bajaj / hotel-search-agoda

agoda sde test

Http service for hotel search

Test for Agoda SDE.

Usage

• Language used for coding- Scala 2.11.11
• Play framework
• Build tool: Sbt
• Two api are provided
  • hotelSearch api: http://localhost:9000/hotel/search?apiKey=cool&cityName=Ashburn&sort=DESC - parameters: apiKey, cityName, sort (optional) - sort can take 2 values: ASC, DESC
  • config api: http://localhost:9001/config?key=cool&value=10 - To set request limit of apikey. set key to apiKey and value= number of request per 10 seconds - parameters: key & value [optional] - set the given key to the value - in case value is not present it returns the current value of the key

$ sbt run

Sample respone for hotelSearchApi: http://localhost:9000/hotel/search?apiKey=cool&cityName=Ashburn&sort=DESC

[
  {
    "hotelId": 22,
    "room": "Sweet Suite",
    "price": 14000
  },
  {
    "hotelId": 21,
    "room": "Deluxe",
    "price": 7000
  },
  {
    "hotelId": 20,
    "room": "Superior",
    "price": 4444
  },
  {
    "hotelId": 17,
    "room": "Deluxe",
    "price": 2800
  },
  {
    "hotelId": 25,
    "room": "Deluxe",
    "price": 1900
  },
  {
    "hotelId": 12,
    "room": "Deluxe",
    "price": 1800
 },
  {
    "hotelId": 7,
    "room": "Deluxe",
    "price": 1600
  },
  {
    "hotelId": 24,
    "room": "Superior",
    "price": 1400
  },
  {
    "hotelId": 3,
    "room": "Sweet Suite",
    "price": 1300
  },
  {
    "hotelId": 5,
    "room": "Sweet Suite",
    "price": 1200
  },
  {
    "hotelId": 10,
        "room": "Superior",
        "price": 1100
      },
      {
        "hotelId": 19,
        "room": "Superior",
        "price": 1000
  },
  {
    "hotelId": 16,
    "room": "Superior",
    "price": 800
  }
]

Incase of rate limit execeeded.

 HttpStatus Code: 429 (Too many request)
 Rate limit crossed

Assumption

• Search will be made by city name rather than id as mentioned in the test

Architecture

         
   Client Request
        |
        |
        v
+------------------------+  Check rate limit   +--------------------+        
| HotelSearch Controller |-------------------->| RateLimit Service |
+------------------------+                     +--------------------+     
        |                                               | 
        | After success rate limit                      | get config for api-key
        v                                               v
+---------------------+                       +-----------------------+
| HotelSearch Service |                       |    Config service     |  
+---------------------+                       +-----------------------+
        |
        |
        v
+-----------------------+
| HotelSearch DataLayer |
| (reads from csv)      |
+-----------------------+

     

Components & Data Structures

• Hotel Service

  • Caches the hotel data returned from the hotel data layer
  • It used Concurrent Trie map for storing the info. Key been the city name and value is the list of hotels

• RateLimit Service

  • Stores the request details with respect to apikey
  • for each api key its stores list of request. For storing this it uses concurrent trie hashmap
  • It also stores the suspended state of the apikey.

• Config service

  • Stores key value pair. It uses concurrent trie hashmap of the same.