prakashn27 / codeforces-ranking-notification-system

Subscribe to one or more users(friends) for ranking changes; notification system for change in rank of particular user;

codeforces-ranking-notification-system

• Subscribe to one or more users(friends) for ranking changes
• Notify if there is a change in rank of our friends
• Out of scope: Authentication, UI

Architecture Diagram

Overview of Architecture:

• Data resides in sql server instance of docker
• Message broker used is Rabbitmq instance of docker
• SMTP server is used to check the delivery of messages
• UserManagementApi and FollowerManagementApi are dotnet webapi projects used to add data to our DB.
• ParseContestApi is also a dotnet core webapi project which parses the ranking changes of a contest
• All the ranking changes are updated in queue Rank
• CreateNotification gets the each user in rank queue and creates a notification for all of its followers and updates it to Notification queue.
• SendNotification fetches the data from Notification queue and sends mail for each notification.

Run

./StartSolution.sh starts all the projects currently from docker compose.

Debug

1. To debug individual project, stop that particular project using docker-compose stop {projectname}.
2. Run the project in development mode, using visual studio code.

QuickLinks after starting the project:

Following links are enabled after starting the project.

• RabbitMQ web
• MailDev

Docker Images (available in docker hub):

• usermanagementapi
• followermanagementapi

Videos worth watching:

• Intro to rabbitmq
• Edwin Van Wijk talk on .net core Architecture