Define the application.properties as follows-
spring:
application:
name: eureka-discovery-service
server:
port: 8083
eureka:
client:
registerWithEureka: false
fetchRegistry: false
service-url:
defaultZone: http://localhost:8083/eureka
Define the bootstrap class with the SpringBootApplication Annotation. Also here we will also be using the EnableEurekaServer annotation.
package com.javainuse;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
@SpringBootApplication
@EnableEurekaServer
public class EurekaDiscoveryApplication {
public static void main(String[] args) {
SpringApplication.run(EurekaDiscoveryApplication.class, args);
}
}
Modify First Microservice
We will be modifying
the first-service module we had developed in the previous tutorial.
The Maven project will be as follows-
In the pom.xml add the netflix eureka client dependency as follows -
<?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.javainuse</groupId>
<artifactId>first-service</artifactId>
<version>0.0.1-SNAPSHOT</version>
<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-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>#36;{spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Define the application.yml as follows-
spring:
application:
name: first-service
server:
port: 8081
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8083/eureka
Modify the FirstApplication to add the EnableEurekaClient annotation
package com.javainuse;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
@SpringBootApplication
@EnableEurekaClient
public class FirstApplication {
public static void main(String[] args) {
SpringApplication.run(FirstApplication.class, args);
}
}
Modify Second Microservice
We will be modifying
the second-service module we had developed in the previous tutorial.
In the pom.xml add the netflix eureka client dependency as follows -
The pom.xml will be as follows-
<?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.javainuse</groupId>
<artifactId>second-service</artifactId>
<version>0.0.1-SNAPSHOT</version>
<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-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>0</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Define the application.properties as follows-
spring:
application:
name: second-service
server:
port: 8082
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8083/eureka
Modify the SecondApplication to add the EnableEurekaClient annotation
package com.javainuse;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
@SpringBootApplication
@EnableEurekaClient
public class SecondApplication {
public static void main(String[] args) {
SpringApplication.run(SecondApplication.class, args);
}
}
Modify Spring Cloud Gateway Microservice using property based configuration
We will be modifying
the spring-cloud-gateway-service module we had developed in the previous tutorial.
In the pom.xml add the netflix eureka client dependency as follows -
The pom.xml will be as follows-
<?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.javainuse</groupId>
<artifactId>cloud-gateway-service</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>gateway-service</name>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>Greenwich.SR2</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-gateway</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</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>
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Define the application.yml as follows-
server:
port: 8080
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8083/eureka
spring:
application:
name: gateway-service
cloud:
gateway:
routes:
- id: employeeModule
uri: lb://FIRST-SERVICE
predicates:
- Path=/employee/**
- id: consumerModule
uri: lb://SECOND-SERVICE
predicates:
- Path=/consumer/**
Modify the APIGatewayApplication to add the EnableEurekaClient annotation
package com.javainuse;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
@SpringBootApplication
@EnableEurekaClient
public class APIGatewayApplication {
public static void main(String[] args) {
SpringApplication.run(SecondApplication.class, args);
}
}
Start the three microservices we have developed-
-
Go to url - localhost:8083/
-
Go to url - localhost:8080/employee/message
-
Go to url - localhost:8080/consumer/message
Modify Spring Cloud Gateway Microservice using Java based configuration
We will be modifying
the spring-cloud-gateway-service module we had developed in the previous tutorial.
In the pom.xml add the netflix eureka client dependency as follows -
The pom.xml will be as follows-
<?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.javainuse</groupId>
<artifactId>cloud-gateway-service</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>gateway-service</name>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>Greenwich.SR2</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-gateway</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</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>
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Define the application.yml as follows-
server:
port: 8080
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8083/eureka
Create the Spring Cloud Configuration for cloud gateway as follows-
package com.javainuse.config;
import org.springframework.cloud.gateway.route.RouteLocator;
import org.springframework.cloud.gateway.route.builder.RouteLocatorBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class SpringCloudConfig {
@Bean
public RouteLocator gatewayRoutes(RouteLocatorBuilder builder) {
return builder.routes()
.route(r -> r.path("/employee/**")
.uri("lb://FIRST-SERVICE")
.id("employeeModule"))
.route(r -> r.path("/consumer/**")
.uri("lb://SECOND-SERVICE")
.id("consumerModule"))
.build();
}
}
Modify the APIGatewayApplication to add the EnableEurekaClient annotation
package com.javainuse;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
@SpringBootApplication
@EnableEurekaClient
public class APIGatewayApplication {
public static void main(String[] args) {
SpringApplication.run(SecondApplication.class, args);
}
}
Start the three microservices we have developed-
-
Go to url - localhost:8083/
-
Go to url - localhost:8080/employee/message
-
Go to url - localhost:8080/consumer/message
Download Source Code
Download it -
Spring Cloud Eureka Discovery service
Spring Boot First Microservice
Spring Boot Second Microservice
Spring Cloud Gateway Microservice using property config
Spring Cloud Gateway Microservice using java config
See Also
Spring Boot Hello World Application- Create simple controller and jsp view using Maven
Spring Boot Tutorial-Spring Data JPA
Spring Boot + Simple Security Configuration
Pagination using Spring Boot Simple Example
Spring Boot + ActiveMQ Hello world Example
Spring Boot + Swagger Example Hello World Example
Spring Boot + Swagger- Understanding the various Swagger Annotations
Spring Boot Main Menu
Spring Boot Interview Questions
