This demo showcases how to use Hangfire for executing recurring jobs and triggering immediate executions while preventing multiple instances of the same job from running simultaneously across multiple server instances.
- MongoDB Setup (Optional): If using Mongo, ensure it's running locally with settings specified in appsettings.json. Modify the file accordingly or run Mongo using:
docker run --restart always -d -p 27017:27017 -h $env:COMPUTERNAME --name mongo mongo:4.2.8 --replSet=EtnReplicaSet ; Start-Sleep -Seconds 1 ; docker exec mongo mongo --eval "rs.initiate();"- PostgreSQL Setup (Alternative to Mongo): Alternatively, for PostgreSQL, execute:
docker run --restart always --name postgresql -p 5432:5432 -e POSTGRES_USER=postgres -e POSTGRES_PASSWORD=postgres -e POSTGRES_INITDB_ARGS="--lc-collate='en_US.UTF-8' --lc-ctype='en_US.UTF-8'" -d postgres:12.16- Choose Storage Implementation:
Modify the storage implementation in Program.cs by changing:
var storageImplementation = StorageImplementation.Mongo;to either:
var storageImplementation = StorageImplementation.Mongo; // for MongoDBor
var storageImplementation = StorageImplementation.Postgres; // for PostgreSQL- Running Instances:
Navigate to the /Api folder and open separate consoles for each instance. Execute the following commands in each, ensuring different ports for each instance:
dotnet run --urls=http://localhost:5001/dotnet run --urls=http://localhost:5002/- Testing:
Access the /Jobs endpoint on any active server. The DoSomething job should execute without overlapping with another instance of the same job.