Performance of the property as accessors for class nodes

LV2013

I vaguely remember reading somewhere that property nodes require a context LV switch because they must be run on the UI thread.

  • Is this always true?

  • Is true even if the node are not related to a user control (e.g., an accessor for a field of private data in a class)?

  • How much of a penalty that is? Everyone has ever measured it?

  • It is convenient to use a node property with terminals 2 + to access the fields 2 +.  Is - this comfort outweighs the drop in performance?

  • Are there any books or other documents explaining all this?

Thank you

CoastalMaineBird wrote:

I vaguely remember reading somewhere that property nodes require a context LV switch because they must be run on the UI thread.

That's only true property nodes that run in the user interface thread, such as those that refer to elements of façade. Executing an accessor LVOOP via a property node is just syntactic around a standard call from VI and don't force a switching of threads. I remember reading that there is a slight difference in this read accessors run always in the order due to management errors, but I can't find this post in a quick search.

Tags: NI Software

Similar Questions

  • AdvancedDataGrid: displays the icon of disclosure for empty nodes

    Hello

    I have an AdvancedDataGrid with HierarchicalData which will be loaded lazily. Initially, the tree displays only the parent nodes. As children nodes are not yet loaded, no disclosure icon is returned. Is there a way to force the tree to also make the icon of disclosure for empty nodes, so that I can load the children of a node when it is expanded?

    I tried to look TreeDataDescriptors, but AdvancedDataGrid or HierarchicalData do not seem to support this.

    I also looked on included AdvancedDataGridGroupItemRenderer, but do not see where I can put logic to make the disclosure icon.

    Any help would be appreciated.

    Glenn

    Create your own HierarchicalData (or extend the existing) and implement the canHaveChildren() method.

    -Sameer

  • Setting the property model length for Dashed/DottedStrokeStyle [JS CS4]

    I tried to create a custom stroke style. There is a property in the interface called length of model that does not have a counterpart in the InDesign CS4 (6.0) Object Model (DashedStrokeStyle entry):

    Style created in InDesign:

    My code. First part to try to read the properties of a style and see what InDesign uses (I know it is dotted vs annihilated, but the properties of both types follow the same paradigm). Second part to create a custom style:

    var thisDoc = app.activeDocument;
    Thispage var = thisDoc.pages [0];

    Reading an existing style:
    //
    var thisPremadeStrokeStyle = thisDoc.dottedStrokeStyles.item ("Crazy Dots");

    $.writeln (thisPremadeStrokeStyle);
    outputs: solve ("/ document [@name = \"test strokes.indd\"]/")

    $.writeln (thisPremadeStrokeStyle.toSource ());
    (' [' output: dotted-stroke-style[@name=\"Crazy Dots\"] ')

    $.writeln (thisPremadeStrokeStyle.getElements ());
    Poster: [object DottedStrokeStyle]

    $.writeln (thisPremadeStrokeStyle.getElements (.properties));
    outputs: undefined

    A new style of edge entry
    //
    thisDoc.dashedStrokeStyles.add ({name: "Crazy dash"});
    var thisNewStrokeStyle = thisDoc.dashedStrokeStyles.item ("Crazy dashes");

    thisNewStrokeStyle.patternLength = "0.5i";
    Object does not support property or method 'patternLength.
    //
    thisNewStrokeStyle.length = "0.5i";
    Object does not support the property or method 'length '.
    //
    thisNewStrokeStyledonut = "0.5i";
    Object does not support property or method 'range '.
    //
    // ???
    //
    thisNewStrokeStyle.dashArray = [0,0.0625, 0.125,0.125, 0.375,0.125];
    thisNewStrokeStyle.strokeCornerAdjustment = StrokeCornerAdjustment.DASHES_AND_GAPS;

    Style created by the above code:

    The document I want to do is entirely programmatically. I'm ready to first create styles in InDesign, export to a file StrokeStyles and import back into a document created programmatically (Although there are problems with this approach), but wanted to see if there was an alternative, first.

    It may just be a coincidence that your 0,0625 + 0.125 + 0.125 + 0.375 + 0.125 equals 0,8125?

    I think, if you enter these values in the UI, then replace 0,1825 by its double 0.3625 value, you will see your individual table values will double as well.

  • OK the property button (LV7.1) cluster node

    Hi people,

    I already found a solution to my problem, but I was wondering if someone could put a logic to it.  I created a group of Boolean values with buttons OK because I wanted to use custom text labels, etc.  When I unbundle the cluster, I get the Boolean desired.  However, when I created a property node, the value was the variant - makes no sense to me.  If I wire the property node to a conversion of the VI Variant (with the Boolean type), the output of the property node suddenly becomes Boolean and stays that way when I remove the conversion VI - makes even less sense.

    Why OK buttons are somewhat different from other Boolean when used in a cluster?

    The fix that I went was to create a bunch of LEDs square with text, turned in the controls and then put them in a cluster.

    Michael Tracy

    Synergy microwave

    The property node was a variant because the 'OK' button is a type of lock. You shouldn't read/write locking type buttons programmatically, because a race condition is inevitable. Your question didn't concern the cluster.

  • "Argument mismatch in the property or function argument" on nodes.length

    Hello

    But I try to get on the nodes property length, I always get this error:

    "Inadequacy of argument in the property or function argument.

    It happens regardless of what level of the DOM/SOM I try, even if I can solve the nodes, values, etc..

    Here is an example that would lift the error:

        var objDataGroup = xfa.resolveNode("$data");

    xfa.host.messageBox (objDataGroup.nodes.length);

    What I am doing wrong?

    Thank you!

    Have you tried the below...

    Try the resolveNode on $record instead of $data.

    var objDataGroup = xfa.resolveNode ("$record");

    xfa.host.messageBox ("" + objDataGroup.nodes.length);

    Thank you

    Srini

    Post edited by: Srini Dhulipalla

  • Confused about the use of accessors with classes.

    With a new assignment thought, it would be appropriate to increase the use of labview OO features. In my case, I'm trying to use a class to contain a bunch of different calculations. The calculations require multiple entries to finish so I built a control to take care of these data. My plan was to build separate methods for each calculation. This will allow to easily add new calculations and considering that many calculations depend on preliminary calculations seem to be an excellent opportunity to learn a new part of labview.

    My problem is to find an elegant way to complete this great control; I believe that I must write accessor vi to allow outside access to the objects. I don't know if there should be one vi for EACH parameter accessor, or if I can access these items in a cluster.

    I can only relate to the use of get / set in .NET and usually I would write one for each variable that I have access to. I'm not sure how to proceed in LabView. Any ideas would be great.

    I enclose a few images. One showing just a sumple calculation and one of my ctl. Still, my main question is what is the best way to populate the items in this list.

    -Chris

    Since there is no such thing in LVOOP as public members of class (and thank God / NOR) you must always provide accessors (getters/setters) to join the data members of the class outside of the classroom.

    Inside the method of class VI, there is no need for them since you can reach directly from the wire with bundle/unbundle (like photos).

    I've implemented a similar class that performs calculations and I chose to use the recursive calls to deal with the problem of some variables must be calculated before the others.

    I'm a member of the VI class called GetCalculatedVariable.vi which takes the name of the variable to calculate input (like typedefed enum).
    Inside of this VI have a structure dealing with a box for each variable that can be calculated.

    The inside of the box, I define the calculation, and if I ever need another variable, I here call GetCalculatedVariable.vi recursively.

    In addition, I also have a CalcBuffer so I don't have to call GetCalculatedVariable.vi more than once for each variable.

    The class also has a GetMeasuredVariable.vi which also uses the recursion in the same way, but works on my measurement files instead.

    The advantage is that my application code gets very clean because it contains only a single Subvi callto obtain and use any calculated variable.

    I also have a GetCalculatedVariables that takes an VariableNames array and returns an array of values.

    I hope this helps...

  • Read the property unit daqmx for a task

    Looking for a way to read the channel units in a task. Now the only way I know to do is actually read data and query data. In this case I don't want to do it this way, I'm looking to read the task units. I have applied custom scales so I know which complicates things.

    Thank you

    What is then?  You just need to dig up the names of the scale.

  • Cannot run business ruleset using the Launcher command line for the calculation Manager

    Hello

    I use the Hyperion 11.1.2.2 planning version. I am trying to execute a business rule defined via the calc Manager command line utility. Please see the order form below,

    D:\Oracle\Middleware\user_projects\epmsystem1\Planning\planning1 > CalcMgrCmdLineLauncher.cmd /U:HBRadmin D:Capex /A:CORP S:Capex_Nightly

    At the launch of the above command, the utility starts and ends without triggering the rule in the database. See log info below,

    Local planning: en_US

    using java.library.path: D:\Oracle\Middleware\EPMSystem11R1/products/Planning/lib64

    EPM_ORACLE_HOME (D:\Oracle\Middleware\EPMSystem11R1) has the value of the property 'EPM_ORACLE_HOME' of the JVM.

    using the property of Java for Hyperion home D:\Oracle\Middleware\EPMSystem11R1

    For the non - RFP app, ask size is not necessary

    EPM_ORACLE_INSTANCE (D:\oracle\Middleware\user_projects\epmsystem1) has the value of the [EPM_ORACLE_INSTANCE] property of the JVM.

    Support RTC Essbase Version: 0xb1221

    null

    But if I try to execute a business rule with the calc Manager command-line utility, it works well. It is only rules base which poses problem. Please note that this set of rules is to have business rules that belong to a database that is Capex.

    Any help on this request would be much appreciated. Please notify.

    Thank you

    AP

    Please ignore this request,

    I found the KB article below

    Hyperion Planning Rulesets cannot be launched using the CalcMgrCmdLineLauncher planning (Doc ID 1453630.1)

    Thank you

    Arun

  • How can I use the property of a node that is not related in a formula?

    Hello Experts,

    I need help with a formula.  I want to set a property 'Y', according to the following conditions:

    Node = XX_1234 - this is the node whose property we want to update 'Y '.

    Node = 1234 life elsewhere in the same hierarchy.  1234 node has a property called Custom.XX_Account and under certain conditions this property can be null, or it can be "filled with XX_1234 in the case of my example.

    I want to set the property indicator = 'Y' for node XX_1234 when Custom.XX_Account property node 1234 = "XX_1234."

    I know that substring off the "XX_' of my node (XX_1234) but I don't know how to find a property to another node (not related).

    Help and recommendations are greatly appreciated!

    See you soon!

    Hello

    I think that after reading your two previous posts on PQRS account (where P, Q, R, S are many) you have a XX_Account property (where XX_ is a fixed prefix?) and this property can have only two values (NULL or XX_Abbrev()).

    If (and)

    Equals (String, SUBSTRING (ABBREV (), 1, 3), XX_),

    NodeInHier (SubString (Abbrev (), 4, PropValue (Core.HierName), Length (Abbrev (())))).

    If)

    Equals (String, NodePropValue (Substring (ABBREV (), 4, length (ABBREV (())), Custom.XX_Account), ABBREV ()),

    THERE, XXX))

    (Where XXX is the Else condition you specify wana)

    I'm hoping to have read your request correctly and it helps.

    Thank you

    Denzz

  • Restoration of the accessors of class through properties

    LV2013

    When you create an accessor for a class data member, you have the possibility to make this available through nodes in property accessor class.

    I accidentally deleted a VI of the accessor.

    The VI himself is still; It's pretty easy to ADD the file in the project.

    But when I do, the properties that you to reconnect.  I can replace it with the VI and everything is fine, but there are cases where two or more values I want and I want to use a property node to get.

    How can I say this VI it should be accessible through knots of property?

    You must add a "property definition" file (as you create a subfolder in a library/project) in your class.

  • Getter ActionDescriptor: cannot use the property for nested descriptors?

    When you retrieve an ActionDescriptor, as the application, we received the order to precede the property which we are interested, as we do not get the descriptor of the entire application, but only the bit that we really need:

    // DON'T
    var ref = new ActionReference();
    ref.putEnumerated( charIDToTypeID("capp"), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") ); 
    var applicationDesc = executeActionGet(ref);
    var theInterpolationMethod = typeIDToStringID(applicationDesc.getEnumerationValue(stringIDToTypeID('interpolationMethod')));
    alert (theInterpolationMethod);
    
    // DO
    var ref = new ActionReference ();
    ref.putProperty (stringIDToTypeID ("property"), stringIDToTypeID ("interpolationMethod")); /* <-- ADD THIS */
    ref.putEnumerated (stringIDToTypeID ("application"), stringIDToTypeID ("ordinal"), stringIDToTypeID ("targetEnum"));
    var interpolationDesc = executeActionGet (ref);
    var theInterpolationMethod = typeIDToStringID (interpolationDesc.getEnumerationValue (stringIDToTypeID ("interpolationMethod")));
    alert (theInterpolationMethod);
    

    So far so good.

    Problem is that this putProperty only works when you are looking for a value such as Integer, String, Boolean, and enumeration. If you need to get a handle nested as 'currentToolOptions', this does not work:

    // FAILS
    var ref = new ActionReference ();
    ref.putProperty (stringIDToTypeID ("property"), stringIDToTypeID ("currentToolOptions"));
    ref.putEnumerated (stringIDToTypeID ("application"), stringIDToTypeID ("ordinal"), stringIDToTypeID ("targetEnum"));
    var desc = executeActionGet (ref).getObjectValue (stringIDToTypeID ("currentToolOptions")); // FAILS here
    desc;
    
    // WORKS
    var ref = new ActionReference ();
    // ref.putProperty (stringIDToTypeID ("property"), stringIDToTypeID ("currentToolOptions")); // Removed the prepended property
    ref.putEnumerated (stringIDToTypeID ("application"), stringIDToTypeID ("ordinal"), stringIDToTypeID ("targetEnum"));
    var desc = executeActionGet (ref).getObjectValue (stringIDToTypeID ("currentToolOptions"));
    desc;
    

    ... and you get the descriptor of the entire application (bad for performance), and then extract the bit you want.

    Someone has any idea why is this so, or in the case where how to properly add the property for DescValueType.OBJECTTYPE?

    Thank you!

    Davide

    Hi Davide.

    A property of the nested object extraction is usually not a problem. Unfortunately, there is a bug for options of the current tool in CS4, and it seems that it is still there in later versions.

    -Get directly the property of 'currentToolOptions' triggers the error: "the Get command is not available"!

    -Get the property declarations "tool" * two * properties "currentToolOptions" and "tool"!

    var ref = new ActionReference ();
    ref.putProperty (stringIDToTypeID ("property"), stringIDToTypeID ("tool"));
    ref.putEnumerated (stringIDToTypeID ("application"), stringIDToTypeID ("ordinal"), stringIDToTypeID ("targetEnum"));
    var desc = executeActionGet (ref);
    alert (typeIDToStringID (desc.getEnumerationType (stringIDToTypeID ("tool"))));
    alert (typeIDToStringID (desc.getObjectType (stringIDToTypeID ("currentToolOptions"))));
    desc = desc.getObjectValue (stringIDToTypeID ("currentToolOptions"));
    

    HTH,

    -Michel

  • Error in the logs when a workflow running on the web client of vSphere WARN {} [TypeQualifierToDecoratorConverter] could not find the mapping for: class ch.dunes.model.type.qualifier.TQCallerParameter, [kind:null, name:contextualParameter, value: __NULL__

    I see this error:

    WARN {} [TypeQualifierToDecoratorConverter] could not find the mapping for: class ch.dunes.model.type.qualifier.TQCallerParameter, [kind:null, name:contextualParameter, value: __NULL__]

    pop up in newspapers of vCO a few times on a workflow when I try to run it from the web client of vSphere.  I wonder if it is somehow contributing to the time it takes to render the page.  We never saw it or someone has a clue about what might be the cause.  Newspapers are clean when I run the workflow of the vCO client.

    TQCallerParameter is a kind of decorator that is not exposed in the REST API. This warning message is safe and does not affect performance at all.

    You don't see it during execution of the workflow of vCO customer because the customer vCO does not use the REST API and therefore does not need to run conversions Decorator.

  • access the property of the main class in loaded swf.

    Hello

    I have a main.fla, its document class is main.as. the code in main.as is

    package

    {

    import flash.display.MovieClip;

    SerializableAttribute public class Main extends MovieClip

    {

    private var loading: loading;

    public var trovami:Number = 10;

    public void Main()

    {

    stage.frameRate = 31;

    loadSWF();

    }

    private function loadSWF (): void

    {

    loading = new Loading (this);

    }

    }

    }

    LOADIND. ACE is another class where I load another swf name is my_swf.

    class loading code is:

    package

    {

    import flash.display.MovieClip;

    to import flash.display.SimpleButton;

    import flash.text.TextField;

    import flash.display.Loader;

    import flash.events. *;

    import flash.net.URLRequest;

    SerializableAttribute public class loading extends MovieClip

    {

    private var _fla:MovieClip;

    private var url: String;

    public var val: String;

    private var loader: Loader;

    public void Loading(fla:MovieClip)

    {

    _fla = fla.

    init();

    }

    private function init (): void

    {

    URL = 'my_swf.swf';

    var request: URLRequest = new URLRequest (url);

    loader = new Loader();

    initListeners (loader.contentLoaderInfo);

    Loader.Load (request);

    }

    private void initListeners(dispatcher:IEventDispatcher):void

    {

    dispatcher.addEventListener (Event.COMPLETE, complete);

    }

    private void completato(event:Event):void

    {

    _fla. AddChild (Loader);

    Loader.y = 10;

    Val = "Hello".

    }

    }

    }

    and the class of the loaded swf document is Main2. in my_swf.fla, there is a text, that his name is:

    a_txt.

    I so use class in Main2 for loading text property.

    Code of Main.as is

    package

    {

    import flash.display.MovieClip;

    import flash.text. *;

    Main2/public class extends MovieClip

    {

    public void Main2()

    {

    a_txt.text = val;

    }

    }

    }

    where val is the property of class loading.

    so, how do I access.

    You have a reference to your movie loaded into your class loader - instead of simply set val to string - add a method in your class Main2 - and call it loading - passing the string which him. Push not pull...

    Hand 2 becomes:

    public void Main2() {}
    a_txt. Text = Val;

    }

    public void setText(val:String):void {}
    a_txt. Text = val;

    }

    And then in your class loader - when you have finished loading only call setText:

    private void completato(e:Event):void

    {
    addChild (loader);
    Loader.y = 10;
    MovieClip (loader.content) .setText ("hello");
    Val = "Hello";
    }

  • My safari has locked up with a request for verification of the property query.  What can be done to fix this?

    My safari has locked up with a request for verification of the property query.  What can be done to fix this?

    This is the shit that came.

    Force Quit Safari (cmd-option-esc) then restart Safari by holding down the SHIFT key.

    Sorry, wrong forum... question thought it was an OS X. In any case don't give them any info.

  • Can I programmatically change the default property to create for all elements of the front panel?

    Can I programmatically change the default property to create for all elements of the front panel?

    I need to make the logout button, when click on, takes care of all the default values of my fron Panel.

    There is no way to programmatically call the functionality of an editor 'Use default' or 'Load Default'. To do it yourself, you will need to write your default values for each control explicitly in the diagram, when the user press the logout button.

Maybe you are looking for