UI5 Ressource Locking

hi folks,
i know this theme has been discussed but not really a outcome (for me ?). as s4/hana has a lot UI's with fiori i'm wondering what would be best practice to enqueue logical objects like:
Example Change customer:
User A views a customer master data via a sapgui transaction
User B edits via a FioriApp the master data of the customer of User A (as stateless the is i guess no lock on the logical object ?)
In the meantime user A switches to edit mode, changing data.(as not locked with enqeue he can switch, or will he get automatically not saved but edited data and how??)
Then User B saves changed data (should there be a call to the enqueue , and what then? as it is during a save-operation - error message to user, or reflecting with new data)
is there a built-in support for locking/sharing logical objects.
any idea what is the solution for such typical use-cases?
with sapgui or webdynpro or any stateful application , these are not really problems, but with stateless apps.
or do we have to handle conflice-documents and how (i hope not ?!)
best regards,
oliver

This is really good question and yes with SAP S/4 HANA delivering most of the UI in the form of Fiori based application, there will be need to support the scenario you mentioned with proper architecture.
earlier very good discussion happened in this thread how can i lock objects with an oData Service
combination of optimistic lock concept + push notification etc can solve the problem to certain extent.
But also if you see this picture [Reference - http://hana.sap.com/content/dam/website/saphana/en_us/S4%20HANA/Final_Launch_S4HANA_Plattner.pdf], I am not very much clear with the point highlighted which talks about No locking,parallelism for throughput.
Not sure if this to-be design will solve the problem statement.
Regards,
Chandra
Message was edited by: Chandrashekhar Mahajan

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CDancer a écrit:
Thanks, guys, but I don't think you have understood my problem. Read the first sentence - 2 completely independant VIs, and 2 or more ports...
I have written a program today using the globals option, which works very well. There should be a better way though.
Chris
ViLabWorks a écrit:
It isn't exactly clear to me why this is about one port. How much does one serial port cost versus programming time? Or even if it is about 4 serial ports the same applies. For me there is no question, doing something perhaps difficult versus spending next to nothing to solve the problem.
Well...
Sometimes you need to access the same equipement from different places in your application, or from different applications...
Usually I simply set/read a global "busy" boolean.
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Chilly Charly (aka CC)
E-List Master - Kudos glutton - Press the yellow button on the left...

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I am developing a business application using SAP UI5 and the NetWeaver Service Gateway in an embedded scenario. I have RFCs build for the backend interaction. As per my knowledge, each RFC is considered as a separate transaction and the user is logged on and off as the RFC is processed. This removes the lock on the object that I need to be sustained till the next RFC call. Unlocking the object exposes it to possible editing by other users which is not desirable.
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Hi Jacob
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Hello,
Attach to the post : http://forums.ni.com/t5/LabWindows-CVI/VISA-Shared-resources/m-p/1000856#M43685
I use LabWindows/CVI 2013 SP2.
I have a share VISA problem : 2 functions VISA (Read and Write), on the same ressource.
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Like they propose and also the "ThreadLockTimeout" NI example.
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If I use only the periodic VISA read function, no problem on lock/unlock.
N.B. : Lock function (step 2) take only # 100 µs (for case 2) : at the 1rst iteration).
N.B. : I use the same external lock/unlock functions for the VISA read/write.
But nearly at every VISA write asking (3 on 5), I can display 2 consecutive successfull locks function (VISA read and write) ???
N.B. : same time (100 µs).
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======================================
I try to improve the NI example to show my problem.
I hope that I do not make so much big mistakes, which would cancel the interest of this example.
Into this small code lines, I can reproduce my problem (by quick applies on F1 button).
I do not implimente all the fonctions I try.
Into a bigger one, it is very easy to reproduce (even with the other functions).
N.B. : In my final application, the thead n°1, look like more to a CVICALLBACK, than a thread with a while loop inside.
But the problem still the same.
Thanks a lot for consideration.
Certified LabWindows/CVI DEVELOPER (2004)
LabVIEW since 5.01 | LabWindows/CVI since 4.01
Attachments:
ThreadLockTimeout.7z ‏127 KB

Hello,
With NI France support, we improve to the NI example again.
We show, with adding timing, that the example can display the message in a wrong sense (with a software slowing down, at this moment, why ???) (see Explication°1.png).
If we display the message before the release (//#define M2), we can not reproduce the double lock (and release),
but also any software slowing down.
So this example can not be use to help me to resolve my application lock trouble.
It is not representative of my problem, which is always in progress.
Certified LabWindows/CVI DEVELOPER (2004)
LabVIEW since 5.01 | LabWindows/CVI since 4.01
Attachments:
ThreadLockTimeout n°2.7z ‏289 KB

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See the thread
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Phone (503) 620-3001
Fax (503) 620-6754
www.wavemetrics.com

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Message was edited by: MICHAEL CORDIEZ

Hi Michael, thank you for using our forum, my name is Johnnatan I am part of the Small business Support community. Thank you for all your specific detail about your issue, that was really clear to me, I will advise you install the last firmware 1.0.3.4, you can download it at link bellow:
http://software.cisco.com/download/release.html?mdfid=284152656&softwareid=282463166&release=1.0.1.10
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Greetings,
Johnnatan Rodriguez Miranda.
Cisco Network Support Engineer.
“Please rate useful posts so other users can benefit from it”
Greetings,
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