|Nonetheless, it would be great if the new CMP stuff will be able to
|support multiple datasources i.e. move the datasource from a JAWS file
|level node to a bean level value.
I should really add a slide in the training called "scratch your own itch,
Open Source's dirty little secret"...
You want it? bad?
You know what to do....
marcf
|
|Thanks
|
|Vinay
|
|marc fleury wrote:
|>
|> Not all configuration cases will uses transactions across different
|> databases (i.e. really require XA synchronization).
|>
|> The case Vinay is talking about is fairly simple simple 2 beans,
|2 different
|> apps (they don't talk to each other so no transaction enrollment), 2
|> different databases, which is a perfectly valid approach to web container
|> app design, in fact a smart way to handle the database access
|from your web
|> layers ( and teh real reason I suspect he is asking for this feature).
|>
|> Distributed transaction is another ball game altogether, but what he is
|> asking for doesn't necessarily require that. Also he has been through my
|> training and he knows that distributed transactions are bad mkey?
|>
|> In short it is a very valid feature Vinay, as everyone told you (dain,
|> danch), why don't you go ahead and hack the metadata code to
|make sure you
|> can support multiple datasources (I am surprised it is not there yet).
|>
|> Talk to sebastien if you need help on that code, he wrote it.
|>
|> regards
|> marcf
|>
|> |-----Original Message-----
|> |From: [EMAIL PROTECTED]
|> |[mailto:[EMAIL PROTECTED]]On Behalf Of danch
|> |Sent: Sunday, June 24, 2001 11:58 PM
|> |To: [EMAIL PROTECTED]
|> |Subject: Re: [JBoss-dev] JAWS -Single Datasource
|> |
|> |
|> |Dain Sundstrom wrote:
|> |
|> |> No reason to tie an entire jar to a single datasource. I'll
|> |check my code
|> |> to see if it can support multiple datasources, although I
|don't think it
|> |> will work with most DBs. This would require the DBs to
|natively support
|> |> JDBC 2.0 XA transactions, and if I remember most DBs don't
|have 2-phase
|> |> commit drivers yet.
|> |>
|> |> -dain
|> |
|> |I believe they are getting much closer (at least if implementations of
|> |the XA extensions to JDBC are a true indicator). Of course, many of the
|> |XA implementations are broken in incompatible ways.
|> |
|> |Also, this wouldn't matter so long as the beans that are in different
|> |databases are in different transactions. But then there'd be no reason
|> |not to split them into different ejb-jar files.
|> |
|> |-danch
|> |
|> |
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