bdemers commented on a change in pull request #82:
URL: https://github.com/apache/shiro-site/pull/82#discussion_r634409994
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File path: configuration.md.vtl
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@@ -342,6 +343,26 @@ anObject.map = $objectKey1:$objectValue1,
$objectKey2:$objectValue2
...
```
+<a name="Configuration-VariableInterpolation"></a>
+#[[######Variable Interpolation]]#
+
+You can use variable interpolation when defining values. Supported types are
environment variables, system properties and constants.
+
+For constants, use `${const:CONSTANT_NAME}`, for environment variables and
system properties, use `${ENV_VARIABLE_NAME}` or ${`PROPERTY`}.
Review comment:
```suggestion
For constants, use `${const:com.example.YourClass.CONSTANT_NAME}`, for
environment variables and system properties, use `${ENV_VARIABLE_NAME}` or
`${system.property}`.
```
Use fully qualified name for const example, and lower case for system
properties, as that is _normally_ the convention
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