Pre-release

This release is a pre-release and may not be stable for production use.

Actions for AWS IoT Rule

---

cdk-constructs: Experimental

The APIs of higher level constructs in this module are experimental and under active development. They are subject to non-backward compatible changes or removal in any future version. These are not subject to the Semantic Versioning model and breaking changes will be announced in the release notes. This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.

This library contains integration classes to send data to any number of supported AWS Services. Instances of these classes should be passed to TopicRule defined in aws-cdk-lib/aws-iot.

Currently supported are:

Republish a message to another MQTT topic
Invoke a Lambda function
Put objects to a S3 bucket
Put logs to CloudWatch Logs
Capture CloudWatch metrics
Change state for a CloudWatch alarm
Put records to Kinesis Data stream
Put records to Amazon Data Firehose stream
Send messages to SQS queues
Publish messages on SNS topics
Write messages into columns of DynamoDB
Put messages IoT Events input
Send messages to HTTPS endpoints

Republish a message to another MQTT topic

The code snippet below creates an AWS IoT Rule that republish a message to another MQTT topic when it is triggered.

iot.TopicRule(self, "TopicRule",
    sql=iot.IotSql.from_string_as_ver20160323("SELECT topic(2) as device_id, timestamp() as timestamp, temperature FROM 'device/+/data'"),
    actions=[
        actions.IotRepublishMqttAction("${topic()}/republish",
            quality_of_service=actions.MqttQualityOfService.AT_LEAST_ONCE
        )
    ]
)

Invoke a Lambda function

The code snippet below creates an AWS IoT Rule that invoke a Lambda function when it is triggered.

func = lambda_.Function(self, "MyFunction",
    runtime=lambda_.Runtime.NODEJS_LATEST,
    handler="index.handler",
    code=lambda_.Code.from_inline("""
            exports.handler = (event) => {
              console.log("It is test for lambda action of AWS IoT Rule.", event);
            };""")
)

iot.TopicRule(self, "TopicRule",
    sql=iot.IotSql.from_string_as_ver20160323("SELECT topic(2) as device_id, timestamp() as timestamp, temperature FROM 'device/+/data'"),
    actions=[actions.LambdaFunctionAction(func)]
)

Put objects to a S3 bucket

The code snippet below creates an AWS IoT Rule that puts objects to a S3 bucket when it is triggered.

bucket = s3.Bucket(self, "MyBucket")

iot.TopicRule(self, "TopicRule",
    sql=iot.IotSql.from_string_as_ver20160323("SELECT topic(2) as device_id FROM 'device/+/data'"),
    actions=[actions.S3PutObjectAction(bucket)]
)

The property key of S3PutObjectAction is given the value ${topic()}/${timestamp()} by default. This ${topic()} and ${timestamp()} is called Substitution templates. For more information see this documentation. In above sample, ${topic()} is replaced by a given MQTT topic as device/001/data. And ${timestamp()} is replaced by the number of the current timestamp in milliseconds as 1636289461203. So if the MQTT broker receives an MQTT topic device/001/data on 2021-11-07T00:00:00.000Z, the S3 bucket object will be put to device/001/data/1636243200000.

You can also set specific key as following:

bucket = s3.Bucket(self, "MyBucket")

iot.TopicRule(self, "TopicRule",
    sql=iot.IotSql.from_string_as_ver20160323("SELECT topic(2) as device_id, year, month, day FROM 'device/+/data'"),
    actions=[
        actions.S3PutObjectAction(bucket,
            key="${year}/${month}/${day}/${topic(2)}"
        )
    ]
)

If you wanna set access control to the S3 bucket object, you can specify accessControl as following:

bucket = s3.Bucket(self, "MyBucket")

iot.TopicRule(self, "TopicRule",
    sql=iot.IotSql.from_string_as_ver20160323("SELECT * FROM 'device/+/data'"),
    actions=[
        actions.S3PutObjectAction(bucket,
            access_control=s3.BucketAccessControl.PUBLIC_READ
        )
    ]
)

Put logs to CloudWatch Logs

The code snippet below creates an AWS IoT Rule that puts logs to CloudWatch Logs when it is triggered.

import aws_cdk.aws_logs as logs


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

iot.TopicRule(self, "TopicRule",
    sql=iot.IotSql.from_string_as_ver20160323("SELECT topic(2) as device_id FROM 'device/+/data'"),
    actions=[actions.CloudWatchLogsAction(log_group)]
)

Capture CloudWatch metrics

The code snippet below creates an AWS IoT Rule that capture CloudWatch metrics when it is triggered.

topic_rule = iot.TopicRule(self, "TopicRule",
    sql=iot.IotSql.from_string_as_ver20160323("SELECT topic(2) as device_id, namespace, unit, value, timestamp FROM 'device/+/data'"),
    actions=[
        actions.CloudWatchPutMetricAction(
            metric_name="${topic(2)}",
            metric_namespace="${namespace}",
            metric_unit="${unit}",
            metric_value="${value}",
            metric_timestamp="${timestamp}"
        )
    ]
)

Start Step Functions State Machine

The code snippet below creates an AWS IoT Rule that starts a Step Functions State Machine when it is triggered.

state_machine = stepfunctions.StateMachine(self, "SM",
    definition_body=stepfunctions.DefinitionBody.from_chainable(stepfunctions.Wait(self, "Hello", time=stepfunctions.WaitTime.duration(Duration.seconds(10))))
)

iot.TopicRule(self, "TopicRule",
    sql=iot.IotSql.from_string_as_ver20160323("SELECT * FROM 'device/+/data'"),
    actions=[
        actions.StepFunctionsStateMachineAction(state_machine)
    ]
)

Change the state of an Amazon CloudWatch alarm

The code snippet below creates an AWS IoT Rule that changes the state of an Amazon CloudWatch alarm when it is triggered:

import aws_cdk.aws_cloudwatch as cloudwatch


metric = cloudwatch.Metric(
    namespace="MyNamespace",
    metric_name="MyMetric",
    dimensions_map={"MyDimension": "MyDimensionValue"}
)
alarm = cloudwatch.Alarm(self, "MyAlarm",
    metric=metric,
    threshold=100,
    evaluation_periods=3,
    datapoints_to_alarm=2
)

topic_rule = iot.TopicRule(self, "TopicRule",
    sql=iot.IotSql.from_string_as_ver20160323("SELECT topic(2) as device_id FROM 'device/+/data'"),
    actions=[
        actions.CloudWatchSetAlarmStateAction(alarm,
            reason="AWS Iot Rule action is triggered",
            alarm_state_to_set=cloudwatch.AlarmState.ALARM
        )
    ]
)

Put records to Kinesis Data stream

The code snippet below creates an AWS IoT Rule that puts records to Kinesis Data stream when it is triggered.

import aws_cdk.aws_kinesis as kinesis


stream = kinesis.Stream(self, "MyStream")

topic_rule = iot.TopicRule(self, "TopicRule",
    sql=iot.IotSql.from_string_as_ver20160323("SELECT * FROM 'device/+/data'"),
    actions=[
        actions.KinesisPutRecordAction(stream,
            partition_key="${newuuid()}"
        )
    ]
)

Put records to Amazon Data Firehose stream

The code snippet below creates an AWS IoT Rule that puts records to Put records to Amazon Data Firehose stream when it is triggered.

import aws_cdk.aws_kinesisfirehose as firehose


bucket = s3.Bucket(self, "MyBucket")
stream = firehose.DeliveryStream(self, "MyStream",
    destination=firehose.S3Bucket(bucket)
)

topic_rule = iot.TopicRule(self, "TopicRule",
    sql=iot.IotSql.from_string_as_ver20160323("SELECT * FROM 'device/+/data'"),
    actions=[
        actions.FirehosePutRecordAction(stream,
            batch_mode=True,
            record_separator=actions.FirehoseRecordSeparator.NEWLINE
        )
    ]
)

Send messages to an SQS queue

The code snippet below creates an AWS IoT Rule that send messages to an SQS queue when it is triggered:

import aws_cdk.aws_sqs as sqs


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

topic_rule = iot.TopicRule(self, "TopicRule",
    sql=iot.IotSql.from_string_as_ver20160323("SELECT topic(2) as device_id, year, month, day FROM 'device/+/data'"),
    actions=[
        actions.SqsQueueAction(queue,
            use_base64=True
        )
    ]
)

The code snippet below creates and AWS IoT Rule that publishes messages to an SNS topic when it is triggered:

import aws_cdk.aws_sns as sns


topic = sns.Topic(self, "MyTopic")

topic_rule = iot.TopicRule(self, "TopicRule",
    sql=iot.IotSql.from_string_as_ver20160323("SELECT topic(2) as device_id, year, month, day FROM 'device/+/data'"),
    actions=[
        actions.SnsTopicAction(topic,
            message_format=actions.SnsActionMessageFormat.JSON
        )
    ]
)

Write attributes of a message to DynamoDB

The code snippet below creates an AWS IoT rule that writes all or part of an MQTT message to DynamoDB using the DynamoDBv2 action.

import aws_cdk.aws_dynamodb as dynamodb

# table: dynamodb.Table


topic_rule = iot.TopicRule(self, "TopicRule",
    sql=iot.IotSql.from_string_as_ver20160323("SELECT * FROM 'device/+/data'"),
    actions=[
        actions.DynamoDBv2PutItemAction(table)
    ]
)

Put messages IoT Events input

The code snippet below creates an AWS IoT Rule that puts messages to an IoT Events input when it is triggered:

import aws_cdk.aws_iotevents_alpha as iotevents
import aws_cdk.aws_iam as iam

# role: iam.IRole


input = iotevents.Input(self, "MyInput",
    attribute_json_paths=["payload.temperature", "payload.transactionId"]
)
topic_rule = iot.TopicRule(self, "TopicRule",
    sql=iot.IotSql.from_string_as_ver20160323("SELECT * FROM 'device/+/data'"),
    actions=[
        actions.IotEventsPutMessageAction(input,
            batch_mode=True,  # optional property, default is 'false'
            message_id="${payload.transactionId}",  # optional property, default is a new UUID
            role=role
        )
    ]
)

Send Messages to HTTPS Endpoints

The code snippet below creates an AWS IoT Rule that sends messages to an HTTPS endpoint when it is triggered:

topic_rule = iot.TopicRule(self, "TopicRule",
    sql=iot.IotSql.from_string_as_ver20160323("SELECT topic(2) as device_id, year, month, day FROM 'device/+/data'")
)

topic_rule.add_action(
    actions.HttpsAction("https://example.com/endpoint",
        confirmation_url="https://example.com",
        headers=[actions.HttpActionHeader(key="key0", value="value0"), actions.HttpActionHeader(key="key1", value="value1")
        ],
        auth=actions.HttpActionSigV4Auth(service_name="serviceName", signing_region="us-east-1")
    ))

You can enable batching to reduce costs and improve efficiency:

from aws_cdk import Size

# topic_rule: iot.TopicRule


topic_rule.add_action(
    actions.HttpsAction("https://example.com/endpoint",
        batch_config=actions.HttpActionBatchConfig(
            max_batch_open_duration=Duration.millis(100),
            max_batch_size=5,
            max_batch_size_bytes=Size.kibibytes(1)
        )
    ))

For more information about the batching configuration, see the AWS IoT Core documentation.

Write Data to Open Search Service

The code snippet below creates an AWS IoT Rule that writes data to an Open Search Service when it is triggered:

import aws_cdk.aws_opensearchservice as opensearch
# domain: opensearch.Domain


topic_rule = iot.TopicRule(self, "TopicRule",
    sql=iot.IotSql.from_string_as_ver20160323("SELECT topic(2) as device_id, year, month, day FROM 'device/+/data'")
)

topic_rule.add_action(actions.OpenSearchAction(domain,
    id="my-id",
    index="my-index",
    type="my-type"
))

Release files for aws-cdk.aws-iot-actions-alpha 2.270.0a0

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