Nova Ordis Utilities Environment Variable Support: Difference between revisions
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=Overview= | =Overview= | ||
We install a static EnvironmentVariableProvider per class loading domain (JVM), to allow for environment-independent testing. | |||
=Usage Pattern= | |||
<pre> | |||
... | |||
EnvironmentVariableProvider p = EnvironmentVariableProvider.getInstance(); | |||
... | |||
<pre> | |||
* @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. | |||
Revision as of 16:59, 20 December 2016
Internal
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.