209 Java Web application with HttpSessionListener, ServletContextListener, ServletRequestListener

Описание: Java Web application to demonstrate / apply all 3 listeners ( HttpSessionListener, ServletContextListener, ServletRequestListener ) on 61HttpSessionWithCookiesApp2 (Tutorial No.196):
Operations:
1) To keep track of each request processing duration/time.
2) To keep track of each clients session duration/time.
3) To keep track of the deployment & undeployment timings of web application.

Step 1) Keep 61HttpSessionWithCookiesApp2 web application ready in Server of Previous Tutorial No. 196

Create table:
create table info(name varchar(20), addr varchar(40), age varchar(2),
exp varchar(2), skills varchar(20), city varchar(20), salary varchar(10));
63ServletListenersApp1: (DDS)
----------------------
|--------personal.html
|--------WEB-INF
|--------web.xml
|--------classes
| |--------FirstServlet.java/.class
| |--------SecondServlet.java/.class
| |--------ThirdServlet.java/.class
| |--------MySessListener.java/.class
| |--------MyScListener.java/.class
| |--------MyReqListener.java/.class
|
|---------lib
|----(ojdbcVersion.jar for Oracle or MySqlconnectorVersion.jar for mysql etc.)

Add the *.jar (Mysql)

Step 2) Develop 3 user-defined Listener class under WEB-INF/classes directory of 63ServletListenersApp1 web application.

Step 3) Add MySessListener.java class to classes folder.

Step 4) Add MyScListener.java class to classes folder.

Step 5) Add MyReqListener.java class to classes folder.

Step 6) Configure above 3 listeners classes in web.xml file

Step 7) Test the web application & observe current days log file in tomcat-home/logs/localhost.date.txt file


Test Web Application:
---------------------
http://localhost:8080/63ServletListenersApp1/personal.html

Do observe session id for different browsers

Observe tomcat server console messages

INFO: /furl has taken 8 Milliseconds to processs a request
INFO: /surl has taken 4 Milliseconds to processs a request
INFO: /turl has taken 804 Milliseconds to processs a request

INFO: /63ServletListenersApp1 webapplication is in running mode for 172438 Milliseconds


Do observe the output.


INFO: /furl has taken 12 Milliseconds to processs a request

INFO: /surl has taken 15 Milliseconds to processs a request

INFO: /turl has taken 754 Milliseconds to processs a request

INFO: /63ServletListenersApp1 webapplication is undeployed/reloaded/stopped at Thu Apr 30 13:26:12 IST 2020

INFO: /63ServletListenersApp1 webapplication is in running mode for 316464 Milliseconds

INFO: /63ServletListenersApp1 webapplication id depolyed/restarted/reloaded at Thu Apr 30 13:26:12 IST 2020