Table of contents

1. Introduction
2. Main Project
   1. Requirements
   2. Build Instructions
   3. Run Instructions
   4. Docker Compose
3. Sub Modules
   1. Database
   2. Front End
   3. News Server Java
   4. Database Service Java
   5. News Server Groovy
   6. News Server JavaScript
   7. News Server Ruby

VertxDemo

This project aims to demonstrate a minimal working asynchronous microservice architecture, using Vert.x and Docker as the main technological choices.

The projects show how to:

• Start a custom MySql container that starts with a pre-defined schema and data.
• Deploy a simple set of microservices using Vert.x and demonstrating the polyglot abilities of that framework.
• Deploy a frontend that receives updates from the different microservices over an event bus.
• Have a database service accessible from the other services, but using Vert.x proxy class technology.
• Inject external properties in a Docker container to expose them as system properties.
• Access injected Docker properties from the database service.
• Use both Dockerfile and Maven for starting Docker containers.
• Use docker-compose to start all services as well as the needed database.

All modules will be packaged as fat jars and are runnable as such, but it's recommended to setup and use Docker

Requirements

Using Docker is highly recommended. You can install it using the instructions for your OS found here https://docs.docker.com/v1.8/installation/ .

Running the Docker container locally, at least on OSX, might compromise your network interfaces and making the normal java -jar xxx -cluster usage not work. Just a heads up. Running everything inside of Docker should work fine (the issue is related to port bindings and Vert.x usage of Hazelcast for setting up discovery etc).

If you don't want to use Docker, you will need a Java 1.8 environment and setup MySql manually.

Build Instructions

• From the root run: mvn clean install . This makes sure you push everything to your local maven repos. If no changes have been made to db-service-java then mvn clean package should be enough.

• Use mvn docker:build to create Docker images for all Maven modules.

• If you have setup a remote Docker repository (Docker Hub, for example), with proper user settings, you can push your image with mvn docker:push.

Run Instructions

• Start your custom MySql container. Please see documentation here README.md

• From the root run: mvn docker:start. This will initialize all Docker containers for all Maven modules.

• Check your Docker container for it's ip and access frontend at that address i.e. http://xxx.xxx.xxx.xxx:8080.

• mvn docker:stop will tear all the Docker containers.

• It's also possbile to use the fat-jars directly for each respective module, for example: java -jar target/news-server-rb-1.0-SNAPSHOT-fat.jar -cp target/classes -cluster

Docker Compose

• A simple docker-compose setup exists in the project root. While standing in root, calling docker-compose up will start all modules, as well as the database, using the Dockerfile files as settings. docker-compose down stops and removes all containers.
• If you want to repackage everything: mvn clean install package followed by docker-compose build.