template objects in spring framework

*JMS — a template instance is a jms session
** anon inner class

*JDBC — a template instance is a database connection
** callback — an anon inner class

*hibernate — a template instance is a hibernate Session

*transaction — a template instance is a … transaction session?
** callback — an anon inner class

Spring Templates follow template-method design pattern. The callback objects provide the missing steps int the template method.

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