Automatic data persistence

Sample description

The CXP infrastructure contains a feature which is called entity storage. This feature provides you with a persistent storage for any data you want to associate with either the current session or your application or the current page. The CXP infrastructure automatically takes care of persisting your data, and making it available to your application in the context requested.

Session management

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Live editor

<%
 //
 // The ::Data collection stores variables associated
 // with the current page. Read or write values by
 // accessing ::Data:(your variable). An examples for
 // implementing a page counter using page data is
 // shown below.
 //
 // The session object maintains variables associated
 // with the current session. Values can be read or
 // written by accessing ::Session:(your variable).
 // Session data is valid only for a single user/client
 // agent.
 // Example:
 //  ::Session:User := "Bolger"
 //
 // Application-specific data can be read or written
 // by accessing ::Application:Data:(your variable).
 // This kind of variable is visible to all pages in
 // your CXP application.
 // Example:
 //  ::Application:Data:TotalRequestCount += 1
 //
 // Assigning a value to a variable creates the
 // variable, if it doesn't exist. Assigning NIL to
 // a variable removes the variable from the
 // collection.
 //

// Increase the page access counter each
 // time the page is executed
 IF(ValType(::Data:Counter)=="N")
   ::Data:Counter++
 ELSE
   ::Data:Counter := 1
 ENDIF

? Var2Char(::Data:Counter)
%>

                    Result
                    built with V2 2156
                

Automatic data persistence

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