protected static UpdateConfigurationPolicy getUpdateConfigurationPolicy(Map<String, String> commandParameters) {
    String stringValue = getCommandParameterValue(commandParameters, UPDATE_CONFIGURATION_POLICY);
    UpdateConfigurationPolicy value = UpdateConfigurationPolicy.translate(stringValue);

    // Return UpdateConfigurationPolicy.ALL as a default value
    return (value == null) ? UpdateConfigurationPolicy.ALL : value;
  }
Given a (command parameter) Map, attempts to safely retrieve the "update_configuration_policy" property.

@param commandParameters a Map containing the dictionary of data to interrogate
@return a UpdateConfigurationPolicy
ambari-server/src/main/java/org/apache/ambari/server/serveraction/kerberos/KerberosServerAction.java