Howto implement Webservice Transactionmanagement

[alexander.paluch]

Hello Everyone,

I would like to implement an compensation mechanism for webservice calls that write into other systems (using JAX-WS). I call webservices from my (stateless) EJB Services.

I thought of implementing an undo mechanism via the command pattern. A webservice - call represents a command. I could the put all the webservice calls on a stack and if something went wrong during the transaction, the sucessfully called webservices are taken from the stack, and the undo method gets called.

I am sure this problem is not a new one: it sounds pretty much like implementing a Transaction manager. I dont want to reinvent the wheel. Could I do so by implementing some API (maybe via JCA?`or using mbeans?)

What is the right way to do this?

Any help highly appreciated!

Thanks,

Alex

[adinn]

Hi Alexander,

JBoss supervised a Master's student project on this theme which was presented at JavaOne 2007 which you can download as both binary and source.

I am currently reworking  this code to integrate it with JBossTS and XTS. The current plan is to have it available in JBossTS 4.15 and from there to eventually include it as a supported product in EAP 6.0.

[thegroove]

Salut Andrew,

Salut Alexander,

would'nt it be a better solution to implement a managed client

webservice as with a conector mechanism.

I think i would be an advantage to get my ressource out

of a pool of connection. Beside it would be preferable, to

have watermarks, in oder to limit the use of connections.

Last not least the configuration is a task, that needs to

be acomplished. Timeout and overwritten target URL

need to be managed, cause nobody wants to use the

default target given by a wsdl file.

Any overridden parametes should be stored in a datasource-file,

that should stay, regardless iff the aplication has been undeployed

or broght back into business.

Maybe we can provide a sort of generic connector, that

gets a wsdl a dynymic template pater, in order to generate

the filter files while deploying the app.

Christian

I think a