Call procedure from form which displays HTML

Question

I have a form based on a table with three columns. When I press the insert button, I want to insert the data into the table and then pass the data to a procedure (wihtin a package), which will call an external java procedure and get a passcode returned to it. I then need to display the passcode to the user's screen (which I am currently attempting to do via htp/htf calls within a procedure in the package).
I tried to put the call to the package in a trigger. It succeeded in calling the external procedure, but did not display anything to the browser afterwords.
I then tried to put the call to the PL/SQL code on my Insert button. I have tried various flavors of this call, but here is the current version:
declare
v_user_key_id lcams_db.user_token_link.user_key_id%TYPE;
v_tkn_ser_no lcams_db.user_token_link.tkn_ser_no%TYPE;
v_actv_ind lcams_db.user_token_link.utl_actv_ind%TYPE;
blk varchar2(10):='DEFAULT';
begin
v_user_key_id:=p_session.get_value_as_number(
p_block_name=>blk, p_attribute_name=>'A_USER_KEY_ID');
v_tkn_ser_no:=p_session.get_value_as_varchar2(
p_block_name=>blk, p_attribute_name=>'A_TKN_SER_NO');
v_actv_ind:=p_session.get_value_as_varchar2(
p_block_name=>blk, p_attribute_name=>'A_UTL_ACTV_IND');
lcams_db.otp.set_otp_user_key_id(v_user_key_id);
lcams_db.otp.set_otp_tkn_ser_no(v_tkn_ser_no);
lcams_db.otp.set_otp_actv_ind(v_actv_ind);
doInsert;--- This is the default handler
lcams_db.otp.otp_utl('INSERTING');
end;
otp is the package. I have three variables in my package otp_user_key_id, otp_tkn_ser_no, and otp_actv_ind which I pull from session storage and put into the package variables. the otp_utl sets a variable and calls otp_add_user, which gets more data from the table and calls the pl/sql wrapper for the java routine to actually add the user into the external OTP database. The java routine returns the status and initial passcode and then I call a routine internal to the package to display the results to the user via htp and htf calls.
The best result was getting the table to update and the external database to update, but I never got the resulting html to diplay. With the current code, the browser goes away with a message of Connecting to... and nothing gets updated and my browser eventually comes back with a 'No data...' message.
Is there a way to do what I want? Ideally I would like to call the package, display the results, and provide a back link so the user can get back to the original form after the user has read the passcode message.
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Answer 1

Okay. I put the following code in the 'On successful submission of the form...'
section of the form and I tinkered with it until it works; however, it currently assumes
the Insert button was the button clicked.
declare
v_user_key_id lcams_db.user_token_link.user_key_id%TYPE;
v_tkn_ser_no lcams_db.user_token_link.tkn_ser_no%TYPE;
v_actv_ind lcams_db.user_token_link.utl_actv_ind%TYPE;
blk varchar2(10):='DEFAULT';
my_url VARCHAR2(200);
return_url VARCHAR2(200);
begin
v_user_key_id:=p_session.get_value_as_number(
p_block_name=>blk, p_attribute_name=>'A_USER_KEY_ID');
v_tkn_ser_no:=p_session.get_value_as_varchar2(
p_block_name=>blk, p_attribute_name=>'A_TKN_SER_NO');
v_actv_ind:=p_session.get_value_as_varchar2(
p_block_name=>blk, p_attribute_name=>'A_UTL_ACTV_IND');
my_url := 'lcams_db.otp.otp_utl?' | |
'p_user_key_id=' | | TO_CHAR(v_user_key_id) | |
'&p_tkn_ser_no=' | | v_tkn_ser_no | |
'&p_actv_ind=' | | v_actv_ind;
call(my_url,return_url);
end;
How do I determine which button was clicked for the 'On successful submission...' section so I can call the correct routine?
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