?
Solved

Using Java class from Oracle 9i PL/SQL

Posted on 2007-11-25
14
Medium Priority
?
789 Views
Last Modified: 2013-12-19
Hi everyone,

I am trying to find the way to execute a DOS (XP) batch file from pl/sql store procedure. I am trying to use Java.

I have found the following sample over the internet:

1.
public class SysUtil {      
        public static void runBatch(String path) {
                Runtime runtime = Runtime.getRuntime();
        try     {
            runtime.exec(path);        
        } catch (Exception e) {
            System.err.println(e.getMessage());
        }
        }
 }

2.
-- Loading and calling Java class from Oracle

2.1.  
C:\oracle9i\bin>javac SysUtil.java

2.2
C:\oracle9i\bin>loadjava -user scott/tiger SysUtil.class

3.
CREATE OR REPLACE PROCEDURE runbatch (path IN VARCHAR2)
AS LANGUAGE JAVA NAME 'SysUtil.runBatch (java.lang.String)';
/
CALL DBMS_JAVA.SET_OUTPUT (50);

BEGIN runbatch ('c:\any.bat'); END;
/

---------
I followed all steps specified in this sample. Java class has been compiled and successfully loaded into Oracle.
I created a procedure as instructed successfully as well.

But when I have tried to execute this procedure I got the following error:

ORA-29541: class POSINT.SysUtil could not be resolved
ORA-06512: at "sim.RUN_BATCH", line 0
ORA-06512: at line 2

Please advice how I can correct the problem.

Thanks and regards.
0
Comment
Question by:GoodName
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 6
  • 6
14 Comments
 
LVL 74

Accepted Solution

by:
sdstuber earned 2000 total points
ID: 20348438
not sure where "POSINT" came from

based on your pl/sql declaration, I'd say

SysUtil should be loaded into the "sim" schema.

You can do that with this...

CREATE OR REPLACE AND RESOLVE JAVA SOURCE NAMED sim."SysUtil" as
public class SysUtil {      
        public static void runBatch(String path) {
                Runtime runtime = Runtime.getRuntime();
        try     {
            runtime.exec(path);        
        } catch (Exception e) {
            System.err.println(e.getMessage());
        }
        }
 }


or you can loadjava into the sim schema
0
 
LVL 74

Expert Comment

by:sdstuber
ID: 20348449
could also be missing grants and synonyms.

If your sim pl/sql is trying to run posint java but can't find it because of a missing synonym you can either add a synonym, or move the java to the sim schema, or explicity refrence the posint schema.

If the pl/sql "can" find it but can't execute it, then grant execute on the posint java to sim.
0
 

Author Comment

by:GoodName
ID: 20351019
Hello Sdstuber,

Thanks for your comments. Please ignore the name of the schemes in my sample (sim and posint).

I have tried to implement a java function on both.

In regards to privileges I used only

grant execute on runBatch to public;

I did not used any synonyms. What I am missing here?
0
Veeam Task Manager for Hyper-V

Task Manager for Hyper-V provides critical information that allows you to monitor Hyper-V performance by displaying real-time views of CPU and memory at the individual VM-level, so you can quickly identify which VMs are using host resources.

 

Author Comment

by:GoodName
ID: 20351142
Maybe there is something wrong with this java class.

Because when I tried from command line

loadjava -resolve -user scott/tiger@sim SysUtil.class

I got an error:

errors : class SysUtil
ORA-29545 : badly formed class...
0
 
LVL 74

Expert Comment

by:sdstuber
ID: 20351204
the create and resolve code I sent above ran fine for me.  try doing that instead of using loadjava.

change the schema to whatever you need.

If you are loading the java and the pl/sql into the same schema you don't need grants or synonyms
0
 

Author Comment

by:GoodName
ID: 20353291
When I tried the way you described above it really worked without any errors. It was compiled successfully.

But when I tried to execute a batch file calling this class method it ran but did not do anything and did not generate any errors as well.
0
 
LVL 74

Expert Comment

by:sdstuber
ID: 20353295
did you grant the java privileges?
0
 

Author Comment

by:GoodName
ID: 20353652
I created a class and proc in the same schema.

What privileges should I add?
0
 
LVL 74

Expert Comment

by:sdstuber
ID: 20353814
java doesn't allow you to do much by default.
You have to be given permission to execute each file.


DECLARE
 KEYNUM NUMBER;
BEGIN
  SYS.DBMS_JAVA.GRANT_PERMISSION(
     grantee           => 'SIM'
    ,permission_type   => 'SYS:java.io.FilePermission'
    ,permission_name   => 'c:\any.bat'
    ,permission_action => 'execute'
    ,key               => KEYNUM
    );
END;
/

other permissions you might need to grant...

SYS.DBMS_JAVA.GRANT_PERMISSION(
     grantee           => 'SIM'
    ,permission_type   => 'SYS:java.lang.RuntimePermission'
    ,permission_name   => '*'
    ,permission_action => 'writeFileDescriptor'
    ,key               => KEYNUM
    );


  SYS.DBMS_JAVA.GRANT_PERMISSION(
     grantee           => SIM
    ,permission_type   => 'SYS:java.io.FilePermission'
    ,permission_name   => 'c:\some-file'
    ,permission_action => 'read'
    ,key               => KEYNUM
    );

<<ALL FILES>>  is a key word that wildcards you to all files

0
 

Author Comment

by:GoodName
ID: 20354116
I have done all as you said but with the same results. Maybe I am still missing something...
0
 
LVL 74

Expert Comment

by:sdstuber
ID: 20357798
Let's see if you're having problems running the batch file or if it's something else....

create c:\any.bat  with just one line....

echo "Hi there!" 1>> c:\anybat.log

Then assuming you've created the java and the pl/sql as sim, then log
in as sim and run

BEGIN runbatch ('c:\any.bat'); END;
0
 

Author Comment

by:GoodName
ID: 20370255
Yes, I did this  and after execution procedure nothing happened. Also no errors occurred.
0

Featured Post

Get your Disaster Recovery as a Service basics

Disaster Recovery as a Service is one go-to solution that revolutionizes DR planning. Implementing DRaaS could be an efficient process, easily accessible to non-DR experts. Learn about monitoring, testing, executing failovers and failbacks to ensure a "healthy" DR environment.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I remember the day when someone asked me to create a user for an application developement. The user should be able to create views and materialized views and, so, I used the following syntax: (CODE) This way, I guessed, I would ensure that useā€¦
From implementing a password expiration date, to datatype conversions and file export options, these are some useful settings I've found in Jasper Server.
This video shows setup options and the basic steps and syntax for duplicating (cloning) a database from one instance to another. Examples are given for duplicating to the same machine and to different machines
This video shows how to configure and send email from and Oracle database using both UTL_SMTP and UTL_MAIL, as well as comparing UTL_SMTP to a manual SMTP conversation with a mail server.
Suggested Courses

801 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question