When wil use singleton class in Struts
- 7 Answers
- 16287 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / dsr
The Action classes are singleton classes that are
instantiated once per class type per JVM, and all requests
for a specific action are routed through the same Action
class instance.
| Is This Answer Correct ? | 21 Yes | 7 No |
Answer / avani
Struts will create a single instance of the Action and
allow multiple threads to invoke execute(). This allows for
faster request processing, as the framework is not
continually creating new Action instances to handle each
request. But because a single object is shared between
multiple threads, you must observe proper threading
considerations, as other threads are likely to pummel
instance variables that hold state in the action.
| Is This Answer Correct ? | 10 Yes | 2 No |
Sorry,
I posted the wrong answer Multiple instances of Action
Classes will create for each request. It will not create
multiple instances of Action class,
It will create only single object and uses that object
| Is This Answer Correct ? | 3 Yes | 0 No |
Answer / harikrishna rapuri
Suppose if u give more 300 requests at a time struts based
webapplication,in that time some servers(tomcat..etc)
creates another ActionServlet object .This is violation of
the Servlet Specification(Servlet behavior is single
instance and multi therading).So that struts frame work
designers use Actionservlet as a Sigleton class.
| Is This Answer Correct ? | 5 Yes | 2 No |
No, It will create Instance of Action Class for each
request, internally it will use Single-ton Design pattern
for the ActionServlet.
In Action class we will actully write business logic, so
Action class is not SingleTon only ActionServlet is singleton
| Is This Answer Correct ? | 3 Yes | 2 No |
Answer / nikel
In struts 1.x version Action class follows Single Instance Multiple Threaded model.hence WebContainer creates object for a Action class per Session basis.so Action class is not ThreadSafe.But we can make it ThreadSafe by Synchronization mechanism.
But in Struts 2.x version Action class obj is created by WebContainer per request basis.So Action class is always threadsafe.
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / vitthal
Hi guys please help me !
I am developing struts 2 web application, i have problem about ACTION class object creation ,here ACTION class object create for every new request .How can i avoid this process
| Is This Answer Correct ? | 0 Yes | 0 No |
what is the difference between ServletContext and ServletConfig?
How do you know what to give for the "path " under in struts-config.xml ?
When it’s useful to use IncludeAction?
what are the disadvantages of MVC architecture
how the error can be showed in the jsp page in struts?
is it possible to see actionservlet in my system. if yes how
What does action do in struts?
what is purpose cvs and vss in eclipse?
What is the life cycle of actionform?
What is the use of web xml in struts2?
Why aren’t the struts tags maintained as part of the jakarta taglibs project ?
Hai all.What is the use of <logic:iterate>tag in struts application.
Core Java 
