-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Gustavo Niemeyer wrote: >> In integrating the two (storm and zope3/zodb) for the project I'm >> working on my current plan is to create an IDataManager for storm >> which will do-the-right-thing(tm) ie: rollback/commit based on the >> success/failure/readiness of other connections, not sure if this helps > > Zope3's (ZODB's, actually) transaction system indeed offers the needed > hooks to put the two-phase commit in place, but it doesn't mean that > it will actually work with anything that hooks into it. If you have > two connections and you commit the first one without a two-phase > commit strategy, you can't roll it back once your second connection > fails to commit due to some conflict, for instance.
Note that TPC is *alsays* present in ZODB-driven transactions, even where only a single connection is uesd, and that virtually every Zope installation running in the world has at least two stores availalbe (the "main" one and the "temporary" one); updates which touch both have been exercising the TPC machnery prety thoroughly. TPC is also the mechanism used to drive features like transactional mail delivery[1] in Zope: the mailer registers as a "mock" connection, which defers sending mail until the 'tpc_finish' phase. It is useful to note that the "storages" do not *manage* the TPC process: rather, they dance to the tune called by the transaction object[2] itself. [1] http://www.dataflake.org/software/maildrophost/ [2] http://svn.zope.org/ZODB/trunk/doc/zodb.pdf, especially chapter 4. Tres. - -- =================================================================== Tres Seaver +1 540-429-0999 [EMAIL PROTECTED] Palladion Software "Excellence by Design" http://palladion.com -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFGljzY+gerLs4ltQ4RAnYLAJ9EUCU3re13YGSYrnUzbWHNR5MY7gCdGp5E 2RV7eKpYNJla2zwDUjHputA= =Y3MY -----END PGP SIGNATURE----- -- storm mailing list [email protected] Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/storm
