Class EnvironmentPropertySource

java.lang.Object
org.apache.tomcat.util.digester.EnvironmentPropertySource
All Implemented Interfaces:
IntrospectionUtils.PropertySource
public class EnvironmentPropertySource extends Object implements IntrospectionUtils.PropertySource
A IntrospectionUtils.PropertySource that uses environment variables to resolve expressions.

Usage example:

Configure the certificate with environment variables. 
  
    <SSLHostConfig>
          <Certificate certificateKeyFile="${CERTIFICATE_KEY_FILE}"
                       certificateFile="${CERTIFICATE_FILE}"
                       certificateChainFile="${CERTIFICATE_CHAIN_FILE}"
                       type="RSA" />
    </SSLHostConfig>
How to configure: 

  echo "org.apache.tomcat.util.digester.PROPERTY_SOURCE=org.apache.tomcat.util.digester.EnvironmentPropertySource" >> conf/catalina.properties
or add this to CATALINA_OPTS 

  -Dorg.apache.tomcat.util.digester.PROPERTY_SOURCE=org.apache.tomcat.util.digester.EnvironmentPropertySource
NOTE: When configured the PropertySource for resolving expressions from system properties is still active.
See Also: