[ZODB-Dev] Mounted ZODB support ?

[Jim Fulton]

On Aug 26, 2006, at 2:45 PM, tav wrote:

> rehi all,
>
> whatever happened to mounted zodb support? did it ever exist in  
> standalone zodb?

No.  Starting in 3.3, ZODB has multi-database support, which made  
Zope 2's implementation of mounting much cleaner.

> looking at Mount.py, it seems to be pretty antiquated -- why is it
> even there?

It shouldn't be AFAIK.  I don't believe it was ever used.  I'm pretty  
sure it is a decoy.  I'll remove it. Thanks for reminding me of this.

> is it possible to hack mount support with the current code
> base?

Mounting is very much an application level concept.  Zope 2 supports  
mounting.  It's implementation builds on ZODB multi-database support.


> and finally, a neophyte question, how do you keep multiple zodb
> connections open in the same thread, but keep the various transactions
> involved isolated when you call commit(), abort(), &c. ?

By creating separate transaction managers and passing each connection  
it's own transaction manager when you create it.  This causes the  
connections to be divorced from the thread-local transaction  
manager.  Note that this has nothing to do with mounting or multi- 
databases.

Jim

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