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micronaut 学习 二 创建一个简单的服务

时间:2019-10-17 17:54:18      阅读:118      评论:0      收藏:0      [点我收藏+]

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micronaut 提供的cli 很方便,我们可以快速创建具有所需特性的应用,以下是一个简单的web server app

创建命令

mn create-app hello-world

效果

mn create-app hello-world
| Generating Java project...
| Application created at /Users/dalong/mylearning/micronaut-project/hello-world

启动服务

./gradlew run

添加简单代码

src/main/java/hello/world/HelloController.java

package hello.world;
import io.micronaut.http.MediaType;
import io.micronaut.http.annotation.Controller;
import io.micronaut.http.annotation.Get;
?
@Controller("/hello") 
public class HelloController {
?
    @Get(produces = MediaType.TEXT_PLAIN) 
    public String index() {
        return "Hello World"; 
    }
}
 

访问效果

curl http://localhost:8080/hello
Hello World%
 

集成测试

  • 测试controller
    使用httpclient
package hello.world;
import io.micronaut.context.annotation.Property;
import io.micronaut.http.HttpRequest;
import io.micronaut.http.client.HttpClient;
import io.micronaut.http.client.annotation.Client;
import io.micronaut.runtime.server.EmbeddedServer;
import io.micronaut.test.annotation.MicronautTest;
import org.junit.jupiter.api.Test;
?
import javax.inject.Inject;
?
import static org.junit.jupiter.api.Assertions.assertEquals;
?
@MicronautTest
class HelloControllerSpec {
    @Inject
    EmbeddedServer server; 
?
    @Inject
    @Client("/")
    HttpClient client; 
?
    @Test
    void testHelloWorldResponse() {
        String response = client.toBlocking() 
                .retrieve(HttpRequest.GET("/hello"));
        assertEquals("Hello World", response); //)
    }
}
  • 测试service
package hello.world;
?
import io.micronaut.test.annotation.MicronautTest;
import javax.inject.Inject;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
?
@MicronautTest
public class HelloClientSpec {
?
    @Inject
    HelloClient client;
?
    @Test
    public void testHelloWorldResponse(){
        assertEquals("Hello World", client.hello().blockingGet());
    }
}
 
 

打包应用

./gradlew assemble 

效果

技术图片

 

 

部署打包软件

java -jar build/libs/hello-world-0.1-all.jar 
 

效果:

hello-world java -jar build/libs/hello-world-0.1-all.jar 
16:20:24.013 [main] INFO io.micronaut.runtime.Micronaut - Startup completed in 2009ms. Server Running: http://localhost:8080

docker 运行

默认micronaut 生成的项目包含了一个dockerfile ,我添加了一个docker-compose 文件
dockerfile

 
FROM adoptopenjdk/openjdk11-openj9:jdk-11.0.1.13-alpine-slim
COPY build/libs/hello-world-*-all.jar hello-world.jar
EXPOSE 8080
CMD java -Dcom.sun.management.jmxremote -noverify ${JAVA_OPTS} -jar hello-world.jar
 
version: "3"
services:
  app:
     image: dalongrong/micronaut-hello-world
     build: ./
     ports:
     - "8080:8080"

运行&&效果

docker-compose up -d
 

效果:

Creating network "hello-world_default" with the default driver
Building app
Step 1/4 : FROM adoptopenjdk/openjdk11-openj9:jdk-11.0.1.13-alpine-slim
jdk-11.0.1.13-alpine-slim: Pulling from adoptopenjdk/openjdk11-openj9
4fe2ade4980c: Pull complete
1ba2a07c78f2: Pull complete
944724f145c9: Pull complete
1cb512dae36f: Pull complete
Digest: sha256:60718fa9eb6b6bc4ab6fe7f3a9db31b8725fb63ebdda833a43f541c07792ff5c
Status: Downloaded newer image for adoptopenjdk/openjdk11-openj9:jdk-11.0.1.13-alpine-slim
 ---> f3f4b8ddca6f
Step 2/4 : COPY build/libs/hello-world-*-all.jar hello-world.jar
 ---> b794f9b8e0d4
Step 3/4 : EXPOSE 8080
 ---> Running in d3e19ae06642
Removing intermediate container d3e19ae06642
 ---> 2f4abdc6ddfd
Step 4/4 : CMD java -Dcom.sun.management.jmxremote -noverify ${JAVA_OPTS} -jar hello-world.jar
 ---> Running in 5958c2868e24
Removing intermediate container 5958c2868e24
 ---> 44c4289cb2b6
Successfully built 44c4289cb2b6
Successfully tagged dalongrong/micronaut-hello-world:latest
WARNING: Image for service app was built because it did not already exist. To rebuild this image you must use `docker-compose build` or `docker-compose up --build`.
Creating hello-world_app_1 ... done

访问:

curl http://localhost:8080/hello 
Hello World% 

参考资料

https://docs.micronaut.io/snapshot/guide/index.html
https://github.com/rongfengliang/micronaut-hello-world

micronaut 学习 二 创建一个简单的服务

标签:host   int   ati   lib   turn   gen   创建   opera   mirror   

原文地址:https://www.cnblogs.com/rongfengliang/p/11693060.html

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