How to prevent org-mode loading babel's major mode stuffs unless entering `org-src-mode`?

Question

I have some Java's scripts in a org file. And I use meghanada-mode in java-mode.

Each time I open this org file and do nothing, I get the following error since the mehanada server loaded by java-mode can't not find a project root for these scripts

Meghanada-Server Starting ...
error in process sentinel: meghanada--server-process-sentinel: Error:meghanada-server process stopped: finished
. Please check *meghanada-server-log* buffer

It seems that even I just open the org file org mode has already load all the major modes from org babels.

How can I prevent (or fix) this? I only want org load these things until I call C-c '.

Answer 1

You should take a look at the function org-babel-do-load-languages. I think you'll want something like this:

(org-babel-do-load-languages
 'org-babel-load-languages
 '((python . t)
   (C . t)
   (calc . t)
   (latex . t)
   (java . t)
   (ruby . t)
   (lisp . t)
   (scheme . t)
   (shell . t)
   (sqlite . t)
   (js . t)))

Just change the 't' to 'nil' for those you don't want.