play-binding-petstore

A Single Page Application SPA that demos how are things done with this stack:

• Server: Scala / Play
• Shared: Scala
• Client: ScalaJS / Binding.scala

Next to that I use it for experimenting with stuff I need for work, like Kafka.

Work is in progress and there are lots of loose ends!

Web Client

• Run the client:

  sbt run

• There are 3 Users (password anything):

  • demoAdmin
  • demoCustomer
  • demoManager

Postgres

You need Docker running. Then run:

docker run --rm -P -p 127.0.0.1:5432:5432 -e POSTGRES_PASSWORD="3sf2reRer" --name postgres -d postgres

And here is how you connect:

psql postgresql://postgres:3sf2reRer@localhost:5432/postgres

Or with Doobie:

  protected val xa: Aux[IO, Unit] = Transactor.fromDriverManager[IO](
    "org.postgresql.Driver",
    "jdbc:postgresql://localhost/postgres",
    "postgres",
    "3sf2reRer"
  )

Kafka

• Installation according to Confluent Open Source Quick Start (Local)

• Go to Kafka-bin directory:

    cd <path-to-kafka>
    # example
    cd /Users/mpa/dev/kafka/confluent-5.0.0
  

• Start Kafka

  <path-to-confluent>/bin/confluent start
  

• Create the Producer Topic:

  ./bin/kafka-topics --create --zookeeper localhost:2181 \
   --replication-factor 1 --partitions 1 --topic petstore-msg-topic
  

• To check the incoming messages do these steps:

  • Start KSQL:

    LOG_DIR=./ksql_logs ./bin/ksql
    

  • Create a Stream:

    CREATE STREAM petstorePages (route VARCHAR) \
                  WITH (KAFKA_TOPIC='petstore-msg-topic', VALUE_FORMAT='DELIMITED');
    

  • Create a Query:

    SELECT ROWKEY, route, ROWTIME FROM petstorePages LIMIT 10;`