Class: Aws::IoTEvents::Types::DynamoDBv2Action
- Inherits:
-
Struct
- Object
- Struct
- Aws::IoTEvents::Types::DynamoDBv2Action
- Defined in:
- gems/aws-sdk-iotevents/lib/aws-sdk-iotevents/types.rb
Overview
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
${}
, and the template must be in single quotes. A substitution template can also contain a combination of literals, operators, functions, references, and substitution templates.In the following example, the value for the
contentExpression
parameter inPayload
uses a substitution template.'{"sensorID": "${$input.GreenhouseInput.sensor_id}", "temperature": "${$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
.
Constant Summary collapse
- SENSITIVE =
[]
Instance Attribute Summary collapse
-
#payload ⇒ Types::Payload
Information needed to configure the payload.
-
#table_name ⇒ String
The name of the DynamoDB table.
Instance Attribute Details
#payload ⇒ Types::Payload
Information needed to configure the payload.
By default, AWS IoT Events generates a standard payload in JSON for
any action. This action payload contains all attribute-value pairs
that have the information about the detector model instance and the
event triggered the action. To configure the action payload, you can
use contentExpression
.
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# File 'gems/aws-sdk-iotevents/lib/aws-sdk-iotevents/types.rb', line 1661 class DynamoDBv2Action < Struct.new( :table_name, :payload) SENSITIVE = [] include Aws::Structure end |
#table_name ⇒ String
The name of the DynamoDB table.
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# File 'gems/aws-sdk-iotevents/lib/aws-sdk-iotevents/types.rb', line 1661 class DynamoDBv2Action < Struct.new( :table_name, :payload) SENSITIVE = [] include Aws::Structure end |