From: justin.crawford@...
Date: 2006-07-19T07:15:08+09:00
Subject: Jruby, JDBC

Howdy-
I'm trying to build a simple connection to Oracle using JRuby.  I'm a
JRuby newbie, so my method may be quite flawed.  But I cannot seem to
get JRuby to recognize jars in the classpath (demonstration below).  I
wonder if anyone can see what I'm doing wrong?

$ jar -tf lib/classes12.jar | grep OracleDriver
oracle/jdbc/driver/OracleDriver.class
oracle/jdbc/OracleDriver.class
$ java -classpath "./lib/classes12.jar" -jar
/usr/local/jruby/lib/jruby.jar
require 'java'
include_class 'oracle.jdbc.driver.OracleDriver'
puts 'hi'

C:\jruby\src\builtin\javasupport.rb:258:in `for_name': cannot load Java
class oracle.jdbc.driver.OracleDriver (NameError)
        from C:\jruby\src\builtin\javasupport.rb:258:in
`get_proxy_class'
        from (eval):0:in `include_class'
        from -:2:in `each'
        from C:\jruby\src\builtin\javasupport.rb:405:in `include_class'
        from -:2

$ cat conn_test.java
import oracle.jdbc.driver.OracleDriver;
class conn_test {
  public static void main (String[] args) {
    System.out.println("Hi");
  }
}
$ javac -classpath "lib/classes12.jar" conn_test.java
$ java -classpath ".:lib/classes12.jar" conn_test
Hi

Thanks.
-J