Moodle Plugins directory: EJSApp: Comments

Friday, 12 November 2021, 8:48 PM - Maria MBALLO

Fri, 12 Nov 2021 12:48:23 GMT

by Maria MBALLO.

Hello,

I can not run a simulation with ejsapp on MOODLE it shows me as an error "talbe ejsappbooking not exist"
what do you recommend for me as a solution

Monday, 5 July 2021, 9:00 PM - Pak Guru

Mon, 05 Jul 2021 13:00:41 GMT

by Pak Guru.

Hi, we are unable to run HTML5 EjsS app in Moodle 3.10, just showing white screen, we hope this plugin will compatible again someday

Thursday, 10 September 2020, 2:15 AM - Luis de la Torre

Wed, 09 Sep 2020 18:15:17 GMT

by Luis de la Torre.

Hi Esther,

I'm afraid you won't be able to make Java applets work with EJSApp any longer. Since a few years ago, this feature is not supported any longer, as web browsers do not support Java or Flash applications to be embedded in the web any more. There are a few residual elements like the ones you just mentioned that need to be deleted from the plugin, as they are no longer used. You should go with HTML5 EjsS apps instead of Java EJS apps.

Wednesday, 9 September 2020, 11:56 AM - Esther I.K

Wed, 09 Sep 2020 03:56:26 GMT

by Esther I.K.

Hello, I've install EJSApp and try to add activity and upload the .jar files and click save and display, no error but it shows blank page. Anyone knows why it shows blank page?
The configuration (Trust certificate file path is set to default: Default: /var/www/moodledata/firmadia.pfx, Trust certificate password is empty, Trust certificate alias is empty). Do I need to fill in those variables? Any help is much appreciated. Thanks!

Saturday, 23 November 2019, 7:37 PM - Luis de la Torre

Sat, 23 Nov 2019 11:37:24 GMT

by Luis de la Torre.

Hi, I'm afraid that, as I wrote in the notes for this new release version, there are some big changes in 4.0 that prevent EJSApp 4.0 to be upgraded from EJSApp 3.1 or older. You would need to uninstall your EJSApp plugin first and then install the new 4.0 version. Unfortunately, this would delete your EJSApp activities and you will have to add them again to your courses. You could, however, make a backup of your courses before uninstalling, then uninstall, install the newer EJSApp version and finally restore your courses. That way, the EJSApp activities would be there again and you would just need to re-upload the EjsS .zip or .jar file.

Saturday, 23 November 2019, 2:43 PM - Matthias Giger

Sat, 23 Nov 2019 06:43:20 GMT

by Matthias Giger.

The same problem occurs in Moodle 3.7.3:

Field "mainframe" does not exist in table "ejsapp"

More information about this error

×Debug info:
Error code: ddlfieldnotexist
×Stack trace:
line 561 of /lib/ddl/database_manager.php: ddl_field_missing_exception thrown
line 365 of /mod/ejsapp/db/upgrade.php: call to database_manager->drop_field()
line 818 of /lib/upgradelib.php: call to xmldb_ejsapp_upgrade()
line 524 of /lib/upgradelib.php: call to upgrade_plugins_modules()
line 1869 of /lib/upgradelib.php: call to upgrade_plugins()
line 694 of /admin/index.php: call to upgrade_noncore()

Saturday, 23 November 2019, 5:54 AM - Ricardo Caiado

Fri, 22 Nov 2019 21:54:57 GMT

by Ricardo Caiado.

Hi,

Using Moodle 3.5.2+, Postgres 9, PHP7.1

I get this error messagewhen upgrading from "3.1" to "4.0": Field "mainframe" does not exist in table "ejsapp"

Ricardo

Tuesday, 8 January 2019, 6:29 PM - Luis de la Torre

Tue, 08 Jan 2019 10:29:16 GMT

by Luis de la Torre.

Hi Nagesh,

Firefox is trying to open a Java file. Since Java applets can't be embedded into web browsers since a couple of years ago, EJSApp tries to open it through the JNLP protocol, which downloads and then runs the Java applet as a desktop application. However, for this to work, you need the Java Virtual Machine to be installed in your computer.

Anyway, I recommend you to use EJS Javascript applications instead of Java ones.

Wednesday, 2 January 2019, 8:27 PM - Nagesh Japa

Wed, 02 Jan 2019 12:27:00 GMT

by Nagesh Japa.

Hi I have installed ejsapp and ejsapp_file_browser plugins as shown in the Guide to install and use EJSApp and EJSApp File Browser video. I am getting error when I am trying to create a lesson in a course :

The address wasn’t understood

Firefox doesn’t know how to open this address, because one of the following protocols (jnlp) isn’t associated with any program or is not allowed in this context.

You might need to install other software to open this address.

Please help me on this error, thanks in advance.

Friday, 4 May 2018, 3:41 PM - Luis de la Torre

Fri, 04 May 2018 07:41:41 GMT

by Luis de la Torre.

Dear Rathankar,

Embedded Java applets are no longer supported by any web browser, so I decided to deploy the Java applets through the Java Netjork Launch Protocol (JNLP), as desktop applications. You don't open jnlp files in the browser, the Operating System opens them. What is exactly your problem when opening a jnlp file? If you give me more details, maybe I could help you.

If you prefer the simulation (or remote lab) to be embedded in the browser, you should move to Javascript. EjsS allows creating Javascript applications in a very similar way as the Java applications were created, and you can add them to your Moodle course exactly the same way you do it with Java applets in an EJSApp activity.

The EJSApp private files browser serves for different purposes (saving and loading files related to EJSApp lab activities).

Sunday, 29 April 2018, 4:05 PM - rathankar rao

Sun, 29 Apr 2018 08:05:29 GMT

by rathankar rao.

Hi, I tried using EJSApp on my website. When i click on the installed application in moodle, the application downloads a jnlp file and i need it to open in the browser itself. I also tried installing EJS private files browser, but it is still not working. any help is appreciated

Sunday, 14 January 2018, 9:09 PM - Luis de la Torre

Sun, 14 Jan 2018 13:09:59 GMT

by Luis de la Torre.

Hi Dinis,

Yes it is. I forgot to change the info here (I will do right now), but it works perfectly fine with Moodle 3.4

David, unfortunately, your I didn't read your message. I'm afraid I can't be of much help with your description of the problem. If you are still interested in fixing it, maybe we could have a skype meeting.

Sunday, 14 January 2018, 8:48 PM - Dinis Medeiros

Sun, 14 Jan 2018 12:48:38 GMT

by Dinis Medeiros.

Is it 3.4 compatible?

Friday, 6 October 2017, 8:41 AM - David Dunn

Fri, 06 Oct 2017 00:41:45 GMT

by David Dunn.

Reporting back: The instructor says that he has tried the JavaScript solution, but only a blank page loads.

Saturday, 16 September 2017, 9:40 PM - David Dunn

Sat, 16 Sep 2017 13:40:36 GMT

by David Dunn.

Thank you, Luis, for your helpful response. I will follow up with our instructors.