Limit concurrent users of a WDA application

[guillaume-hrc]

Hi,

Is there a standard mechanism so as to limit the number of concurrent users in a WDA application?

Would it make sense to use some locks to track down the current number of users?

Thanks in advance for sharing your experience and ideas!

Best regards,

Guillaume

[Former Member · Accepted solution]

Hi Guillaume,

I'm not aware of any standard functionality in the ABAP stack to deliver this sort of functionality, however I have seen a number of discussions on SDN over the years about it and have been involved in developing similar solutions in various SAP technologies also.

My advice would be to create a small package containing a few objects to enable this functionality for any and all applications, instead of just using lock objects specific to your one WDA application.  You could create a config table to map a given object to it's concurrency limit, such as ZABAP_PROGRAM_1 - 10 users.  Then use a further transient table to store a current count of users against each object.  You then need a small number of function modules that handle querying these tables and updating the concurrency table.  Enable them as RFC and you have a reusable package that can be used inside and outside the ABAP stack.

You will have to consider what happens if a user's session is lost, or they kill a remote application in an incorrect manner and hence their entry remains on the concurrency table, however this is no different to an orphaned lock entry in practice.

Hope this is a useful starter.

Gareth.