在 Micronaut 应用程序中使用 Spring Bean

Question

我一直在寻找这样的东西。

拥有这个 micronaut 应用程序代码

@Configuration
@SpringBootApplication(exclude = {org.springframework.boot.autoconfigure.cassandra.CassandraAutoConfiguration.class,
        org.springframework.boot.autoconfigure.amqp.RabbitAutoConfiguration.class,
        org.springframework.boot.autoconfigure.mongo.MongoAutoConfiguration.class,
        org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration.class})
@ComponentScan(basePackageClasses = HelloController.class)
public class Application {

    public static void main(String[] args) throws Exception {

        System.setProperty("akka.config", "/Users/nb38tv/workspace/hello-micronaut/src/main/resources/config/");
        System.setProperty("akka.config.file", "application.conf");
        ConfigurableApplicationContext springContext = ReactiveConnectorBootable.loadReactiveConnector();

        ConfigurableApplicationContext context = new MicronautApplicationContext();
        context.setParent(springContext);
        context.start();

        Micronaut.run(Application.class);

    }

}

如何将 Spring 的 ApplicationContext 与 Micronaut 合并。

我需要它，因为我有一个使用 Spring 的 ApplicationContext 注入一些 bean 的库。

然后在我的控制器中我需要使用它。

@Controller("/hello")
public class HelloController {

    @Inject
    private ReactorConnectorManager<RequestInfoDTO, String> reactorConnectorRestManagerExecutor;

    @Get(produces = MediaType.TEXT_PLAIN)
    public String index() {
        if(reactorConnectorRestManagerExecutor == null){
            return "boooo";
        }
        return "Hello World";
    }
}

其中ReactorConnectorManager 是Spring context 中加载的bean

问候

Answer 1

你可以查看this有一个如何集成Micronaut with Spring的例子

我创建了一个基于this 的简单应用程序，代码如上。 例如在http://localhost:8080/hello/World 上，它返回：Hello World with Test : World and Test : World。所以看起来Controller 使用了Bean。

package greeting.example;

import io.micronaut.runtime.Micronaut;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;

import java.util.function.Function;

@SpringBootApplication
public class Application {

    public static void main(String... args) {
        Micronaut.run(Application.class);
    }

    @Bean
    Function<String, String> stringService(){
        return (value) -> "Test : "+ value;
    }
}

和

package greeting.example;

import io.micronaut.http.MediaType;
import io.micronaut.http.annotation.Controller;
import io.micronaut.http.annotation.Get;
import io.reactivex.Single;

import javax.inject.Inject;
import java.util.function.Function;

@Controller("/")
public class HelloController {

    @Inject
    Function<String, String> stringService;

    @Autowired
    private ApplicationContext applicationContext;

    @Get(uri = "/hello/{name}", produces = MediaType.TEXT_PLAIN)
    public Single<String> hello(String name) {
        Function<String, String> service =  applicationContext.getBean(Function.class);
        return Single.just("Hello " + name + " with " + stringService.apply(name)
                + " and " + service.apply(name));
    }
}

更新

允许访问 ConfigurableApplicationContext context 的 hack。在Application 创建类似单例的东西，或者在我的示例静态字段中保存你的context：

static ConfigurableApplicationContext springContext;

...

ConfigurableApplicationContext springContext = ReactiveConnectorBootable.loadReactiveConnector();

然后在你的HelloController:

@Get(produces = MediaType.TEXT_PLAIN)
public String index() {
    ReactorConnectorManager<RequestInfoDTO, String> reactorConnectorRestManagerExecutor =
            Application.springContext.getBean(ReactorConnectorManager<RequestInfoDTO, String>.class);
    if(reactorConnectorRestManagerExecutor  == null){
        return "boooo";
    }
    return "Hello World";
}