Spring alternative for Factory -

may duplicate, please feel free tag... newbie spring.

i implementing userservice getting user details different vendors, class structure

interface userservice ->> userservicea, userserviceb

which user service use depends upon field called provider. code like

public interface externaluserservice {     externaluserdto getuserdetail(string username); } 

implementations -

public class googleuserservice implements externaluserservice{     @override     public externaluserdto getuserdetail(string username) {         return user;     } }  public class facebookuserservice implements externaluserservice{     @override     public externaluserdto getuserdetail(string username) {         return user;     } } 

i want use in code in fashion, dont know if possible, giving try see if possible

public class externalusermanager(string provider) {     string provider;     @autowired     externaluserservice service; //this supposed come factory, dont know how in spring context.      public void dosomething(string username) {         system.out.println(service.getuserdetail(username));     } }   had been in conventional java programming, have created factory called userservicefactory, have made things straight.   can please me on how possible spring, , if possible, how can achieve it? use spring boot, no xml config.  

you can use @bean annotated method scope 'prototype' factory. spring call method anytime bean injected somewhere.

import org.springframework.beans.factory.config.beandefinition; ... @bean @scope(beandefinition.scope_prototype) public externaluserservice externaluserservice(userservicefactory factory,userproviderresolver resolver) {     .. create user service depending on resolver.getprovider() } 

the userservicefactory used create specific service depending on provider name, described.

create class userproviderresolver whith method getprovider() returns provider name current request or user.

you can @autowire httprequest in userproviderresolver access current request.