Composite ENTITY pattern is used in EJB persistence mechanism. A Composite entity is an EJB entity bean which represents a graph of objects. When a composite entity is updated, internally dependent objects beans get updated automatically as being MANAGED by EJB entity bean. FOLLOWING are the participants in Composite Entity Bean.

• Composite Entity - It is primary entity bean. It can be coarse grained or can CONTAIN a coarse grained object to be used for persistence purpose.
• Coarse-Grained Object - This object CONTAINS dependent objects. It has its own life cycle and also manages life cycle of dependent objects.
• Dependent Object - Dependent object is an object which depends on coarse grained object for its persistence lifecycle.
• Strategies - Strategies represents how to implement a Composite Entity.

Composite Entity pattern is used in EJB persistence mechanism. A Composite entity is an EJB entity bean which represents a graph of objects. When a composite entity is updated, internally dependent objects beans get updated automatically as being managed by EJB entity bean. Following are the participants in Composite Entity Bean.