Implement pooling of JSE endpoints

I appears that when using a POJO endpoint that the POJO is instantiated each time a web method is called. I looked around for a way to define a pool for the POJO, but could not find one. I would have thought that POJO endpoints would be pooled automatically much the same way servlets and EJBs are pooled. Is there as way to pool POJO endpoints, or should I look into some other mechanism?