Mapping is the job of Hibernate, not Drools ;)
To be able to manage data in/from a database (persist, read,...) you
need to configure Hibernate and one of these config steps is to provide
the mapping.
Cheers,
Jarek
Senlin Liang wrote:
Hi,
Thanks a lot! The information is really helpful.
One more question is that: I have to create the mapping between
"objects" to relational database "tables", or Drools can do this
automatically (by create the tables/objects of correct types) ?
Thanks again,
Senlin
On Tue, Jul 8, 2008 at 9:30 AM, Anstis, Michael (M.) <[EMAIL PROTECTED]> wrote:
Hi,
Jaroslaw Kijanowski's article looks like a really good starting point
for you!
Hibernate provide Entity Manager and Annotations extensions if you want
to go the JPA route.
>From a Drool's perspective you need only concern yourself with "from"
which is documented as:-
6.5.2.8. From
The from Conditional Element allows users to specify a source for
patterns to reason over. This allows the engine to reason over data not
in the Working Memory. This could be a sub-field on a bound variable or
the results of a method call. It is a powerful construction that allows
out of the box integration with other application components and
frameworks. One common example is the integration with data retrieved
on-demand from databases using hibernate named queries.
For information on the rest of Jaroslaw's example, you will need to read
up on Hibernate.
With kind regards,
Mike
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Senlin Liang
Sent: 08 July 2008 13:12
To: Rules Users List
Subject: Re: [rules-users] One question about Database interface
Thanks. Where could I find the related manual or instructions? I
searched through the doc for drools, and the email archive, there is
really no good example or explanation on how to achieve this.
(What I want is to insert, select or delete some objects in relational
database such as mysql.)
Any information is greatly appreciated.
Thanks.
On Tue, Jul 8, 2008 at 4:20 AM, Anstis, Michael (M.) <[EMAIL PROTECTED]>
wrote:
Have a look at an example posted earlier this week whereby somebody
(sorry I forget who) was using JPA from within a rule.
Once you understand how JPA was used then the remaining questions
relate
more specifically to JPA.
As Mark says, (native) Hibernate can also be used very easily.
With kind regards,
Mike
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Senlin Liang
Sent: 08 July 2008 03:18
To: Rules Users List
Subject: [rules-users] One question about Database interface
Hi all,
Is there some convinent database interface implemented in Drools
(store and retrieve data from DBMS, such as mysql) ?
I checked the manual, and found no such information. So I am assuming
that I will have to use JDBC. Is it right?
Thanks,
Senlin Liang
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Senlin Liang
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