Refactor subsystems for authentication chaining

- An authentication chain of size 1 configured by default
- DefaultChildApplicationContextManager supports dynamic configuration of the authentication chain via Spring or JMX. Any number of instances of any type allowed in chain.
- SubsystemChainingAuthenticationComponent and SubsystemChainingAuthenticationService iterate across configured chain for Authentication
- SSO (NTLM / Kerberos) and CIFS authentication independently activatable for any component in chain (where supported).
- SubsystemChainingProxyFactory used to proxy directly to first active CIFS authenticator or SSO filter in the chain
- CIFS server knows not to bother starting if authentication chain doesn't have an active CIFS authenticator (e.g. LDAP only)
- Rationalization of subsystem configuration folder structure and JMX object naming
- Classpath based extension mechanism for community edition - alfresco/extension/subsystems/<category>/<typeName>/<id>/*.properties in classpath can be used to configure specific subsystem instances
- Simplification of JMX infrastructure. No longer Spring bean definition based, thus allowing dynamic creation/registration of new instances at runtime.
- New AuthenticationChainTest unit test

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@14030 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/web/filter/beans/NullFilter.java

@@ -32,14 +32,37 @@ import javax.servlet.ServletException;
 import javax.servlet.ServletRequest;
 import javax.servlet.ServletResponse;
 
+import org.alfresco.repo.management.subsystems.ActivateableBean;
+
 /**
  * A Benign filter that does nothing more than invoke the filter chain. Allows strategic points of the filter chain to
  * be configured in and out according to the authentication subsystem in use.
  * 
  * @author dward
  */
-public class NullFilter implements DependencyInjectedFilter
+public class NullFilter implements DependencyInjectedFilter, ActivateableBean
 {
+    private boolean isActive = true;
+
+    /**
+     * Activates or deactivates the bean
+     * 
+     * @param active
+     *            <code>true</code> if the bean is active and initialization should complete
+     */
+    public void setActive(boolean active)
+    {
+        this.isActive = active;
+    }
+
+    /* (non-Javadoc)
+     * @see org.alfresco.repo.management.subsystems.ActivateableBean#isActive()
+     */
+    public boolean isActive()
+    {
+        return this.isActive;
+    }
+
     /*
      * (non-Javadoc)
      * @see org.alfresco.repo.web.filter.beans.DependencyInjectedFilter#doFilter(javax.servlet.ServletContext,
@@ -50,4 +73,6 @@ public class NullFilter implements DependencyInjectedFilter
     {
         chain.doFilter(request, response);
     }
+    
+    
 }