Re: Differnce between Java Bean and Enterprise Java Bean
From: Tom Cole (tcole6_at_earthlink.net)
Date: 01/21/04
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Date: Wed, 21 Jan 2004 03:06:21 GMT
"Markku Salminen" <markku.salminen@pp.inet.fi> wrote in message
news:PEgPb.2935$L05.669@read3.inet.fi...
>
> > I am a new user of Java. Please ans the followings. I would really
> > appriciate.
> >
> > 1. Is there any difference between Java Bean and Enterprise Java
Bean(EJB),
> > if so, what is/are those?
>
> They are totally different. Bean is just a class with private
> attributes handled with get and set methods. EJB's are
> server components.
No correlation at all. Enterprise Java Bean was probably not the best name
for those, seeing the JavaBean came first...
>
> > 2. As a programmer point of view, is there any difference between tomcat
and
> > WebSphere or JBoss?
>
> It depends what are you doing? If you want to learn how to develope
> the enterprise applications then JBoss is good choise. WebSphere is
> commercial product.
>
Tomcat is a Servlet container. It serves Servlets and JSP content. It does
not server EJBs.
JBoss is an application server, it serves EJBs. It does not serve Servlets
or JSPs. (At least I don't believe it does. Never tried it. They provide a
pre-wired version with Tomcat or Jetty as the servlet container).
The typical web application environment would utilize both Tomcat (or Jetty
or other Servlet container) and JBoss (or JoNaS, or Enhydra or other
application server) as well as an http server like Apache or IIS, each piece
doing it's thing: Apache/IIS --> static content; Tomcat --> Servlets & JSP;
JBoss --> EJBs.
> --
> Markku
>
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