Access to ResultList objects from Labview user interface

Hi!
I would like to have access to TS Locals.ResultList[] objects from user interface (LV) after test report is generated.
According to TS Help in this point I can get sequence context for the process model sequence file which posts UIMsg_ModelState_PostProcessingComplete message.
But objects of my interest are located in context of client sequence file.
Can I get access to Locals.ResultList objects with use provided model file context?
Are there another ways to get wanted data?
I have references to sequence file and execution in this point and tried to use Execution.RunTimeVariables property.
But could not get wanted data with any supposed lookup string from this object.
Thanks in advance for any ideas.
Solved!
Go to Solution.

The general idea is the following:
You have to keep in mind that Locals.ResultList on the model level (callstack) is simply the return value of a sequence call step (MainSequence). Therefore, you will only have this single entry [0].
To get access to the results of the steps inside you MainSequence (and any other sublevel in the callstack), you have to dig into this callstack using this "root-property":
Locals.ResultList[0].TS.SequenceCall.ResultList
hope this helps,
Norbert
[EDIT]: Since i have not stated it: The screenshot displays the UIMessageEvent callback function in a simple oi where the manager control is the Application Manager.
CEO: What exactly is stopping us from doing this?
Expert: Geometry
Marketing Manager: Just ignore it.

Similar Messages

Imlementing synchronized access to shared objects in LabVIEW OOP

Many objects in object-oriented programming have an
identity, such as a file, a front-panel object or a hardware device.
These objects cannot be modelled using present LabVOOP (LabVIEW Object Oriented Programming) objects as
LabVOOP objects gets copied as wire is branched; multiple different
wires cannot all represent a single object. This issue has been
irritating the community of LabVIEW users since the release of LabVOOP
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I'd like to start this thread to discuss these two issues.
Synhronization under the hood
Traditionally
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when accessing the object. Locking is traditionally done by acquiring a
mutex for an object, modifying the object and releasing the mutex so
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One way to get object-level synchronization is modify the
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implemented in programming languages like O'Haskell, which is a Haskell
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Also different
transactional mechanisms[1,2] have been successful. In transactional
mechanisms multiple threads are allowed to access a synchronized object
simultaneously. As each method accessing an object commits their
changes, they verify that no other object has modified the object
simultaneously in a manner than would break the transaction. If such a
modification has occurred, everything is rolled back. Transactional
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be rolled back. For example it's hard to roll back an action that
somehow modifies the physical world.
User experience of synchronization
How
the synchronization is generally implemented in LabVIEW shouldn't be
directly visible to the developer end-user. The developer should
understand the general concepts of synchronization to take full
advantage of it, but in general the synhronization mechanism should be
integrated directly to development environment. There should in general
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the end-user should be able to specify which data needs synhronized
access in more sophisticated way.
In the following I propose a
mechanism of integrating the synchronized access of by-ref objects to
the development environemnt of LabVIEW. The proposal is very
preliminary but I hope it breaks the ice and the community would start
innovating in how should NI implement the syncrhonization support in
the user interface of LabVIEW.
Wire level synchronization
Only
methods can access object private data members. In synchronized access
to the object, it's the methods accessing the private data members that
need to be synchronized. The private data members are accessed by
applying unbundle node to the class wire and data is written back to
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An unbundle node could either be normal or "synchronized". A
synchronized unbundle would guarantee the access to the private data
members in synchronized manner. All data wires originating from
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synchronization requirement is released.
These synchronized
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type. The developer could easily select which wire would be
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as a combination of a data and a mutex, even though mutexes don't need
to be the underlying synchronization method. The wire just guarantees
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access to the wire data is synchronized.
There is a need to wire
data originating from a non-synchronized wire to a synchronized wire so
that it can replace the private data member of the class. This is
accomplished with a new node similar to bundle node, that would allow
replacing the data in a syncrhonized wire with some data originating
from a non-synchronized wire.
The synchronized wire can be
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way the synchronized wire can originate from a method and allow passing
the synchronized data to the calling VI and back to another method.
This is practical for example in a situation when the developer wants
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the existing data analysis tools as class members. So the developers
writes a syncrhonization acquiring getData method that let's the
calling VI to access the syncrhonized data. Then the developer passes
this data to an analysis VI and passes the result back to a setData
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There
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the programming model for all nodes that do not support such
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non-synchronized wire branch to the node and then bundling the result
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To increase performance and
decrease unnecessary buffer copies when a syncrhonized wire is
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Discussion
The
syncrhonized access to a by-ref LabVOOP objects can be implemented in
multiple ways by National Instruments. The synchronized access should
be divided to two different and independent parts: 1) the user
experience of synchronization and 2) the runtime engine synchronization
mechanisms. As LabVOOP objects have special properties compared to
other LabVIEW data types, optimal user experience can be gained by
designing the user experience specifically for LabVOOP objects. From
user experience point-of-view this syncrhonization mechanism may not
work for other data types. Separating object syncrhonization from
synchronization of other data types is advantageous also for other
reasons. Due to the fact that object data can only be accessed via
object methods, more advanced synchronization methods may be used with
objects than can be used with other data types. O'Haskell
synchronization implementation is an example of this. Integrating the
synchronization directly to the user interface allows NI to change the
mehcanisms under the hood, when computer science comes up with more
advanced methods. Therefore NI could begin with traditional and quite
easy mutex-based synchronization and later move to more advanced
perhaps transaction based syncrhonization methods or even combinations
of multiple different methods.
I hope this topic generates
discussion that would help NI to implement an excellent synchronization
mechanism in LabVOOP. I hope that all talented individuals in the
community participate this discussion to help NI to reach this goal. I
also hope that if you just have time, it would be great if you could
surf the computer science resources to find out what kinds of new
techniques there exists for synchronizing access to shared resources. A
Large community may find much more innovative solutions than a few engineers at NI. Let's give NI the power of open source design
Tomi Maila

Hello Tomi,
First, thank you for taking the time to write such a well
though-out suggestion. Are you familiar
with the “LabVIEW Object-Oriented Programming: The Decisions Behind the Design”
document? I think the reason we chose to implement a ‘by
value’ strategy, is that is more in line with the LabVIEW programming paradigm
of dataflow, and would make sense to most of our LabVIEW users.
I think your suggestion is interesting, and it does
highlight the need to think outside of the conventional LabVIEW box and look to
some of the innovative things other languages do. However, I think we all agree that
synchronization takes careful planning and extra work for the programmer. Even with an ‘ideal’ solution I see no way
around this. For LabVIEW users today,
one great way to get synchronized ‘by reference’ semantics with your objects is
to use a single-element queue to pass your object. The queue itself is passed ‘by reference’ and
is inherently synchronized! The does
have the disadvantage of adding one more small layer of complexity to your
program, but some complexity would have to be introduced in any situation. The other disadvantage with this is that it
is not always an intuitive way to implement your program and requires some
amount of LabVIEW knowledge before one would generally come across this
technique.
In any case, I appreciate the time and effort you put in to
your suggestion. Please make sure that
you submit the suggestion formally through the NI Product Suggestion Center so
that it can be reviewed by some of the decision makers here.
Thanks again,
Travis M
LabVIEW R&D
National Instruments

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Solved!
Go to Solution.

I'm not surprised that what you are doing doesn't work. The Start Execution UI Message is triggered when the user clicks a button to start an execution. Realize that most executions go through a process model. So you could be looking at the sequence context of the process model and not your client sequence file.
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Hii Experts.... I have a problem here. Please give me solution for this...
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Edited by: user3868150 on Nov 6, 2009 6:05 PM

When performing an update in their system, the same script will be run with different values, thats not the problem.
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{code}
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Edited by: user3868150 on Nov 6, 2009 6:10 PM

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Solved!
Go to Solution.

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Solved!
Go to Solution.

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FrontEndCallbacks.seq ‏5 KB

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holger

I think it might have something to do with htmldb_Get
Hope that clue gets you somewhere. I would love to see a working example of this for 4.02 if anyone actually has one.
Regarding dynamic actions there's a severe limit on the number of them I believe.29? Which is one reason I avoid them and
just do things in javascript. Personally I think javascript is actually easier to understand because one does not have to
divide an actiivity up into several pieces. But that might just be specific to my brain, I don't know.

Access to ResultList objects from Labview user interface

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