I've been working on creating a set of services that will be reused in a
variety of situations. What I really what is a way to bundle the schema,
contribution, and service construction stuff all together as a reusable
unit.
Here is what I had in mind is creating a template that includes
configuration point definitions, schema definitions, and a service-point
definition, all bound together. I think that ServiceImplementationFactories
get the latitude of defining a schema, but BuilderFactory, or
create-instance is enough for most of my purposes.
<template id="MyTemplate" interface="MyInterface">
<schema>
<element name="datum">
<attribute name="key" required="true" />
<attribute name="value" required="true" />
<rules>
<read-attribute attribute="key" property="keyData" />
<read-attribute attribute="value" property="valueData" />
</rules>
</element>
</schema>
<implementation>
<create-instance class="impl.MyServiceImpl" />
</implementation>
</template>
<service-point id="MyService" template-id="MyTemplate">
<dataum key="joe" value="fred" />
</service-point>
<service-point id="MyOtherService" template-id="MyTemplate">
<dataum key="mary" value="jane" />
</service-point>
The equivalent Hivemind configuration currently seems to be something like
the following, and the service
has to tear apart the configuration contribution.
<schema id="Simple">
<element name="datum">
<attribute name="key" required="true" />
<attribute name="value" required="true" />
<rules>
<read-attribute attribute="key" property="keyData" />
<read-attribute attribute="value" property="valueData" />
</rules>
</element>
</schema>
<configuration-point id="MyService" schema-id="Simple" />
<contribution configuration-id="MyService">
<dataum key="joe" value="fred" />
</contribution>
<service-point id="MyService" interface="MyInterface">
<invoke-factory>
<construct class="impl.MyServiceImpl">
<configuration>MyService</configuration>
</construct>
</invoke-factory>
</service-point>
<configuration-point id="MyOtherService" schema-id="Simple" />
<contribution configuration-id="MyOtherService">
<dataum key="mary" value="jane" />
</contribution>
<service-point id="MyOtherService" interface="MyInterface">
<invoke-factory>
<construct class="impl.MyServiceImpl">
<configuration>MyOtherService</configuration>
</construct>
</invoke-factory>
</service-point>
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