spring cloud micro-services practice two

In the last one, we have set up a registration center spring cloud micro service, but only one registry is not enough.
Then we have to try to provide services.

Note: This version of the development environment is a series of java1.8, spring boot2.x IDE for the Intelli IDEA.

Service Provider

Suppose we now have a demand, need an interface, when we pass a name, it will return a greeting word such as incoming body, input was hello body!.

Create a spring cloud projects

In the specific procedure is not described in detail here, you may be required to see the [spring cloud services practice two micro] contents.
The following steps:

1. Idea before selecting the directory firstCloud, right-click> New> Module, select Spring Initialzr.
2. Engineering Group
3. Project Metadata to the Group com.xingyys, Artifact isproducer
4. Direct next, until completion.

pom configuration

In the producer directory, modify pom.xml file, add dependencies:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.7.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.xingyys</groupId>
    <artifactId>producer</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>producer</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Greenwich.SR2</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

Profiles

Modify the configuration file application.properties under resources.

spring.application.name=producer

server.port=9000

eureka.client.service-url.defaultZone=http://localhost:8000/eureka/

Startup class

Modify ProducerApplication.java com.xingyys.producer under:

@SpringBootApplication
@EnableDiscoveryClient
public class ProducerApplication {

    public static void main(String[] args) {
        SpringApplication.run(ProducerApplication.class, args);
    }

}

With @EnableDiscoveryClient, it means the producer has registered the function of the service.

Add Controller

Here add a controller to provide services com.xingyys.producer / controller / HelloController.java we need:

@RestController
public class HelloController {

    @RequestMapping("/hello")
    public String hello(@RequestParam String name) {
        return "Hello " + name + " !";
    }
}

Compile and run

producer code and configuration files so that you can, the next run producer to see results:

cd producer

 mvn clean package -Dmaven.test.skip=true

 java -jar target/producer-0.0.1-SNAPSHOT.jar

访问http://localhost:9000/hello?name=xingyys,返回Hello xingyys !,表示注册成功,producer可以提供服务了.