Interface ConfigurableEnvironment

All Superinterfaces:
ConfigurablePropertyResolver, Environment, PropertyResolver
All Known Subinterfaces:
All Known Implementing Classes:
AbstractEnvironment, MockEnvironment, StandardEnvironment, StandardServletEnvironment

public interface ConfigurableEnvironment extends Environment, ConfigurablePropertyResolver
Configuration interface to be implemented by most if not all Environment types. Provides facilities for setting active and default profiles and manipulating underlying property sources. Allows clients to set and validate required properties, customize the conversion service and more through the ConfigurablePropertyResolver superinterface.

Manipulating property sources

Property sources may be removed, reordered, or replaced; and additional property sources may be added using the MutablePropertySources instance returned from getPropertySources(). The following examples are against the StandardEnvironment implementation of ConfigurableEnvironment, but are generally applicable to any implementation, though particular default property sources may differ.

Example: adding a new property source with highest search priority

 ConfigurableEnvironment environment = new StandardEnvironment();
 MutablePropertySources propertySources = environment.getPropertySources();
 Map<String, String> myMap = new HashMap<>();
 myMap.put("xyz", "myValue");
 propertySources.addFirst(new MapPropertySource("MY_MAP", myMap));

Example: removing the default system properties property source

 MutablePropertySources propertySources = environment.getPropertySources();

Example: mocking the system environment for testing purposes

 MutablePropertySources propertySources = environment.getPropertySources();
 MockPropertySource mockEnvVars = new MockPropertySource().withProperty("xyz", "myValue");
 propertySources.replace(StandardEnvironment.SYSTEM_ENVIRONMENT_PROPERTY_SOURCE_NAME, mockEnvVars);
When an Environment is being used by an ApplicationContext, it is important that any such PropertySource manipulations be performed before the context's refresh() method is called. This ensures that all property sources are available during the container bootstrap process, including use by property placeholder configurers.
Chris Beams
See Also: