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GetNextWork functionality in pega

What is GetNextWork in pega? Pega provided a functionality to get the most urgent assignment(task) for user to work on. This is configured o...

Pega Keyed data page

Keyed page access in pega

Pre-loads the data from original data source and returns matching instances by using one or more keys.The keyed data page is the best implementation when there are frequent unique queries before the information becomes stale. Keyed data page configuration is only applicable to List type data pages and "Read-Only" mode.


We can configure the keyed page access by selecting check box.

When selected, we need to pass a key in the Pagelist keys section.Optionally we can select "Allow multiple pages per key" this allows each key to return multiple matching results. If not selected and have multiple matches key reruns the first matching page.
We have "+ Add key" option,is called "Multiple keys per data page" we can define multiple keys pega will return result(s) based on the matching of the specified keys.

How to reference keyed data page in pega?

Only properties can reference keyed data pages. Both property and data page should be in the same class context.
Please see RequestTypeTest page property, we have 3 options in Data access section.
  1.         Manual
  2.         Refer to a data page
  3.         Copy data from a data page
we can achieve keyed access configuration with "Refer to a data page" and "Copy data from a data page" options.

1.Refer to a data page:


A new data page will be created on the first reference of "RequestTypeTest" page property, data will not be stored in page property, but only contains reference to the data page.
Below is the clipboard structure how it looks:
Pega calls this reference pattern as System of Records (SoR). This pattern allows access to data which is stored in other system or application.Application always references the system of record, so the data is always current.Pega ensures, data accessed by application is always fresh and current.

Refresh strategy in SoR pattern:
Data page will reload as per the refresh strategy defined on the data page. Property always have the current version of refreshed data page's reference.Whenever  a data page parameter is updated, a new data page is created and property then points to the new page. 

2. Copy data from a data page

A new data page will be created on the first reference of "RequestTypeTest" page property and data will be copied to page property.Data will not be refreshed until the parameter value changed.
Please see the clipboard structure below:

Pega calls this as "Snap shot pattern" - system copies matched snap shot record from data page  to page property.
Refresh strategy Snapshot pattern:
Once we copy data from a data page, the data is stored in the page property. The data page is not accessed again until parameter changes. When the parameter changes, a new data page is created and effected data is copied to the property and overwrites the current data.

3. Manual - Reference pattern
We normally use this in UI controls to populate dynamic data on to drop down or auto populate controls.

Refresh strategy:

Data page reloads according to the refresh strategy specified on the data page, UI control always point to the new version of data page.




4 comments:

  1. The post is really good. Thanks for providing the detailed information.

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    Replies
    1. Thanks Naresh. Hope you will like other posts.

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  2. I wish there will be more posts coming up and Thanks for detailed explanation...

    Have small Query.. What is the difference between Keyed DataPage and Parameterized DataPage.... I think both will do the same thing..

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  3. This comment has been removed by the author.

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