Custom data validator, or user-configurable validator is the mechanism that allows users to define their own validation rules. For example, the username must be lowercase, or shorter than 20 characters. In eXo Platform, there are 6 validators that administrators can configure to use, and the architecture allows developers to add more validators as they wish.
The validators can be configured via properties in the
configuration.properties file in:
$PLATFORM_JBOSS_HOME/standalone/configuration/gatein/ in JBoss package.
$PLATFORM_TOMCAT_HOME/gatein/conf/ in Tomcat package.