From: Torsten Wagner <torsten.wagner@gmail.com>
To: Eric Schulte <schulte.eric@gmail.com>
Cc: Org Mode Mailing List <emacs-orgmode@gnu.org>
Subject: Re: How-to evaluate Java-snippets in org-mode/org-babel?
Date: Thu, 28 Jul 2011 19:49:12 +0900 [thread overview]
Message-ID: <4E313EA8.3010008@gmail.com> (raw)
In-Reply-To: <87aacba7u4.fsf@gmail.com>
[-- Attachment #1: Type: text/plain, Size: 2671 bytes --]
Hi Eric,
some feedback of first testing weeks....
It works well on my desktop machine, I tried to do the same on my
laptop. However, I faced the problem that java did not find the files.
I tried everything. Made sure using the same java and emacs version
(same linux distro, same test file). Copied over .emacs config files,
compared the versions of ob-java.el on both machines. I couldn't figure
out why it works with one and does not work on the other machine.
Somehow the classpath seems to differ buy I do not see where to change
it in the correct way.
I hacked a bit into ob-java.el file. I noticed that you call the
generated class file by creating the string
java packagename/classname
whereas packagename/classname is coming from the classname variable set
at the source-code block.
In the earlier attempt we used
java -cp . packagename.classname
which makes sure the classpath is set to the local directory.
I hacked this into your code and now it works on the laptop too (to say
this modification works on both desktop and laptop). It might be worse
to add, since the classpath seems to be set depending on many parameters
(distro, other java ides, local user settings, etc.). Thus, many might
observe problems at this point.
Please find a patch attached.
Even better would be to add an option to set the classpath but my elisp
skills are to poor for that.... but would like to see how to do it ;)
#+BABEL: :classpath "."
where it might be the local directory by default?!
Beside of that I noticed that there might be a need for a plain-text
mode.. sounds funny, but maybe sometimes someone need auxiliary files
which are not executed by themselves. Sure I could use simply a shell
session and echo into a file, or tangle it, but I guess it might be
more elegant to have a, "only-paste-this-into-this-file-execute"
#+BEGIN_SRC: plain :filename folder/folder/testdata.csv
1, 2
2, 4
3, 8
#+END_SRC
to generate /folder/folder/testdata.csv which contains the data in the
block.
Because sometimes, one might need to call external programs or programs
in code-blocks are supposed to read data from files instead from within
org-babel.
In general this could be the standard feature for all unrecognised
languages. Probably with a warning that the required
compiler/interpreter is not configured. However, this would allow people
at least to get the source files which they could use externally. The
difference to tangle would be that one can decide block by block what to
execute. E.g., I could have several of the above "testdata" blocks and
simply executing one of them would change the input for later code blocks.
Totti
[-- Attachment #2: java_classpath.patch --]
[-- Type: text/x-patch, Size: 1177 bytes --]
From 9853070846e98c2a14452e51c8756611aa145363 Mon Sep 17 00:00:00 2001
From: Torsten <torsten.wagner@gmail.com>
Date: Thu, 28 Jul 2011 19:27:08 +0900
Subject: [PATCH] resolve problems with wrong classpath
---
lisp/ob-java.el | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/lisp/ob-java.el b/lisp/ob-java.el
index 8595a18..cee797a 100644
--- a/lisp/ob-java.el
+++ b/lisp/ob-java.el
@@ -50,7 +50,7 @@
(compile
(progn (with-temp-file src-file (insert full-body))
(org-babel-eval
- (concat org-babel-java-compiler " " src-file) ""))))
+ (concat org-babel-java-compiler " -cp . " src-file) ""))))
;; created package-name directories if missing
(unless (or (not packagename) (file-exists-p packagename))
(make-directory packagename 'parents))
@@ -65,7 +65,7 @@
(cdr (assoc :colname-names params)) (cdr (assoc :colnames params)))
(org-babel-pick-name
(cdr (assoc :rowname-names params)) (cdr (assoc :rownames params)))))
- (org-babel-eval (concat org-babel-java-command " " classname) ""))))
+ (org-babel-eval (concat org-babel-java-command " -cp . " classname) ""))))
(provide 'ob-java)
--
1.7.6
next prev parent reply other threads:[~2011-07-28 10:49 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-05 7:01 How-to evaluate Java-snippets in org-mode/org-babel? Torsten Wagner
2011-07-05 9:07 ` Eric S Fraga
2011-07-05 9:22 ` Eric S Fraga
2011-07-05 13:48 ` Jason F. McBrayer
2011-07-06 12:36 ` Torsten Wagner
2011-07-06 13:26 ` Eric Schulte
2011-07-06 15:14 ` Jason F. McBrayer
2011-07-06 17:11 ` Torsten Wagner
2011-07-06 19:15 ` Eric S Fraga
2011-07-06 12:28 ` Torsten Wagner
2011-07-06 13:38 ` Eric Schulte
2011-07-14 5:42 ` Torsten Wagner
2011-07-15 15:00 ` Eric Schulte
2011-07-18 1:31 ` Torsten Wagner
2011-07-18 14:53 ` Eric Schulte
2011-07-28 10:49 ` Torsten Wagner [this message]
2011-07-29 0:06 ` Eric Schulte
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