Package io.fluxcapacitor.common.application

Enum Class EnvironmentVariablesSource

java.lang.Object

java.lang.Enum<EnvironmentVariablesSource>

io.fluxcapacitor.common.application.EnvironmentVariablesSource

All Implemented Interfaces:

PropertySource, Serializable, Comparable<EnvironmentVariablesSource>, Constable

public enum EnvironmentVariablesSource
extends Enum<EnvironmentVariablesSource>
implements PropertySource

A PropertySource that resolves property values from system environment variables.

This source accesses environment variables via System.getenv(String) and can be used to inject configuration values directly from the host operating system or container runtime.

This is typically used to override configuration in deployment environments without modifying application-specific property files.

Example usage

 export FLUX_API_TOKEN=secret-token
 

In your application:

 flux.api.token = ApplicationProperties.get("FLUX_API_TOKEN")
 

This source is usually combined with others (like ApplicationPropertiesSource) in a layered configuration strategy where environment variables take precedence.

See Also:

• System.getenv(String)
• ApplicationPropertiesSource
• JavaPropertiesSource

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
INSTANCE

Field Summary

Fields inherited from interface io.fluxcapacitor.common.application.PropertySource

substitutionPattern

Method Summary

Modifier and Type	Method	Description
String	get(String name)	Retrieves the value of the given property name from the system environment.
static EnvironmentVariablesSource	valueOf(String name)	Returns the enum constant of this class with the specified name.
static EnvironmentVariablesSource[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface io.fluxcapacitor.common.application.PropertySource

andThen, containsProperty, get, getBoolean, getBoolean, require, substituteProperties

Enum Constant Details

INSTANCE

public static final EnvironmentVariablesSource INSTANCE

Method Details

values

public static EnvironmentVariablesSource[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static EnvironmentVariablesSource valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null

get

public String get(String name)

Retrieves the value of the given property name from the system environment.

Specified by:

get in interface PropertySource

Parameters:

name - the name of the environment variable

Returns:

the value, or null if the variable is not defined