Miscellaneous Topics

 

Pega Class related facts

https://www.youtube.com/watch?v=hA7lTYaDroQ&ab_channel=TechRidewithPK

 

Concrete vs Abstract classes

 

What is a class group?

As the name suggests it’s a group of classes. There may be multiple work classes inherited from Org-App-Work class such as Org-App-Work-ABC and Org-App-Work-XYZ.

There are 3 options to select from in the drop down

·        Belongs to a class group – Will be mapped to an existing parent class. For example, Org-App-Work-ABC class can be mapped to Org-App-Work class group.

 

·        Is a class group – If we select this option a new class group instance will be created in the name of the particular class. Which can be viewed from the records > Sysadmin > Class Group. Use this option if there is a large number of class instances created for the particular case time.

 

·        Does not belong to a class group – Usually this option is selected for data classes so that we can have a dedicated table. But we cannot select this option for Work classes.

 (Make sure you define key in the class group)

Test Connection

 

We find the mapped database table in the Records > SysAdmiin > Database Table

 

 External Mapping

We don’t need to explicitly map properties in the external mapping table. If the property name does not change PRPC will automatically map the columns in the table. This mapping will automatically be handled by PRPC when property optimization is done for a page property, where additional property will be made in the class and will be assigned to it.

 

How to map a class to a different database table?

1.     1. Create a database table from sql

2.     2.    Create menu > SysAdmin > database table à Provide the class        name for both the fields and create and open.

3.     3. Specify the Table name and save

4.     4.  Save the class instance

 

 

Obj- Refresh-And-Lock method

https://pegalearnings.blogspot.com/2019/06/obj-refresh-and-lock-method-in-pega.html?sc=1679545569985#c4148323625021409945

summary

Obj-Open method can be executed with or without acquiring lock. For example, if we just want to read the record we can open the object without acquiring a lock.

But if we want to Update the record we must acquire the lock. Here, the WO we are trying to acquire the lock may be already acquired by someone else. In this case if we just use the Obj-Open method with lock option checked it will fail the step as the lock cannot be acquired.

Here is where the Obj-Refresh-And-Lock method comes into picture. As a solution to this problem we can,

1.      Open the object using the Obj-Open method without acquiring the       lock

2.      Call Obj-Refresh-And-Lock method and acquire lock (This method       will not do anything if the lock is already acquired)

3.      Do the necessary changes to the opened page

4.      Commit the page

Note that some of the steps are commented in the above screenshot. This is only to refer the methods used in the explanation.

Important considerations

·        Obj-Refresh-And-Lock method has a check box “ReleaseOnCommit” which has to be checked. Otherwise lock will be there forever. And make sure to commit after using this method.

·        We can view the records of instances which are locked using the class instances of System-Locks.

·        If we want to explicitly release the lock that has been acquired we can call the method Page-Unlock

·        When tracing the locks make sure to enable “Locking” check box in the tracer

 

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Forward Chaining and Backward Chaining

 

This concept is used in Declare Expressions

A+B = C

We can configure the DE to execute in two different ways in the Change Tracking tab

1.      Whenever the input value changes – Forward Chaining

2.      Whenever Used – Backward Chaining

Assignment | Worklist | Workbasket | Routing

 

Assignment is an instance of a class derived from Assign- base class. Assignments record a temporary condition of an open work object within an executing flow. In laymen terms Assignment is a Task.

Assignments are created by a flow operating on work object, but assignments are not themselves part of the work object. The system save data recording an assignment in instances of the Assign-Workbasket (pc_assign_workbasket) or Assign-Worklist (pc_assign_worklist)

(When an operator submits the assignment FinishAssignment activity will be executed)

 

Important properties of the Assign-Worklist/ Assign-Workbasket classes

1.     pxRefObjectKey (Key) – This property keeps the mapping to the             corresponding WO of the Assignment. i.e. pxRefObjectKey =             pzInsKey of the WO

 

2.        pxFlowName (Key)

 

3.       pxAssignedOperatorID

 

Where can you find the Assignment information in the clipboard?

newAssignPage – which comes under user pages

 

How to configure the UI when there is a delay in data loading? – Defer Load Content

 

This can be configured for dynamic layouts, repeating layouts, Table layouts or dropdowns

Enabling this will introduce a delay in loading or wait for user intervention like scrolling/ hovering to load data to the portal/ harness

This can be combined with pagination for more optimal performance.

Check in the General and Presentation tabs for the configurations

 

Access Control Mechanism

• 1.      Role Based Access Control
•      Attribute Based Access Control

 

Attribute Based Access Control

It provides more granular control on application more on security perspective

Example

I want to show all cases of my class to all users – use RBAC

Now if I want to hide few properties or mask few properties we use ABAC

 

Two rules we implement

• Access control policy
• Access control policy condition/ Access When

 

Actions

 

·        Read – user can open a case that meets policy conditions or view data for cases in the lists/reports or so on

·        Update – User can create case that meets policy conditions or update data for such a case

·        Delete – User can delete a case that meets policy conditioins

·        Discover – Can see limited information about a case that doesn’t meet read conditions but does satisfy discover policy conditions.

·        Property Read – User has restricted visibility to property values including property values with read and update access.

·        Property Encrypt – Property is encrypted in database, clipboard, logs and indexes if no property read policy obfuscates the property, the decrypted value is visible to user UI control

 

 

Enforcement Exceptions

1.      Can only be defined on instances of Assign- , Data-, Work- classes

2.      ACP defined on Data- are not enforced in search queries

3.      Only read policies are enforced in custom SQL

Prerequisites

pzCanManageSecurityPolicies previllege should be available.

We must checkIn the rule to apply the changes

 

 

 

MaskIdentity is Access Policy Condition in which there are when conditions to evaluate. In the property section define the properties along with what needs to be done.