JAlgoArena Events

JAlgoArena Events microservice to publish Events via WebSocket STOMP messages

• Introduction
• WS API
• Components
• Continuous Delivery
• Infrastructure
• Running Locally
• Notes

Introduction

• JAlgoArena Events is responsible for collecting from Kafka events and publishing them via via WebSocket API

WS API

Endpoint	Description
WS/SockJS [/events-websocket]	WebSocket endpoint, uses SockJS/WS
[/topic/events]	Topic to subscribe for events

Stomp Events

• refresh ranking
• refresh user submissions

Components

• JAlgoArena
• JAlgoArena UI

Continuous Delivery

• initially, developer push his changes to GitHub
• in next stage, GitHub notifies Travis CI about changes
• Travis CI runs whole continuous integration flow, running compilation, tests and generating reports
• coverage report is sent to Codecov

Infrastructure

• Spring Boot, WebSockets
• TravisCI - https://travis-ci.org/spolnik/JAlgoArena-Events
• Apache Kafka

Running locally

There are two ways to run it - from sources or from binaries.

• default port: 5005

Running from binaries

• go to releases page and download last app package (JAlgoArena-Events-[version_number].zip)
• after unpacking it, go to folder and run ./run.sh (to make it runnable, invoke command chmod +x run.sh)
• you can modify port in run.sh script, depending on your infrastructure settings. The script itself can be found in here: run.sh

Running from sources

• run git clone https://github.com/spolnik/JAlgoArena-Events to clone locally the sources
• now, you can build project with command ./gradlew clean stage which will create runnable jar package with app sources. Next, run java -jar build/libs/jalgoarena-events-*.jar which will start application
• there is second way to run app with Gradle. Instead of running above, you can just run ./gradlew clean bootRun

Notes

• Travis Builds