X-Men - Find a Mutant

AWS API GateWay(Proxy) + AWS Lambda Runtime + DynamoDB + Java11 + Micronaut - Proxy

This is an exercise proposed to compute a DNA that verifies if is a human or a mutant based on these characteristics:

• It's a mutant if find 2 or more series of 4 characteres based on letters 'A','C'.'T','G' in horizontal, vertical and oblique otherwise is a human

Not Mutant:

-	-	-	-	-	-
A	T	G	C	G	A
C	A	G	T	G	C
T	T	A	T	T	T
A	G	A	C	G	G
G	C	G	T	C	A
T	C	A	C	T	G
-	-	-	-	-	-

Mutant:

-	-	-	-	-	-
A	T	G	C	G	A
C	A	G	T	G	C
T	T	A	T	G	T
A	G	A	A	G	G
C	C	C	C	T	A
T	C	A	C	T	G
-	-	-	-	-	-

Dependencies:

• To run this Lambda Locally you have to install SAM and can use the file sam-local.sh
• Docker
• AWS Account with privileges IAM, Lambda, DynamoDB, API Gateway

Create a table with billing-mode PAY_PER_REQUEST because we don't know the income traffic to the lambda

$ aws dynamodb create-table --table-name stats --attribute-definitions AttributeName=id,AttributeType=S --key-schema AttributeName=id,KeyType=HASH --billing-mode PAY_PER_REQUEST

The Dockerfile contains the build to build the image it can be built with:

#!/bin/sh
./gradlew clean build
docker build . -t mutant
sam local start-api -t sam.yaml -p 3000

The following Endpoints exposed:

• Host: http://localhost:3000
• URI: /mutant
  • Method: POST
  • Body Format: application/json
  • Body Request Mutant:

    { 
        "dna":["ATGCGA","CAGTGC","TTATGT","AGAAGG","CCCCTA","TCACTG"] 
    }

  • Body Human:

    { 
        "dna":["ATGCGA","CAGTGC","TTATTT","AGACGG","GCGTCA","TCACTG"] 
    }

• URI: /stats
  • Method: GET
  • Body Response Format: application/json

    {
      "count_human_dna": 31,
      "count_mutant_dna": 10,
      "ratio": 0.3226
    }

To test your local application use:

curl -i -H "Accept: application/json" -H "Content-Type: application/json" -X GET http://localhost:3000/stats

Response:

date: Fri, 26 Jun 2020 02:15:29 GMT
content-type: application/json
content-length: 59
x-amzn-requestid: 5d6ff20b-8946-4272-a9a2-10724453784b
x-amz-apigw-id: OtsKOFRBIAMFbsA=
x-amzn-trace-id: Root=1-5ef55a41-9546ca252491771d22425560;Sampled=0

{"count_human_dna":32,"count_mutant_dna":11,"ratio":0.3438}%

Steps to Deploy your .jar file:

1. Create a Rol and grant access to:
   • Lambda(Execution Policie)
   • DynamoDB(Read and Put Policies)
2. Create a Lambda Function with Java11:
   • Handler: mutant.StreamLambdaHandler::handleRequest
   • Memory: 512MB
   • Timeout: 15s
3. Create a Proxy ApiRest in API GateWay:
   • Create a Resource and configure like proxy
   • Fill the Lambda text area with the name of your created Lambda
   • Test your Lambda:
     • Method: GET
     • {proxy}: /stats
     • Press Test

        {
           "count_human_dna": 31,
           "count_mutant_dna": 10,
           "ratio": 0.3226
        }

To verify my Lambda, you can go to:

• https://sym0zsedw2.execute-api.us-east-1.amazonaws.com/Prod/mutant
• https://sym0zsedw2.execute-api.us-east-1.amazonaws.com/Prod/stats