In my application, JSF2.0, richfaces 3.3.3 and Tomcat.
I need, to prevent user multiple tabs in same browser.
Means, If the user login into the application, after that copying the url and paste into the other tab..that time i need to logout that user..
Help me...
Thanks inadvance.
You can and should not. You can not, because it can never be achieved reliably. JavaScript can do a lot, but you're still dependent on whether the enduser has it enabled and or the browser can successfully fire a (XML)HTTP request before the unload event, which is really a race condition. You should not, because it would completely destroy the user experience and only result in "wtf?" experiences.
You need to fix the real underlying problem for which you thought that this would be the right solution. This smells too much like session scope abuse. In that case, take your time to go through How to choose the right bean scope? You seem to really need the view scope instead.
Related
Let me start by saying I am not really a full-stack developer and this is out of my scope of understanding. I have tried searching for an answer but I can't find anything relevant. If you have any reasons to share they would be much appreciated!
I am working on a website running on coldfusion and framework one. I've been instructed to make a single specific page accessible without authentication. I know this might seem like a bad idea, security wise I have no idea how dangerous this really is but it doesn't seem great. Regardless, those are my instructions.
Where would I even do something like this? Is there some sort of "authenticator" action that I can disable? When visiting a page on the domain while logged out the user is just redirected to the initial login page. Perhaps I can disable this redirect? I've looked in the relevant controller and view pages for the area of the site I'm working on but I can't find anything and it's hard for me to google without much knowledge on the topic to begin with. Any help is greatly appreciated.
Since you state that you don't have experience with ColdFusion this answer is kept simple and does not try to explain how ColdFusion applications work or what an Application scope is in ColdFusion.
create a sub-folder within your original application folder
create your non-secure page within this new sub-folder
create another page under the same sub-folder named Application.cfm with the following code (it's just a comment, it's an empty page but it will prevent the code that re-directs to login to execute)
code for Application.cfm
<!--- // this folder is not secure --->
If this does not work for you because you need access to stuff that is part of the secured application, let me know and I'll update my answer but will get a bit more complex like you'll need to find out where the redirection to login takes place and you'll need to understand what you're doing in ColdFusion.
Greeting, brethren,
So I inherited this app (yes, XPages can be legacy now ;-). It is meant for the Notes client only and one process takes a convoluted route via what I understand is called a Managed Bean (the Code/Java design element).
The database resides on a server.
When editing said bean.java, I meet two issues.
If I test immediately thereafter, I'm greeted with an Error 500 that won't go away unless I close then restart both Notes and Designer
In some cases, changes made to bean.java are not immediately available. So far I haven't been able to characterize those cases. For example, yesterday afternoon I could no anything, nothing would bring a change to the Notes client. (Yes, I cleaned & rebuilt and autobuild is disabled). This morning changes are apparent immediatly (save for the quit/relauch bore).
I've tried to set xsp.application.forcefullrefresh=true in the app's Xsp properties but haven't noticed much effect.
What am I doing wrong ? What could I do to fluidify the modifying of a bean ?
When working in XPiNC, after every change you have to close and restart designer. If I understand things correctly, it's trying to access class files that have been discarded. That's why whenever I've had to develop for XPiNC, my initial testing during development is on a browser, I would recommend this approach.
There are minimal differences in syntax, usually only encountered if manually creating URLs to files etc or using the bad practice "" to specify database location in #DbLookup. Wherever possible, avoid #Formula approaches, their performance is worse than object orientated methods (e.g. view.getAllEntriesByKey())
It's the same for the bean. There are only two ways to speed up picking up updates - use a browser or use XPiNC on a different PC.
I'm new to Chrome extension development, and I'm a bit struggling with the architecture to put in place.
I would like to develop an extension (browser_action), that, when the button is clicked, opens a window where information will be populated from the WebTraffic.
I figured out I could use the WebRequest API to get info about the traffic.
I could create a popup window, but it's displayed only when I click on the extension button, and hides as soon as I click somewhere else
I tried creating a background window, but it does not show up.
I'd be very grateful if anyone could help me with the initial setup of my application.
Thanks in advance
You need both.
Take a look at the Architecture Overview, or maybe this question.
The lifetime of the popup is indeed equal to how long it stays on screen. It's the UI part, but putting logic there is usually bad.
A background page is permanently there but invisible. It's typically the "brain" of an extension, taking care of heavy lifting and routing messages to other parts.
In short:
You need a background script to collect webRequest information for you in some format.
You need a popup page to show it. Keep in mind it's not guaranteed to be present at a given time and can close at any time.
It's probably best to use Messaging to request the information from the background page. If you need real-time updates, you can use long-lived connections.
In your case you can also tightly couple the two and call chrome.runtime.getBackgroundPage() to directly reference stuff in it.
Can I propagate event to every user which currently connected to application? For example as a popup? Even if the user isn't actively using the application but only has its windows opened?
Actually requirement is to let to user know that a system is being shut down in X minutes.
Thank you.
UPDATE: as always before writing this post I hadn't any ideas, after writing this post ideas began to coming. I think about <p:poll> element from Primefaces library. It should be invoked periodically and check some flag in a session or even application scoped bean. If this flag became turned on it should run popup window. Are there any pitfalls? Is there better idea?
I'm developing a web app using netbeans with GlassFishv3.
Every once in a while when I add a new feature in my app, glassfish starts nagging with stupid errors, after a lot of time wasting and panicking, i restart glassfish and run my application again, then suddenly the errors all go away and my site starts acting correctly. (or in case I have made a real mistake, i receive a reasonable & descriptive error from GF.)
[Edit: the rest of the question was revealed to have been my own mistake.]
But the problems don't end there. Recently, i added the ability to write comments in a (JSF) page, after the user submits their comment, i add it to the database and redirect to the same page, so that hopefully the page refreshes with the new comment, but it wont!
The underlying Mysql database shows that the new comment has been added, but the page just wont show the new comment! I've tried everything (e.g. deleting browser cache, using different browsers) but only after restarting GF is when the page shows the new comment!
Do you have any idea what the problem could be? Could this be a Glassfish bug?
What i am using: JSF2, EJB3.1, JPA, MySql
Apparently the list of comments is not refreshed with new comment. Verify if the data loading logic is right. Maybe you've put it in the constructor of a session scoped bean instead of a request scoped bean. Maybe you haven't reloaded the list from DB after insertion (and commit). Instead of restarting GF, try to restart the webbrowser (close ALL tabs/instances) and reopen the page. If it works, then the old/non-reloaded data has indeed just been displayed from the session scope. If that doesn't solve the problem, then the problem is maybe more in the JPA area, debug if the new comment is actually persisted and committed and/or if the list is actually requested from the DB and not from the cache, etcetera.
thanks for the responses,
Yes, as Balus and Pascal mentioned, the problem lied in my own logic and fortunately not in Glassfish.
Incompetence was on my part, I admit and apologize;)
Indeed the problem was in the JPA area, I had forgotten to merge and refresh my JPA entity after adding the comments; so although the comments were added in the database, my JPA entities wouldn't reflect the changes.
By the way, FYI, I still have the occasional problem of my projects plain not building and/or not deploying into GF (while emitting weird error messages), which is always solved by restarting GF (more specifically, by restarting the default domain in GF);
It could probably be my mistake, or netbeans6.8's deployment bug, or in the unlikely case, GF's fault.