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How to declare a component type

XML
<component
    classname="my.Implementation"
    name="my-type"
>
</component>
Annotations
@Component(name="my-type")
public class Implementation {
  // ...
}

How to declare instances

<instance component="my-type"/>
<instance component="my.Implementation"/>
<instance component="my-type" name="my-instance"/>
<instance component="my-type" name="my-instance">
    <property name="property1" value="value1"/>
</instance>
</component>
  • Instances can contains a configuration given under the key-value form. Properties can also by complex type (refer to How-to use iPOJO factories)

How to provide a service

XML
<component classname="my.service.implementation" name="my-service-impl">
   <provides/>
</component>
<instance name="my-service-impl"/>
Annotations
@Component
@Provides
public class Implementation implements FooService {
   ...
}
  • Only instances provides really services, so don't forget to declare an instance.
  • Published service interfaces must be implemented by your component implementation

Publishing service properties

XML
<component classname="my.service.implementation" name="my-service-impl">
  <provides>
	<property name="foo" field="m_foo" />
	<property name="bar" field="m_bar" mandatory="true" />
	<property name="baz" type="java.lang.String" /> <!-- Static property (do not change at runtime) -->
  </provides>
</component>
<instance name="my-service-impl"> <!-- The configuration has to inject value in unvalued mandatory properties -->
  <property name="bar" value="5"/>
  <property name="baz" value="my string"/>
<instance/>
Annotations
@Component
@Provides(specifications= {FooService.class, BarService.class})
public class ProvidesProperties implements FooService, BarService {
    
    @ServiceProperty(name = "foo")
    public int m_foo = 0;
    
    @ServiceProperty(name="bar", mandatory=true)
    public int m_bar;
    
// ...
}
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