Part Reference Directive
Description
A <part> elements enables the declaration of a single nested component via specification of a part uri. During construction of a component, a classloader chain will be constructured using the enclosing classloader as an anchor and a chain definition based on the supplied part classpath definition.
Element Attributes
| key | A required key identifying the nested part. |
| uri | A required artifact uri resolvable to a part datastructure. |
Nested Elements
| param | 0..n a key/value binding used to construct a uri query argument. |
Example
The following XML fragment demonstrates a component directive containing a single nested part reference. The example demonstrates the declaration of a context entry query qualifier using a nested param value.
<component xmlns="dpml:metro" name="demo" class="org.acme.Demo">
<parts>
<part key="widget" uri="link:part:org/acme/org-acme-widget">
<param key="message" value="Hello"/>
</part>
</parts>
</component>