JAIN SLEE is the specification for a Java Service Logic and Execution Environment (SLEE)

architecture, done in Java Community Process (JCP) by several individuals and companies,

including Red Hat. A SLEE is an application server, or service container, which defines a

component model for structuring the logic of communications services as a collection of reusable

components, and for composing these components into even more sophisticated services. This

model was designed and optimized for event driven applications.