Which among the servlet objects are synchronized

[Ananda Sen]

Among the servlet objects, like request, response, session, ServletContext, ServletConfig etc. which are synchronized?

[avi sinha]

Ananda Sen wrote:Among the servlet objects, like request, response, session, ServletContext, ServletConfig etc. which are synchronized?

i didn't understand your question. are you talking about the paramerters , variables etc currently held by these objects ???

avi sinha

[Ulf Dittmer]

Objects are not synchronized - code is. You can generally find information about what is and isn't synchronized (or what is or isn't thread-safe to do) in the javadocs of a class.

Note that web apps are not thread-safe unless you make them so in your code.

[Charles 'King]

Ananda Sen wrote:Among the servlet objects, like request, response, session, ServletContext, ServletConfig etc. which are synchronized?

As stated above look at the api docs.

Here's an example on how to make ServletContext attributes thread safe. You must lock your ServletContext if you want to guarantee thread safety:

synchronized(getServletContext())
{
	getServletContext().setAttribute(“email”,”[e-mail]”);
}

[avi sinha]

Thread safe attributes or variables :

1> local variables within the service methods
2> request attributes

3> request parameters
4> servlet or context init-params etc

actually everything which can't be changed in a program are thread safe . 3 and 4 are just examples which i have added as they are frequently asked in mock exams.



avi sinha