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From Istvan Orban <istv...@mailbox.hu>
Subject Re: Configuration ?
Date Sun, 17 Oct 2004 11:10:20 GMT
Hi,

thanks for the answer. I think I just wanted to overcompicate it as 
usual ;)

I wanted to have my DataSource(s) as private 'services' (objects) 
configured individually for each service which needs it.
But I guess that's just something I do not really need, and it's easier 
this way.

Istvan

>Hello Istvan,
>
>First of all the problem you describe is not actually related to
>configuration points and contributions in HiveMind.
>I think one easy way to do what you want is to do something like that:
>
><service-point id="DataSource1" interface="javax.sql.DataSource">
>	<invoke-factory service-id="hivemind.BuilderFactory">
>		<construct class="org.apache.commons.dbcp.BasicDataSource">
>			...
>		</construct>
>	</invoke-factory>
></service-point>
><service-point id="DataSource2" interface="javax.sql.DataSource">
>	<invoke-factory service-id="hivemind.BuilderFactory">
>		<construct class="org.apache.commons.dbcp.BasicDataSource">
>			...
>		</construct>
>	</invoke-factory>
></service-point>
>
>And then for any service that need access to DataSource1:
>
><service-point id="MyDAO" interface="com.acme.MyDAO">
>	<invoke-factory service-id="hivemind.BuilderFactory">
>		<construct class="com.acme.MyDAOImpl">
>			<set-service property="dataSource"
>					service-id="DataSource1">
>		</construct>
>	</invoke-factory>
></service-point>
>
>What is important here (it seems you missed that) is not to exclusively use
><set> when you use BuilderFactory, but use the more appropriate
><set-service>.
>
>If you have a service that needs both DataSource 1 & 2, just do:
>
><service-point id="MyComplexDAO" interface="com.acme.MyComplexDAO">
>	<invoke-factory service-id="hivemind.BuilderFactory">
>		<construct class="com.acme.MyDAOComplexImpl">
>			<set-service property="dataSource1"
>					service-id="DataSource1">
><set-service property="dataSource2"
>					service-id="DataSource2">
></construct>
>	</invoke-factory>
></service-point>
>
>Hope this helps
>
>
>-----Original Message-----
>From: Istvan Orban [mailto:istvano@mailbox.hu]
>Sent: Sunday, October 17, 2004 3:13 PM
>To: hivemind-user@jakarta.apache.org
>Subject: Configuration ?
>
>Hi,
>
>I come across with an other problem. it seems the configuration and
>contribution part is not fully clear for in Hivemind.
>
>I have some services which needs Database access,
>I have got 2 services accessing the same db, and an other which requests
>data from a second db.
>
>I do not want to create 2 servicse for accessing the the 2 db, although
>I like this example as how easy to configure DB access with Hivemind
>
>    <service-point id="DefaultDataSource" interface="javax.sql.DataSource">
>        <invoke-factory service-id="hivemind.BuilderFactory">
>            <construct class="org.apache.commons.dbcp.BasicDataSource">
>                <set property="driverClassName"
>value="org.firebirdsql.jdbc.FBDriver"/>
>                <set property="url"
>value="jdbc:firebirdsql:localhost/3050:D:/Firebird/data/etstore.gdb"/>
>                <set property="username" value="SYSDBA"/>
>                <set property="password" value="masterkey"/>
>            </construct>
>        </invoke-factory>
>    </service-point>
>
>
>My services has a property called Datasource and I would like to feed
>them somehow using the configuratoin power of Hivemind.
>But I'm little stuck how could I have 2 configurations where I have 2
>pooled DataSource with all the config values set
>and when defining the 3 servies I would just bind the needed Datasource
>to the service.
>
>Could someone give me some useful advices, or directions what should I
>use, or how could I achive this the best way.
>
>Thanks a lot!
>
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>
>.
>
>  
>


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