README

Description

A simple PHP wrapper library around AWS lambda's runtime API. To be used inside a custom PHP 8 runtime.

Usage

Lambda Runtime

Composer install the library into your lambdas runtime layer or another layer dedicated to composer files.

composer require intermaterium/kickstart

Then create a /opt/bootstrap file in your lambdas runtime layer invoking the library.

use Intermaterium\Kickstart\Locator\FileHandlerLocator;
use Intermaterium\Kickstart\Response\ErrorResponseBuilder;
use Intermaterium\Kickstart\RuntimeFactory;

require_once('/opt/vendor/autoload.php');

// Create our runtime from the provided environment
$errorResponseBuilder = new ErrorResponseBuilder();
$runtimeFactory = new RuntimeFactory($errorResponseBuilder);
$runtime = $runtimeFactory->create(getenv('AWS_LAMBDA_RUNTIME_API'));

try {
    // Retrieve the function being invoked by lambda
    $fileHandlerLocator = new FileHandlerLocator(getenv('LAMBDA_TASK_ROOT'));
    $lambdaHandler = $fileHandlerLocator->get(getenv('_HANDLER'));
} catch (\Exception $e) {
    // If we failed to get the handler send an initialisation error and kill the lambda
    $runtime->initialisationFailure('Failed to get lambda handler', $e);
    exit(1);
}

do {
    // Infinitely loop handling events from lambda until lambda kills the runtime
    $runtime->invoke($lambdaHandler);
} while(true);

Lambda functions

Kickstart supports aws lambdas in the form of either php functions like:

use Intermaterium\Kickstart\Context\Context;

return function($event, Context $context): mixed {
    return 'Hello ' . ($event['queryStringParameters']['name'] ?? 'world');
};

Or callable classes:

use Intermaterium\Kickstart\Context\Context;

class Handler
{
    public function __invoke($event, Context $context): mixed
    {
        return 'Hello ' . ($event['queryStringParameters']['name'] ?? 'world');
    }
}

return new Handler();