7.10. Controller Mode

By default, the Microcontainer uses the AUTO controller mode. It pushes beans as far as they go with respect to dependencies. But there are two other modes: MANUAL and ON_DEMAND.
If the bean is marked as ON_DEMAND, it will not be used or installed installed until some other bean explicitly depends on it. In MANUAL mode, the Microcontainer user must push the bean forward and backward along the state ladder.

Example 7.20. Bean Controller Mode

<bean name="OptionalService" class="org.jboss.demos.ioc.mode.OptionalService" mode="On Demand"/>
<bean name="OptionalServiceUser" class="org.jboss.demos.ioc.mode.OptionalServiceUser"/>
<bean name="ManualService" class="org.jboss.demos.ioc.mode.ManualService" mode="Manual"/>
<bean name="ManualServiceUser" class="org.jboss.demos.ioc.mode.ManualServiceUser">
  <start>
    <parameter><inject bean="ManualService" fromContext="context" state="Not Installed"/></parameter>
  </start>
</bean>

Note

Using the fromContext attribute of the inject class, you can inject beans, as well as their unmodifiable Microcontainer component representation.
Review the code of OptionalServiceUser and ManualServiceUser for how to use the Microcontainer API for ON_DEMAND and MANUAL bean handling.