Asynchronous call to the OSB

Similar Questions

• Why an asynchronous call would lead to "the VI is not executable. The full development version... »

  I built a labview moderately complex program to connect with a new parser that I build.  To briefly describe the application, the main VI is a user interface which, in an initialization step, asynchronously calls a dozen other screws each called VI is a state machine that handles communication with a component specific for my parser, whether heat controllers, regulators debit, NI DAQmx channels, a SQL database, etc..  I use the VFG and/or EI to communicate information between the main VI and each component. The system works well when it passes through NI Labview 2012 SP1 (full development Version).  I build the project successfully, but when I run the construction (on the same development machine), I encounter the "the VI is not executable.  The full development of LabVIEW version is needed to correct errors"message.

  My first troubleshooting step that was supposed to isolate the problem.  I removed all the asynchronous calls, rebuilt and the program works without errors (granted, no State machines that handle I/O bundles are running). This gave me the impression that my UI screws are not the problem.

  The next step that I took was to create a test project with a simplified user interface to call asynchronously, and control a single component.  The first part, I tried to control a heating unit, and it works perfectly.  I have build it and run without errors or problems.

  Thinking that the component should not be a problem, I add the async call for this component in my main VI, to test it.  This works well in the built environment of Labview development, without errors, but alas, I get the same message as the "VI is not executable' when I try to run the build.

  I am at a loss on how to make trouble, or it could be the cause of the problem.  Why an asynchronous call to the VI even break the construction of an executable project, but don't cause problems in an executable of side projects?

  
  

• Asynchronous call still slow down the main VI

  Hello!

  I currently have a 'main VI' quick process underway, and I have a Subvi, which is essentially a device data collection. However, this Subvi works at 1 Hz, while my main VI runs a lot faster.

  I created an asynchronous call to the Subvi and set it such that the hand is not expected to incoming data. I followed these very simple instructions: http://zone.ni.com/reference/en-XX/help/371361L-01/lvhowto/acbr_call_and_forget/

  However, when I run the present, my main VI is as slow as if I did not use an asynchronous call. For your information, the only node inside my main while loop is the node "Start Asynchronous Call.

  Is there something I'm missing about how works this Subvi without slowing down my main VI?

  Thank you very much!

  I guess that your main problem is that the DLL calls are set to run in the user interface thread.  This could prevent your main VI to update until the end of this call to the DLL.  Try to set their 'Run in any thread.

  In addition, there is no need keep saying this VI to run over and over again.  He needs is called only once.

• Asynchronous VI and the Get method of the value of the command

  With the help of LabVIEW on Async. calls to multiple instances of a parallel Exec VI, warning and recommendations paragraph indicates. "

  «Methods and properties of the VI server cannot change the parallel proceedings of an asynchronous call to the VI.» If you call the method or a VI server on a property reference VI 0x40, the property or the method cannot modify the clone of VI that the starting node the asynchronous call is actually called. Instead, the method or the property affects the original purpose of VI. To apply the VI server properties or methods for the clone of VI as the starting node the asynchronous call is actually called, call the property or method in the target VI himself . "

  There is an example of what surrounds?  What I want to do is the following:

  Async.VI is the vi launch in parallel several times. It is no doubt reentrant.

  main.VI: the Launcher vi.

  Main.VI lance async.vi clones 1, 2, 3. Each clone when it starts running, generates a reference to an object, it uses internal: Ref. What I want is to get this reference of clone 1, 2 & 3, and I was hoping that the call to the Get method control Name to do this. But so far no luck. I tried to Call and Forget and call and collect...

  

  THX.

  Laurent

  There is a condition of the big race in this example. Even if you started VI async, you cannot be sure it has populated the Ref control when you try to question him later.

  In addition, the GetControlValue method requires that the front panel of your VI is present. This is generally true when running in LabVIEW.exe LabVIEW code, but if you build your own EXE then often the Application Builder will remove before panels of subVIs where it is not considered necessary.

  Your approach might work better if you just need to pass a reference of queue in async main VI and have async VI put its Ref value on the queue. Then just main listening on the queue for incoming Refs. It will certainly work.

  Back to your original question: How can you use the asynchronous start for several instances of reentrant clone and always know what VI reference you use exactly? I think you can do it without use of VITs. I think what you want to do is NOT to use the indicator 0 x 40 for reentrancy. That means this indicator is that you can simply open a VI reference and start several clones of her at the same time. This isn't what you're trying to do. You open several individual references you want to individually control via server of VI. To do this, try to change the indicator 0 x 40 with the indicator 0 x 08 standard for loading an instance of clone environment. I'm sure that I did successfully in your case. Note that I have the info I gave you was simply obtained by trial and error and read the help, so it could be inaccurate!

• Using asynchronous calls in a while loop. How 'Skip' node and only retrieve data as it is treated

  Maybe I'm not understand asynchronous calls... but I thought I should be able to call one another VI and essentially 'jump' it is the node and only receive data as the called VI treats.  In other words, similar to the Run of VI, I can wire a wait until done? with a fake and the main VI will not wait for the other VI end of race.  The main VI continues to function, and when it passes the called node of the VI, it will receive data if it happens to be there.

  How can I call a VI in a while loop and do not wait so he could spit out the results?  Data flow is my enemy on this one...

  The first VI treats its own figures (using the iteration count) and displays them on the PC.  Other indicators are the data of the called VI.  I want to be able to work around the blue circle node and receive data only that it will be available.

  Any help is appreciated.  Thank you.

  

  What I said OR the 'Start asynchronous call' is the preferred method for starting background tasks. This call is usually used to run background tasks. For example, you have a process of journal. When your application starts it would use the "asynchronous call Start" to start the process of journal and then move on to the other stuf. The process of the journal would then happily run in the background and the main application is free to do other things. Of course when implementing these types of systems you need a way to coordinate things like exit. This is where the queues and stuff come it.

• Why the OSB is called stateless?

  Hi team,

  I often hear this "OSB is stateless and BPEL is dynamic," but never had an explanation for the same support. I went by this blog once again the same are mentioned here, but any theory about it Can I get some information as possible to this?

  Thanks in advance,

  Malcolm.

  Hi seb,

  I'll try to give you my explanation in this regard.

  The main difference between the two components of Oracle SOA Suite (OSB and SOA Infrastructure service engines) is that SOA Infrastructure, i.e. the BPEL service engine, mediator, business, Human Workflow rules widely uses the underlying database called Infrastructure SOA metadata store. For instance when you call a synchronous service developed in BPEL service engine BPEL and SOA infrastructure c a number of inserts in the base of SOA INFRASTRUCTURE. This process is also known as dehydration. Things get more complicated when we have an asynchronous service - then we have the two dehydration - storing the State of an application in the dehydration store (the store Infrastructure SOA metadata) and restore it later (rehydration) on the back of the State in the memory of the server for execution.

  However, the OSB does not such store of dehydration, i.e. OSB acts as a proxy that passes through (with some intermediate processing) to the demands of consumers of services to service producers.

  That is why the OSB is stateless (it does not store the intermediate state of executions application OSB) as opposed to SOA that stores the application States in the store of dehydration.

  There are some cases where a composite SOA application can be configured as stateless, which will prevent the SOA to store its State in the store of dehydration.

  Hope you find my useful and reasonable response!

  Kind regards

  A.

• A limit to the reentrant instances run using the VI server and asynchronous call?

  I have an application that attempts to launch many incoming preallouees clones using the server of VI with asynchronous call to start. I find that it seems to be an upper limit on the amount of clones that can be run by using this method. 26 Nations seem to run and then in addition more clones are laid but they seem to be just sitting here do not run. I confirmed this behavior by all launch on the performance front panels.

  Is there something I'm missing here?

  You use option 0 x 40 incorrectly.   That allows you to create a pool of clones and aims to created that only once (I ran up to 10000 clones with a reference using 0x40).  If you want a clone by reference, then just use 0x80.

• LabVIEW executable not feasible using the asynchronous call

  Hello

  my project works very well from the source, but fails to run as an executable file. I was able to follow him to the asynchronous call of a VI.

  

  So far, I was able to solve the problem by using a queue dummy and loops in order to start the VI parallel to the rest of the code.

  I tried:

  1 mass recompile

  2. build the source distribution, remove existing build, create new

  3 allways include reminder all screws and all the screws called by reference via Server

  Always without success. I tried to hide the forum to find answers, but only found suggestion I already tried fail. Help, please

  So problem solved...

  Now it works.

  

  But I can't understand why and what was the problem.

• Start the asynchronous call brutal Typedef Bug

  There is a nasty bug which I think is the cause of many anomalies weird I see with the events of the user, like where some get fired and if I probe the refnum of the event on a VI that was launched using the asynchronous call node start I get some weird value for reference as 8450 or 5500 instead of some great typical integer. It is not also match the value that I get when I initialize the reference. This happens only intermittently, but I can reproduce the bug that I see on a smaller scale to a certain extent. This is not exactly the same as what I see in my current project, but I guarantee you both are related. Also, I'm pretty confident that this has to do with the help of LVlibs as well.

  So... to reproduce some questions:

  Unzip the attached code and open the project

  Open Main.vi. It is hard to see because it's pink, but notice the point of constraint on the node to call asynchronous start. This is provided at this point because I have a cluster of non-typedef in the connector pane, but a TD cluster plugged into it.

  Now open AsyncCall.vi

  Drag the eventcluster.ctl of the project on the façade of the asynccall.vi

  CTRL + x on the typedef cluster that has placed you on the front panel

  Select the non-typedef cluster by clicking it

  CTRL + v to replace the TD not cluster with the cluster of TD and save

  Return to main.vi, you will notice that the point of constraint does not go far.

  Open context-sensitive help and notice that the ctrl types match, but it's as if LV does not recognize it on the beginning of the node of the asynchronous call.

  Remove the node from asynchronous start call, then replace it. The cluster to the top wire. Voila, no point of constraint.

  Second question - same result but different method to get there.

  Now that you have components of connector typedef stress points and no more because you've taken the first steps of this 'exercise', remove the EventCluster.ctl from the library and record.

  WOAH, look the points of back strain, because node call asynchronous start still referencing the typedef cluster that he thinks that should be in the library. This can be seen by removing the cluster on main.vi and then right-click on the node to call asynchronous start on the side of the connector and creating a new constant of cluster

  It is creates a greyed out of control! Why? Well, we will reopen the context-sensitive help. Whadda you know, it's always looking for the control in Bug.lvlib that no longer exists.

  Now, the question that I'll have in my complete project that I can't post and can not reproduce on a smaller scale updates the typedef causes the dot of coercion. Otherwise I can't update my typedef cluster that contains all my events without going and replacing EVERY SINGLE launch async call node EVERY time I have add a new event.

  Major problem.

  Please let me know if these steps to reproduce were not clear or you have difficulties to reproduce the problem. I use LV2013 SP1. I opened the project in 2014 to see if it has been fixed in a later version, but I saw the same thing.

  I can repro with measurements of @GregFreeman and also confirm that I saw this same issue at least since the LV2012, but they have not reported it having not been able to provide a minimum test (thanks, @GregFreeman!) scenario

  For the record, it seems that the bug here, it is the spread of type sometimes makes an incorrect assumption / optimization as to if the conpane of the start the asynchronous call node must be updated when the source changes.

  A more obvious change - say, add/remove an entry, reverse order, or change data types altogether - always seems to spread properly.

  Incorrect optimization seems to be a terminal retains the same type of database, but transforms the type definitions - or, if the type definition is re-related or related outside a library owner.

  @GregFreeman watch the bug goes from non-typedef typedef, but it's actually worse in the other direction - when a link to a missing file is maintained.

  Call the asynchronous starting node seems to maintain a list of links that is distinct from that of the VI, and this list of links separated, this is what seems to not be properly invalidated. For example, in the screenshot, I illustrated example of Greg that the node generates no error in the compiler even after parenthood and rename the Typedef...

  

  ... even when we "Create Constant" on this terminal incriminated with list obsolete links, we get a compilation error. Since then, the grayed out type highlighted in the contextual help cannot be found, because 'Bug.lvlib:EventCluster.ctl' no longer exists, but the list of links separated from this node was not notified:

  

  It is worth noting that "Bug.lvlib:EventCluster.ctl" does not appear in the list of links of the VI at this stage.

  Often, no compiler error is generated after this failure occurs and as Greg reports, you could end up with undefined behavior (e.g. suspicious Refnums and events that seem to not fire not) (and I'll add it to this list a hearty portion of DAborts with diversion total number of messages).

  In addition, you * could * receive errors of cryptic linker for generations, but maybe not (the above screenshot, you'll notice I added two builds, neither of which seems to have a problem of building). (It seems that the broken link is travel with the distribution of the source, even if 'Disconnect the definitions of Type' is selected during the build process. That is why I believe anecdotally that node maintains a list of link separately the list of VI, and it's maybe part of the problem).

  It is noted that during this refactor (de-parent and rename) all screws and control remained open and in memory and all files have been saved. No funny business where LabVIEW would be unable to update links in a file that was not in memory.

  Another note - in the original example, all source files have been unifiles, and I can add anecdotal report this bug is much more insidious when separate compiled Code is active on the source files. In this case, the source may appear to be perfect - no point of constraint, no link expired - but the code that is currently running can be broken. In other words, what you see is not what you get, which makes debugging impossible. (This bug in particular is one of the few who makes "Cache of compiled clear objects" become a normal procedure controlled throughout the application development)

  Anyway, I wanted to draw attention to this issue, given that this thread is not yet associated with a CAR and it's a serious bug that generates a behavior undefined performance caused by a fairly normal refactor now has a well-characterized small repro case.

• deployment of the asynchronous call

  I need deploy an executable on a computer of the client and for the first time, I need to use an asynchronous call in my program I don't know how I'm going to keep the path to the 'reference of VI Open' valid after I build and deploy the application.  The obvious way would be to use a configuration file to allow me to set the path independently of the LabVIEW Application.  However, when you include A VI in the always 'include' is not an EXE so not include a file in the folder of generation, which in fact had reference on the host computer.

  Teaching tips on how to proceed would be to very help full to learn to deploy this application

  Attached is a code snippet of how I am currently using an asynchronous call

  Thank you

  Mark R.

  That's how I always call a VI by reference.  Saw the ref static VI causes LabVIEW load this VI in memory and be able to find it by name when opened.

• How to handle asynchronous calls using OSB?

  Hello

  How to handle asynchronous calls using OSB?

  Please help me?

  -Vincent

  Hello friend, here is what you need.

  Oracle Service Bus, call asynchronous Web services | Oracle... Java... OpenSource... SOA

• Call the OSB HTTPS and how to install the certificate

  Hello

  I need to call a webservice in osb service HTTPS business hollow. I already went through the link in the forum below.
  And please find the my requirement below. Any help would be appreciated.

  Call service HTTPS OSB

  Requirement: -.

  --------------------------------------------------------

  Hello

  I am also facing the same issue.

  Here is the my requirement is also the same (we have a requirement where I need to invoke a HTTPS OSB service... the system gave me 3 certificates...)

  Ditto as above mentioned error I get (the call resulted in an error: from the certificate chain [Security: 090477]-(servername here) was not trust origin SSL handshake failure..)

  1. can you please guide me how to create a certificate with 3 given certificates. measures and controls of the keytool utility.

  2. second point after changing at a given point (administration console-> < OSB Server >-> keystore keystore to define custom identity and Java Standard Trust tab.)

  
  Changed the keystore as:-custom identity and Java Standard Trust

  According to the identity
  -------------------------
  Custom Identity KeyStore:

  Custom Identity KeyStore Type:

  Custom Identity KeyStore PassPhrase:

  Confirm the custom identity KeyStore PassPhrase:
  ---------------------------------------

  Under the terms of the trust

  -------------------------------------

  Java Standard Trust KeyStore: C:\ORACLE~1\MIDDLE~1\JDK160~1\jre\lib\security\cacerts

  Java Standard Trust KeyStore Type: jks

  Java Standard Trust KeyStore PassPhrase:

  Confirm Java Standard Trust KeyStore PassPhrase:
  ---------------------------------------

  Java Standard Trust KeyStore: C:\ORACLE~1\MIDDLE~1\JDK160~1\jre\lib\security\cacerts
  Java Standard Trust KeyStore Type: jks

  are already filled with the above values

  Can you please let me know what are the need for values to appear on IDENTITY and CONFIDENCE for the rest of the values?

  Kind regards
  Sri.

  Hello

  a good tool (standard of your JDK/JRE) is keytool.

  Search in your JRE/JDK for keytool.

  Either Linux of Windows open a command window.

  Set with the keytool utility executable directory in your path (syntax differs whether you use Windows or Linux).

  Locate the desired keystore. Good practice is to use two stores: one for the certificates of TRUST and ONE for the keys. If you use the cacerts file. Right?

  keytool-import - keystore cacerts-alias - file

  keytool-import - keystore cacerts-alias - file

  keytool-import - keystore cacerts-alias - file

  When asked do trust enter Yes.

  Choose right alias for three of them. They have only local meanign (for you). Aliases don't have <> around them :)

  View the contents of the cacerts file: keytool-list - keystore cacerts

  That's all.

• asynchronous call in a synchronous proxyservice

  Dear experts,
  
  I have the following question:
  
  I want to create a synchronous service that performs an asynchronous call. Is this possible in the OSB?
  Synchronous for example asked taskservice who did a job and sends a response. After the additional work of response?
  
  Request-> TaskServiceProxyService
  ...-> Some work + validation
  Response < -.
  .................................................... -> Other work
  
  Thank you

  true

  the replacements on the body in the activity of publication affect the body that will be used on the rest of the service (so its here only for the context of the publication)

• Problem with asynchronous call and Forget.vi and MessageBoxW (user32.dll)

  I have a problem.  I want to use the same type of structure as in "asynchronous call and Forget.vi.

  

  There is a picture of my (Message Box.vi) VI.

  

  The VI expect the 'narrow reference' I select OK or cancel.  This is not the expected behavior.  If I turn off the "narrow" reference I have the expected behavior (by renaming properly the buttons).

  

  What am I doing wrong with the asynchronous call?

  Looks like close reference wants the loop of the root and your dialogue it blocks until it is finished.   I assumed that Run in the user interface thread is selected in the COLD LAKE to the MessageBoxW function, try changing to run in any thread

• Problem on asynchronous call: façade Subvi is not pop up when it is called.

  Dear all,

  I'm new to LabVIEW, and this is the first time I try to use the asynchronous call.

  I'm using LabVIEW 2011.

  I want to build a directory for several screws, and it should enable users to open more than one of the screws at the same time pressing the buttons. Before the construction of this directory, I just tried asynchronous call allows you to call a form of VI VI, but found a big problem.

  I followed the steps described in the help file, created a strictly typed reference, set the option on 80 x because I need not return. When I run it for the first time, it worked fine: the Subvi popped up and run. Then I closed the Subvi. But for the second time and, when I run the appellant VI, the Subvi does not pop up, instead it seemed to work silently on background because when I manually opened from the file that I found running. In fact, I have found no option as "display front when it is called" of the asynchronous call.

  The appellant VI and Subvi are attached. The address of Subvi calling VI should be amended accordingly.

  What should I do to make it work correctly? Thanks a lot for any idea!

  Linjxz,

  If you have ever thought a solution via the property node, then you can ignore this response.  However the easist if not the best method practice to do what you want is to: with your PS open press ctrl + I, with an "appearance of the window" selected in the drop-down window, click Customize.  Check the box "Display front panel when called" and then the correspondent "close front after ward initially closed".  Mind you as your under VI must begin execution closed to make it work while programmaticly you can over come this obstacle.

  Looking to do more with less code.

  Mark R