<property name="myProperty" value="myJndiKey" />

<!-- it does not work: -->
<insertFromJNDI env-entry-name="java:comp/env/${myProperty}" as="myJndiValue" />
<!-- result: ...InsertFromJNDIAction - [java:comp/env/${myProperty}] has null or empty value -->

<!-- it works: -->
<property file="${myProperty}myPropFile.properties" />
<!-- result: myJndiKeymyPropFile.properties -->