Integrating a third-party JTA
Hi, Does anybody have any useful pointers on how to integrate a third- party JTA (Atomikos) into Geronimo? Thanks, Guy
Re: Integrating a third-party JTA
Other then code that attempts to cast the transaction manger to GeronimoTransactionManager (or other Geronimo transaction interfaces) it shouldn't be that difficult. The biggest issue will be if you want to use the Geronimo connector implementation, then you will have to figure out how to adapt the JTA implementation to the org.apache.geronimo.transaction.manager.XAWork interface. The second biggest issue, will be convincing G to correctly build the JTA implementation which will require a GBean wrapper of some kind. -dain On Oct 22, 2007, at 2:29 AM, Guy Pardon wrote: Hi, Does anybody have any useful pointers on how to integrate a third- party JTA (Atomikos) into Geronimo? Thanks, Guy
Re: Integrating a third-party JTA
Hi, Thanks. Where can I see samples of this (how is it done now)? I couldn't find the right module so far... Or is it in a jar somewhere? Guy On 22-okt-07, at 22:08, Dain Sundstrom wrote: Other then code that attempts to cast the transaction manger to GeronimoTransactionManager (or other Geronimo transaction interfaces) it shouldn't be that difficult. The biggest issue will be if you want to use the Geronimo connector implementation, then you will have to figure out how to adapt the JTA implementation to the org.apache.geronimo.transaction.manager.XAWork interface. The second biggest issue, will be convincing G to correctly build the JTA implementation which will require a GBean wrapper of some kind. -dain On Oct 22, 2007, at 2:29 AM, Guy Pardon wrote: Hi, Does anybody have any useful pointers on how to integrate a third- party JTA (Atomikos) into Geronimo? Thanks, Guy
Re: Integrating a third-party JTA
On Oct 22, 2007, at 1:45 PM, Guy Pardon wrote: Hi, Thanks. Where can I see samples of this (how is it done now)? I couldn't find the right module so far... Or is it in a jar somewhere? Our J2CA and JTA implementation is in https://svn.apache.org/repos/ asf/geronimo/components/txmanager/trunk. You can see how we handle the J2CA transaction import using XATerminator and XAWork interfaces. Also notice that in order to make transaction recovery work without necessarily all previously existing RMs starting up again we've named the RMs with NamedXAResource. The idea is that when the tm starts up again it reads the log to find all the in- flight txs and as each RM starts up it registers with the TM and the outstanding in-flight txs in that RM are either rolled back or committed based on what's in the log. In order to clear out txs where some or all RMs are actually committed before the tm logs complete we compare the names of the RM with the names stored with the xids in the log. In the geronimo modules/geronimo-transaction module we have gbeans that start the actual TM components at runtime. You will at least need to write some gbean wrappers for the Atomikos TM. You'll probably want to write a replacement configs/transaction module to use instead of the standard one. Then you can map uses of our tm module to yours with an entry in var/config/artifact_aliases.properties. Hope this helps david jencks Guy On 22-okt-07, at 22:08, Dain Sundstrom wrote: Other then code that attempts to cast the transaction manger to GeronimoTransactionManager (or other Geronimo transaction interfaces) it shouldn't be that difficult. The biggest issue will be if you want to use the Geronimo connector implementation, then you will have to figure out how to adapt the JTA implementation to the org.apache.geronimo.transaction.manager.XAWork interface. The second biggest issue, will be convincing G to correctly build the JTA implementation which will require a GBean wrapper of some kind. -dain On Oct 22, 2007, at 2:29 AM, Guy Pardon wrote: Hi, Does anybody have any useful pointers on how to integrate a third- party JTA (Atomikos) into Geronimo? Thanks, Guy
Re: Integrating a third-party JTA
Thanks David, That helps - I will have a look! Guy On 23-okt-07, at 00:21, David Jencks wrote: On Oct 22, 2007, at 1:45 PM, Guy Pardon wrote: Hi, Thanks. Where can I see samples of this (how is it done now)? I couldn't find the right module so far... Or is it in a jar somewhere? Our J2CA and JTA implementation is in https://svn.apache.org/repos/ asf/geronimo/components/txmanager/trunk. You can see how we handle the J2CA transaction import using XATerminator and XAWork interfaces. Also notice that in order to make transaction recovery work without necessarily all previously existing RMs starting up again we've named the RMs with NamedXAResource. The idea is that when the tm starts up again it reads the log to find all the in- flight txs and as each RM starts up it registers with the TM and the outstanding in-flight txs in that RM are either rolled back or committed based on what's in the log. In order to clear out txs where some or all RMs are actually committed before the tm logs complete we compare the names of the RM with the names stored with the xids in the log. In the geronimo modules/geronimo-transaction module we have gbeans that start the actual TM components at runtime. You will at least need to write some gbean wrappers for the Atomikos TM. You'll probably want to write a replacement configs/transaction module to use instead of the standard one. Then you can map uses of our tm module to yours with an entry in var/config/ artifact_aliases.properties. Hope this helps david jencks Guy On 22-okt-07, at 22:08, Dain Sundstrom wrote: Other then code that attempts to cast the transaction manger to GeronimoTransactionManager (or other Geronimo transaction interfaces) it shouldn't be that difficult. The biggest issue will be if you want to use the Geronimo connector implementation, then you will have to figure out how to adapt the JTA implementation to the org.apache.geronimo.transaction.manager.XAWork interface. The second biggest issue, will be convincing G to correctly build the JTA implementation which will require a GBean wrapper of some kind. -dain On Oct 22, 2007, at 2:29 AM, Guy Pardon wrote: Hi, Does anybody have any useful pointers on how to integrate a third-party JTA (Atomikos) into Geronimo? Thanks, Guy
