Micronaut

Question

我有一个使用@client 注释编写的 Micronaut 声明式 HTTP 客户端。我想在创建 ApplicationContext itslef 之前启动 micronaut 应用程序时调用它。

HTTP 客户端：SampleHttpClient.java

import io.micronaut.http.HttpResponse;
import io.micronaut.http.MediaType;
import io.micronaut.http.annotation.Get;
import io.micronaut.http.annotation.Header;
import io.micronaut.http.client.annotation.Client;

@Client("http://127.0.0.1:8200")
@Header(name = "X-Vault-Token", value = "hvs.CEGT7cKyMA8wsDbgKZqxC34q")
public interface SampleHttpClient {
    @Get(value = "/v1/kv/data/KMS", produces = MediaType.APPLICATION_JSON)
    HttpResponse<String> getVaultSecret();
}

Application.java（主要class）

import io.micronaut.context.ApplicationContext;
import io.micronaut.runtime.Micronaut;

public class Application {
    public static void main(String[] args) {

        // Following code works perfect. I am creating context here. But I dont want to do this
        SampleHttpClient client = Micronaut.run(Application.class, args).
                getBeansOfType(SampleHttpClient.class).stream().findFirst().get();
        System.out.println("Response Body ="+client.getVaultSecret().body());
   
        // How do we get the instance of SampleHttpClient without using Micronaut's dependency 
injection process???

    }
}

Answer 1

I want to call this while starting micronaut app before creating the ApplicationContext itslef.

Micronaut 不提供支持该功能的机制。您可以编写自己的实例来实例化 bean，但这是一项艰巨的任务。您将编写自己的 bean 容器。

Micronaut - 在不创建 ApplicationContext 的情况下创建一个 bean

Micronaut - Create a bean without creating ApplicationContext

java

dependency-injection

inversion-of-control