JAlgoArena Judge Agent
JAlgoArena Judge Agent is heart of JAlgoArena platform. It is responsible for generation of skeleton code as well as judging submissions based on requirements specified in problem definition.
Demo: https://jalgoarena-ui.herokuapp.com/
Introduction
- JAlgoArena Judge Agent can be easily scalable - it's stateless and together with Eureka and API using Ribbon load balancer gives unlimited way to scale judgement capability
- It supports Kotlin and Java
- JAlgoArena Judge Agent is generating skeleton code for particular problem - based on meta data received from Problems Service
- It judges correctness of the solution based on the pre-specified test cases as well as time and memory limits
- It's using simple heuristic to calculate time and memory results - running in couple iteration and looking for best results makes the judgement itself more predictable and repeatable
REST API
Endpoint | Description |
---|---|
GET /problems | Get problems list |
GET /problems/:id | Get problem by id |
POST /problems/:id/submit | Post problem solution to judge |
Components
- JAlgoArena
- JAlgoArena UI
- JAlgoArena Judge
- JAlgoArena Problems
- JAlgoArena Eureka Server
- JAlgoArena API Gateway
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
- application is deployed into Heroku machine
Infrastructure
- Heroku (PaaS)
- Kotlin Compiler (K2JVMCompiler), MemoryClassLoader, MemoryJavaCompiler
- Spring Boot, Spring Cloud (Eureka Client)
- TravisCI - https://travis-ci.org/spolnik/JAlgoArena-Judge
Running locally
There are two ways to run it - from sources or from binaries.
- Default port:
8080
Running from binaries
- go to releases page and download last app package (JAlgoArena-Judge-[version_number].zip)
- after unpacking it, go to folder and run
./run.sh
- you can modify port Eureka service url 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-Judge
to clone locally the sources - now, you can build project with command
./gradlew clean bootRepackage
which will create runnable jar package with app sources. Next, runjava -Dserver.port=8080 -classpath "lib/*" -jar build/libs/jalgoarena-auth-*.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