aws-cdk.aws-events-targets 1.204.0
Event targets for Amazon EventBridge
License: Apache-2.0
Requires Python: ~=3.7

# Event Targets for Amazon EventBridge

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![End-of-Support](https://img.shields.io/badge/End--of--Support-critical.svg?style=for-the-badge)

> 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 This package is no longer being updated, and users should migrate to AWS CDK v2.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](https://docs.aws.amazon.com/cdk/v2/guide/migrating-v2.html).

---
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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:

* [Start a CodeBuild build](#start-a-codebuild-build)
* [Start a CodePipeline pipeline](#start-a-codepipeline-pipeline)
* Run an ECS task
* [Invoke a Lambda function](#invoke-a-lambda-function)
* [Invoke a API Gateway REST API](#invoke-an-api-gateway-rest-api)
* Publish a message to an SNS topic
* Send a message to an SQS queue
* [Start a StepFunctions state machine](#start-a-stepfunctions-state-machine)
* [Queue a Batch job](#queue-a-batch-job)
* Make an AWS API call
* Put a record to a Kinesis stream
* [Log an event into a LogGroup](#log-an-event-into-a-loggroup)
* Put a record to a Kinesis Data Firehose stream
* [Put an event on an EventBridge bus](#put-an-event-on-an-eventbridge-bus)
* [Send an event to EventBridge API Destination](#invoke-an-api-destination)

See the README of the `@aws-cdk/aws-events` library for more information on
EventBridge.

## Event retry policy and using dead-letter queues

The Codebuild, CodePipeline, Lambda, StepFunctions, LogGroup and SQSQueue targets support attaching a [dead letter queue and setting retry policies](https://docs.aws.amazon.com/eventbridge/latest/userguide/rule-dlq.html). See the [lambda example](#invoke-a-lambda-function).
Use [escape hatches](https://docs.aws.amazon.com/cdk/latest/guide/cfn_layer.html) for the other target types.

## Invoke a Lambda function

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](https://docs.aws.amazon.com/eventbridge/latest/userguide/rule-dlq.html).

```python
import aws_cdk.aws_lambda as lambda_


fn = lambda_.Function(self, "MyFunc",
    runtime=lambda_.Runtime.NODEJS_14_X,
    handler="index.handler",
    code=lambda_.Code.from_inline("exports.handler = handler.toString()")
)

rule = events.Rule(self, "rule",
    event_pattern=events.EventPattern(
        source=["aws.ec2"]
    )
)

queue = sqs.Queue(self, "Queue")

rule.add_target(targets.LambdaFunction(fn,
    dead_letter_queue=queue,  # Optional: add a dead letter queue
    max_event_age=cdk.Duration.hours(2),  # Optional: set the maxEventAge retry policy
    retry_attempts=2
))
```

## Log an event into a LogGroup

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.

```python
import aws_cdk.aws_logs as logs


log_group = logs.LogGroup(self, "MyLogGroup",
    log_group_name="MyLogGroup"
)

rule = events.Rule(self, "rule",
    event_pattern=events.EventPattern(
        source=["aws.ec2"]
    )
)

rule.add_target(targets.CloudWatchLogGroup(log_group))
```

## Start a CodeBuild build

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](https://docs.aws.amazon.com/eventbridge/latest/userguide/rule-dlq.html).

```python
import aws_cdk.aws_codebuild as codebuild
import aws_cdk.aws_codecommit as codecommit


repo = codecommit.Repository(self, "MyRepo",
    repository_name="aws-cdk-codebuild-events"
)

project = codebuild.Project(self, "MyProject",
    source=codebuild.Source.code_commit(repository=repo)
)

dead_letter_queue = sqs.Queue(self, "DeadLetterQueue")

# trigger a build when a commit is pushed to the repo
on_commit_rule = repo.on_commit("OnCommit",
    target=targets.CodeBuildProject(project,
        dead_letter_queue=dead_letter_queue
    ),
    branches=["master"]
)
```

## Start a CodePipeline pipeline

Use the `CodePipeline` target to trigger a CodePipeline pipeline.

The code snippet below creates a CodePipeline pipeline that is triggered every hour

```python
import aws_cdk.aws_codepipeline as codepipeline


pipeline = codepipeline.Pipeline(self, "Pipeline")

rule = events.Rule(self, "Rule",
    schedule=events.Schedule.expression("rate(1 hour)")
)

rule.add_target(targets.CodePipeline(pipeline))
```

## Start a StepFunctions state machine

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](https://docs.aws.amazon.com/eventbridge/latest/userguide/rule-dlq.html)
to the target.

```python
import aws_cdk.aws_iam as iam
import aws_cdk.aws_stepfunctions as sfn


rule = events.Rule(self, "Rule",
    schedule=events.Schedule.rate(cdk.Duration.minutes(1))
)

dlq = sqs.Queue(self, "DeadLetterQueue")

role = iam.Role(self, "Role",
    assumed_by=iam.ServicePrincipal("events.amazonaws.com")
)
state_machine = sfn.StateMachine(self, "SM",
    definition=sfn.Wait(self, "Hello", time=sfn.WaitTime.duration(cdk.Duration.seconds(10)))
)

rule.add_target(targets.SfnStateMachine(state_machine,
    input=events.RuleTargetInput.from_object({"SomeParam": "SomeValue"}),
    dead_letter_queue=dlq,
    role=role
))
```

## Queue a Batch job

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](https://docs.aws.amazon.com/eventbridge/latest/userguide/rule-dlq.html)
to the target.

```python
import aws_cdk.aws_batch as batch
from aws_cdk.aws_ecs import ContainerImage


job_queue = batch.JobQueue(self, "MyQueue",
    compute_environments=[batch.JobQueueComputeEnvironment(
        compute_environment=batch.ComputeEnvironment(self, "ComputeEnvironment",
            managed=False
        ),
        order=1
    )
    ]
)

job_definition = batch.JobDefinition(self, "MyJob",
    container=batch.JobDefinitionContainer(
        image=ContainerImage.from_registry("test-repo")
    )
)

queue = sqs.Queue(self, "Queue")

rule = events.Rule(self, "Rule",
    schedule=events.Schedule.rate(cdk.Duration.hours(1))
)

rule.add_target(targets.BatchJob(job_queue.job_queue_arn, job_queue, job_definition.job_definition_arn, job_definition,
    dead_letter_queue=queue,
    event=events.RuleTargetInput.from_object({"SomeParam": "SomeValue"}),
    retry_attempts=2,
    max_event_age=cdk.Duration.hours(2)
))
```

## Invoke an API Gateway REST API

Use the `ApiGateway` target to trigger a REST API.

The code snippet below creates a Api Gateway REST API that is invoked every hour.

```python
import aws_cdk.aws_apigateway as api
import aws_cdk.aws_lambda as lambda_


rule = events.Rule(self, "Rule",
    schedule=events.Schedule.rate(cdk.Duration.minutes(1))
)

fn = lambda_.Function(self, "MyFunc",
    handler="index.handler",
    runtime=lambda_.Runtime.NODEJS_14_X,
    code=lambda_.Code.from_inline("exports.handler = e => {}")
)

rest_api = api.LambdaRestApi(self, "MyRestAPI", handler=fn)

dlq = sqs.Queue(self, "DeadLetterQueue")

rule.add_target(
    targets.ApiGateway(rest_api,
        path="/*/test",
        method="GET",
        stage="prod",
        path_parameter_values=["path-value"],
        header_parameters={
            "Header1": "header1"
        },
        query_string_parameters={
            "QueryParam1": "query-param-1"
        },
        dead_letter_queue=dlq
    ))
```

## Invoke an API Destination

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.

```python
connection = events.Connection(self, "Connection",
    authorization=events.Authorization.api_key("x-api-key", SecretValue.secrets_manager("ApiSecretName")),
    description="Connection with API Key x-api-key"
)

destination = events.ApiDestination(self, "Destination",
    connection=connection,
    endpoint="https://example.com",
    description="Calling example.com with API key x-api-key"
)

rule = events.Rule(self, "Rule",
    schedule=events.Schedule.rate(cdk.Duration.minutes(1)),
    targets=[targets.ApiDestination(destination)]
)
```

## Put an event on an EventBridge bus

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.

```python
rule = events.Rule(self, "Rule",
    schedule=events.Schedule.expression("rate(1 minute)")
)

rule.add_target(targets.EventBus(
    events.EventBus.from_event_bus_arn(self, "External", "arn:aws:events:eu-west-1:999999999999:event-bus/test-bus")))
```