In Java EE 7's Firstcup tutorial, why does does the web tier consume the data from the dukes-age web service?
In the Firstcup tutorial, the responsibilities of the web tier are listed as:
dynamically generate content for the client
collect input from the user
return results from business tier components
control the flow of client screens & pages
maintain session state
perform basic logic
hold data temporarily in JavaBeans components
Which of these responsibilities would retrieving data from a web service fall under?
The tutorial also lists the technologies used in the web tier, and JAX-RS is not included in that list. The list of technologies used by the business tier does, however, list JAX-RS. I was surprised to find the DukesBDay JavaBeans component (in the web tier) calling the dukes-age web service, instead of the DukesBirthdayBean EnterpriseBean (in the business tier), which uses hard coded value for Duke's birth date.
Is it typical for the web tier to consume web services in this way? What about when using an application client container, wouldn't that skip the web tier altogether, and in doing so also skip the web service call? Wouldn't DukesBirthdayBean in the business tier benefit from making the call to the web service, instead of having the date hard coded into it, and wouldn't this also solve the problem of the missing web service call when using an application client container?
Hi Shadab,
Here is a list of Web service standards supported by SAP in NetWeaver 7.1.1: [Supported Standards|http://help.sap.com/saphelp_nwpi711/helpdata/en/44/624479f7e608fae10000000a422035/frameset.htm] (also in [7.0|http://help.sap.com/saphelp_nw70/helpdata/EN/44/624479f7e608fae10000000a422035/frameset.htm] and [7.0.1|http://help.sap.com/saphelp_nw70ehp1/helpdata/EN/44/624479f7e608fae10000000a422035/frameset.htm]). The Enterprise Services adhere to these standards, and on the provider side you have the tools to configure the authentication settings as needed. On the consumer side, one just has to use a Java release (or any other platform) that supports these standards.
While I am not a Java developer, there should be [many ways to consume a Web service in Java|http://www.google.bg/search?q=consumewebservice+java].
Hope this helps,
Rossen
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Go to Solution.
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TEMP.vi 25 KBIt took me some time to figure what you are trying to do but I think I have it now.
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Ben
Message Edited by Ben on 05-05-2010 01:31 PM
Ben Rayner
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