Adaptative web service or EJB ?

Question

Hi everybody,
I want consume a web service from  a system SAP R/3.
Apparently, we can consume with component EJB ...
What is the difference between a adaptative web service and EJB ?
More security with EJB ?
Thanks
Rodolphe.

Answer 1

Hi,
We use for ejbs when we have to store data in database..
if ejbs r like a medium for data transfer..where session bean contain ur business logic..
u cn use webdynpro interface as well as jsp interface wid ejb..
if u r using ejb u'll have to create an ejb projct first then u'll hav to create java proct which will contain ur wrapper class for fields.later on u'll have to create one application project tht wud b an Ear projct.nw u create a web service for session bean ..aftr doin this all u can test webservice which will b executed for ur business method.
for more security u can use ejb security model :[http://java.sun.com/j2ee/tutorial/1_3-fcs/doc/Security.html]
Web services r created for session bean..so that u cn directly access ur methods via url..
for a detailed description of web service go through :- [http://help.sap.com/saphelp_nw04/helpdata/en/d6/f9bc3d52f39d33e10000000a11405a/content.htm]
for ejb project go through this1 :[https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/ca4a9c90-0201-0010-c389-8738cd51a88e]
Regards,
Khushboo