norman

Realtime distributed OLAP datastore, designed to answer OLAP queries with low latency written in Go

Swagger

To generate the swagger definition run

swag init -d "./internal/commander"
swag init -d "./internal/broker"

cURLs requests for testing

To create a new Schema

curl -X POST -H "Content-Type: application/json" -d @test/commander/create_schema_flights.json http://localhost:8080/commander/v1/tenants/default/schemas

Kafka initialization

Create a topic for testing the ingestion job

$ docker exec -it kafka bash
[appuser@kafka]# cd /
[appuser@kafka]# cd bin
[appuser@kafka]# ./kafka-topics --create --topic test-events --bootstrap-server localhost:9092
[appuser@kafka]# ./kafka-topics --describe --topic test-events --bootstrap-server localhost:9092

Now, let's write some events into the topic

[appuser@kafka]# ./kafka-console-producer --topic test-events --bootstrap-server localhost:9092

Copy the following JSON lines

{"studentID":205,"firstName":"Natalie","lastName":"Jones","gender":"Female","subject":"Maths","score":3.8,"timestampInEpoch":1571900400000}
{"studentID":205,"firstName":"Natalie","lastName":"Jones","gender":"Female","subject":"History","score":3.5,"timestampInEpoch":1571900400000}
{"studentID":207,"firstName":"Bob","lastName":"Lewis","gender":"Male","subject":"Maths","score":3.2,"timestampInEpoch":1571900400000}
{"studentID":207,"firstName":"Bob","lastName":"Lewis","gender":"Male","subject":"Chemistry","score":3.6,"timestampInEpoch":1572418800000}
{"studentID":209,"firstName":"Jane","lastName":"Doe","gender":"Female","subject":"Geography","score":3.8,"timestampInEpoch":1572505200000}
{"studentID":209,"firstName":"Jane","lastName":"Doe","gender":"Female","subject":"English","score":3.5,"timestampInEpoch":1572505200000}
{"studentID":209,"firstName":"Jane","lastName":"Doe","gender":"Female","subject":"Maths","score":3.2,"timestampInEpoch":1572678000000}
{"studentID":209,"firstName":"Jane","lastName":"Doe","gender":"Female","subject":"Physics","score":3.6,"timestampInEpoch":1572678000000}
{"studentID":211,"firstName":"John","lastName":"Doe","gender":"Male","subject":"Maths","score":3.8,"timestampInEpoch":1572678000000}
{"studentID":211,"firstName":"John","lastName":"Doe","gender":"Male","subject":"English","score":3.5,"timestampInEpoch":1572678000000}
{"studentID":211,"firstName":"John","lastName":"Doe","gender":"Male","subject":"History","score":3.2,"timestampInEpoch":1572854400000}
{"studentID":212,"firstName":"Nick","lastName":"Young","gender":"Male","subject":"History","score":3.6,"timestampInEpoch":1572854400000}

Read the events for testing

[appuser@kafka]# ./kafka-console-consumer --topic test-events --from-beginning --bootstrap-server localhost:9092

If you see the events, you are done!

Ingest few thousands lines

Copy the file to the kafka running container

docker cp test/data/transcript.jsonl kafka:/home/appuser/transcript.json

Execute the ingestion job to create the Kafka consumer and prepare Norman for ingesting events (see the steps below) and then push these messages to the kafka topic with the following command

[appuser@kafka]# ./kafka-console-producer --topic test-events --bootstrap-server localhost:9092 < /home/appuser/transcript.json

Run the ingestion job

Create the schema in Norman

curl -X POST -H "Content-Type: application/json" -d @test/commander/create_schema_transcript.json http://localhost:8080/commander/v1/tenants/default/tables

Create the ingestion job