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

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

• You should have AWS CLI don't know how to install? See how on my youtube channel

1. Create jar

lein uberjar

2. 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"
       }
   }
   

3. 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

4. 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