z2-Environment

h1. Transaction management in Z2

(work in progress)

Alternatives - mini JTA, full JTA.

Integration points: Jetty, Hibernate, Spring

Explain transaction util.

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This Wiki is about how to integrate a full-blown transaction manager into Z2. We only consider Atomikos for now, hoping other TMs can be used similarly.

Note that the z2-base.base repository contains the JTA 1.1 API and an implementation of it in the module *com.zfabrik.jta*. That is however not a real, full-featured transaction manager - rather just a pseudo-distributed transaction management implementation. There is no 2-phase-commit handling. 

It is still extremely useful for 90% case where global, distributed transactions are unnecessary overkill. 

At times however, you may require a real TM and even if you dont and want to use Atomikos with non-XA data sources, in which case it behaves similarly to *com.zfabrik.jta*, here is how it's done.

There are two samples related to this page:

* *z2-samples.jta-plain*: A sample scenario with just z2-base and Atomikos and no further trickery. This samples explains best what is needed to get going. See also [[Sample_jta_plain]].

* *z2-samples.jta-spring*: A sample scenario built on z2-base, z2-addons.spring, and Atomikos. This is the more advanced, Spring-minded case. The underlying mechanics may be harder to grasp though. See also [[samples_jta_spring]].

Please consult [[How_to_Run_a_Sample]] on how to run these samples.

h2. References

* [[How_to_Run_a_Sample]]

* [[How_to_Spring]]