Spring依赖注入与构造函数参数

Question

I have spring boot, hibernate application and android application for client side. Also I am using java.net.Socket api for socket connection. Before I was creating server socket like this new Server(12346); and everything was good enough. But now I need access to database from socket class eg with @Autowired UsersDao field, but of course it is null because Socket class is not visible by Spring Framework. So how do I make dependency injection on Socket class using port as constructor argument and make UserDao non-null?

Answer 1

You can access the Spring Application Context from static method and use this static method to load your repository bean in your Server class instead of autowiring it.

You need to create the following classes (found here ):

ApplicationContextProvider

@Component
public class ApplicationContextProvider implements ApplicationContextAware {

    private static ApplicationContext context;

    public ApplicationContext getApplicationContext() {
        return context;
    }

    @Override
    public void setApplicationContext(ApplicationContext ctx) {
        context = ctx;
    }
}

SpringConfiguration

@Configuration
public class SpringConfiguration {

    @Bean
    public static ApplicationContextProvider contextProvider() {
        return new ApplicationContextProvider();
    }

}

And then your non-Spring managed Server class:

public class Server {
    //your code

    public void doUsersDaoStuff() {
        UsersDao usersDao = (UsersDao) SpringConfiguration.contextProvider().getApplicationContext().getBean("UsersDao");
        // Do your own stuff with UsersDao here...
    }
}