AWS::IoTEvents::AlarmModel AlarmAction - AWS CloudFormation
SyntaxProperties

AWS::IoTEvents::AlarmModel AlarmAction

Specifies one of the following actions to receive notifications when the alarm state changes.

Syntax

To declare this entity in your AWS CloudFormation template, use the following syntax:

Properties

DynamoDB

Defines an action to write to the Amazon DynamoDB table that you created. The standard action payload contains all the information about the detector model instance and the event that triggered the action. You can customize the payload. One column of the DynamoDB table receives all attribute-value pairs in the payload that you specify.

You must use expressions for all parameters in DynamoDBAction. The expressions accept literals, operators, functions, references, and substitution templates.

Examples

  • For literal values, the expressions must contain single quotes. For example, the value for the hashKeyType parameter can be 'STRING'.

  • For references, you must specify either variables or input values. For example, the value for the hashKeyField parameter can be $input.GreenhouseInput.name.

  • For a substitution template, you must use ${}, and the template must be in single quotes. A substitution template can also contain a combination of literals, operators, functions, references, and substitution templates.

    In the following example, the value for the hashKeyValue parameter uses a substitution template.

    '${$input.GreenhouseInput.temperature * 6 / 5 + 32} in Fahrenheit'

  • For a string concatenation, you must use +. A string concatenation can also contain a combination of literals, operators, functions, references, and substitution templates.

    In the following example, the value for the tableName parameter uses a string concatenation.

    'GreenhouseTemperatureTable ' + $input.GreenhouseInput.date

For more information, see Expressions in the AWS IoT Events Developer Guide.

If the defined payload type is a string, DynamoDBAction writes non-JSON data to the DynamoDB table as binary data. The DynamoDB console displays the data as Base64-encoded text. The value for the payloadField parameter is <payload-field>_raw.

Required: No

Type: DynamoDB

Update requires: No interruption

DynamoDBv2

Defines an action to write to the Amazon DynamoDB table that you created. The default action payload contains all the information about the detector model instance and the event that triggered the action. You can customize the payload. A separate column of the DynamoDB table receives one attribute-value pair in the payload that you specify.

You must use expressions for all parameters in DynamoDBv2Action. The expressions accept literals, operators, functions, references, and substitution templates.

Examples

  • For literal values, the expressions must contain single quotes. For example, the value for the tableName parameter can be 'GreenhouseTemperatureTable'.

  • For references, you must specify either variables or input values. For example, the value for the tableName parameter can be $variable.ddbtableName.

  • For a substitution template, you must use ${}, and the template must be in single quotes. A substitution template can also contain a combination of literals, operators, functions, references, and substitution templates.

    In the following example, the value for the contentExpression parameter in Payload uses a substitution template.

    '{\"sensorID\": \"${$input.GreenhouseInput.sensor_id}\", \"temperature\": \"${$input.GreenhouseInput.temperature * 9 / 5 + 32}\"}'

  • For a string concatenation, you must use +. A string concatenation can also contain a combination of literals, operators, functions, references, and substitution templates.

    In the following example, the value for the tableName parameter uses a string concatenation.

    'GreenhouseTemperatureTable ' + $input.GreenhouseInput.date

For more information, see Expressions in the AWS IoT Events Developer Guide.

The value for the type parameter in Payload must be JSON.

Required: No

Type: DynamoDBv2

Update requires: No interruption

Firehose

Sends information about the detector model instance and the event that triggered the action to an Amazon Kinesis Data Firehose delivery stream.

Required: No

Type: Firehose

Update requires: No interruption

IotEvents

Sends an AWS IoT Events input, passing in information about the detector model instance and the event that triggered the action.

Required: No

Type: IotEvents

Update requires: No interruption

IotSiteWise

Sends information about the detector model instance and the event that triggered the action to a specified asset property in AWS IoT SiteWise.

You must use expressions for all parameters in IotSiteWiseAction. The expressions accept literals, operators, functions, references, and substitutions templates.

Examples

  • For literal values, the expressions must contain single quotes. For example, the value for the propertyAlias parameter can be '/company/windfarm/3/turbine/7/temperature'.

  • For references, you must specify either variables or input values. For example, the value for the assetId parameter can be $input.TurbineInput.assetId1.

  • For a substitution template, you must use ${}, and the template must be in single quotes. A substitution template can also contain a combination of literals, operators, functions, references, and substitution templates.

    In the following example, the value for the propertyAlias parameter uses a substitution template.

    'company/windfarm/${$input.TemperatureInput.sensorData.windfarmID}/turbine/ ${$input.TemperatureInput.sensorData.turbineID}/temperature'

You must specify either propertyAlias or both assetId and propertyId to identify the target asset property in AWS IoT SiteWise.

For more information, see Expressions in the AWS IoT Events Developer Guide.

Required: No

Type: IotSiteWise

Update requires: No interruption

IotTopicPublish

Information required to publish the MQTT message through the AWS IoT message broker.

Required: No

Type: IotTopicPublish

Update requires: No interruption

Lambda

Calls a Lambda function, passing in information about the detector model instance and the event that triggered the action.

Required: No

Type: Lambda

Update requires: No interruption

Sns

Information required to publish the Amazon SNS message.

Required: No

Type: Sns

Update requires: No interruption

Sqs

Sends information about the detector model instance and the event that triggered the action to an Amazon SQS queue.

Required: No

Type: Sqs

Update requires: No interruption