How can I pass a system properties file to GWT?

Question

Is there a system property or a program argument that I can use to pass the name of a properties file to GWT, to tell GWT to load these into the system properties?

I'm trying to change something like this:

com.google.gwt.dev.GWTShell -Dsysprop1=value1 -Dsysprop2=value2 ...

to something like this:

com.google.gwt.dev.GWTShell -Dgwt.system.properties=/my/properties/file ...

The motivation is to be able to change easily between sets of properties according the runtime environment, for example so that I can have dev.properties and prod.properties property without having to set the properties individually on the startup command.

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Aside: there are two other options that will work, but which I'd like to avoid for now:

• adding a layer of indirection through which to pick up all of the system properties (because this will be a pain to retrofit)
• adding a bootstrapper to load the property set before delegating everything GWT (because I'm lazy, though this might be a reasonable longer term option if GWT doesn't support this out of the box).

Answer 1

There's a great example of how to do this using GWT Generators here.