Subvi non-blocking output terminals?

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• Non-blocking with Perl VI API monitor task

  I am writing a perl script that needs...

  1. Suspend a virtual machine
  2. Do 'some other supervision' while the virtual machine in the suspension process
  3. Make sure that the task is complete suspension

  I was looking at the documentation for the API, but also the code example and there are many examples which have helped me understand how to do #1 and to some extent #3 by calling SuspendVM() on the managed virtual computer object (see my sample code "Option 1").  But it is not perfect for #3 and does not allow me to do #2 at all.  API documentation leads me to believe that I should be able to use SuspendVM_Task() on the virtual computer object for a task monitor-a measure of object (see 'Option 2') in my sample code.)

  However, I can't understand how to use this object task to track progress.  I think it must be something like "Block monitor" in my code, but that doesn't seem to work.  Watching a dump of the task object, "info" property seems to not even be there.  I can bless the object to its class real slot (instead of the generic ManagedObjectReference, it starts as), but then the property of the info is just empty.

  I know I probably stopped next to a simple shade of perlOO/perl/perlReference, but can not find where I'm going wrong... any help out there?

  Output of dump of the object of the task

  ========================

  $VAR1 = bless ({}
  'value' = > ' haTask-1808 - vim.VirtualMachine.suspend - 1852795401',
  'type' = > 'task '.
  (}, "ManagedObjectReference");

  Code example

  ==========

  #! / usr/bin/perl - w

  use strict;

  use warnings;

  Use Data::Dumper;

  use VMware::VIRuntime;

  past #./vmSuspend.pl--mot, username - XXXX XXXX - Server XXX.XXX.XXX. XXX - vmname XXXX

  My % opts =)

  'vmname' = > {}

  Type = > "s =",

  help = > "the name of the virtual machine.

  required = > 1,

  },

  'filter' = > {}

  Type = > "s =",

  help = > 'filter to select corresponding virtual machines. "

  required = > 0,

  },

  );

  OPTS::add_options (%OPTS);

  OPTS::parse();

  OPTS::Validate();

  Util::Connect();

  My $retval = 0;

  my $name = Opts::get_option ('vmname');

  My $vm_view = Vim::find_entity_view (view_type = > 'VirtualMachine',)

  filter = > {'name' = > $name});

  my $state = $vm_view-> run - > powerState-> val;

  Print "$name is $state\n";

  # Option 1 - blocking

  # $vm_view-> SuspendVM();

  # Option 2 - non-blocking

  My $suspendTask = $vm_view-> SuspendVM_Task();

  print Dumper ($suspendTask);

  # Block monitor

  # everything in ($suspendTask-> info-> status-> val eq 'running' | $suspendTask-> info-> status-> val eq 'pending') {}

  # < < some other surveillance > >

  #}

  $vm_view-> update_view_data();

  $state = $vm_view-> run - > powerState-> val;

  Print "$name is $state\n";

  Take a look at this script for example: http://communities.vmware.com/docs/DOC-10269 there is a method in there called getStatus() that shows you a task queue is complete before continuing. You are on the right track, but must do a few more things to get the display of the task and make sure that you update the view after sleep/wait and then check again.

• reading non-blocking

  Hello

  I'm trying to implement a lock read along the lines of peekdata() in matlab http://www.mathworks.de/access/helpdesk/help/toolbox/daq/index.html?/access/helpdesk/help/toolbox/da...

  I found I can do readings not blocked from using the reading + http://forums.ni.com/ni/board/message?board.id=230&thread.id=2862 reminders

  Is there another way to get non-blocking reads?   The reason is that if the above, I've implemented the matlab Matlab mex interface calls the file (mex) C and I do read (must wait the trigger occurs) before returning from the C file (aka it becomes again blocking). So that callbacks are not really useful if the thought in a single thread passing that matlab works.

  Thanks for reading.

  The way in which the driver is written is to block on a reading DAQmx.  In a single threaded method will always call blocking as I know.

• How to use a KeyManager custom in SSLSocketChannel non-blocking

  In our existing project I had to replace the SocketChannel non-blocking by SSLSocketChannel no blocking. My implementation of the SSLSocketChannel non-blocking mask all the SSL stuff and can be used as a SocketChannel overall of the project that just use the SSLSocketChannelProvider instead of SocketChannelProvider in one place.
  
  Now I have a new requirement. Different server-certificate should be used for various IPS on the same SSLServerSocket. The relationship between the IPs and certificates is well known. The first idea was to use a custom KeyManagerDelegate that extends from X509ExtendedKeyManager to select the certificate from the server. The KeyManagerDelegate should delegate calls to a KeyManager obtained by

  KeyManagerFactory.getInstance("NewSunX509").getKeyManagers();

  It works if I use a blocking SSLServerSocket obtained by SSLContext.getServerSocketFactory () .createServerSocket ();
  
  But the KeyManagerDelegate is never called by the SSLContext if I use my own non blocking SSLServerSocketChannel. Instead of calling my KeyManagerDelegate the SSLEngineImpl throws an Exception
  

  javax.net.ssl.SSLHandshakeException: no cipher suites in common
       at com.sun.net.ssl.internal.ssl.Handshaker.checkThrown(Handshaker.java:951)
       at com.sun.net.ssl.internal.ssl.SSLEngineImpl.checkTaskThrown(SSLEngineImpl.java:466)
       at com.sun.net.ssl.internal.ssl.SSLEngineImpl.writeAppRecord(SSLEngineImpl.java:1092)
       at com.sun.net.ssl.internal.ssl.SSLEngineImpl.wrap(SSLEngineImpl.java:1064)
       at javax.net.ssl.SSLEngine.wrap(SSLEngine.java:452) 

  The next thing I'm going to try would be to get the SSLContext to use my own SSLSocketChannelProvider as ServerSocketFactory.
  
  Or I use different SSLContext for each incoming connection, which would break my own design because the server had to waste his time with the construction of new SSLContext. Another possibility is to implement a callback in the ServerSocketChannel to get a new SSLContext for each accepted connection. It would be sure my design but looks like a ugly workaround solution for me and I do not know if it works.
  
  All the best ideas?
  
  Thanks Domi

  I just tested this with my SSLSocketChannel and it works like correctly, the KeyManager methods called as expected. You hurt something else ;-) Do not extend X509ExtendedKeyManager to work properly with the engine.

• Web HTTP proxy using IO Non blocking

  Solved thank you...

  customer. Register (selector, SelectionKey.OP_READ
  | SelectionKey.OP_WRITE);

  OP_READ only at this stage. OP_WRITE is always 'ready' unless the socket buffer is full, so your selector will turn only. Do not save OP_WRITE until you have something to write.

  ByteBuffer bferClient = ByteBuffer.allocate (4096);

  You do this each time around the loop, and you don't even know if the key is still readable. Do it when you accept a connection, and then save it as the essential accessory for this channel.

  client.configureBlocking (false);

  It is already in non-blocking mode. Why you do it again?

  try {}
  If ((bytesRead = client.read (bferClient))! = - 1) {}

  bferClient.flip ();
  String msgFromClient = new String (bferClient.array ());

  new String (bferClient.array (), 0, bferClient.limit () - 1), but you're assuming that you've got a complete command here. You do not have. This is another reason why you need a ByteBuffer by channel.

  Channel.Connect (SocketAddress);

  You should do it in non-blocking mode, save the channel for OP_CONNECT and leave the select loop to take care to complete the connection.

  Channel.Write (bferClient);

  The incoming command is CONNECT. You do not write than upstream.

  If (!) » ». {Equals (msgFromClient.Trim ()))}
  int bytesReadServer;
  response from Byte [] = new ubyte [4096];
  try {}
  ByteBuffer bufferNIO = ByteBuffer.allocateDirect (1024);
  While ((channel.read (bufferNIO))! = - 1) {}
  bufferNIO.flip ();
  customer. Write (bufferNIO);
  bufferNIO.clear ();
  }

  And you don't do that here. Register the new channel for OP_CONNECT, then when you get finishConnect() and then save it to OP_READ, and moving forward in your select loop. You also need to associate the channel with the channel that read you the CONNECTION since. If you really need an object of attachment key for the original channel that contains the buffer of bytes and the channel upstream; Similarly, the channel upstream must a key attachment that contains sound buffer and its channel downstream. The effect of making all this stuff here rather than around the loop of selection is that you're never going back to the loop of the selection: you manage what a customer here in blocking mode, until the connection is dropped. Completely wrong.

  } catch (IOException e) {}

  Hang up. If bytesRead a-1, you must close the channel.

  e.printStackTrace ();

  And if you get an IOException here you must also close the channel.

  If (channel! = null) {}
  try {}
  Channel.Close ();

  This is a really strange place to close this channel.

  When you get this fixed upward, your zip code and I will tell you how to handle the OP_WRITE.

• Modal dialog box non-blocking

  Hello world
  
  I want to display a modal dialog box, capture user input and use it for further processing, as below:
  
  showWindow(); PopupManager.createPopUp () calls
  code to deal with user input
  
  My problem is that the showWindow() call is non-blocking, i.e. the code to deal with user input is executed immediately after the posting of the modal window. How can I do to run when the modal window is closed?
  
  Any help will be greatly appreciated.
  
  Thank you
  
  Rajesh Jayaprakash
  

  You can register a listener for the event of closure of the pop-up window and then on this listener, call the method that you want to run when the window is closed.

• UTL_TCP (mode of blocking or non-blocking sockets)

  Hi all,
  
  Please, does anyone know if the UTL_TCP using blocking or non-blocking mode sockets? I did a search but cannot find this information.
  
  Kind regards

  UTL_TCP.open_connection has a parameter of tx_timeout. If set to 0, the connection is not blocking. A value of n will trigger the connection block for n seconds before exhaling. Null value causes the connection to block indefinitely.

  Published by: Cyn on February 11, 2010 10:49

• How to create the TCP non-blocking server?

  Hello

  I would like to have a TCP server at my request.  It will go about their business as usual, but in the background a TCP server sits waiting for a client connection.  If such a link exists, the normal code will send stuff on this topic otherwise it will just not send.  Currently, I do not see how to stop this blocking while it waits for a client (block waiting on TCP listener).  I looked at the example of client/server TCP, but it remains blocked in the same way.

  I would like advice on how I'm framing such a request.  I also want to do the same on the client side.  Go about business as usual and if a connection can be established at a time given, then send stuff on that connection otherwise just not worth it.

  Concerning

  Ashley

  LabVIEW parallel code usually runs in parallel. This is true even a wait - if inside a loop, you wait 100ms and other code in parallel, it is not delay execution of other code, rather he runs forward and the other code at the same time. When both have completed, the loop can proceed to the next iteration. So yes, if you have a loop with a 1000ms wait and another with an expectation of 100 ms and waits take longer to execute any parallel code in loops, then the loop of 100ms will last about 10 times as many times as the loop with the 1000ms wait.

  I recommend that you put the waiting on the listener in a separate loop and also have another parallel loop that manages the communication when the connection is established. You can then use a timeout (forever) of-1 on waiting on the listener, and this loop will be almost never run or use resources except what is first of all establish a connection. To kill this loop, close the listener somewhere which depends on waiting on execution of the listener. When a new connection is established, put the link in a queue, where the communications loop can pick it up.

• How to create a non-blocking Popup screen?

  Hello

  Basically, I want to do something similar to the State. Show (String message, bitmap Bitmap, int, long, style, boolean allowDismiss, boolean, int priority block) API where I can display a modeless popup containing various fields and still allow the user to continue to work on the screen below the pop-up window.

  Thanks for any help and suggestions.

  It is not possible. you could draw directly on the screen, it would look like a popup, but would in fact part of the screen. We do overlays in this way, for example.

• non-blocking applications

  Hello

  Can you help
  I blocked the apps so that my kids can not access things like McAfee or Netgear parent controls, I click on save and reboot the laptop, but when its reloaded, I find that the applications are still there and totally accessible to my children under their log in. That is something I don't want, I'd rather not, they have access to these and be able to change them.
  could you tell
  your

  Thank you

  I restarted the laptop several times and everything seems to work fine now.
  Fortunately I had nothing to do more.

• TestStand Non blocking deportees to interface (c#)

  Hello

  I wish to have a graphical interface (c#) for managing TestStand (read/write variables FileGlobals, Notifications of waiting/Set,...). This interface must be enabled during the activity of TestStand (graphical indicators of the status of tests, allows the activation of the subsequences, etc.), and it must use the TestStand interface (make a break, step by step debugging, see variable, States in discussions, etc...).

  I start from the example of NI TestStand '\TestStand 4.2.1\Examples\Demo\DotNet' and make a few changes:

  -call the constructor of the windows dialog with a new SequeceCall thread

  -Added management of Notification (unsing TSSyncLib, modify the constructor of the dialog box and send my FileGlobals.Notifier variable create during the stage of creation of Notification).
  -Added a button. When you press on, a variable FileGlobals number is read, + 1, then write and display in the label. And another button set a Notification.

  -Add a breackpoint in the step next to the SequanceCall of the dialog Windows

  My problem is, as long as I do not close the windows, TestStand still 'running' and do not stop on my breakpoint and unresponsive when you "Break everything" change watch Variables...

  If I change this.mDialog. ShowDialog (by this.mDialog). Show(), TestStand responds but the mistake of report of dialog Windows with FileGlobals read/write and Notification.

  My need is achievable?

  As an attachment, the file .seq (TS4.2) with the generated dll and the DotNet project.

  Thanks for help; (o)

  You must use Thread.ExternallySuspended (see using the API for more details) while your dialog box is running. Also you should consider using Execution.InitTerminationMonitor and Execution.GetTerminiationMonitorStatus.

  That said, the description of what you want to do, I thought you were going to start with a UI examples. If you really want to write a custom user interface, it is perhaps a better way to go.

  Hope this helps,

  -Doug

• I installed again by returning to the first CS6, but once again loads and a new project is created, it blocks (outputs) until I can do anything.

  I followed the procedure described on the first CC, installation first CS6 uninstall Web site, leaving still installed and reinstall CC first uninstall. I also installed the menu presets as described on another page of the website.

  Yet of the charges and I'm trying to create a new project by specifying the path and to project name. Until I can do something more, yet ends with a windows dialog on "Due to a problem must exit the program.

  I noticed that some of the text boxes were filled with the values corresponding to old projects so still contains the old configuration information from somewhere.

  Sorry; I missed what is obvious:

  See the Adobe Application preferences recreate here:

  Resolve system errors, freezes | Mac OS 10.x. Adobe software

  I think you can continued to have problems if you can not uninstall/clean/reinstall.

  If the preferences reset help, create a DVD, Blu - Ray not, for your first tests. Also, have no disc in your burner.

• A generated within a loop in a subvi output data can be transferred to the main program for each iteration of the loop?

  Hi LV users,.

  I have a very basic question, I have not succeeded to asnwer using basic considerations.

  I made a sub - vi that performs a scan of current-voltage using a unit of measurement-source Keithley and a loop FOR.

  The subvi outputs 2 tables with my data (essentially an array of voltage and the corresponding current table). I also defined a Terminal at the exit of a group of these 2 tables in order to plot a graph XY - output. Specifically, I indexed this cluster to update after each iteration of the loop FOR, in my sub - vi (the indicator is placed outside the loop, of course).

  My problem is that I want my main program to display the XY-graph in real time, with an update after each iteration of the loop FOR which is in my sub - vi.

  I have a problem because my sub - vi output terminals are available for the main program concluded as soon as the sub - vi has completed its own execution (which is what we expect of sub - vi to do).

  How can I use a sub - vi (because it's handy) and get in the main program in the course of its performance data that are generated from the loops of sub - vi?

  Thanks in advance for your help,

  Yoyo87

  Elements of the queue in the Subvi them put your main VI where you want to display the data and the.

  It is similar to the architecture of producer/consumer. There are examples of it in LabVIEW. The examples work with 2 parallel loops, in your case a loop (the producer) will be in the Subvi.

• Problems after editing a Subvi containing a group of dynamic user events

  Hello

  I like the dynamic events in graphical interfaces as a means of code reuse. But this can lead to recording a lot of dynamic events. To handle this, I have a Subvi, which saves them for me. A typical looks like this:

  

  Can I use it something like this...

  

  The first time I do it, it works really well and keeps my code (relatively) pad. The problem that I have met a few times is changing the Subvi. Suppose I have add a new event. Now my "Event Registration refnum' and 'User events' cluster outputs are broken. No problem: remove those, create new ones, bind them to the output terminals. Fine. Now go to the appellant. Maybe I again to clear some unwanted and rewire here and there due to type definitions. Cool, actually. Regard to the block diagram is, that everything will be OK at this stage; There is no broken wires. However, there always pesky errors saying "generate the user event: contains terminal unwired or bad.

  It's obviously some kind of conflict def guy in a mask. I'll generally through the entire schema tearing wires, knots, generate screws of user event, event loops, cluster unbundlers, works. So I have this code all back in hand. This arrow always gray. I'm going to compile mass once or twice. Still a no-go. Make a new VI and copy the code in there. The same problem.

  I have encountered this problem several times and don't think I've ever hit to the solution. Finally, I just go back to before the changes and give up.

  Any idea what's going on? How to get it out?

  Thank you

  Nick

  The error is because the Terminal event data are left not connected to generate the user event which is Terminal type required: https://zone.ni.com/reference/en-XX/help/371361H-01/glang/generate_user_event/

• How can I connect terminals to a vi in order to to use in the other vi?

  I created a vi that returns some numbers and I want to use these numbers in an another vi by adding the first vi in the block diagram. I need to create a sort of my first vi output terminals and I don't know how. Can someone help me please?

  On the front panel of your vi, right-click on the icon in the upper right corner (under the x).  The third option is show connector (left-click on it).  You will now see the side of the connector.  Using the tool of wiring, connect the small white boxes to your orders and such indicators as desired.  If this model is not good for you, you can use some other custom models (same menu) or create your own.  It is likely that it works perfectly.

  Good enough?