Appendix D. Profile Property Resolvers
Abstract
When defining properties for a profile, you can use a variable substitution mechanism, which has the general syntax
${ResourceReference}. This variable substitution mechanism can be used in any profile resource, including the agent properties, PID properties, and other resources—for example, the mq-base profile's broker.xml resource references the ${broker.name} and ${data} variables.
D.1. Substituting system properties
Syntax
System properties can be substituted in a profile resource, using the following syntax:
${PropName}
Where
PropName can be the name of any Java system property. In particular, Java system properties can be defined in the following locations:
- The
etc/system.propertiesfile, relative to the container's home directory. - System property settings in the profile's agent properties.
Some of the more useful system properties defined in the
etc/system.properties file are, as follows:
| System Property | Description |
|---|---|
${karaf.home} | The directory where Apache Karaf is installed. |
${karaf.data} | Location of the current container's data directory, which is usually ${karaf.home}/data for a main container or ${karaf.home}/instances/InstanceName/data for a child container. |
${karaf.name} | The name of the current container. |
