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Enabling Delta Pull MechanismLocate this document in the navigation structure

Use

Delta Pull mechanism of UWL enables new, modified and deleted items to be fetched from the back-end systems at regular time interval, by default every 60 seconds.

Once items are retrieved, they are updated in the UWL cache.

Workitems are fetched when the UWL session begins and stop to be fetched when the user logs off or their session expires.

You can enable Delta Pull for those connectors that support it. WebFlowConnector and BPMUWLConnector support delta pull. Custom connectors can also support delta pull.

Controlling the Delta Pull Mechanism from UWL

From the steps listed below you can enable / disable and specify the time interval between invocations.

  1. Launch the UWL configuration screen.

    You can access the UWL administration pages from Portal Start of the navigation path System Administration Next navigation step System Configuration Next navigation step Universal Worklist and Workflow End of the navigation path.

  2. Navigate to the property editor as follows:

    From the Universal Worklist Systems choose the system for which you want to edit the properties.

  3. Choose Edit.
  4. See the table below for description of parameters related to the delta pull properties and set as needed.

    Property

    Description

    Delta Pull Channel Refresh Period (in Seconds)

    This is the period at which workitems are fetched from back end to UWL cache. Default: 60 seconds.

    No delta pull calls take place if you leave the field empty or enter a negative number.

    Delta Pull Channel Snapshot Refresh Period (in Minutes)

    This property is obsolete. Do not use.
  5. Choose Save to save your changes.
Setup necessary from Business Workflow to Enable Delta Pull Mechanism

Some configuration settings are required if you use the UWL and the Extended Notifications for SAP Business Workflow.

Define the following two batch jobs:

  1. Background job (for example UWL_DELTA_PULL_1 ), consisting of a single step of ABAP report RSWNUWLSEL in FULL mode, using a report variant.

    Run the job once a day.

  2. A background job (for example UWL_DELTA_PULL_2 ), consisting of a single step of ABAP report RSWNUWLSEL in DELTA mode (default mode is delta, so report variant is optional).

    Run the job every one to three minutes (depending on the performance of the back end SAP system).

Note

No additional back end configuration is required to enable Delta Pull Mechanism for alerts.