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@aws-cdk/aws-events-targets
Advanced tools
AWS CDK v1 has reached End-of-Support on 2023-06-01. This package is no longer being updated, and users should migrate to AWS CDK v2.
For more information on how to migrate, see the Migrating to AWS CDK v2 guide.
This library contains integration classes to send Amazon EventBridge to any
number of supported AWS Services. Instances of these classes should be passed
to the rule.addTarget()
method.
Currently supported are:
See the README of the @aws-cdk/aws-events
library for more information on
EventBridge.
The Codebuild, CodePipeline, Lambda, StepFunctions, LogGroup and SQSQueue targets support attaching a dead letter queue and setting retry policies. See the lambda example. Use escape hatches for the other target types.
Use the LambdaFunction
target to invoke a lambda function.
The code snippet below creates an event rule with a Lambda function as a target
triggered for every events from aws.ec2
source. You can optionally attach a
dead letter queue.
import * as lambda from '@aws-cdk/aws-lambda';
const fn = new lambda.Function(this, 'MyFunc', {
runtime: lambda.Runtime.NODEJS_14_X,
handler: 'index.handler',
code: lambda.Code.fromInline(`exports.handler = handler.toString()`),
});
const rule = new events.Rule(this, 'rule', {
eventPattern: {
source: ["aws.ec2"],
},
});
const queue = new sqs.Queue(this, 'Queue');
rule.addTarget(new targets.LambdaFunction(fn, {
deadLetterQueue: queue, // Optional: add a dead letter queue
maxEventAge: cdk.Duration.hours(2), // Optional: set the maxEventAge retry policy
retryAttempts: 2, // Optional: set the max number of retry attempts
}));
Use the LogGroup
target to log your events in a CloudWatch LogGroup.
For example, the following code snippet creates an event rule with a CloudWatch LogGroup as a target.
Every events sent from the aws.ec2
source will be sent to the CloudWatch LogGroup.
import * as logs from '@aws-cdk/aws-logs';
const logGroup = new logs.LogGroup(this, 'MyLogGroup', {
logGroupName: 'MyLogGroup',
});
const rule = new events.Rule(this, 'rule', {
eventPattern: {
source: ["aws.ec2"],
},
});
rule.addTarget(new targets.CloudWatchLogGroup(logGroup));
Use the CodeBuildProject
target to trigger a CodeBuild project.
The code snippet below creates a CodeCommit repository that triggers a CodeBuild project on commit to the master branch. You can optionally attach a dead letter queue.
import * as codebuild from '@aws-cdk/aws-codebuild';
import * as codecommit from '@aws-cdk/aws-codecommit';
const repo = new codecommit.Repository(this, 'MyRepo', {
repositoryName: 'aws-cdk-codebuild-events',
});
const project = new codebuild.Project(this, 'MyProject', {
source: codebuild.Source.codeCommit({ repository: repo }),
});
const deadLetterQueue = new sqs.Queue(this, 'DeadLetterQueue');
// trigger a build when a commit is pushed to the repo
const onCommitRule = repo.onCommit('OnCommit', {
target: new targets.CodeBuildProject(project, {
deadLetterQueue: deadLetterQueue,
}),
branches: ['master'],
});
Use the CodePipeline
target to trigger a CodePipeline pipeline.
The code snippet below creates a CodePipeline pipeline that is triggered every hour
import * as codepipeline from '@aws-cdk/aws-codepipeline';
const pipeline = new codepipeline.Pipeline(this, 'Pipeline');
const rule = new events.Rule(this, 'Rule', {
schedule: events.Schedule.expression('rate(1 hour)'),
});
rule.addTarget(new targets.CodePipeline(pipeline));
Use the SfnStateMachine
target to trigger a State Machine.
The code snippet below creates a Simple StateMachine that is triggered every minute with a dummy object as input. You can optionally attach a dead letter queue to the target.
import * as iam from '@aws-cdk/aws-iam';
import * as sfn from '@aws-cdk/aws-stepfunctions';
const rule = new events.Rule(this, 'Rule', {
schedule: events.Schedule.rate(cdk.Duration.minutes(1)),
});
const dlq = new sqs.Queue(this, 'DeadLetterQueue');
const role = new iam.Role(this, 'Role', {
assumedBy: new iam.ServicePrincipal('events.amazonaws.com'),
});
const stateMachine = new sfn.StateMachine(this, 'SM', {
definition: new sfn.Wait(this, 'Hello', { time: sfn.WaitTime.duration(cdk.Duration.seconds(10)) })
});
rule.addTarget(new targets.SfnStateMachine(stateMachine, {
input: events.RuleTargetInput.fromObject({ SomeParam: 'SomeValue' }),
deadLetterQueue: dlq,
role: role
}));
Use the BatchJob
target to queue a Batch job.
The code snippet below creates a Simple JobQueue that is triggered every hour with a dummy object as input. You can optionally attach a dead letter queue to the target.
import * as batch from '@aws-cdk/aws-batch';
import { ContainerImage } from '@aws-cdk/aws-ecs';
const jobQueue = new batch.JobQueue(this, 'MyQueue', {
computeEnvironments: [
{
computeEnvironment: new batch.ComputeEnvironment(this, 'ComputeEnvironment', {
managed: false,
}),
order: 1,
},
],
});
const jobDefinition = new batch.JobDefinition(this, 'MyJob', {
container: {
image: ContainerImage.fromRegistry('test-repo'),
},
});
const queue = new sqs.Queue(this, 'Queue');
const rule = new events.Rule(this, 'Rule', {
schedule: events.Schedule.rate(cdk.Duration.hours(1)),
});
rule.addTarget(new targets.BatchJob(
jobQueue.jobQueueArn,
jobQueue,
jobDefinition.jobDefinitionArn,
jobDefinition, {
deadLetterQueue: queue,
event: events.RuleTargetInput.fromObject({ SomeParam: 'SomeValue' }),
retryAttempts: 2,
maxEventAge: cdk.Duration.hours(2),
},
));
Use the ApiGateway
target to trigger a REST API.
The code snippet below creates a Api Gateway REST API that is invoked every hour.
import * as api from '@aws-cdk/aws-apigateway';
import * as lambda from '@aws-cdk/aws-lambda';
const rule = new events.Rule(this, 'Rule', {
schedule: events.Schedule.rate(cdk.Duration.minutes(1)),
});
const fn = new lambda.Function( this, 'MyFunc', {
handler: 'index.handler',
runtime: lambda.Runtime.NODEJS_14_X,
code: lambda.Code.fromInline( 'exports.handler = e => {}' ),
} );
const restApi = new api.LambdaRestApi( this, 'MyRestAPI', { handler: fn } );
const dlq = new sqs.Queue(this, 'DeadLetterQueue');
rule.addTarget(
new targets.ApiGateway( restApi, {
path: '/*/test',
method: 'GET',
stage: 'prod',
pathParameterValues: ['path-value'],
headerParameters: {
Header1: 'header1',
},
queryStringParameters: {
QueryParam1: 'query-param-1',
},
deadLetterQueue: dlq
} ),
)
Use the targets.ApiDestination
target to trigger an external API. You need to
create an events.Connection
and events.ApiDestination
as well.
The code snippet below creates an external destination that is invoked every hour.
const connection = new events.Connection(this, 'Connection', {
authorization: events.Authorization.apiKey('x-api-key', SecretValue.secretsManager('ApiSecretName')),
description: 'Connection with API Key x-api-key',
});
const destination = new events.ApiDestination(this, 'Destination', {
connection,
endpoint: 'https://example.com',
description: 'Calling example.com with API key x-api-key',
});
const rule = new events.Rule(this, 'Rule', {
schedule: events.Schedule.rate(cdk.Duration.minutes(1)),
targets: [new targets.ApiDestination(destination)],
});
Use the EventBus
target to route event to a different EventBus.
The code snippet below creates the scheduled event rule that route events to an imported event bus.
const rule = new events.Rule(this, 'Rule', {
schedule: events.Schedule.expression('rate(1 minute)'),
});
rule.addTarget(new targets.EventBus(
events.EventBus.fromEventBusArn(
this,
'External',
`arn:aws:events:eu-west-1:999999999999:event-bus/test-bus`,
),
));
FAQs
Event targets for Amazon EventBridge
The npm package @aws-cdk/aws-events-targets receives a total of 31,414 weekly downloads. As such, @aws-cdk/aws-events-targets popularity was classified as popular.
We found that @aws-cdk/aws-events-targets 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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