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Chapter number In a web browser, generally speaking, objects persist for the life of a page. They will be destroyed when the page is discarded or refreshed. Session storage can be accomplished effectively by maintaining a frame set where the outermost frame remains available throughout the session even though the pages it contains are replaced several times. In a server-side environment, objects and entities will likely only persist during the request-response loop. Items may persist longer if the server-side implementation is able to archive them or if it is able to maintain session state information between one request and another. In a TV set-top box environment, objects may persist for some time, perhaps for the duration of a broadcast program or for as long as the TV set-top box is tuned to a particular channel. Changing channels may purge out the object store. This particular kind of implementation is under constant and rapid development. One of the major areas of research is that of persistent and browsable cache systems where objects may repose and be recalled at will. In a system like that, objects may persist forever, or until the user chooses to dispose of them explicitly. See also: Identifier, Request-response loop, Scope chain, Script execution, Script termination Stproc object (Object/NES) An object that encapsulates a call to a stored procedure on a database from a Netscape Enterprise Server. close(), outParamCount(), outParameters(), resultSet(), Netscape Enterprise Server version 3.0 JavaScript syntax: The name of a stored procedure to call Argument list: aProcParm A parameter value to pass to the stored procedure Object properties: Object methods: returnValue() This object provides a container to manage the call to the stored procedure and somewhere that the results can be made available for further processing by your scripts. You create Stproc objects by requesting them from the database or connection objects that are accessing the target database you are interested in. Example code: Availability: JavaScript 1.2 NES myStproc = database.storedProc(aProcName, aProcParm); myStproc = myConnection.storedProc(aProcName, aProcParm) aProcName NES prototype // An example derived from Wrox Professional JavaScript database.connect(”ODBC”, “myDatabase”, “me”, “myPassword”, “”); myStproc = database.storedProc(”myProcedure”, 40); 1946
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