The supports environment variable substitution inside Dropwizard configuration files In the example applications environment variable substitution is used for We can see this in action by running the command with and without the environment variable set EnvironmentConfigBundle defaultName template Hello %s defaultName $ DW_DEFAULT_NAME Stranger render $ java jar target liftwizard example 0 1 0 jar render example yml include default INFO 2020 05 02 03 07 41 910 com example helloworld cli RenderCommand DEFAULT > Hello Stranger $ DW_DEFAULT_NAME EnvSubstitution java jar target liftwizard example 0 1 0 jar render example yml include default INFO 2020 05 02 03 08 05 685 com example helloworld cli RenderCommand DEFAULT > Hello EnvSubstitution

@Override public void initialize Bootstrap<HelloWorldConfiguration> bootstrap Enable variable substitution with environment variables bootstrap setConfigurationSourceProvider new SubstitutingSourceProvider bootstrap getConfigurationSourceProvider new EnvironmentVariableSubstitutor false

lives in the module @Override public void initialize Bootstrap<HelloWorldConfiguration> bootstrap bootstrap addBundle new EnvironmentConfigBundle EnvironmentConfigBundle liftwizard bundle environment config <dependency> <groupId>io liftwizard< groupId> <artifactId>liftwizard bundle environment config< artifactId> < dependency>