public @Bean
    MongoDbFactory mongoDbFactory() throws Exception {
        SimpleMongoDbFactory simpleMongoDbFactory = new SimpleMongoDbFactory(new MongoClient("localhost", port), dbName);
           return simpleMongoDbFactory;
    }

    public @Bean
    MongoTemplate mongoTemplate() throws Exception {
        MongoTemplate mongoTemplate = new MongoTemplate(mongoDbFactory());
          return mongoTemplate;
    }

@Service
@Transactional
ClientService{
   @Autowire
   private AnotherService service;
.......
public void someMethod(){
    some logic....
     service.callSomeMethod();
}

}