Lambda

A distributed Function-as-a-Service (FaaS) service.

Prerequisites

• Docker Engine (>=19.03.10)
• Docker Compose (>=1.27.0)

Installation

Build and run service:

docker-compose up -d

Usage

Create a lambda:

POST http://localhost:8000/api/v1/lambda

Request body:

{
  "name": "sum",
  "description": "Sum numbers.",
  "runtime": "java",
  "source": "<sample>"
}

Source code sample:

import java.util.List;

public class SumLambda {
  public static Number compute(List<Number> numbers) {
    System.out.println("Running sum lambda...");

    return numbers
      .stream()
      .reduce(0, (a, b) -> a.doubleValue() + b.doubleValue());
  }
}

Execute lambda:

POST http://localhost:8000/api/v1/execution

Request body:

{
  "lambda_name": "sum",
  "arguments": "[[0, 1, 2, 3, 4, 5]]"
}

Query executions:

GET http://localhost:8000/api/v1/execution?lambdaName=sum

Documentation

Check the API reference for models and routes:

http://localhost:8000/api/v1/docs

The hostname and port of the server are defined by the .env file in the project root directory.

Roadmap

New features:

• Partial updates
• Synchronous executions
• Package dependencies
• One-shot container runtimes
• Python runtime

Copyright and license

Copyright (c) 2021, Danilo Peixoto. All rights reserved.

Project developed under a BSD-3-Clause license.