The freestyle RPC project http://frees.io/docs/rpc has an example project demonstrating a GRPC based micro service that uses a Doobie based persistence layer.
I have created a set of templates that can give developers a head start in setting up Sbt builds for a real world set of services based on this set of examples.
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| https://github.com/jmjava |
To use the templates you must first install java8 and sbt.
I found this gist that shows how to do this on Ubuntu 16.04
Once you have SBT installed you can use the templates to create your working set of projects.
Follow these steps:
mkdir prototype
cd prototype
sbt new /jmjava/freestyle-lib-template.g8
cd freestylelib
sbt publishLocal
cd ../
sbt new jmjava/freestyle-rpc-protocol-template.g8 (accept defaults for prompts)
cd freestyleprotocol
sbt publishLocal
cd ../
sbt new jmjava/freestyle-rpc-runtime-template.g8
cd freestyleruntime
sbt publishLocal
cd ../
sbt new jmjava/freestyle-rpc-server-template.g8
cd freestyleserver
sbt compile
sbt run
-- open a new terminal
sbt new jmjava/freestyle-rpc-client-template.g8
cd freestyleclient
sbt compile
sbt run
You should see messages going between client and debug messages in the server log from the Hikari pool.
In part 2 we will explore deploying the server to a Kubernetes / Istio setup.
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