spring - @Autowire using singleton vs prototype -

take @ following code:

@controller public class homecontroller {        @autowired     private facaderemote fr;  // code omitted    } 

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@component("user-details") public class customuserservicedetails implements userdetailsservice {      @autowired     private facaderemote fr;      @override     public userdetails loaduserbyusername(string email)             throws usernamenotfoundexception     {         // omitted     }  } 

configuration:

<!-- jndi properties -->     <util:properties id="jndiprops">         <beans:prop key="java.naming.factory.initial">org.jboss.naming.remote.client.initialcontextfactory</beans:prop>         <beans:prop key="java.naming.factory.url.pkgs">org.jboss.ejb.client.naming</beans:prop>         <beans:prop key="java.naming.provider.url">remote://127.0.0.1:4447</beans:prop>         <beans:prop key="java.naming.client.ejb.context">true</beans:prop>         <beans:prop key="boss.naming.client.connect.options.org.xnio.options.sasl_policy_noplaintext">false</beans:prop>     </util:properties>       <!-- ejb -->     <jee:remote-slsb id="ns" jndi-name="layer//myejb!com.uni.ag.facaderemote"         environment-ref="jndiprops" resource-ref="false"         business-interface="com.uni.ag.facaderemote"         lookup-home-on-startup="true">     </jee:remote-slsb> 

in following example how @autowire works:
2 classes using same instance of facaderemote ?
in general how can learn @autowire behaviour in relation thread-safety ?

there no relation between @autowired , thread-safety. responsibility of spring ioc inject declared dependencies, taking account scope etc. it's responsibility make sure, beans work correctly in multi-threaded applications. means example singleton beans state bean holds should synchronized.

regarding first question: there injected proxy facaderemote (to allow example transations of checked exception remoteexception unchecked exception). according spring spec inside proxy cached instance of remote interface facaderemote.