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How to add custom FTL pages in Keycloak?

I want to add a custom FTL-page to the existing Keycloak pages.
Let's call it 'special-number.ftl' that contains a form where you can enter a number and send it to the backend. The submit button should trigger custom java code that I wrote.
How do I do this? How do I trigger a custom FTL-page to be shown and trigger some code I wrote with a click on the submit button?

Assuming you have created a page in your local, then run the following command from a cli:
docker cp special-number.ftl containerId:/opt/jboss/keycloak/themes/base/account
ContainerId will be your docker container id.
In the above example, it is going to the base themes, you can change it to wherever you want it to go.

Adding Iframe from module as portlet in liferay7

I am new to liferay and using Liferay7. Now Instead of adding iframe manually in the portal i want to make a module and add it as a portlet and then want to make the iframe url dynamic so that i can change the url of the iframe based on some UI action in the portal. Any suggestions as to how it can be done?

If you aware, there's already liferay iframe portlet available.
http://www.liferay.com/community/wiki/-/wiki/Main/Iframe%20Portlet
You can either customize it or write your custom iframe event portlet.
Custom iframe event portlet will listen to any events from other portlet and act accordingly. You can write event portlet using following link, check for Event Inter-portlet Communication
https://web.liferay.com/community/wiki/-/wiki/Main/Portlet+to+Portlet+Communication
From other portlet you can either trigger this event which will force iframe portlet to change url.

call mainActivity method from angularJs for paytm SDK

I want to implement Paytm payment gateway, I have a payWithPaytm button. On paytm documentation there is this method which has to be executed. On click of button, how to call this method from AngularJs. I am using ionic1.
I can think of one option i.e. to override
shouldOverrideUrlLoading(WebView view, String url)
above method. Is there any other way I can achieve this, I am newbie in android development.
I found answers on google like this but they are using layout file to create the buttons and attaching on click method on this but I have html and angularJs.

Logging custom action event Liferay - user add + delete

Does anybody know how can I log to a file the creation/deletion event for an user in Liferay 6.2? Is there any 'listener' that I must watch for or any action (struts action) that can be overwritten to achieve this?
I successfully used a hook to log the login and logout events, using custom action and portal properties.
If anybody knows a way to log certain events (e.g. adding user to an usergroup or something similar) using custom code (maybe JSP), please share with me.

This will be helpful
Its a tutorial to override liferay service action.
http://proliferay.com/liferay-service-hook-override-liferay-service/

Eclipse Servlets take a long time to update

I'm testing running a simple Servlet from within Eclipse. When I click 'Run', the console says it is starting TomCat, and then an internal browser launches within Eclipse which shows my code.
However, if I make any changes in the servlet and click 'Refresh' in the browser, the changes don't show. Then, a few seconds later if i hit refresh, the changes begin to show randomly. So I'm guessing there's a cache setting somewhere that controls this.
How can I turn that cache setting off or otherwise make the Eclipse internal browser update instantly as soon as I hit refresh?

This is caused by the way servlet developing works. When modifying your servlert, it needs to be submitted to the servlet container after compiling it. The servlet container itself needs to reload the servlet, the servlet must be instantiated (servlet lifecycle). Thats a lot of things to do, which may cause you waiing for an update visible in the browser some seconds.