ExtConfig.groovy

import javax.naming.Context
import javax.naming.InitialContext
import javax.naming.NamingException
 
class ExtConfig {
  public ExtConfig() {
  }
 
  public String find(String key) {
    String path = findJndiEnvVar(key)
    if(!path) {
      path = System.getenv(key)
      if(!path) {
        path = System.getProperty(key)
      }
    }
    return path
  }
 
  private String findJndiEnvVar(String key) {
    try {
      def ctx = (Context) new InitialContext().lookup('java:comp/env')
      return ctx.lookup(key)
    }
    catch(NamingException e) {
      // not found, carry on
      return null
    }
  }
}