No joy linking java classes

Ruby JRuby
1

JRubycons,

i’m trying to call – from jruby – a java class i’ve developed. i’ve
got
the class archived in a jar file; but, every procedure i can find for
using
java code from jruby fails. i’ve included my latest attempt below. Any
help
would be greatly appreciated.

Best wishes,

–greg

pipes_controller.rb:

include Java

$CLASSPATH <<

“…/pipes_to_cal/target/classes/com/biosimilarity/magritte”

$CLASSPATH <<

“…/…/…/quant/quant/target/classes/com/biosimilarity/mcbond”

$CLASSPATH <<

“/Users/lgm/work/src/projex/bobj/quant/quant/target/classes/com/biosimilarity/mcbond”
require
‘/Users/lgm/work/src/projex/bobj/quant/quant/target/quant-1.0-SNAPSHOT’
require
‘/Users/lgm/work/src/projex/bobj/magritte/pipe-cutter/pipes_to_cal/target/pipes_to_cal-1.0-SNAPSHOT’

module Quant

include_package “com.biosimilarity.quant.mcbond”

end

module PipesToCAL

include_package “com.biosimilarity.magritte”

end

import “com.biosimilarity.magritte.PipesToCALBridge”

class PipesController < ApplicationController

todo: make preview the only thing that’s posted?

def index
@categories = Category.find(:all, :order => :name)
end

def ajax_pipe_load
end

def ajax_pipe_preview
# to grab the request

begin
  reqOutputF = File.open("reqOutput.json","w+")
  reqOutputF << "\n JSON string\n"
  reqOutputF << params[:def]

  com.biosimilarity.magritte.PipesToCALBridge.parseRequest(params[:def])

  reqOutputF << "\n Done\n"

rescue Exception => msg
  reqOutputF << "\n Error calling Pipes to CAL bridge \n"
  reqOutputF << msg.to_s

ensure
  reqOutputF.close

  render(:json => '{"ok":1,
 "errors":{
    "modules":{},"pipe":null
 },
 "preview":{
 },
 "stats":{
    "pua":{}
 }
}
')
end

end

console output:

bash-3.2$ ls -al
/Users/lgm/work/src/projex/bobj/magritte/pipe-cutter/pipes_to_cal/target/
total 32
drwxr-xr-x 9 lgm lgm 306 May 28 18:00 .
drwxr-xr-x 5 lgm lgm 170 May 28 17:10 …
drwxr-xr-x 3 lgm lgm 102 May 28 17:11 classes
-rw-r–r-- 1 lgm lgm 1 May 29 04:03 classes.timestamp
drwxr-xr-x 3 lgm lgm 102 May 28 17:23 maven-archiver
-rw-r–r-- 1 lgm lgm 4578 May 29 03:19 pipes_to_cal-1.0-SNAPSHOT.jar
drwxr-xr-x 4 lgm lgm 136 May 28 17:20 surefire-reports
drwxr-xr-x 3 lgm lgm 102 May 28 17:20 test-classes
-rw-r–r-- 1 lgm lgm 1 May 28 17:23 test-classes.timestamp
bash-3.2$ script/server
=> Booting WEBrick…
JRuby limited openssl loaded. gem install jruby-openssl for full
support.
http://wiki.jruby.org/wiki/JRuby_Builtin_OpenSSL
=> Rails application started on http://0.0.0.0:3000
=> Ctrl-C to shutdown server; call with --help for options
[2008-05-29 05:42:31] INFO WEBrick 1.3.1
[2008-05-29 05:42:31] INFO ruby 1.8.6 (2008-05-27) [java]
[2008-05-29 05:42:31] INFO WEBrick::HTTPServer#start: pid=26634
port=3000
0:0:0:0:0:0:0:1%0 - - [29/May/2008:05:42:46 PDT] “GET / HTTP/1.1” 500
2357

  • → /

response display in browser:
NameError in PipesController#index

cannot link Java class com.biosimilarity.magritte.PipesToCALBridge

RAILS_ROOT: /Users/lgm/work/src/projex/bobj/magritte/pipe-cutter/rails
Application Trace http://localhost:3000/# | Framework
Tracehttp://localhost:3000/#| Full
Trace http://localhost:3000/#

Request

Parameters:

None

Show session dump http://localhost:3000/#

flash: !map:ActionController::Flash::FlashHash {}

Response

Headers:

{“Cache-Control”=>“no-cache”,
“cookie”=>[]}

manifest of jar file:
bash-3.2$ pwd
/Users/lgm/work/src/projex/bobj/magritte/pipe-cutter/pipes_to_cal/target
bash-3.2$ jar tvf pipes_to_cal-1.0-SNAPSHOT.jar
0 Thu May 29 03:19:06 PDT 2008 META-INF/
122 Thu May 29 03:19:04 PDT 2008 META-INF/MANIFEST.MF
0 Wed May 28 17:11:26 PDT 2008 com/
0 Wed May 28 17:11:26 PDT 2008 com/biosimilarity/
0 Wed May 28 17:11:26 PDT 2008 com/biosimilarity/magritte/
1097 Wed May 28 17:11:26 PDT 2008
com/biosimilarity/magritte/App$.class
702 Wed May 28 17:11:26 PDT 2008 com/biosimilarity/magritte/App.class
1045 Thu May 29 03:12:52 PDT 2008
com/biosimilarity/magritte/PipesToCALBridge.class
0 Thu May 29 03:19:06 PDT 2008 META-INF/maven/
0 Thu May 29 03:19:06 PDT 2008
META-INF/maven/com.biosimilarity.magritte/
0 Thu May 29 03:19:06 PDT 2008
META-INF/maven/com.biosimilarity.magritte/pipes_to_cal/
2838 Wed May 28 17:07:34 PDT 2008
META-INF/maven/com.biosimilarity.magritte/pipes_to_cal/pom.xml
130 Wed May 28 17:23:42 PDT 2008
META-INF/maven/com.biosimilarity.magritte/pipes_to_cal/pom.properties
bash-3.2$

L.G. Meredith
Managing Partner
Biosimilarity LLC
806 55th St NE
Seattle, WA 98105

+1 206.650.3740

http://biosimilarity.blogspot.com

2

JRubycons,

i realized i should have included the following info in my query.

bash-3.2$ which jruby
/opt/local/bin/jruby
bash-3.2$ jruby --version
ruby 1.8.6 (2008-05-27 rev 6555) [i386-jruby1.1.1]
bash-3.2$

Best wishes,

–greg

On Thu, May 29, 2008 at 5:50 AM, Meredith Gregory
[email protected]
wrote:

require
class PipesController < ApplicationController
def ajax_pipe_preview
reqOutputF << “\n Done\n”
“modules”:{},“pipe”:null

-rw-r–r-- 1 lgm lgm 4578 May 29 03:19 pipes_to_cal-1.0-SNAPSHOT.jar
[2008-05-29 05:42:31] INFO ruby 1.8.6 (2008-05-27) [java]
Application Trace http://localhost:3000/# | Framework Tracehttp://localhost:3000/#| Full

702 Wed May 28 17:11:26 PDT 2008 com/biosimilarity/magritte/App.class
META-INF/maven/com.biosimilarity.magritte/pipes_to_cal/pom.properties
http://biosimilarity.blogspot.com
–
L.G. Meredith
Managing Partner
Biosimilarity LLC
806 55th St NE
Seattle, WA 98105

+1 206.650.3740

http://biosimilarity.blogspot.com

3

Hi,

Can you start the web servier with JRuby in debug mode, like this:

jruby -d script/server

You might see some additional stacktraces that could clarify what’s
going on.

Thanks,
–Vladimir

On Thu, May 29, 2008 at 2:57 PM, Meredith Gregory
[email protected] wrote:

Best wishes,

java code from jruby fails. i’ve included my latest attempt below. Any help
“…/pipes_to_cal/target/classes/com/biosimilarity/magritte”

end

def index
reqOutputF = File.open(“reqOutput.json”,“w+”)
reqOutputF << msg.to_s
“stats”:{
/Users/lgm/work/src/projex/bobj/magritte/pipe-cutter/pipes_to_cal/target/
bash-3.2$ script/server

Request
Response
0 Thu May 29 03:19:06 PDT 2008 META-INF/
META-INF/maven/com.biosimilarity.magritte/
Biosimilarity LLC
Managing Partner
Biosimilarity LLC
806 55th St NE
Seattle, WA 98105

+1 206.650.3740

http://biosimilarity.blogspot.com

To unsubscribe from this list, please visit:

http://xircles.codehaus.org/manage_email
4

Vladimir,

Many thanks! That helped me resolve the problem (a dependency that had
escaped the archive).

Best wishes,

–greg

On Thu, May 29, 2008 at 6:00 AM, Vladimir S. [email protected]
wrote:

–Vladimir

ruby 1.8.6 (2008-05-27 rev 6555) [i386-jruby1.1.1]

JRubycons,

module PipesToCAL

end
reqOutputF << params[:def]
ensure
}
total 32
=> Booting WEBrick…
2357
Application Trace | Framework Trace | Full Trace
flash: !map:ActionController::Flash::FlashHash {}
/Users/lgm/work/src/projex/bobj/magritte/pipe-cutter/pipes_to_cal/target
com/biosimilarity/magritte/PipesToCALBridge.class

To unsubscribe from this list, please visit:

http://xircles.codehaus.org/manage_email

–
L.G. Meredith
Managing Partner
Biosimilarity LLC
806 55th St NE
Seattle, WA 98105

+1 206.650.3740

http://biosimilarity.blogspot.com