Progress
Version 9
Product Update Bulletin


HANDLER Attribute

A handle to the procedure containing the SAX callbacks.

Data Type: HANDLE

Access: Readable/Writable

Applies To: SAX-READER Object

The default is a handle to the procedure that contains the SAX-PARSE(), or the SAX-PARSE-FIRST() and the SAX-PARSE-NEXT().

When SAX-PARSE(), SAX-PARSE-FIRST(), or SAX-PARSE-NEXT() executes, the SAX-READER object looks for callbacks only in the procedure whose handle is stored in HANDLER. HANDLER must be a valid procedure handle and cannot be a proxy.

NOTE: It is permissible for both the driver procedure (the procedure containing the SAX-PARSE(), or the SAX-PARSE-FIRST() and SAX-PARSE-NEXT()) and handler procedure of a SAX application to reside on a remote AppServer. If this occurs, callbacks are invoked local to the AppServer.

Callbacks can reside within a special handler procedure file that is run persistently or within the driver procedure, which is the procedure that contains the SAX-PARSE(), or the SAX-PARSE-FIRST() and SAX-PARSE-NEXT().

Within a procedure file, to get a handle to the procedure file, use the THIS-PROCEDURE handle. The following fragment assigns HANDLER a handle to the current procedure:

hSaxReader:HANDLER = THIS-PROCEDURE. 


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