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I developed a web application in spring boot which can deployed from a webserver in tomcat and connects to database server directly.But now I have to switch to a another database which is not accessible from the webserver.So I was advised to follow the pattern 

Web Server -> App Server -> Database Server

But I am not sure How to convert my web app into this format.Becuse current my format is 

Web Server -> Database Server

Could anyone explain how to implement this.Any help is appreciated?

1 Answers1

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You have some misunderstanding with Web Server and Application Server. Read more at What is the difference between application server and web server?

The communication structure would be something like

Edge Server -> Internal Server -> Database

Now, your problem can be resolved by moving your current api to internal server which can directly connect to DB and create a pseudo api in Edge Server which just calls the api from Internal Server and sends response back to the client.

Pseudo API -> Actual API -> Database

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Avinash
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  • As you mentioned in the link My Previous Scenario is ***Scenario 1: Web server without an application server*** and I have to switch that to ***Scenario 2: Web server with an application server***.So I will be having to intoduce a business model in My Application.Am I correct? –  Mar 02 '17 at 09:00
  • I didn't understand your question, are you just introducing just a reverse proxy or what? – Avinash Mar 02 '17 at 09:31
  • in case of just reverse proxy check this http://stackoverflow.com/questions/224664/difference-between-proxy-server-and-reverse-proxy-server – Avinash Mar 02 '17 at 09:33
  • I have doubt that now I have to run two apps where –  Mar 06 '17 at 04:13