When I am creating a new session (or try to access from an other computer) in Vaadin Flow I get this error:
Can't move a node from one state tree to another
From this link, I read something about UI and getUIId().
However, I don't understand how I should change my application in order to fix the error.
As Denis mentioned in the forum post you linked, wrong scope sounds like the most likely culprit. In other words, you are trying to use the exact same component instance in two different UIs, when both UIs should have their own instance. It's not possible to use the same instance in two places at the same time.
You can find the documentation for Vaadin Spring scopes here: https://vaadin.com/docs/latest/flow/integrations/spring/scopes
One possible cause of errors such as that is that if you're storing a Component in a static variable. You shouldn't do that - a Component instance can only belong to a single UI. A single UI in turn (in practice) means a single browser tab.
Related
I want to visit an url perform some operations then open different url in different tab/window and perform some action in new tab and come back to the previous tab/window and so on. Is this possible in cypress?
Please suggest some solution if possible.
Cypress does not and will not support handling more than one tab/browser, for further read and recipes see: https://docs.cypress.io/guides/references/trade-offs.html#Multiple-tabs
I see two solutions:
Use api request for the operations needed for the external url
Divide the test in different cases
2.1. In before/beforeEach section make preparations needed
2.2. It case for first part in your project
2.3. It case for the different url
2.4. It case for the second part needed in your project
If have some repetitive data that needs to be reused - you can declare it as a variable ouside of the "describe" scope with usual JS code.
Strange enough that I have to ask such a simple question.
I started automating with UFT and I suppose the correct way to check if for instance my login has worked is to add a checkpoint on the next page.
But how do I do that?
All info I get from google is on how to add an already existing checkpoint to may page. But I don't have any.
Here is how I go about automating:
I add manually the relevant objects to the object repository
I create parameters for my action
I create the code that does the steps on the page
one action per page seems to be fine for me
But in the Object Repository of UFT 14.53, there is no button to add a Checkpoint.
A workaround for me would be to just add another Object and check it's existence and forget about checkpoints. Until I hopefully get an answer here, I will try to do just that.
In UFT there are typically two ways to verify that things are working as expected.
Flow (implicit) - In order to verify that progress in the application is successful (e.g. login) one usually just keeps working with the app, assuming that if the previous step failed, the objects needed for the next steps won't exist and the test will fail due to ObjectNotFound errors
State (explicit) - In order to see that objects have a specific state, checkpoints are usually used. Checkpoints are typically added during a record session, I'm not sure if there's a way to add them directly to the repository. An alternative to checkpoints, which works better with keyword driven testing (no recording), is to use the built in CheckProperty method.
I'm working with angular 1.
I want to load some data from server before ui-router bootstrapping all the states.
Is it possible to do so?
I would say that in this Question: AngularJS - UI-router - How to configure dynamic views and mostly in this answer you can get the answer.
The point is to use a feature of UrlRouterProvider - deferIntercept()
The deferIntercept(defer)
Disables (or enables) deferring location change interception.
If you wish to customize the behavior of syncing the URL (for example,
if you wish to defer a transition but maintain the current URL), call
this method at configuration time. Then, at run time, call
$urlRouter.listen() after you have configured your own
$locationChangeSuccess event handler.
Full description including working example is here
I have the following question:
I have an application that I'm using Marionette.Layout and this Layout has regions.
I want to add the option to the user to change language(on run time), meaning after the application is already render and the user is working, he can change the language and all the application should be change it to the selected language.
My Question:
1. I need to 'refresh/re-render' all the application, how is this done, I didn't found or I miss it, how to re-render the application?
I already have a a mechanism that the 'templates' are like:
https://github.com/janl/mustache.js/issues/216
This is working when the application is started, the first time, I need on run time to re-render/refresh with the new data
Unfortunately there isn't anything in the Marionette to do this for you. You will have to write the code to re-render the entire application with the new language setting, yourself.
Im pretty new to struts2 and Ajax ,Actually i have a drop down menu in JSP lets say first.jsp, When user select a choice from dropdown menu,I am calling a function of Action class lets say Method1.In this method i am fetching some value from DB(lets say:a,b,c) and one value from java memory lets say d.Then I am forwarding to second.jsp and display all the parameters(a,b,c and d) in tabular format.
Now problem is that the parameter d is dynamic ,this is updating by some other application and if its change then I have to show it on JSP wihout any action.
One solution is I use in second.jsp , so after interval of 10 second again Mehod1 will call and it will fetch value(a,b,c) from db and updated value of d from java memory. and disply it to second.jsp.But in this case i am unnecessary retrieving value from db while my purpose is just to get value d from memory.This is working but this is causing my application to slower.
Can any body suggetst some other solution? or can i do it using ajax and how?
Any other advice? any help is appreciated.try to be more clear, i'm in lack of ideas in this problem, even it sounds like a classic :I have spend hours trying to play around with this but have got nowhere
Okay... What you're asking is a little fuzzy so let me rephrase:
You have a user (USER1) who opens a web page and sees some data.
You have a second user (USER2) (who may be an application) who is able set a value from time to time.
When USER2 updates that value you want USER1 to see it change in their open browser window?
If this is the case you need to understand basic ajax. For that get these demo applications working:
This example uses dojo and perhaps the S2 ajax tag lib I don't remember I prefer not to use ajax tags (as they are deprecated and prefer jquery for ajax):
http://struts.apache.org/2.x/docs/struts-2-spring-2-jpa-ajax.html
This example here shows a very similar application but using jquery, no tag library, upgraded to Spring 3, it still needs polish:
http://www.kenmcwilliams.com/Downloads/
Now that you know how to get data via ajax, look at the request with firebug. You'll see that the request is just like a typical function call, the browser keeps waiting for the data to come back.
What you do is simply not return from the action until new data is provided. This is called long polling see: http://en.wikipedia.org/wiki/Comet_%28programming%29#Ajax_with_long_polling
If you have not written a simple chat program, using just terminal windows I recommend you do so. Two windows per client (client-send, client-receive windows) and you'll need a server program. I remember hacking one together in a few hours using _Thinking In Java 2nd Edition (Later books took out the networking section if I remember correctly). Anyways between understanding client server interaction and long polling will let you get things working. It would be fun to extend the simple terminal based chat application to a S2 ajax chat application. Would make an awesome tutorial! PS: This is just an application of the producer/consumer problem (If you understand that then I guess you don't need to do the fun exercise).
The interfaces would look very pretty if the server was managed by spring. I know there must be nice servers already written but I am not familiar with any, but would love to hear of one.