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Oracle Application Express 4.0 with Ext JS by Mark Lancaster

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Chapter 8. Data Stores, AJAX-enabled Plug-ins, and Dynamic Actions

Data Stores provide the Ext JS framework with the ability to store data on the browser client acting much like an in-memory database. This provides enormous flexibility for data-aware components, such as the ComboBox, GridPanel, and TreePanel, as it logically separates the component from the data.

This makes the process of integrating AJAX functionality into plug-ins far simpler, because the AJAX processes will be focused on just passing data between the browser client and the database. The Ext components already contain the client-side functionality to update the display.

On the database side, APEX provides rich PL/SQL APIs to speed up the development of plug-ins. We will be making ...

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