If the default rule classes provided with the risk firewall do not meet your needs you can implement a custom rule class. Implementation of a custom rule class is accomplished by using a com.apama.firewall.RuleClassFactory to create a com.apama.firewall.RuleClass object. You then override the default action implementations in your RuleClass object with actions that provide the rule class logic you need. After you create a custom rule class, you register it with a risk firewall. You can then add instances of your custom rule class just as you would add instances of a default rule class.