AWS::Logs::Transformer ListToMap - AWS CloudFormation
SyntaxProperties

AWS::Logs::Transformer ListToMap

This processor takes a list of objects that contain key fields, and converts them into a map of target keys.

For more information about this processor including examples, see listToMap in the CloudWatch Logs User Guide.

Syntax

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

JSON

{
  "Flatten" : Boolean,
  "FlattenedElement" : String,
  "Key" : String,
  "Source" : String,
  "Target" : String,
  "ValueKey" : String
}

YAML

  Flatten: Boolean
  FlattenedElement: String
  Key: String
  Source: String
  Target: String
  ValueKey: String

Properties

Flatten

A Boolean value to indicate whether the list will be flattened into single items. Specify true to flatten the list. The default is false

Required: No

Type: Boolean

Update requires: No interruption

FlattenedElement

If you set flatten to true, use flattenedElement to specify which element, first or last, to keep.

You must specify this parameter if flatten is true

Required: No

Type: String

Allowed values: first | last

Update requires: No interruption

Key

The key of the field to be extracted as keys in the generated map

Required: Yes

Type: String

Pattern: ^.*[a-zA-Z0-9]+.*$

Update requires: No interruption

Source

The key in the log event that has a list of objects that will be converted to a map.

Required: Yes

Type: String

Pattern: ^.*[a-zA-Z0-9]+.*$

Update requires: No interruption

Target

The key of the field that will hold the generated map

Required: No

Type: String

Pattern: ^.*[a-zA-Z0-9]+.*$

Maximum: 128

Update requires: No interruption

ValueKey

If this is specified, the values that you specify in this parameter will be extracted from the source objects and put into the values of the generated map. Otherwise, original objects in the source list will be put into the values of the generated map.

Required: No

Type: String

Pattern: ^.*[a-zA-Z0-9]+.*$

Update requires: No interruption