How to inject external configuration into web dynpro application

Hi colleagues,
I've a web dynpro application, which has some hard coded hostnames in the source code.
All hard coded hostnames should be moved to some else place, either engine parameters or external configuration file.
Searching over the project, hard coded hostnames were found in following file types:
- wdmodel files
- properties files
- java files
How to inject external configured hostnames into web dynpro applications, especially wdmodel and property files? Are threre best practices?
Thanks for any hint!
Best regards
Daniel

property file is supposed to do that job, you can configure the value at nwa after the application is deployed.
Configuring a Web Dynpro Application (Java) - IT Scenarios at a Glance - SAP Library

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How to inject external configuration into web dynpro application

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