Log user's login and logout details in to table through Oracle Forms using POST-LOGON and PRE-LOGOUT triggers to track the user's login and logout activity for auditing purposes.
In this example one table and a sequence object is used to log the data in to table called login_out and the login information would be logged through Post-Logon trigger and logout information would be logged through Pre-Logout trigger in Oracle Forms. Follow the below mentioned steps to perform this task.
1. Create a Sequence object in Oracle Database.
CREATE SEQUENCE login_seq
START WITH 1
INCREMENT BY 1
NOCACHE
/
/
2. Create a Table in Oracle Database.
CREATE TABLE login_out
(
srlno NUMBER (10) PRIMARY KEY,
loguser VARCHAR2 (20 BYTE),
indate DATE,
outdate DATE
)
/
/
3. Create a Post-Logon Trigger at Form Level in Main Form of Your Application.
DECLARE
v_seq NUMBER (10);
v_user VARCHAR2 (20) := GET_APPLICATION_PROPERTY (username);
BEGIN
SELECT login_seq.NEXTVAL INTO v_seq FROM DUAL;
/* this global variable is created to use on pre-logout trigger to update the correspondent record. */
:Global.login_seq := v_seq;
INSERT INTO login_out (srlno, loguser, indate)
VALUES (v_seq, v_user, SYSDATE);
COMMIT;
EXCEPTION
WHEN OTHERS
THEN
RAISE form_trigger_failure;
END;
4. Create a Pre-Logout Trigger at Form Level in Main Form of Your Application.
DECLARE
v_seq NUMBER (10) := :GLOBAL.login_seq;
BEGIN
Update login_out
set outdate = SYSDATE
where srlno = v_seq;
-- No need to commit here it will do automatically
EXCEPTION
WHEN OTHERS
THEN
RAISE form_trigger_failure;
END;
Now run the form and after that you can check the login_out table to view the data as following:
SELECT *
FROM login_out
WHERE TRUNC (indate) = TRUNC (SYSDATE)
/
Note: These triggers should added into Main Form only of your application, not in every form.
Note: These triggers should added into Main Form only of your application, not in every form.