##This repo contains the source code of a Twitter Message Broker application.

The back-end was written using Java with Spring Boot.

Running the Application

First create a docker network:

$ docker network create twitter

Then check if was successfully created:

$ docker network ls

Download Redis image

$ docker pull redis:4.0.9-alpine

Then check if was successfully downloaded:

$ docker images

Run the container:

$ docker run -d --name redis --net twitter -p 6379:6379 redis:4.0.9-alpine

Install the Windows Subsystem for Linux to install redis-cli on it.

Open PowerShell as Administrator and run:

$ Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Windows-Subsystem-Linux

Restart your computer when prompted.

Install your Linux Distribution of Choice

Install Ubuntu 18.04 from Microsoft Store or from the command-line.

Install redis-cli

Download and install using WSL

$ sudo apt install redis-tools -y

Connect with the server. First discover docker machine ip:

 $ docker-machine ip

Then connect:

$ redis-cli -h _MACHINE_IP_

In the src/main/resources directory you can find a file called application.yaml.

Open this file and enter your Redis server host and port string as directed in the comment. This is the information the driver will use to connect.

host: 192.168.99.100
port: 6379

Run the application with maven:

$ mvn spring-boot:run

Create the docker image

$ mvn clean install docker:build

Check for image:

$ docker images

Run the container

$ docker run -d --name tracked-hashtag --net twitter -p 9090:9090 filipebezerra/tracked-hashtag

Now we can test the API using Postman or curl.

Using curl to POST something:

$ curl -H "Content-Type: application/json" -X POST -d '{"hashTag": "go", "queue": "go"}' http://_MACHINE_IP_:9090/api/tracked-hash-tag

Using curl and jq to GET something:

$ curl http://_MACHINE_IP_:9090/api/tracked-hash-tag | jq '.'