The purpose of this sample application is to demonstrate how to build highly scalable and concurrent streaming service using Spring boot, AKKA actor and Project Reactor.
To run the service locally, please follow the below steps -
-
Pass the VM argument
reactor.netty.ioWorkerCount. This the worker thread count of reactor netty event loop. In myApple-M1 8 core macbook, I'd set it as 20 and got a good performance in r2dbc -
Since this service stores the incoming events to a mssql database, it attempts to connect to mssql db at startup. Please make sure to provide a valid database details in
application.properties.
Remember to create a new database named asakka_demobefore starting the service.
You can also run a dockerized mssql in your local using the below command -
docker run -e "ACCEPT_EULA=1" -e "MSSQL_SA_PASSWORD=<YOUR_CHOICE_PASSWORD>" -e "MSSQL_PID=Developer" -e "MSSQL_USER=<YOUR_CHOICE_USERNAME>" -p 1433:1433 -d --name=sql mcr.microsoft.com/azure-sql-edgeUpdate the above chosen username and password in
application.properties -
This service use NATS jetstream as a sink for ACK publish. It uses the below default NATS configs through spring properties -
nats.server=nats://localhost:4222
nats.stream=akka-demo
nats.subject=akka-demo-ack-events
To run NATS streaming server in local, use the below command -
docker run -ti -p 4222:4222 --name jetstream synadia/jsm:latest server