Java Class to connect to oracle

Hi all,
I am a new in Java in database...
I have written a java class to connect to oracle and to get some information from the databse. In the class i use the driver oracle.jdbc.driver.OracleDriver.
When I exeute the code in JDeveloper it works fine.
I have loaded the classes to database (10gR2), have written the wrapper function. That all was compilled without errors.
But when I execute the wrapper function I get in SQL*Plus my custom Error-Message from Java Code "Not able to connect to oracle".
The oracle driver classes are owned by sys. Should SYS grant to the user any special rights with dbms_java.grant_permission?
Or is it any other way to connect to the database, in which the java classes are loaded? The user is connected with SQL*Plus. The Java Classes are owned by the user. Should I use JDBC to connect to the same database?
Best regards,

Hi
You don't need to re-connect... Have a look here...
http://download.oracle.com/docs/cd/B19306_01/java.102/b14355/ssid.htm#i1024903
HTH
Chris

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iSeries 400 Tips:
TIPS & NEWSLETTERS TOPICS SUBMIT A TIP HALL OF FAME
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Eitan Rosenberg
09 Mar 2005
Rating: --- (out of 5)
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>
I am compiling like when LD_LIBRARY_PATH set to $ORACLE_HOME/lib32:$ORACLE_HOME/rdbms/lib32.
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>
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     {     retry = true;     }
     else
     {     retry = false;     }
    finally
     try
        if (retry)
          Thread.sleep(300000);
               System.out.println("Trying connection again...");
               run();
        else
          //End
          return;
     catch(java.lang.InterruptedException e)
        return;
}any help or suggestion would be appreciated,
thanx,
greg

Greg,
why not try separating the connection part into a separate method, and add a few more System.out.println()s so you can see where you are going:
public void run()
   System.out.println("started run()");
   // Only need to do this once...
   DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
   // Keep trying until we're connected...
   while (!connect())
      Thread.sleep(300000);
      System.out.println("Trying connection again...");
   System.out.println("finished run()");
* Connects to oracle.
* @return Has connection been made?
private boolean connect()
   System.out.println("started connect()");
   try
      cnn = DriverManager.getConnection("jdbc:oracle:thin:@server:1521:orcl", "username", "password");
   catch(SQLException e)
      System.err.println(e.getLocalisedMessage());
   System.out.println("finished connect()");
   return (cnn != null);
}I'm assuming here that "cnn" (I changed the capitalisation..) is a class attribute, since it was not defined within run() in the original code.
You could probably change the last line of connect() to: return (cnn instanceof oracle.jdbc.driver.OracleDriver);This doesn't change the flow of the program (except only registering the oracle driver once) but it should help you debug.
Ben New
[email protected]
Leftclick Software Development
http://www.leftclick.com.au/

Java Class to connect to oracle

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