Each WildFly Swarm application may contain a text file at one of the following locations:

  • /usage.txt

  • /META-INF/usage.txt

  • /WEB-INF/usage.txt

If found, once the application has fully started, then the file will be logged with variable substitution from the configuration properties.

Variable substitution

Variables within the usage.txt file of the format ${swarm.thing} will be replaced with their current value. This may be useful for display the currently active port used by the application, for instance by having content such as:

The application is now ready on ${swarm.http.port}!

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