@aws-cdk/aws-lambda
Advanced tools
@aws-cdk/aws-lambda is an AWS Cloud Development Kit (CDK) module that allows you to define AWS Lambda functions and manage their configurations using code. It provides a high-level, object-oriented abstraction to define and deploy Lambda functions, making it easier to integrate with other AWS services and manage infrastructure as code.
Define a Lambda Function
This code defines a simple AWS Lambda function using the AWS CDK. The function uses Node.js 14.x runtime, specifies the handler, and points to the code directory.
const lambda = require('@aws-cdk/aws-lambda');
const cdk = require('@aws-cdk/core');
class MyStack extends cdk.Stack {
constructor(scope, id, props) {
super(scope, id, props);
new lambda.Function(this, 'MyFunction', {
runtime: lambda.Runtime.NODEJS_14_X,
handler: 'index.handler',
code: lambda.Code.fromAsset('lambda'),
});
}
}
const app = new cdk.App();
new MyStack(app, 'MyStack');Add Environment Variables
This code demonstrates how to add environment variables to an AWS Lambda function using the AWS CDK.
const lambda = require('@aws-cdk/aws-lambda');
const cdk = require('@aws-cdk/core');
class MyStack extends cdk.Stack {
constructor(scope, id, props) {
super(scope, id, props);
new lambda.Function(this, 'MyFunction', {
runtime: lambda.Runtime.NODEJS_14_X,
handler: 'index.handler',
code: lambda.Code.fromAsset('lambda'),
environment: {
KEY: 'value',
},
});
}
}
const app = new cdk.App();
new MyStack(app, 'MyStack');Add Permissions to Lambda Function
This code shows how to add permissions to an AWS Lambda function using the AWS CDK. In this example, the Lambda function is granted permission to get objects from an S3 bucket.
const lambda = require('@aws-cdk/aws-lambda');
const cdk = require('@aws-cdk/core');
const iam = require('@aws-cdk/aws-iam');
class MyStack extends cdk.Stack {
constructor(scope, id, props) {
super(scope, id, props);
const myFunction = new lambda.Function(this, 'MyFunction', {
runtime: lambda.Runtime.NODEJS_14_X,
handler: 'index.handler',
code: lambda.Code.fromAsset('lambda'),
});
myFunction.addToRolePolicy(new iam.PolicyStatement({
actions: ['s3:GetObject'],
resources: ['arn:aws:s3:::my-bucket/*'],
}));
}
}
const app = new cdk.App();
new MyStack(app, 'MyStack');The Serverless Framework is a popular open-source framework for building and deploying serverless applications. It supports multiple cloud providers, including AWS, and provides a rich set of features for managing serverless functions, APIs, and events. Compared to @aws-cdk/aws-lambda, Serverless Framework offers a more provider-agnostic approach and a higher-level abstraction for defining serverless applications.
The AWS SDK for JavaScript provides a set of tools for interacting with AWS services, including Lambda. While it is not specifically designed for infrastructure as code, it allows developers to programmatically manage AWS resources. Compared to @aws-cdk/aws-lambda, the AWS SDK is more low-level and requires more manual setup and configuration.
Claudia.js is a tool for deploying Node.js projects to AWS Lambda and API Gateway. It simplifies the process of setting up and managing serverless applications. Compared to @aws-cdk/aws-lambda, Claudia.js is more focused on Node.js and provides a simpler, more streamlined deployment process.
This construct library allows you to define AWS Lambda Functions.
import lambda = require('@aws-cdk/aws-lambda');
const fn = new lambda.Function(this, 'MyFunction', {
runtime: lambda.Runtime.NodeJS810,
handler: 'index.handler'
code: lambda.Code.inline('exports.handler = function(event, ctx, cb) { return cb(null, "hi"); }'),
});
The lambda.Code class includes static convenience methods for various types of
runtime code.
lambda.Code.bucket(bucket, key[, objectVersion]) - specify an S3 object that
contains the archive of your runtime code.lambda.Code.inline(code) - inline the handle code as a string. This is
limited to 4KB. The class InlineJavaScriptLambda can be used to simplify
inlining JavaScript functions.lambda.Code.directory(directory) - specify a directory in the local filesystem
which will be zipped and uploaded to S3 before deployment.lambda.Code.file(path) - specify a file to be used for Lambda code. This can
be, for example a JAR or a ZIP file, based on the runtime used.The following example shows how to define a Python function and deploy the code from the
local directory my-lambda-handler to it:
Example of Lambda Code from Local Assets
When deploying a stack that contains this code, the directory will be zip archived and then uploaded to an S3 bucket, then the exact location of the S3 objects will be passed when the stack is deployed.
This module also contains an Action that allows you to invoke a Lambda function from CodePipeline:
import codepipeline = require('@aws-cdk/aws-codepipeline');
import lambda = require('@aws-cdk/aws-lambda');
const lambdaFun = new lambda.Function(this, 'MyLambda', {
// some lambda parameters here...
});
const pipeline = new codepipeline.Pipeline(this, 'MyPipeline');
const lambdaStage = new codepipeline.Stage(this, 'Lambda', {
pipeline,
});
new lambda.PipelineInvokeAction(this, 'Lambda', {
stage: lambdaStage,
lambda: lambdaFun,
});
See the AWS documentation on how to write a Lambda function invoked from CodePipeline.
import lambda = require('@aws-cdk/aws-lambda');
const fn = new lambda.Function(this, 'MyFunction', {
runtime: lambda.Runtime.NodeJS810,
handler: 'index.handler'
code: lambda.Code.inline('exports.handler = function(event, ctx, cb) { return cb(null, "hi"); }'),
deadLetterQueueEnabled: true
});
See the AWS documentation to learn more about AWS Lambdas and DLQs.
import lambda = require('@aws-cdk/aws-lambda');
const fn = new lambda.Function(this, 'MyFunction', {
runtime: lambda.Runtime.NodeJS810,
handler: 'index.handler'
code: lambda.Code.inline('exports.handler = function(event, ctx, cb) { return cb(null, "hi"); }'),
tracing: lambda.Tracing.Active
});
See the AWS documentation to learn more about AWS Lambda's X-Ray support.
0.9.2 (2018-09-20)
NOTICE: This release includes a framework-wide breaking change which changes the type of all the string resource attributes across the framework. Instead of using strong-types that extend cdk.Token (such as QueueArn, TopicName, etc), we now represent all these attributes as normal strings, and codify the tokens into the string (using the feature introduced in #168).
Furthermore, the cdk.Arn type has been removed. In order to format/parse ARNs, use the static methods on cdk.ArnUtils.
See motivation and discussion in #695.
addPartitionKey and addSortKey methods to be consistent across the board. (#720) (e6cc189)policy argument (#730) (a79190c), closes #672FAQs
The CDK Construct Library for AWS::Lambda
The npm package @aws-cdk/aws-lambda receives a total of 96,409 weekly downloads. As such, @aws-cdk/aws-lambda popularity was classified as popular.
We found that @aws-cdk/aws-lambda demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 4 open source maintainers collaborating on the project.
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