What is the difference between the following methods?

Question

What is the difference between the following methods?

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#1 by (2 votes)

2

I'm developing an application in JSF and I came across the following methods and want to know the difference between them.

((HttpSession)FacesContext.getCurrentInstance()
                     .getExternalContext().getSession(false)).invalidate();

and

FacesContext.getCurrentInstance().getExternalContext().invalidateSession();

java jsf-2.2

asked by anonymous 29.03.2015 / 19:03

1 answer

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score 2 · Accepted Answer

The two code snippets perform the same action, which is to invalidate a session.
The difference is in what class comes the method. invalidate is from class HttpSession , invalidateSession is of class ExternalContext . Note that in the code snippet that you use invalidate you are doing a casting session retrieved from FacesContext to HttpSession so that you can access the method. It is interesting to add that the implementation of invalidateSession will only execute invalidate of HttpSession .