Quotes Service

• Java 8
• Lombok
• Spring Boot 2.4.2
• Spring Websockets
• Java-WebSocket
• Maven
• Redis

Quotes Service Overview

Quotes Service aggregates data about instruments from Partner's Service via websockets and stores the data in Redis for the subsequent usage. It provides http endpoints to get all available instruments with price history. Along with the http endpoints the service provides a websocket where hot-price events will be published as long as price of an instrument is changed more than 10% in price relative to the price 5 minutes ago.

API Usage

The service provides two http endpoints and one websocket:

• GET /api/v1/instruments to fetch all available instruments along with the latest close prices

  Example response:

      {
          "PW6443U52503": 973.7215,
          "XM7418834125": 547.7451,
          "KF8868007858": 0,
          "PY0746412224": 1353.27,
          "MW63338T2530": 1292.8806,
          "WX5706242812": 284.8261,
          "KK23023DK121": 1390.8261,
          "BK30J7405250": 841.6667,
          "TY4525767181": 291.7097
      }
  

• GET /api/v1/instruments/PW6443U52503 to fetch instruments history for the last 30 minutes

  Example response:

      [
          {
              "openTimeStamp": "2021-02-14T11:55:00",
              "closeTimeStamp": "2021-02-14T11:56:00",
              "openPrice": 952.538,
              "closePrice": 973.7215,
              "lowPrice": 948.9937,
              "highPrice": 973.7215
          },
          {
              "openTimeStamp": "2021-02-14T11:54:00",
              "closeTimeStamp": "2021-02-14T11:55:00",
              "openPrice": 952.538,
              "closePrice": 973.7215,
              "lowPrice": 948.9937,
              "highPrice": 973.7215
          },
          {
              "openTimeStamp": "2021-02-14T11:53:00",
              "closeTimeStamp": "2021-02-14T11:54:00",
              "openPrice": 952.538,
              "closePrice": 973.7215,
              "lowPrice": 948.9937,
              "highPrice": 973.7215
          },
          {
              "openTimeStamp": "2021-02-14T11:52:00",
              "closeTimeStamp": "2021-02-14T11:53:00",
              "openPrice": 952.538,
              "closePrice": 973.7215,
              "lowPrice": 948.9937,
              "highPrice": 973.7215
          }
      ]
  

• Websocket(SockJS) is available on port 8081. The service provides one topic /topic/hot-price.

  Message content example:

  {"isin":"RD567G2041M8","trend":"UP","change":45.5,"isHot":true}  
  

  Example of consuming the socket To test websocket open a browser and go to localhost:8081. Open dev tools and press Connect button. Once hot-price is published a message will appear in console.

Run tests locally

mvn clean test

Build service and run locally

docker-compose up --build Will build docker image and run it along with redis and Partner's service image. Rest API will be available on 8081. Websocket will be available on the same port.