withTransaction(true) issue

[Sven Haiges]

Hi all, 

I am trying to perform a cross-group transaction, according to the tutorial that's a call with true as the first parameter to withTransaction:

//true signals cross-group transaction

datastore.withTransaction(true) { 

//delete sessions

def sessionKeys = datastore.execute {

select keys 

from 'session'

}

log.info "Will attempt to delete ${sessionKeys.size()} sessions."

datastore.delete(sessionKeys)

log.info "DONE"

//delete participants

def participantKeys = datastore.execute {

select keys 

from 'participant'

}

log.info "Will attempt to delete ${participantKeys.size()} participants."

datastore.delete(participantKeys)

log.info "DONE"

//delete event

log.info "Will attempt to delete the default event"

getEvent(params.id).delete()

log.info "DONE"

}

Unfortunately I get this error:

groovy.lang.MissingMethodException: No signature of method: com.google.appengine.api.datastore.DatastoreServiceImpl.withTransaction() is applicable for argument types: (java.lang.Boolean, events$_delete_closure1) values: [true, events$_delete_closure1@15ca4d6b]

So it seems the implementation is simply missing. I am running with gaelyk 1.2, the current final out there. 

Any ideas what could be wrong?

Thx

Sven

[Guillaume Laforge]

Hi Sven,

Groovy's error message here is actually right, as it's not finding that method.

It seems we added withTransaction(true) {} after 1.2, last december, so it's going to be available in Gaelyk 2.0.

But the documentation seems to reference some 2.0 elements (I thought it didn't and it's a mistake), and we also uploaded a 2.0-SNAPSHOT version of the JavaDoc as well, so it's a bit confusing for our users I reckon :-(

So, for now, either use a 2.0-SNAPSHOT, or be patient for a few more days as the Gaelyk 2.0 release is imminent.

Guillaume

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--
Guillaume Laforge
Groovy Project Manager
SpringSource, a division of VMware

Blog: http://glaforge.appspot.com/

Social: @glaforge / Google+

[Sven Haiges]

Wow, thx for the good news. Go go go Gaelyk2!