How to provide external assignments through directed Web access How to provide external assignments through directed Web accessDirected Web Access (DWA) allows anyone accessing the World Wide Web (or an intranet) and email to process an assignment, on a one-time or infrequent as-needed basis. This feature extends the scope and reach of your application to employees throughout the enterprise, trusted customers and suppliers, and anyone else you want to obtain information from.
Assignments define the parts of processing of a work item that requires human judgment, expertise, and data entry that are often completed by trained users of the application. Assignments sent to such outside parties are known as external assignments. They improve accountability, eliminate telephone calls, prevent the need for rework caused by answers from outsiders that don't pass edits, and give visibility to the responsiveness of these outside parties.
To list outstanding external assignments, select 
> Process and Rules > Tools > Work Admin > External Assignments.
To send the external assignment to someone, the application includes a specially formatted URL within the text of an email. When the email recipient clicks this URL, a Web browser session starts and automatically submits a once-only identifier and password B-18974 to your PRPC server.
After authenticating these values, PRPC sends an assignment to the user's browser. After a user completes and submits this form, the requestor connection ends. The external user cannot repeat the assignment or reuse the URL or password. pzSUS and pzTransactionID uniqueness
For security reasons, the URL for an external assignment must be static — not generated or altered by JavaScript or other processing at runtime. Because of this restriction, the flow action cannot use AJAX, dynamic select, or SmartPrompt, which require multiple server interactions.
External assignments are instances of the Assign-External class (or of a subclass). The standard activity Work-.External creates these assignments.
Complete these steps to support directed Web access in your application:
1. Create an Operator ID or IDs that start with the reserved word External. Include a password for the operator. Specify in the Operator ID form an access group, organization, and division that correctly provide the external operator with the ability to complete the external assignment and correctly identify the operator in history records. On the Advanced tab, set the License Type field to Invocation.
2. Select > System > Settings > URLs, and complete the Public Link URL field to create or update the Data-Admin-System-Settings rule named Pega-ProCom. PublicLinkURL to identify the URL of your system. For example,
http://mysystem/prweb/
Identify here the URL that is to be conveyed to external users; this may identify a proxy server. The standard function rule getPublicLinkURL(), referenced in the correspondence, accesses this Dynamic Systems Settings value.
3. Create a correspondence rule (Rule-Obj-Corr type). By convention, choose a Correspondence Name key for the correspondence rule that starts with the word "External". Choose Email as the Correspondence Type.
4. In the Stream Source field, use an include directive (not a JSP tag) to copy in the standard correspondence fragment named ExternalInstructions.Email at the point where the link is needed.
For example:
Dear {.pyCustomerName}:
{.pyNote Normal}
{INCLUDE FRAGMENT="ExternalInstructions" }
Our thanks.
{pyCorrPage.pySignature NORMAL }
5. Include the standard flow action EngageExternal (or another you have based on that one) as a local flow action in an assignment. When selected, this starts a flow execution of the standard flow Work-.EngageExternalQuick.
In the post-processing of the EngageExternalQuick flow, param.CorrName is hard-coded to ExternalRequestBrief. Therefore, if you want to allow the user to select a different correspondence rule, configure the flow action to lead to a shape that calls the EngageExternalForInformation flow.
Alternatively, customize EngageExternalQuick to take correspondence as a parameter. To use this method, you must perform a save-as and make a modification of three rules:
6. In the flow, right-click on the Create External Assignment shape and select View Properties. In the Assignment Properties form that appears, locate the OperatorModel field. Select the operator you created in step 1 as the Operator ID for the flow to use.
7. Test the flow. At runtime, the operator uses the EngageExternal flow action to identify the party (or email-addressee) to receive the email correspondence, enter a subject line, and message. Depending on your configuration, the operator can also select the correspondence rule.
The system creates the external assignment. Flow execution pauses until the external party completes the external assignment. The link in the external assignment does not require sign-on, but can only be used once.
If you want processing in the flow to continue without waiting for the external assignment to be completed, use a Spinoff shape in the flow to start the standard flow Work-.EngageExternalForInformation.
If the external user is only to supply text for a note, use the EnterInformationExternal flow action.
Ordinarily, each use of this facility counts as a Web invocation in the reports prepared by the License Compliance facility. To see a chart of period-by-period counts of Web invocations on your system, select> System > Tools > Usage Metrics > Web Invocations Chart.
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assignment, external assignment, perform |
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License Compliance facility — Reports and charts |
Process category