I am looking for a solution that can be run on a continuous integration server (TeamCity) which seems to rule out IDE specific solutions like the externalization that is built into eclipse.
I need to generate warnings when strings are found in the java source files, unless they have been somehow flagged (by comment or annotation) as not requiring internationalization, eg the // $NON-NLS-1$ comment for eclipse.
The code is built using maven in teamcity.
I have not been able to find existing solutions or any ideas on how a custom solution might be hooked into either maven or teamcity (note I am not hugely familiar with either so could be overlooking something fairly obvious).
It seems that you need some specifically crafted Static Code Analysis tool.
I am afraid that no such thing exists yet (or I should say no such thing is available for public use...). I am not sure if you would be able to create warnings from the tool though. I know it would be possible with Gradle, but integrating Gradle task with Java code is not an easiest thing to do (BTDT).
Maybe some simple HTML report would do? In this case, you can simply use Scanner with regular expressions that matches all the strings literals... That is unless you'll find exclusions (another RegExp) in the same line. That's pretty basic thing to do.