Class CfnAlarmModel.DynamoDBv2Property
Defines an action to write to the Amazon DynamoDB table that you created.
Inheritance
Implements
Namespace: Amazon.CDK.AWS.IoTEvents
Assembly: Amazon.CDK.AWS.IoTEvents.dll
Syntax (csharp)
public class DynamoDBv2Property : Object, CfnAlarmModel.IDynamoDBv2Property
Syntax (vb)
Public Class DynamoDBv2Property
Inherits Object
Implements CfnAlarmModel.IDynamoDBv2Property
Remarks
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'
.
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}"}'
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
.
ExampleMetadata: fixture=_generated
Examples
// The code below shows an example of how to instantiate this type.
// The values are placeholders you should change.
using Amazon.CDK.AWS.IoTEvents;
var dynamoDBv2Property = new DynamoDBv2Property {
TableName = "tableName",
// the properties below are optional
Payload = new PayloadProperty {
ContentExpression = "contentExpression",
Type = "type"
}
};
Synopsis
Constructors
DynamoDBv2Property() |
Properties
Payload | Information needed to configure the payload. |
TableName | The name of the DynamoDB table. |
Constructors
DynamoDBv2Property()
public DynamoDBv2Property()
Properties
Payload
Information needed to configure the payload.
public object Payload { get; set; }
Property Value
System.Object
Remarks
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
.
TableName
The name of the DynamoDB table.
public string TableName { get; set; }
Property Value
System.String