Where does ExtJS's store keeps all the data

Question

I want to know where does ExtJS store keeps all the data? I know the data is stored in the memory but I want to know does it used HTML 5 local storage internally or if any other technique is employed?

Thanks, Deepesh

Answer 1

It depends.

In every case, the data of the store is stored in a Javascript object. The store persists its data via a proxy. It is a matter of configuration how this data is stored. You can configure different types of proxies:

Client side storage

• LocalStorageProxy - saves its data to localStorage if the browser supports it
• SessionStorageProxy - saves its data to sessionStorage if the browsers supports it
• MemoryProxy - holds data in memory only, any data is lost when the page is refreshed

Server side storage

• Ajax - sends requests to a server on the same domain
• JsonP - uses JSON-P to send requests to a server on a different domain
• Rest - uses RESTful HTTP methods (GET/PUT/POST/DELETE) to communicate with server
• Direct - uses Ext.direct.Manager to send requests

More details are in the docs.

Answer 2

The data is stored in an in memory collection called a MixedCollection. It's an ordered collection, but it also allows you to look up data by key, so it's like having an ordered hashmap.