Simple exception handling

Question

Hello,
I am trying to figure out how to add exception handling to a procedure so that I can save the error message into a table. Here is the simple procedure that calls another procedure, and the error is always due to some problem in the subprocedure, which will continue to occur periodically:
(var1 integer, var2 integer)
is
begin
subprocedure (var1, var2);
commit;
end;
Here is my guess for adding exception handling:
(var1 integer, var2 integer)
is
begin
subprocedure (var1, var2);
exception
insert into errortable (col1) values (error_message);
commit;
end;
I currently have the java setup with error handling using the try-catch system which displays the oracle error message in the tomcat window.
How do I setup the oracle procedure to send my user-defined error message to the tomcat window?
Any suggestions are greatly appreciated. TIA.

Answer 1

raise_application_error will automatically end the transaction by calling ROLLBACK.
So you may have to COMMIT before calling raise_application_error to perserve your insert.
But i see you are writing into errorlog. The best way to do it is have a seperate procedure, define it as a autonomous transation and call it in your exception block. Something like this
create or replace procedure log_error(pErrorMessage varchar2, pDate date)
as
  pragma autonomous_transaction;
begin
  insert into errorlog values (pErrorMessage, pDate);
  commit;
end;
/in your exception block do this.
EXCEPTION
WHEN OTHERS THEN
log_error(dbms_utility.format_error_stack,SYSDATE)---Insert Into your Table--
raise_application_error(-20101, dbms_utility.format_error_stack); ---Raise application error back to Java App---