EMA C++: will the 'handle' long value be reused?

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Frederic
Frederic LSEG
in EMA

For an EMA C++ application, will the 'handle' long value be reused?

What's the rules of the 'handle' long value assigned to a single RIC stream or batch stream? e.g., unique and auto-incremented integer?

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  • Jirapongse
    Jirapongse ✭✭✭✭✭
    Answer ✓

    @Frederic

    In EMA C++, the handle is a memory address of an internal object. The object is allocated when the application calls the register method, and then EMA returns the address of the object to the application. The object is de-allocated when the application called the un-register method. The de-allocated memory can be reused by the process.

    I found the following statement in the EMA C++ developer guide.

    The Enterprise Message API assigns all opened items or instruments a unique numeric identifier (e.g. UInt64), called a handle, which is returned by the OmmConsumer::registerClient() call. A handle is valid as long as its associated item stays open. Holding onto these handles is important only to applications that want to modify or close particular items, or use the items’ streams for sending PostMsg or GenericMsg messages to the connected server. Applications that just open and watch several items until they exit do not need to store item handles.



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