Module aws.lambda
ballerinax/aws.lambda Ballerina library
3.2.0
Module Overview
This module provides the capabilities of creating AWS Lambda functions using Ballerina.
Annotation Usage Sample:
import ballerinax/aws.lambda; import ballerina/uuid; import ballerina/io; // The `@lambda:Function` annotation marks a function to // generate an AWS Lambda function @lambda:Function public function echo(lambda:Context ctx, json input) returns json { return input; } @lambda:Function public function uuid(lambda:Context ctx, json input) returns json { return uuid:createType1AsString(); } // The `lambda:Context` object contains request execution // context information @lambda:Function public function ctxinfo(lambda:Context ctx, json input) returns json|error { json result = { RequestID: ctx.getRequestId(), DeadlineMS: ctx.getDeadlineMs(), InvokedFunctionArn: ctx.getInvokedFunctionArn(), TraceID: ctx.getTraceId(), RemainingExecTime: ctx.getRemainingExecutionTime() }; return result; } @lambda:Function public function notifySQS(lambda:Context ctx, lambda:SQSEvent event) returns json { return event.Records[0].body; } @lambda:Function public function notifyS3(lambda:Context ctx, lambda:S3Event event) returns json { return event.Records[0].s3.'object.key; } @lambda:Function public function notifyDynamoDB(lambda:Context ctx, lambda:DynamoDBEvent event) returns json { return event.Records[0].dynamodb.Keys.toString(); } @lambda:Function public function notifySES(lambda:Context ctx, lambda:SESEvent event) returns json { return event.Records[0].ses.mail.commonHeaders.subject; } @lambda:Function public function apigwRequest(lambda:Context ctx, lambda:APIGatewayProxyRequest request) { io:println("Path: ", request.path); }
The output of the bal build is as follows:
$ bal build functions.bal Compiling source functions.bal Generating executable functions.jar @aws.lambda:Function: echo, uuid, ctxinfo, notifySQS, notifyS3 Run the following command to deploy each Ballerina AWS Lambda function: aws lambda create-function --function-name $FUNCTION_NAME --zip-file fileb://aws-ballerina-lambda-functions.zip --handler functions.$FUNCTION_NAME --runtime provided --role $LAMBDA_ROLE_ARN --layers arn:aws:lambda:$REGION_ID:134633749276:layer:ballerina-jre17:1 --memory-size 512 --timeout 10 Run the following command to re-deploy an updated Ballerina AWS Lambda function: aws lambda update-function-code --function-name $FUNCTION_NAME --zip-file fileb://aws-ballerina-lambda-functions.zip