Java Message Service Examples - The Java EE 6 Tutorial: Advanced Topics - page 444

the assignments. Then it removes the entity. The application client's message
listener retrieves the information.
Figure 21-4 illustrates the structure of this application. Of course, an actual HR applica-
tion would have more components; other beans could set up payroll and benefits records,
schedule orientation, and so on.
FIGURE 21-4. An Enterprise Bean Application: Client to Message-Driven Beans to
Entity
Figure 21-4 assumes that OfficeMDB is the first message-driven bean to consume the
message from the client. OfficeMDB then creates and persists the SetupOffice entity
and stores the office information. EquipmentMDB then finds the entity, stores the equip-
ment information, and learns that the entity has completed its work. EquipmentMDB
then sends the message to the reply queue and removes the entity.