Progress
Version 9
Product Update Bulletin


IN-HANDLE Attribute

A handle to one of the following:

Data Type: HANDLE

Access: Readable/Writable

Applies To: CALL Object

SYNTAX

IN-HANDLE [ = { handle-expression | char-expression } ] 

handle-expression

A HANDLE expression. Table D–6 explains what the handle can indicate and who sets it.

Table D–6: What IN-HANDLE Indicates and Who Sets It
If the Handle Indicates...
It Is Set By...
A persistent procedure you just started up dynamically
The INVOKE() method
An already-running persistent procedure containing logic (in the form of internal procedures and user-defined functions) you want to invoke dynamically
You
An object whose attributes you want to get or set dynamically
You

char-expression

A CHARACTER expression indicating the name of a system object, such as “SESSION” or “FILE-INFO.”

The default is ? (the unknown value).

When you use IN-HANDLE to call an internal procedure, IN-HANDLE affects INVOKE() the same way the IN proc-handle phrase affects the RUN statement. Similarly, when you use IN-HANDLE to call a user-defined function, it affects INVOKE() the same way the IN proc-handle phrase affects the DYNAMIC-FUNCTION function. In both cases, IN-HANDLE specifies the instance of the external procedure that contains the internal procedure or user-defined function.

When IN-HANDLE is used to get or set an attribute or to invoke a method, it represents a handle to the object the attribute applies to. If the attribute applies to a system object such as the SESSION handle or the FILE-INFO handle, IN-HANDLE can be set to a character string such as “SESSION” or “FILE-INFO” that indicates the name of the system object.

NOTE: When you create a running persistent procedure by running an external procedure persistently, you can do this statically or dynamically. Similarly, you can run any of the persistent procedure’s internal procedures and user-defined functions statically or dynamically.

For information on dynamically invoking logic that resides on a Progress AppServer, see the SERVER Attribute reference entry in this bulletin.


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