java - Spring autowired bean for @Aspect aspect is null -

i have following spring configuration:

<context:component-scan base-package="uk.co.mysite.googlecontactsync.aop"/>  <bean name="simpleemailsender" class="uk.co.mysite.util.email.simple.simpleemailsenderimplementation"/>  <aop:aspectj-autoproxy/> 

then have aspect:

@aspect public class syncloggingaspect {     @autowired     private simpleemailsender simpleemailsender      @afterreturning(value="execution(* uk.co.mysite.datasync.polling.poller+.dopoll())", returning="pusher")     public void afterpoll(pusher pusher) {               simpleemailsender.send(new pusheremail(pusher));     } } 

this aspect works (i can hit breakpoint on afterpoll) simpleemailsender null. unfortunately cannot find clear documentation on why is. (for record, simpleemailsender bean exists , correctly wired other classes) following things confuse me:

1. is context:component-scan supposed picking @aspect? if surely spring managed bean, autowired should work?
2. if context:component-scan isn't creating aspects, how aspect being created? thought aop:aspectj-autoproxy creates beanpostprocessor proxy @aspect class? how if isn't spring managed bean?

obviously can tell don't have understanding of how things should working ground up.

the aspect singleton object , created outside spring container. solution xml configuration use spring's factory method retrieve aspect.

<bean id="syncloggingaspect" class="uk.co.demo.syncloggingaspect"       factory-method="aspectof" /> 

with configuration aspect treated other spring bean , autowiring work normal.

you have use factory-method on enum objects , other objects without constructor or objects created outside spring container.