spring-boot-api-gateway

API Gateway using Spring Cloud's Gateway Starter for Getting Started with Spring Boot demo

1 - Spring Intializr Creation

I used the following at http://start.spring.io to create the Gateway Server application.

• Build tool - Gradle
• Language - Java
• Spring Boot Version - 2.0.0.RC1
• Group = com.scmc
• Artifact = boot-demo-gateway-server
• Name = boot-demo-gateway-server
• Package Name = com.scmc.bootdemo.gateway
• Packaging = JAR
• Java Version = 1.8
• Dependencies = Actuator, Gateway, Redis, Hystrix, Eureka Discovery, Reactive Web

2 - Config Server Updates

2.1 - Update Application Class

In the class BootDemoGatewayServerApplication, I added the following annotation to enable discovery:

@EnableDiscoveryClient

Then, I defined the following bean to allow for automatic discovery of routes via Eureka.

@Bean
	DiscoveryClientRouteDefinitionLocator discoveryRoutes(DiscoveryClient discoveryClient) {
		return new DiscoveryClientRouteDefinitionLocator(discoveryClient);
	}

2.2 - Update Application Properties

I added the following application properties:

server.port=9001 spring.application.name=gateway-service spring.cloud.gateway.discovery.locator.enabled=true spring.jackson.serialization.indent_output=true management.endpoints.web.expose=*

• This changes the port where the gateway server will be running on.
• I've specified the name of the gateway service application.
• I'm enabling this application for discovery services.
• I'm indenting JSON for pretty print in actuator output
• I'm enabling all management endpoints.

3 - Running the Server

To run the gateway server, simply use the command:

.\gradlew bootRun

4 - More Information

• Spring's page on Spring Cloud Gateway is found here: https://cloud.spring.io/spring-cloud-gateway/