Designing Interactive Panels (Panel Services) › Retrieve Panels from Panel Libraries

Retrieve Panels from Panel Libraries

Panels are created using an online editor and are stored in a panel library. When a user is defined, the panel library, or sequence of panel libraries that they are to use, is defined. This is called the panel library path. When required, panel specifications are retrieved from a library in the user's current path.

To eliminate overheads associated with retrieving the panel from the library, an in-storage queue of active panels is maintained. When a panel is first referenced, it is retrieved from a panel library and stored on the active panel queue.

Thereafter, the panel is retrieved from the active panel queue without reference to the panels library. If one of these panels is modified (using the online editor), the old copy is removed from the active panel queue so that the next reference retrieves the updated panel from the panel library path.

Note: If a panels library is being shared by more than one system, the old version of a modified panel is only removed from the active panel queue of the system on which the panel change has been made. The other systems continue to use the old panel until it is rolled off the active panel queue by other panels being used in the system. The LIBRARY REFRESH command can be used to drop all panels loaded from a library from the active panel queue.

The SHOW PANELS command can be used to list the panels that are retained in the active panel queue.