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Posted to user@tuscany.apache.org by Peizhao Hu <pe...@itee.uq.edu.au> on 2007/07/12 07:28:02 UTC

Any requirement for making a reference name

Hi,

I have a composite file like the following:

<?xml version="1.0" encoding="UTF-8"?>
<composite xmlns="http://www.osoa.org/xmlns/sca/1.0"
           name="SensorProcess">

    <component name="SensorProcessServiceComponent">
        <implementation.java 
class="sensorprocess.SensorProcessServiceImpl"/>
        <reference name="ADC2KelvinService" 
target="ADC2KelvinServiceComponent" />
        <reference name="kelvin2CelsiusService" 
target="Kelvin2CelsiusServiceComponent" />
        <reference name="celsius2FahrenheitService" 
target="Celsius2FahrenheitServiceComponent" />
    </component>

    <component name="ADC2KelvinServiceComponent">
        <implementation.java class="sensorprocess.ADC2KelvinServiceImpl"/>
    </component>
 
    <component name="Kelvin2CelsiusServiceComponent">
        <implementation.java 
class="sensorprocess.Kelvin2CelsiusServiceImpl"/>
    </component>

    <component name="Celsius2FahrenheitServiceComponent">
        <implementation.java 
class="sensorprocess.Celsius2FahrenheitServiceImpl"/>
    </component>

</composite>

I found that if I put the reference name of each service to a slightly different name. it will not find the reference object. so is there any requirement on reference name definition?

in my example, I have two different naming problems. for example: if I use ADC2KelvinService, it will work, but not aDC2KelvinService
, and in second case, if I use Kelvin2CelsiusService, it won't work. 

-- 
regards;

Peizhao


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Re: Any requirement for making a reference name

Posted by Raymond Feng <en...@gmail.com>.
Hi,

The reference is defined on the componentType and it can then be configured 
at the component level. For example, a java component implementation can use 
@Reference annotation to declare a reference for the componentType.

package xyz;
public class MyServiceImpl {
    @Reference(name="myRef1")
    protected Service1 myRef1;

    or
    @Reference // the reference name is default to the property name, i.e., 
myRef2
    void setMyRef2(Service2 myRef2);
    ...
}

Then you can have more than one components using the same impl class but 
with different configurations:

<component name="C1">
    <implementation.java class="xyz.myServiceImpl">
    <reference name="myRef1" target="C3/S1"/>
</component>

<component name="C2">
    <implementation.java class="xyz.myServiceImpl">
    <reference name="myRef1" target="C4/S1"/>
</component>

For more information about the componentType and component, please see the 
SCA assembly spec @ 
http://www.osoa.org/download/attachments/35/SCA_AssemblyModel_V100.pdf?version=1. 
(Around line 428).

Thanks,
Raymond

----- Original Message ----- 
From: "Peizhao Hu" <pe...@itee.uq.edu.au>
To: <tu...@ws.apache.org>
Sent: Wednesday, July 11, 2007 10:28 PM
Subject: Any requirement for making a reference name


> Hi,
>
> I have a composite file like the following:
>
> <?xml version="1.0" encoding="UTF-8"?>
> <composite xmlns="http://www.osoa.org/xmlns/sca/1.0"
>           name="SensorProcess">
>
>    <component name="SensorProcessServiceComponent">
>        <implementation.java 
> class="sensorprocess.SensorProcessServiceImpl"/>
>        <reference name="ADC2KelvinService" 
> target="ADC2KelvinServiceComponent" />
>        <reference name="kelvin2CelsiusService" 
> target="Kelvin2CelsiusServiceComponent" />
>        <reference name="celsius2FahrenheitService" 
> target="Celsius2FahrenheitServiceComponent" />
>    </component>
>
>    <component name="ADC2KelvinServiceComponent">
>        <implementation.java class="sensorprocess.ADC2KelvinServiceImpl"/>
>    </component>
>
>    <component name="Kelvin2CelsiusServiceComponent">
>        <implementation.java 
> class="sensorprocess.Kelvin2CelsiusServiceImpl"/>
>    </component>
>
>    <component name="Celsius2FahrenheitServiceComponent">
>        <implementation.java 
> class="sensorprocess.Celsius2FahrenheitServiceImpl"/>
>    </component>
>
> </composite>
>
> I found that if I put the reference name of each service to a slightly 
> different name. it will not find the reference object. so is there any 
> requirement on reference name definition?
>
> in my example, I have two different naming problems. for example: if I use 
> ADC2KelvinService, it will work, but not aDC2KelvinService
> , and in second case, if I use Kelvin2CelsiusService, it won't work.
> -- 
> regards;
>
> Peizhao
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: tuscany-user-unsubscribe@ws.apache.org
> For additional commands, e-mail: tuscany-user-help@ws.apache.org
> 


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