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leanser

v0.0.2

Published

AWS Lambda Cleaner - Cleanup resources on AWS Lambda container shutdown (timeout and/or spin-down)

Downloads

1

Readme

leanser

build Status npm version license

AWS Lambda Cleaner - Cleanup resources on AWS Lambda container shutdown (timeout and/or spin-down).

:warning: You have 500 milliseconds to complete all of your callbacks before function shutdown.

Installation

You can add leanser package into your AWS Lambda function either by NPM package or by AWS Lambda layer as shown below:

By NPM package

To install the middleware, you can use NPM:

npm install --save leanser

By AWS Lambda Layer

You can also add leanser as layer into your AWS Lambda function.

arn:aws:lambda:${region}:273094347961:layer:leanser:${layer-version}

Latest layer version: leanser (badge powered by Globadge serverless)

Note: In the ARN above, you need to replace ${region} with the actual AWS region you deployed your AWS Lambda function.

Usage

const { register } = require('leanser');

async function myCleaner() {
    // Run your custom cleanup logic (close connections, etc ...)  
};

async function myAnotherCleaner() {
    // Run your another custom cleanup logic (close connections, etc ...)  
};

register(myCleaner, myAnotherCleaner);

exports.handler = async function(event, context) {
    // Do something meaningful

    return {
        statusCode: 200,
    }
};

Configuration

  • Optionally, you can disable/enable cleaner.

    • By environment variable: Set LEANSER_ENABLE environment variable to false to disable cleaner or to true (which is default) to enable cleaner back.
    LEANSER_ENABLE=false

Contributing

Everyone is very welcome to contribute to this repository. Feel free to raise issues or to submit Pull Requests.

License

Licensed under MIT License.