Best connection process for oracel ADF?

hi all,
i am using oracle jdeveloper 11g 2 release and oracle database 10g. now i used database connecion in choosing Application resource type. i need to know what is the best way for connect with db? is it db connection ,JMX, URL, or WebDAV? because of i am going to make finally enterprise software for large company(4000 users use) .so number of users need to keep their connection because they are in different location. therefore show me what is the best path for keeping connection with oracle db? There is no any web service. so show me is there any connection method, because of timeout can be happen, server has poor connection?
thankx. all the best.

dear friend ,
ADF mean it is a framework(Application development framework). which is developed for java developers. earlier in oracle jdeveloper 10g used for development.now jdeveloper 11g has this feature.which is same to oracle forms,but it hasn't rports.it has jsf page(java sever face).jsp mean java server page. in adf both include but jsp is in jspx.java serve page xml.
read these lines:-
http://docs.oracle.com/cd/E18941_01/tutorials/jdtut_11r2_58/jdtut_11r2_58_1.html
http://www.oracle.com/technetwork/developer-tools/jdev/overview/index-100269.html
http://www.oracle.com/technetwork/developer-tools/adf/overview/index.html
http://www.oracle.com/technetwork/developer-tools/adf/learnmore/june2012-otn-harvest-1683085.pdf

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