vehicle-signal-decoding

README

vehicle-signal-decoding

Api for managing vehicle signal decoding on the DIMO platform.

Developing locally

To download postgres:

brew install postgresql
pg_ctl -D /usr/local/var/postgres start && brew services start postgresql

If postgres is already installed, go ahead and create database in postgres.

psql postgres
create user dimo PASSWORD 'dimo';
grant dimo to postgres;
create database vehicle_signal_decoding_api
    with owner dimo;

Open postgres database in DataGrip to view schema, tables, etc.

TL;DR

cp settings.sample.yaml settings.yaml
docker compose up -d
go run ./cmd/vehicle-signal-decoding migrate
go run ./cmd/vehicle-signal-decoding

Regenerate swagger docs

swag init -g cmd/vehicle-signal-decoding/main.go --parseDependency --parseInternal --generatedTime true

Generating gRPC client and server code

1. Install the protocol compiler plugins for Go using the following commands

brew install protobuf
go install google.golang.org/protobuf/cmd/protoc-gen-go
go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest

1. Run protoc in the root directory

protoc --go_out=. --go_opt=paths=source_relative \
    --go-grpc_out=. --go-grpc_opt=paths=source_relative \
    pkg/grpc/*.proto

Linting

brew install golangci-lint

golangci-lint run

This should use the settings from .golangci.yml, which you can override.

If brew version does not work, download from https://github.com/golangci/golangci-lint/releases (darwin arm64 if M1), then copy to /usr/local/bin and sudo xattr -c golangci-lint

Database ORM

This is using sqlboiler. The ORM models are code generated. If the db changes, you must update the models.

Make sure you have sqlboiler installed:

go install github.com/volatiletech/sqlboiler/v4@latest
go install github.com/volatiletech/sqlboiler/v4/drivers/sqlboiler-psql@latest

To generate the models:

sqlboiler psql --no-tests --wipe

Make sure you're running the docker image (ie. docker compose up)

If you get a command not found error with sqlboiler, make sure your go install is correct. Instructions here

Adding migrations

To install goose in GO:

$ go get github.com/pressly/goose/v3/cmd/goose@v3.5.3
export GOOSE_DRIVER=postgres

To install goose CLI:

$ go install github.com/pressly/goose/v3/cmd/goose
export GOOSE_DRIVER=postgres

Have goose installed, then:

goose -dir internal/infrastructure/db/migrations create slugs-not-null sql

Local development

Importing data: Device definition exports are here You can use sqlboiler to import or this command:

psql "host=localhost port=5432 dbname=vehicle_signal_decoding_api user=dimo password=dimo" -c "\COPY vehicle_signal_decoding_api.integrations (id, type, style, vendor, created_at, updated_at, refresh_limit_secs, metadata) FROM '/Users/aenglish/Downloads/drive-download-20221020T172636Z-001/integrations.csv' DELIMITER ',' CSV HEADER"

Starting Kafka locally

$ brew services start kafka $ brew services start zookeeper

This will use the brew services to start kafka locally on port 9092. One nice thing of this vs. docker-compose is that we can use this same instance for all our different locally running services that require kafka.

Produce some test messages

$ go run ./cmd/test-producer

In current state this only produces a single message, but should be good enough starting point to test locally.

Create decoding topic

kafka-topics --create --bootstrap-server localhost:9092 --replication-factor 1 --partitions 1 --topic topic.dbc.decoding

Sample read messages in the topic

kafka-console-consumer --bootstrap-server localhost:9092 --topic topic.dbc.decoding --from-beginning