Please clarify a few points concerning Java Servlets

Posted by EugeneP on Stack Overflow See other posts from Stack Overflow or by EugeneP
Published on 2010-05-07T16:25:06Z Indexed on 2010/05/07 16:28 UTC
Read the original article Hit count: 195

Filed under:

java

|

servlets

|

tomcat

suppose, I use Tomcat as a web container.

Is it true that once all the servlets found in a web-app/WEBAPPNAME

are init(IALIZED) then every change of a Servlet's property will be seen to every session.

So session 1 changes a property userName of a Servlet1 from "user1" to "user2"

session 1 is closed.

session 2 starts. It will see "user2" as the only value of Servlet1.userName property??

Any change of a Servlet's field will be seen to all subsequent sessions?

Are servlets singletons, aren't they?

© Stack Overflow or respective owner

Related posts about java

Tomcat 6: Access Control Exception?

as seen on Server Fault - Search for 'Server Fault'
I'm trying to setup a tomcat6 server, and I'm trying to match another setup someone else established. However, my deployment (default Ubuntu install) uses a policy.d/ directory structure, and the established server just uses a catalina.policy file. I've tried setting every entry in policy.d to match… >>> More
Problem in creation MDB Queue connection at Jboss StartUp

as seen on Stack Overflow - Search for 'Stack Overflow'
I am not able to create a Queue connection in JBOSS4.2.3GA Version & Java1.5, as I am using MDB as per the below details. I am putting this MDB in a jar file(named utsJar.jar) and copied it in deploy folder of JBOSS, In the test env. this MDB works well but in another env. [ env settings and… >>> More
failing to establish connection between Postgres db and gwt

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I am using Postgres and gwt 2.0 for one of my applications. I am facing problem connecting to the database. When I try to connect it gives "ClassNotFoundException". Here is what I get when I try to connect to database: java.lang.ClassNotFoundException: org.postgresql.Driver at java.net… >>> More
failing to establish connection between postgre db and gwt

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, For i am using postgre and gwt 2.0 for one of my applications. I am facing problem connecting to the database. When i try to connect it gives "ClassNotFoundException". Here is what i get when i try to connect to database: java.lang.ClassNotFoundException: org.postgresql.Driver at java.net… >>> More
Migration and deployement problems JBoss 4.2.2.GA to JBoss 6.0.0.M2

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I'm trying to migrate an application running on JBoss 4.2.2.GA to JBoss 6.0.0.M2 I give you some log to explain my problem : boot.log : 2010-03-16 09:59:29,406 ERROR [org.jboss.system.server.profileservice.ProfileServiceBootstrap] (Thread-2) Failed to load profile: Summary of incomplete deployments… >>> More

Related posts about servlets

Servlets vs Spring MVC??

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi All, I very often come across this question of why we have got lots of web frameworks addressing the same or similar drawbacks. when looking deeply, i also have given thought on why JSP / Servlets is not being used after the other web frameworks (like Struts, Spring MVC etc) have shown their… >>> More
Servlets vs MVC frameworks

as seen on Stack Overflow - Search for 'Stack Overflow'
I very often come across this question of why we have got lots of web frameworks addressing the same or similar drawbacks. When looking deeply, I also have given thought on why JSP / Servlets is not being used after the other web frameworks (like Struts, Spring MVC etc) have shown their existence… >>> More
stoping doGet/dopost in java servlets ?

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello everyone, I've been playing with Java Servlets and Ajax a bit, and I've got a situation on which I would really appreciate advice. Let's say I have HTML page with a start and stop buttons, and as a result of clicking start button, overridden doGet (or doPost) method on a servlet is invoked… >>> More
Servlet stops working on Tomcat server after some hits or time

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a very strange issue with some of my servlets. Below is my configuration: Folder A has X number of servlets deployed in Tomcat directory Folder B has Y number of servlets deployed in Tomcat directory After certain amount of time or hits to any of the servlets in Folder B, it stops working… >>> More
Best-selling Author on Servlets and JSP, Marty Hall, to Keynote at GIDS 2010

as seen on Dot net Slackers - Search for 'Dot net Slackers'
Hey Guys,Author of More Servlets and JSP, Marty Hall is coming to Bangalore this April to speak on Choosing an Ajax/JavaScript Toolkit: A Comparison of the Most Popular JavaScript Libraries, Pure Java Ajax: An Overview of GWT 2.0, Integrated Ajax Support in JSF 2.0 and Ajax Support in the Prototype… >>> More