Nova Ordis Utilities Environment Variable Support

Internal

• novaordis-utilities

Overview

We install a static EnvironmentVariableProvider per class loading domain (JVM), to allow for environment-independent testing.

Usage Pattern

...
EnvironmentVariableProvider p = EnvironmentVariableProvider.getInstance();
...

    * @return the default EnvironmentVariableProvider for this JVM. If "env.variable.provider.class.name" (the exact
    * string is defined by ENVIRONMENT_VARIABLE_PROVIDER_CLASS_NAME_SYSTEM_PROPERTY) is defined and points to a fully
    * qualified class name that implements EnvironmentVariableProvider, it will be instantiated, cached and used.
    * If the system property is not defined, SystemEnvironmentVariableProvider will be used.
    *
    * @exception IllegalStateException if failure to instantiate the custom class is encountered.