Nodejs/Graphql/AWS/Lambda/Serverless/React

Prerequisites

• Node > 8.0
• create-react-app
• Serverless > 1.2.0

Backend

Backend provides a Graphql API to query data. The application is written in NodeJs/Typescript and can be deployed in AWS Lambda, served with AWS API gateway. Data is stored in a json file. Serverless framework is used for deploying application to aws. Webpack is used for bundling and packaging lambda function.

Installation

• Install Serverless Framework globally.

npm install -g serverless

• Go to backend folder and run npm install
• Run serverless offline start to run application locally.
• Goto http://127.0.0.1:3002/graphiql to query and see response from the graphql server.

Sample Query

{
data(date:"20180507",currency:"LTC")
{
date
currency
buy_time
buy_price
sell_time
sell_price
profit
}
}

Sample Response

{
"data": {
"data": [
{
"date": "20180507",
"currency": "LTC",
"buy_time": "0930",
"buy_price": "14.32",
"sell_time": "1245",
"sell_price": "15.03",
"profit": "0.71"
}
]
}
}

• Run npm test to run unit tests.

Deploying to AWS

• Setup aws credentials.
• Run serverless deploy to deploy application to aws.

Frontend

Frontend is built in react with create-react-app. Uses Redux for application's state management.

Installation

• Go to frontend folder and run npm install
• Run npm start to run application locally. Requires backend application to run to fetch data.
• Run npm test to run unit tests.

Data can be filtered by date and/or currency. Data available for date 20180507 and 20180508