CODEWITHSUNDEEP
javajakarta-eetransactions
Learner
Learner

Reputation: 21425

Java Distrbuted transaction components

I am learning the distributed transactions from Oracle documentation: http://docs.oracle.com/cd/B19306_01/java.102/b14355/xadistra.htm

I came across this statement, please help me in understanding what it means:

XA functionality is usually isolated from a client application, being implemented instead in a middle-tier environment, such as an application server.

In many scenarios, the application server and transaction manager will be together on the middle tier, possibly together with some of the application code as well.

What can be the client application and what is middle-tier environment? Is middle-tier environment and application server, both are same? I am thinking the application code lies on client application, is that correct?

I am new to these concepts so I am facing difficulty in understanding them, please help me to clarify them.

Upvotes: 0

Views: 52

Answers (1)

Gabriel Aramburu
Gabriel Aramburu

Reputation: 2981

I suggest that you read the JTA specification, which provides good conceptual information about what a distributed transaction is.

What can be the client application and what is middle-tier environment?

A client application is the code that demarcates the transaction boundaries (where the transaction begins and ends) This client code can execute from a java standalone or from a server side component like a servlet or ejb.

Is middle-tier environment and application server, both are same?

Think in the middle-tier as a concept that represents other components involved in a distributed transaction: the transaction manager, the resource manager, and the application server.

I am thinking the application code lies on client application, is that correct? yes

Upvotes: 1

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