Detect user event and session expiration
Hi,
Can we monitor the time gap between user events in a flash
movie. This is to detect when the user doesn't do anything, or
leave, and his/her logged profile is still open in the flash movie
on the browser. So to avoid to have inappropriate use of the logged
profile by a third party, then the flash movie could detect if
there is no activity for 5 min. then redirect to the login screen.
Does a case like that need an actionscript timer ? Have you
seen any examples of that?
Thanks,
Marty
You don't.
You might be able to use the session for this. You could have an Object that gets notified when the user session is unbound. This would atleast close your stuff after the session times out if the user closes the browser.
Take a look at http://java.sun.com/products/servlet/2.2/javadoc/javax/servlet/http/HttpSessionBindingListener.html
Similar Messages
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Hi,
I have questions about "Accounting-Start" and "Accounting-Stop".
1.If a NAS configured to have a primary and a backup RADIUS server. To start with all the “Accounting-Start” records will be in the primary RADIUS server. Later on the primary server goes down (Primary server won’t tell the NAS?). When sessions stop, the NAS sends the “Accounting-Stop” to the secondary. I understand the “Start-Stop” record with the same “user name” and “session-id” ideally should be recorded in the same server. If this situation happens what should both the NAS and RADIUS server do?
2.A NAS configured to have a primary and backup RADIUS server. To start with all the “Accounting-Start” records will be in the primary RADIUS server. Later on the administrator decided to change the primary server (as there are problems with the previous primary). sessions stop, the NAS sends the “Accounting-Stop” to the new primary. This ends up the “Accounting-Start” and “Accounting-Stop” with the same “user name” and “session Id” in two RADIUS servers.
To summarize, how to avoid the ”start-stop” pair ends up in different servers ? If it does, is it an issue for RADIUS application ?
Cheers,
1.If a NAS configured to have a primary and a backup RADIUS server. To start with all the “Accounting-Start” records will be in the primary RADIUS server. Later on the primary server goes down (Primary server won’t tell the NAS?). When sessions stop, the NAS sends the “Accounting-Stop” to the secondary. I understand the “Start-Stop” record with the same “user name” and “session-id” ideally should be recorded in the same server. If this situation happens what should both the NAS and RADIUS server do?
2.A NAS configured to have a primary and backup RADIUS server. To start with all the “Accounting-Start” records will be in the primary RADIUS server. Later on the administrator decided to change the primary server (as there are problems with the previous primary). sessions stop, the NAS sends the “Accounting-Stop” to the new primary. This ends up the “Accounting-Start” and “Accounting-Stop” with the same “user name” and “session Id” in two RADIUS servers.
To summarize, how to avoid the ”start-stop” pair ends up in different servers ? If it does, is it an issue for RADIUS application ?
Cheers,vignesh and BalusC,
following is the code in front controller's doFilter method. is this not thread safe?
HttpServletRequest req = (HttpServletRequest) request;
HttpServletResponse res = (HttpServletResponse) response;
HttpSession session = req.getSession();
somepackage.User user;
if(session.getAttribute("user") == null){
user = new somepackage.User();
session.setAttribute("user", user);
}else{
user = (somepackage.User) session.getAttribute("user");
}user object maintains all information about a user. if it is in session scope, everything should work fine.
another observation is after some time of usage, both people in different systems are getting same session.getId()
in my logout page i am using
session.invalidate();
thanks,
moses -
Acquiring images and detecting user event simultaneously
Hello,
I'm building an interface to acquire and process still images and videos.
As I'm a beginner in Labview, until now I haven't use multithreading, but I would like to improve my interface by allowing , for instance, the user to run the same process subvi for two different images ( there would then have two front panel popup window of the same subvi working on different images ) and to still be able to push some buttons in the interface to trigger another events. How could I do that and is it difficult to build ? For the moment, I used an architecture consisting in an event structure inside a while loop. Therefore I can't work on two images simultaneously.
Thank you for your answer !> As I'm a beginner in Labview, until now I haven't use multithreading,
> but I would like to improve my interface by allowing , for instance,
> the user to run the same process subvi for two different images (
> there would then have two front panel popup window of the same subvi
> working on different images ) and to still be able to push some
> buttons in the interface to trigger another events. How could I do
> that and is it difficult to build ? For the moment, I used an
> architecture consisting in an event structure inside a while loop.
> Therefore I can't work on two images simultaneously.
>
It sounds like you want to asynchronously run one or more subVIs, and
possibly get notified when they are closed. A regular subVI call waits
until the
subVI returns, which means that at least part of the calling
diagram is waiting. If you use the VI Server to Open a VI reference and
execute the Run method, you do not need to wait for the subVI. It is
also possible to open another reference to a different VI, or to a
different instance of a .vit, a VI template file. This is a common
technique used to rum as many instances as you need of a subVI.
Finally, if you need notification of completion, then you can set up a
system using notifiers to pass the VI refnum and any additional data
back to the calling VI just before the subVI completes, or you can try
to use the VI close event and dynamic registration to intercept the
close event and harvest any data as the subVI is being closed.
Greg McKaskle -
Producer Consumer Subpanels, User events and DAQ
Hello All,
I am working on a Producer Consumer application and have beed looking at subpanels for user navigation. The application needs to be capable of responding to user generated events but also manage data received from attached data acquisition and control hardware. This is a 2 part question.
I need to implement about 15 screens in this application and have started integrating subpanels. I need to be able to navigate from one subpanel vi to another using subvi buttons but dont understand how to build this functionality. Can I build functionlaity so that when I click on a subpanel loaded vi's button it will load the vi referenced by that button and the original dissappears.
I have a 3 loop producer event template consisting of (1)data acquisition producer, (2) user event producer and (3) consumer loop but theres not much detail, are there any reasonable templates out there? I have seen the data- consumer and user-consumer but no mix of all 3.
Advice appreciated
ChrisI use subpanels to host my display vi's and control them dynamically. I would have a loop or vi process that manages your subpanel. You could use user events, queues or notifiers to send messages to this subpanel manager to perform the basic functions such as loading a vi into a subpanel, removing a vi from subpanel (you can remove and stop the vi or keep the vi running in the background or even make it a floating vi.) A subpanel button can create a local event which in turn could trigger a user event or message to the subpanel manager. I have attached my subpanel manager to give you some ideas...
Attachments:
Subpanel Manager.vi 39 KB -
HCM P&Forms:How to create a user event and scenario step mapping
Hi Friends
I have a problem with Form Scenarios --> Other Attributes -->User Events:
At present the values are: Operation :- the_operation_name
Field Groups :- Field Group assigned
Usable from scenario step :- Emp_Req_scenarion_stepname1
I need to enter a new mapping here so that the operation is available in another scenario step as well.
But in the edit I can enter only the operation name, not able to enter the scenario step.
Can someone please suggest a solution or work around. Your inputs are appreciated.
Thanks!
Sajimol.
Edited by: Sajimol Unni on Mar 2, 2010 11:54 PMNot quite true. A "user event" looks at what fields you selected for your "field group" for the event. Then ANY operation that has that field associated with it will get called (unless a "rule" stops it). User Events in HCM P&F are REALLY BAD in my opinion (I have ranted on them in many threads, blogs etc.). There are ways to deal with them and also ways around using them (see my blogs). I think this is one area in HCM P&F that needs a major overhaul/re-thinking.
-
Starting a job with 2 conditions (User Event and end of job)
Hello ,
I'd like to make a process SAP which start a job depending
on 2 conditions :
Condition 1 : raise an event
and
Condition 2 : end of another job
I know that it 's possible for each conditions but is it possible for both conditions ?
Thank youhi again,
Ok, i'm sorry, my english is not yet fluent.
I'm searching a solution for an SAP administrator.
Here is his problem :
He must launch an Abap program with a job1.
The abap programm :
1>generates a spool in which you can find status code like OK or NOK and
2>raises an event (EVT_CONTINUE) only if the spool contains OK code.
Afterwards, The administrator wants to launch job2 if
2 conditions are OK :
Condition 1 : EVT_CONTINUE is raised
Condition 2 : job 1 is terminated
My question is : is-it possible with a transaction like sm36 or another to do that. (my objective is to avoid
writing an abap program)
thanks -
Detecting key events and setting caret position from a Document model
Hello, I have created a "masked" JTextField that contains specific formatting (these subclasses were created prior to the advent of Sun's implementation of masked fields, and are used extensively throughout my system, so I can't easily implement Sun's version at this time)
At any rate, here is the problem:
Consider the following "masked" field contents (date USA format):
The user keyboard input is:
"10252002", which results in the text field display of "10/25/2002"
The user presses the "delete" key in the first position of the masked field. The following result is "0/25/2002".
This is undesirable, since all the contents of the field have shifted to the left by one position, so the first "/" is now in position 2, instead of position 3. Also, the length of the field is now 9, instead of 10.
The field should really have the following contents: "02/52/002_", and the cursor should remain on the first position of the text field.
I believe need for the Document model to be able to differentiate between a "back space", and a "delete", so that my overridden "remove" method in my PlainDocument subclass can handle
insertion/repositioning of "masked literal" characters correctly, and also control the cursor movement accordingly.
What would be the best way to handle this?I would re-post to the Flex Data Services forum.
-
Alert user 5 minutes before session expires
Hi folks,
I need to provide a functionality in the web application to alert the user before the session expires. The session timeout is set to some value in web.xml. I need to track the idle time of the user using the application. If the idle time is 5 minutes less than the session timeout time, i need to provide an alert to the user regarding the session expiration time.
I tried to implement this using SessionListener but couldnt. What is the best way to implement this function?
Thanks.Mujju101 wrote:
Hi folks,
I need to provide a functionality in the web application to alert the user before the session expires. The session timeout is set to some value in web.xml. I need to track the idle time of the user using the application. If the idle time is 5 minutes less than the session timeout time, i need to provide an alert to the user regarding the session expiration time.
I tried to implement this using SessionListener but couldnt. What is the best way to implement this function?
Thanks.As my fellow poster advised javascript is the way to go.
one can pickup a random idea from the below thread of how to go about
[http://forums.sun.com/thread.jspa?messageID=9988186] -
Hello, I am a newbie regarding dynamic user events.
Basically, I want to create a user event that triggers an event structure in a subvi.
To do this, I wire up a "create new user event" and then pass the refnum to my subvi "more info" as seen below. But this piece of code get's stuck in the sub-vi and never leaves :[
here is my subvi below:
I'd greatly appreciate any help :]To stop your main vi you will need to provide a mechanism to stop your sub vi.
I would use an additional boolean User Event to do this.
(This could be shared among other subvis).
When the (let's call it) Shutdown event is received, set your subvi while loop control terminal true.
Note: When using this scheme in an exe file, if the subvi front panel is open and you shutdown the main vi, the subvi can remain open. This happened to me using LabVIEW 2010. I had to use a Front Panel Close Method to avoid this issue.
When using the Front Panel Close Method you should first check if the front panel is open or not to avoid an error.
Help the forum when you get help. Click the "Solution?" icon on the reply that answers your
question. Give "Kudos" to replies that help. -
Hi,
In a point of my vi I want to force a user event in order to enter in
an event case in run time. I want to simulate an event over a
multicolumn listbox, for example, Double Click.
How can I do it? Some example?
I am working with Create user event, generate user event and destroy user event but I don't know how it works.
Thanks very much,
ToNi.tonitpp wrote:
Sorry, the object over I want to force an event is a button and not a multicolumn listbox. It works but.... when I force a Double Click event over that button the user can see how the button is pressed automatically and I don't want the user see it, I would like to do it transparent to the user. I use a value (signaling) property node and I associate to it a true value. Another way to do it?
The event also gets triggered if you wire a FALSE to the Signaling property. It does not matter if the value actually changes, only that the signaling property is written to trigger the event. Try it!
LabVIEW Champion . Do more with less code and in less time . -
Have an AE which has errors:
Init - registers dynamic user events and Runs VI.
Write - Attempts to generate user event to write data to VI which is running (Error 1)
Close - Attempts to retrieve control value (safety cluster_out) from running VI and then close (abort).
The VI gets to run but the generate user event produces an error. I can't figure out why and I doubt this is the proper way to be doing this.Hi Battler,
I see that you've created the user events, but registering them involes the Register for Events VI, which is located in the same palette. It looks like a property node but has a satellite icon in the heading. It's very possible I'm missing something. Could you post your main and subVIs so I can take a look at them?
Pardon the messy snippet.
I have another question, too. It looks like you're closing the reference to your subVI in the init frame. Is there a reason this needs to be done?
Verne D. // LabVIEW & SignalExpress Product Support Engineer // National Instruments -
The Help surrounding User Event seems circuitous to me. I can find out how to name an event, register an event, send a event, and act when an event occurs. What I can't figure out is: what is the actual event in the examples shown? In the Programmatically Fire Events.vi example, I see a cluster of two integers attached to the Create User Event. What "event" is represented by this? A change in one integer, both? How is this a "User" event? What I need is a simple TEXT explanation that builds up a User Event step by step with numbered steps, starting with an explanation of what kinds of events can be used as User Events and building from there through the creation and registration of events to their actual use. This is a fundamental tool for modern instrumentation programming and I don't feel I'm getting the help I need.
I'm looking at Programmatically Fire Events.vi
I see that the Create User Event has some constants attached which apparently "type" the event.
I see the Register User Event which I suppose adds to a database of accessible events.
Inside an event called "Slider", I see a Generate User Event.
I am confused because the Event used in the Event Structure Case 0 is "Slider" Value Change. I can understand an event in that context: the slider moves, values change.
But then inside that event, a refnum connects to the Generate User Event this serves as a "name" but it is only code-readable so at this point, I have no idea what the name of the event within the event is.
Connected to Generate User Event is a bundle of "something" called NewVal and a 0. I suspect this means the User Event is "generated" when position has a new value (presumably the value resulting from the slider value change) and delay is 0.
The event is "generated" but I STILL don't know what that means.
In Event Structure Case 1, triggered by event Repeat switch Value change, a Generate Event with the same refnum "name" as before occurs when some calculated values are reached.
After the loop finishes, the refnum goes out and generates a new User Event with the same "name"
when position is -1 and delay is 0.
I am primarily interested in events as triggers for Cases in Event Structures. I thought User Event meant some kind of user-defined event that I could use for such a trigger. Instead, I see in this example that some other event triggers the Event Structure Case in which the User Event is "generated" and I have NO idea what happens that "event".
So, either the term "event" is used in some wildly differently context or I need more help. I have now seen the same refnum generate an "event" based on three different inputs. How is that not too confusing for a Help example?
How can I tell what help I need? This is the most confusing example I have encountered in my long history as an engineer.
Where does the generated event go? How do I use THAT event?
I just can't tell from what is provided and I can't find a tutorial or a book that describes it. -
I've read a number of whitepapers on User Events and Notify/Wait on Notification. They seem quite similar to me, and I'm not sure which to use. I have (well, when I write it) a transmit/receive VI that I think will be running in a separate thread. It's supposed to listen for TCP/IP (rx) messages and "notify" (I use that generically here) a test that's waiting for this message. That test would access some Shared Variable, or user-defined data to extract/process the message. I will (possibly) then build a message (in another shared variable) response, and "notify" the tx routine that it has something to send. I (obviously) don't have all of this worked out, but I'm assuming right now that I need to open and keep open the TCP/IP socket because it' going to be a secure (https/ssl) channel. That's why I thought I would make this a separate thread. With this in mind, is User Event or notifier more suitable or even the right approach?
Based on your description I would recommend that you use queues to pass your messages through the system. Queues are similar to notifies with one major difference. With queues you can stack up multiple messages to be processed. With a notifier you only get a single message. The event structure works best for UI types events. Though you can define your own events I don't think the event structure would be the best option for your situation. However you could still use an event structure for processing your UI events.
Mark Yedinak
"Does anyone know where the love of God goes when the waves turn the minutes to hours?"
Wreck of the Edmund Fitzgerald - Gordon Lightfoot -
How can I know when an event has occured. Like a boolean or event status that can be compared so that only if it is true I can execute another set of code ?
Abhilash S Nair
Research Assistant @ Photonic Devices and Systems lab
[ LabView professional Development System - Version 11.0 - 32-bit ]
LabView Gear:
1. NI PXI-7951R & NI 5761
2. The Imaging Source USB 3.0 monochrome camera with trigger : DMK 23UM021
OPERATING SYSTEM - [ MS windows 7 Home Premium 64-bit SP-1 ]
CPU - [Intel Core i7-2600 CPU @ 3.40Ghz ]
MEMORY - [ 16.0 GB RAM ]
GPU - [ NVIDIA GeForce GT 530 ]in that case, I have an event that tells me if an image is available from the camera. and only when an event occurs, that is if an image is available I get to save it. But when I do 2x2 scan and have to capture 3 images for each pixel, I see that it misses certain images. This doesnt happen in any particular order.
Is it nevessary to add unregister user events and destroy event after the event structure for every single pixel ?
Abhilash S Nair
Research Assistant @ Photonic Devices and Systems lab
[ LabView professional Development System - Version 11.0 - 32-bit ]
LabView Gear:
1. NI PXI-7951R & NI 5761
2. The Imaging Source USB 3.0 monochrome camera with trigger : DMK 23UM021
OPERATING SYSTEM - [ MS windows 7 Home Premium 64-bit SP-1 ]
CPU - [Intel Core i7-2600 CPU @ 3.40Ghz ]
MEMORY - [ 16.0 GB RAM ]
GPU - [ NVIDIA GeForce GT 530 ] -
Making an array of different user events refnums?
Hello all,
I have a question about dynamic user events. I have 6 different users events which I create, and would like to put into an array. (Such that I can use them in a For loop laters, taking off one event per loop and assigning it to a control of a vi) So far I haven't found a way of doing that since if I just wire the user events refnums to an array I get broken wires. (Similarly if I wire them to a build cluster structure.)
I think that you'll understand what I am trying to do if you look at my labview code in the attached vi.
In the vi I create some user events, and then wire them to the control of two vi's which will communicate to each other using these events. In the code you will see 6 Invoke Node structures where I use the "Ctrl Val.set" to pass the events to the two vi's. Obviously this is the wrong why of doing things. Since if instead of having 6 events I had 100, then I would need to put 100 Invoke Node structures on the block diagram (making it very large compared to the size of my computer screen!).
So what I would like to do, is put the user events refnums into a array, then put the one Invoke node structure into a For loop, and index the array to assign the events to the vi's programmatically.
Is there anyway of doing this? Or is there an alternative (/ better way) to what I have done?
(Baisically I have 2 vi's that run in parallel and communicate to each other using user events. I need to pass the events to both vi's, how do I do it in the minimum of mouse clicks, and minimum of screen space.)
Thank you!
Paul.
Solved!
Go to Solution.
Attachments:
CameraTempControllerRunner.vi 49 KBI haven't created any new messages since the forum changed over, so I'm not sure. But check on the menu under Options on the upper right. I think there is a way to undo your choice and put it on another.
Kudo's have replaced the stars. Anything that was 4 or 5 stars is now equivalent to a Kudo. But with the old system, anything less than 5 stars was essentially a negative opinion in the ratings. So to simplify the multiple shades of gray (1 through 4 stars essentially being some degree of a negative) and to just eliminate the negative aspect altogether, the Kudo system was born.
I don't know if the "Accepted Solution" designation does anything to help the person whose solution was accepted, but having that designation helps people searching the forum because they have the same problem find the answer quicker.
Message Edited by Ravens Fan on 10-06-2008 10:15 AM
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