Java Reference
In-Depth Information
For example, suppose you have built an order management system using
EJB
s.
These beans provide the persistence layer and the access mechanism for manipu-
lating your purchase order data. If you wanted your important customers to
receive special treatment based on order size, you could tie MBeans into the
EJB
s
that could introspect on the data and send alerts to a manager when the dollar
value of an order exceeded a particular level. Figure 14.1 illustrates this concept.
Such a system could ensure that large orders received the special treatment
they needed faster than a manual review process could provide. Using
JMX
, this
application would be quicker, simpler, and more manageable.
14.1.3
Accessing enterprise data with JMX
MBeans can get enterprise information two ways:
An MBean can retrieve data directly from an
EJB
by invoking its access
methods.
An MBean can receive data being pushed from
EJB
s.
Figure 14.1
MBeans accessing back-end EJBs
