use resource-ref to map a java:/comp/env/MyDS to the appropriate actual
datasource for each bean.
david jencks
On 2002.06.06 18:50:28 -0400 David Brady wrote:
>
> I have a live database which is kept up-to-date with system usage
> information from the last hour. Data older than an hour is moved to a
> warehouse database.
>
> A stateless bean (call it UsageBean) already exists which reads data from
>
> the live database. I'd like to be able to use the same bean (kinda!),
> etc
> to read the data from the warehouse.
>
> I've already created two datasources: UsageLiveDS, and UsageWarehouseDS.
>
> My initial thought was to handle this all through manipulating
> ejb-jar.xml,
> and jboss.xml - creating an ejb called UsageLive, and UsageWarehouse.
>
> ejb-jar.xml
>
> <session>
> <ejb-name>UsageLive</ejb-name>
> <home>UsageHome</home>
> <remote>Usage</remote>
> <ejb-class>UsageBean</ejb-class>
> <session-type>Stateless</session-type>
> <transaction-type>Bean</transaction-type>
> </session>
>
> <session>
> <ejb-name>UsageWarehouse</ejb-name>
> <home>UsageHome</home>
> <remote>Usage</remote>
> <ejb-class>UsageBean</ejb-class>
> <session-type>Stateless</session-type>
> <transaction-type>Bean</transaction-type>
> </session>
>
> And somehow (somewhere) map the datasources appropriately. But I'm
> having a
> conceptual block on how to make this work 'cause of how I get connections
> in
> UsageBean:
>
> InitialContext initialCtx = new InitialContext();
> ds = (DataSource)initialCtx.lookup("java:/jdbc/UsageLiveDS");
>
> How do I grab a datasource without 'hardcoding' it in this class? In
> other
> words, how do I dynamically map a datasource using ejb-jar.xml, and
> jboss.xml, and have a stateless bean use this datasource?
>
> Thanks in advance.
>
> David
>
>
>
>
>
>
>
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