com.neeve.server.app.annotations

Annotation Type AppConfiguredAccessor

@Retention(value=RUNTIME)
@Target(value=METHOD)
public @interface AppConfiguredAccessor

Annotates the method that gets the application's Configured objects.

The annotated method must take a Set as its sole method parameter and populate it with objects containing Configured annotations.

Note: Consider using @AppIntrospectionPoints annotation as an alternative to this annotation. The @AppConfiguredAccessor is useful in cases where finer grained control of which objects in application should be scanned for @EventHandler annotations. For large application this can improve load time, but for smaller applications using @AppIntrospectionPoints results in less boilerplate code.

Example

In the below example an AdminCommandHandler object is added to the list of objects to scan for @Configured annotations. The apps main class is introspected for @Configured annotations by default.

 @AppHAPolicy(HAPolicy.StateReplication)
 public class MyApp {
   private class AdminCommandHandlers {
     @Configured("myapp.admin.gcCount", defaultValue="1")
     private int gcCount;
   
     @Command(name="triggerGC")
     public String triggerGC() {
       for(int i = 0; i < gcCount; i++) {
         System.gc();
       }
     }
   }
   
   @Configured("myapp.enableAdminCommands", defaultValue="false")
   private boolean enableAdminCommands;
   
   private final AdminCommandHandlers adminCommandHandler = AdminCommandHandlers(); 
   
   @AppConfiguredAccessor
   public void getConfiguredObjects(final Set<Object> objectsToConfigure) {
     objectsToConfigure.add(adminCommandHandler);
   }
   
   @AppCommandHandlerContainersAccessor
   public void getCommandHandlerContainers(final Set<Object> objectsToConfigure) {
     if(enableAdminCommands) {
       introspectionPoints.addAll(objectsToConfigure);
     }
   }
 }
 

See Also:

Configured, AppIntrospectionPoints