New in JBoss Enterprise Web Platform 5 are a set of TransactionSticky load balance policies. These extend the standard policies above to add behavior such that all invocations that occur within the scope of a transaction are routed to the same node (if that node still exists). These are based on the legacy detached invoker architecture, so they are not available for AOP-based services.

Each of the above is an implementation of a simple interface; users are free to write their own implementations if they need some special behavior. In later sections we'll see how to configure the load balance policies used by different services.