badbob / phone-booking

How to run?

Start Zookeeper

$ cd kafka
$ bin/zookeeper-server-start.sh config/zookeeper.properties

Start Kafka

$ cd kafka
$ bin/kafka-server-start.sh config/server.properties

Start the application

$ cd phone_booking
$ gradle bootRun

Request examples

List devices

$ curl localhost:8080/device/list | jq .

Response

[
  {
    "id": 1,
    "version": 0,
    "availability": "AVAILABLE",
    "bookingTs": null,
    "bookedBy": null,
    "model": {
      "id": 1,
      "name": "S9",
      "manufacturer": {
        "id": 1,
        "name": "Samsung"
      }
    },
    "available": true
  },
  {
    "id": 2,
    "version": 399,
    "availability": "BOOKED",
    "bookingTs": "2023-12-12T12:35:39.791+00:00",
    "bookedBy": "alice",
    "model": {
      "id": 2,
      "name": "S8",
      "manufacturer": {
        "id": 1,
        "name": "Samsung"
      }
    },
    "available": false
  },

Book device

$ curl -u alice:alice -X PUT -s localhost:8080/device/2/book | jq .
{
  "id": 2,
  "version": 401,
  "availability": "BOOKED",
  "bookingTs": "2023-12-12T12:42:04.971+00:00",
  "bookedBy": "alice",
  "model": {
    "id": 2,
    "name": "S8",
    "manufacturer": {
      "id": 1,
      "name": "Samsung"
    }
  },
  "available": false
}

Release device

$ curl -u alice:alice -X PUT -s localhost:8080/device/2/release | jq .
{
  "id": 2,
  "version": 400,
  "availability": "AVAILABLE",
  "bookingTs": null,
  "bookedBy": null,
  "model": {
    "id": 2,
    "name": "S8",
    "manufacturer": {
      "id": 1,
      "name": "Samsung"
    }
  },
  "available": true
}

Integration test

$ ./concurrent_updates.py
Device id=2 was booked successfully
Failed to book device id=2: Device with id=2 already booked by someone else
Device id=2 was released successfully
Failed to release device id=2: Device with id=2 already booked by someone else
Device id=2 was released successfully
Device id=2 was released successfully
Device id=2 was booked successfully
Failed to book device id=2: Device with id=2 updated concurrently, retry please
Failed to release device id=2: Device with id=2 already booked by someone else
Device id=2 was released successfully
Device id=2 was booked successfully
Failed to book device id=2: Device with id=2 updated concurrently, retry please
Failed to release device id=2: Device with id=2 already booked by someone else