Environment:

• Java version: 1.8
• Maven version: 3.*
• Spring Boot version: 2.2.1.RELEASE

Read-Only Files:

• src/test/*

Data:

Example of a trade data JSON object:

{
    "id":1,
    "type": "buy",
    "userId": 23,
    "symbol": "ABX",
    "shares": 30,
    "price": 134,
    "timestamp": 1531522701000
}

Requirements:

The task is to implement a model for the trade object and the REST service that exposes the /trades endpoint, which allows for managing the collection of trade records in the following way:

POST request to /trades:

• creates a new trade
• expects a JSON trade object without an id property as a body payload. If the shares value is out of accepted range [1, 100], or the type value is invalid (i.e. not 'buy' or 'sell'), the API must return error code 400. Besides those cases, you can assume that the given payload is always valid.
• adds the given trade object to the collection of trades and assigns a unique integer id to it. The first created trade must have id 1, the second one 2, and so on.
• the response code is 201, and the response body is the created trade object

GET request to /trades:

• return a collection of all trades
• the response code is 200, and the response body is an array of all trades objects ordered by their ids in increasing order
• optionally accepts query parameters type and userId, for example /trades/?type=buy&&userId=122. All these parameters are optional. In case they are present, only objects matching the parameters must be returned.

GET request to /trades/<id>:

• returns a trade with the given id
• if the matching trade exists, the response code is 200 and the response body is the matching trade object
• if there is no trade with the given id in the collection, the response code is 404

DELETE, PUT, PATCH request to /trades/<id>:

• the response code is 405 because the API does not allow deleting or modifying trades for any id value

Commands

• run:

mvn clean package; java -jar target/stocktrades-1.0.jar

• install:

mvn clean install

• test:

mvn clean test