[jboss-dev-forums] [Design the new POJO MicroContainer] - Install Items

[adrian@jboss.org]

While discussing how the OSGi service layer works,
we came up with a better way of doing something that is already supported
in the Microcontainer.

An example would be the new deployers configuration
where you "manually" install deployers into the main deployer, e.g.


  | <!--
  |     Security Deployer
  | -->
  | <deployment xmlns="urn:jboss:bean-deployer:2.0"> 
  |    <bean name="SecurityDeployer" class="org.jboss.deployment.security.SecurityDeployer">
  |       <install bean="MainDeployer" method="addDeployer">
  |          <parameter>
  |             <this/>
  |          </parameter>
  |       </install>
  |       <uninstall bean="MainDeployer" method="removeDeployer">
  |          <parameter>
  |             <this/>
  |          </parameter>
  |       </uninstall>
  |       <property name="type">security</property>
  |       <property name="ignoreSuffixes">
  |           <set elementClass="java.lang.String">
  |                <value>xml</value>
  |                <value>beans</value>
  |                <value>deployer</value>
  |           </set>
  |        </property>
  |    </bean>
  | </deployment>
  | 

The idea is to remove the install and uninstall from the individual deployer xmls
and instead configure the MainDeployer to want all implementations
of a specific class, in this case org.jboss.deployers.spi.deployer.Deployer
and have the Microcontainer do the add/remove invocations.


  |    /**
  |     * Add a deployer
  |     * 
  |     * @param deployer the deployer
  |     */
  |    @Install
  |    public synchronized void addDeployer(Deployer deployer) { ... }
  |    
  |    /**
  |     * Remove a deployer
  |     * 
  |     * @param deployer the deployer
  |     */
  |    @Uninstall
  |    public synchronized void removeDeployer(Deployer deployer) { ... }
  | 

This feature is being tracked here:
http://jira.jboss.com/jira/browse/JBMICROCONT-165

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