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Web services architecture

 
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Hello Experts,

I need some opinion and inputs on the architecture I am suggesting to my project as below.

I have an UI built using HTML/JavaScript which will be hitting database in following manner -

UI (JSON over HTTPS) >> [Web Tier: JSON to Java Objects > Spring MVC (front controller) > Web Service Client] >> [App Server: Web Service > Authenticate > App Service] >> [DAO > DB]
UI (JSON over HTTPS) >> [Web Tier: JSON to Java Objects > Spring MVC (front controller) > Web Service Client] >> [App Server: Web Service > Authenticate > App Service > Web Service Client] >> [ESB: Web Services with business logic] >> [DAO > DB]

Requirements:
1) The business logic needs to be on web services on ESB so that other system can reuse them
2) App service can be wrapped under Web Service to be able to use by other systems if required.


Please let me know if this architecture has any issues or can be improvised...many thanks in advance!!
 
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