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Price simulator

Sometimes you are buying something out of Brazil or worldwide using a credit card and thought "How much does it cost?" The price simulator helps you to simulate it test

Build Status

before commit

  • run tests: lein test
  • run lint-fix: lein lint-fix

set up

credentials

You must get your own api key on free currency and then export variable by env vars:

export API_KEY=YOURAPIKEY

WIP docker-compose up

compile

$ lein uberjar

Usage

$ java -jar conversor-0.1.0-standalone.jar --currency=USB --amount=500

Examples

lein ring server-headless

lein run --currency=USD --amount=50

lein run --currency=EUR --amount=50

lein run --currency=ARS --amount=50

Deploy on AWS Lambda (WIP)

This project is serverless and ready to use on AWS Lambda to deploy and run it on Lambda, follow this steps:

Requirements

  1. Create jar
lein uberjar

  1. Create the role to run lambdas

    a) trust-policy.json

    echo '{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Principal": {
        "Service": "lambda.amazonaws.com"
      },
      "Action": "sts:AssumeRole"
    }
  ]
}' > trust-policy.json

    b) create this role with one name (our case, lambda-ex) aws iam create-role --role-name lambda-ex --assume-role-policy-document file://trust-policy.json

    c) You will see the json response and should copy the arn to use it further

    {
    "Role": {
        "AssumeRolePolicyDocument": {
            "Version": "2012-10-17",
            ...
        },
        ...
        "RoleName": "lambda-ex",
        "Path": "/",
        "Arn": "arn:aws:iam::5072812121311:role/lambda-ex"
    }
}

  2. Create your lambda (replace arn by your own)

aws lambda create-function \
  --function-name price-simulator \
  --handler conversor.core::handler \
  --runtime java11 \
  --memory 512 \
  --timeout 10 \
  --role arn:aws:iam::5072812121311:role/lambda-ex \
  --zip-file fileb://./target/uberjar/conversor-0.1.0-SNAPSHOT-standalone.jar \
  --region us-east-1
  1. Test it
aws lambda invoke \
    --function-name price-simulator \
    --payload '"300"' response.json \
    --region=us-east-1

Done!

What we use?

  • tools.cli to get args
  • clj-http to make http requests
  • cheshire to handle JSON