There are many varieties of custom enterprise Java applications
that exist in the world today. While some of these applications
are simple web-based applications leveraging a few local Java-
Beans or POJOs (Plain Old Java Objects), many are
sophisticated n-tiered applications using commercial or open
source application servers leveraging frameworks such as remote
Enterprise Java Beans (EJBs), messaging using JMS (Java Mes-
saging Service), or even Spring. While some of these
sophisticated enterprise applications work fine, most seem to
suffer from random and sometimes unexplainable data integrity
problems including incorrect account balances, multiple orders
shipped to a customer, orders “lost” by the system, and general
data synchronization issues between tables in a database. These
types of problems are usually caused by an ineffective or miss-
ing transaction management strategy.
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