnector providerConnector = uwlService
                                                                      .getRegisterProviderConnector(IProviderConnector.BPEM_CONNECTOR_ID);
                                                  Attachment att = new Attachment(null, Attachment.TYPE_TEXT,
                                                                      "ExampleAttachment", "Example Attachment Descr.",
                                                                      "attachmentId", "Author", new Date(),
                                                                      PriorityEnum.NORMAL, "attachmentFile", "txt",
                                                                      "text/plain", 50);
                                                  Attachment[] attachments = { att };
                                                  createdItem.setAttachments(attachments);
                                                  pushChannel.updateItem(providerConnector, uwlContext, item);
Doesn't work. I think the main problem here is, the null attachmentConnectorId. No AttachmentProviderConnector is registered. Do i have to register/create one? Could this also the problem above, in "Receive Items"?
Thanks.
Best Regards,
Michael

Answer 1

Hi Michael,
I am facing a similar issue with adding attachments with the UWL API to an ad hoc workflow item.
I can successfully create and retrieve the the UWL item. However when adding an attachment, the attachment (including the attachment header) is always null when I try to retrieve it.
I think the reason the attachment is null is due to a missing attachment provider connector that has not been registered, but I am not sure how to do this.
Did you get this to work? Thanks,
Stefan