Sample-microservices

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Introduction

A sample microservice using spring-boot and spring-cloud.

In this project there are four applications:

• EurekaApplication. This application is the Server Discovery of this sample microservice, which all the other applications are going to connect with. The path to connect with the server is "http://localhost:8011"

• CloudConfigApplication. This application is the Server Configuration, it is connected with a Github project, which contains configuration file from the other application servers.

• App1Application - This application has a controller that returns a simple response, whose values are in its application.yml file.

• App2Aplication - This application has a controller which by feign call the App1Application controller and returns its response.

This program was created hoping that it can explain how to create a microservice using Java, Spring Boot and Spring Cloud Netflix. There are a lot of other tools that could be used to create or to improve this program, but that is not the goal. The goal is to show how to create a basic microservice for those who want to learn how to develope a simple microservice.

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Prerequisites

Required software components to run the program:

• MVN (Apache Maven)
• JDK 8 (Java Development Kit version 8)

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Building

Install the softwares prerequired.

• Install the JDK 8 and MVN correctly and set the required environment variables of both softwares.

Build the application

• Inside the "samplemicroservice" folder has a .pom file. Get into this folder and type the command 'mvn clear install".

• This is a maven command that make the maven download all the library necessary to run the program (you need to be connected on the internet in order to work).

• After successfully executing the mvn command, it should have created a folder named "target" in every application. Inside the folder there will be a ".jar" file.

Expected Output

[INFO] sample-microservice 1.0-SNAPSHOT ......... SUCCESS

[INFO] microservice-configuration ........................ SUCCESS

[INFO] eureka-server ............................................ SUCCESS

[INFO] app1 .......................................................... SUCCESS

[INFO] app2 1.0-SNAPSHOT .................................. SUCCESS

[INFO] -------------------------------------------------------------------------

[INFO] BUILD SUCCESS

[INFO] -------------------------------------------------------------------------

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Running the applicatin

To run the application, type the command "java -jar <jar's file name>". To not occur any error, execute the command in this order:

• EurekaApplication
• CloudConfigApplication
• App1Application
• App2Application

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Authors

• Leandro Palermo