Java definitions 1

[toyt78]

What is the difference between J2EE, WebSphere and Tomcat?

Is Tomcat equal to a Web Server sort of like IIS is a Web Server?
Is WebSphere equal to a Server? And is it really called BEA WebShere?
J2EE is the JVM edition?

 

[sedj]

J2EE is a specification, and extension to the standard Java spec, know as J2SE.
Websphere and Tomcat are server implementations.

WebSphere is a J2EE server that conforms to the J2EE spec, and generally contains an EJB container, a servlet container, and other J2EE related services. BEA make WebSphere.

Tomcat is a servlet container, not a full J2EE server.

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[timw]

My understanding :-

J2EE - Java 2 Enterprise Edition
It's a collection of APIs and standards which go beyond the functionality of the Standard Edition (J2SE).

Tomcat
A 'container' used to run JSP and Servlets. Also acts as a web-server to serve up pages and service reequests for the JSPs and Servlets.

WebSphere
An Application Server from IBM. Basically a collection of containers (eg. Web container and EJB container) and services which form a deployment platform for J2EE based applications. All J2EE Application Servers must provide a Sun-specified set of containers/services to qualify.

And is it really called BEA WebShere?

... I don't think so. I've heard of BEA WebLogic, which is a competitor's offering.

Tim
---------------------------
"Your morbid fear of losing,
destroys the lives you're using." - Ozzy

 

[sedj]

Ooops, yes BEA make WebLogic, IBM make Websphere.

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http://www.primrose.org.uk

 

[prosper]

IBM makes websphere
BEA makes weblogic

 

[sedj]

Did I not just say that prosper ?

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Free Database Connection Pooling Software

http://www.primrose.org.uk

 

[toyt78]

Thanks, I assume Tomcat does not have an EJB container?

Also, What is the best Web Server (WebSpere, WebLogic, Tomcat) for a beginner to use?

 

[sedj]

Tomcat is a servlet container - which is neither a J2EE server, nor an EJB container.

J2EE servers have servlet containers in them - eg JBoss ships tomcat as its servlet container I believe.

WebSphere and WebLogic I think you have to pay for (unless they've changed it).

If you want to learn J2EE, I'd use JBoss, or maybe the upcoming Apache's Geronimo.

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http://www.primrose.org.uk

 

[toyt78]

Thanks

 

[Diancecht]

I'd also have care with the "Web Server" concept.

Apache is a Web Server, that just serves static content (html, css, js and so on). The other things are Application Servers (WAS, ...)

Anyway, from my experience the word "server" suits for everything, as long as you have your concepts clear.

Cheers,

Dian

 

[sedj]

Actually, it seems JBoss no longer ships Tomcat, but ships Jetty instead, as does Geronimo - sorry for any confusion ....

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