class CfnGroup (construct)

Language	Type name
.NET	Amazon.CDK.AWS.Greengrass.CfnGroup
Go	github.com/aws/aws-cdk-go/awscdk/v2/awsgreengrass#CfnGroup
Java	software.amazon.awscdk.services.greengrass.CfnGroup
Python	aws_cdk.aws_greengrass.CfnGroup
TypeScript	aws-cdk-lib » aws_greengrass » CfnGroup

Implements IConstruct, IDependable, IInspectable, ITaggable

AWS IoT Greengrass seamlessly extends AWS to edge devices so they can act locally on the data they generate, while still using the cloud for management, analytics, and durable storage.

With AWS IoT Greengrass , connected devices can run AWS Lambda functions, execute predictions based on machine learning models, keep device data in sync, and communicate with other devices securely – even when not connected to the internet. For more information, see the Developer Guide .

For AWS Region support, see AWS CloudFormation Support for AWS IoT Greengrass in the Developer Guide .

The AWS::Greengrass::Group resource represents a group in AWS IoT Greengrass . In the AWS IoT Greengrass API, groups are used to organize your group versions.

Groups can reference multiple group versions. All group versions must be associated with a group. A group version references a device definition version, subscription definition version, and other version types that contain the components you want to deploy to a Greengrass core device.

To deploy a group version, the group version must reference a core definition version that contains one core. Other version types are optionally included, depending on your business need.

When you create a group, you can optionally include an initial group version. To associate a group version later, create a AWS::Greengrass::GroupVersion resource and specify the ID of this group.

To change group components (such as devices, subscriptions, or functions), you must create new versions. This is because versions are immutable. For example, to add a function, you create a function definition version that contains the new function (and all other functions that you want to deploy). Then you create a group version that references the new function definition version (and all other version types that you want to deploy).

Deploying a Group Version

After you create the group version in your AWS CloudFormation template, you can deploy it using the aws greengrass create-deployment command in the AWS CLI or from the Greengrass node in the AWS IoT console. To deploy a group version, you must have a Greengrass service role associated with your AWS account . For more information, see AWS CloudFormation Support for AWS IoT Greengrass in the Developer Guide .

See also: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-greengrass-group.html

Example

// The code below shows an example of how to instantiate this type.
// The values are placeholders you should change.
import { aws_greengrass as greengrass } from 'aws-cdk-lib';

declare const tags: any;
const cfnGroup = new greengrass.CfnGroup(this, 'MyCfnGroup', {
  name: 'name',

  // the properties below are optional
  initialVersion: {
    connectorDefinitionVersionArn: 'connectorDefinitionVersionArn',
    coreDefinitionVersionArn: 'coreDefinitionVersionArn',
    deviceDefinitionVersionArn: 'deviceDefinitionVersionArn',
    functionDefinitionVersionArn: 'functionDefinitionVersionArn',
    loggerDefinitionVersionArn: 'loggerDefinitionVersionArn',
    resourceDefinitionVersionArn: 'resourceDefinitionVersionArn',
    subscriptionDefinitionVersionArn: 'subscriptionDefinitionVersionArn',
  },
  roleArn: 'roleArn',
  tags: tags,
});

Initializer

new CfnGroup(scope: Construct, id: string, props: CfnGroupProps)

Parameters

• scope Construct — Scope in which this resource is defined.
• id string — Construct identifier for this resource (unique in its scope).
• props CfnGroupProps — Resource properties.

Construct Props

Name	Type	Description
name	string	The name of the group.
initialVersion?	IResolvable | GroupVersionProperty	The group version to include when the group is created.
roleArn?	string	The Amazon Resource Name (ARN) of the IAM role attached to the group.
tags?	any	Application-specific metadata to attach to the group.

---

name

Type: string

The name of the group.

See also: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-greengrass-group.html#cfn-greengrass-group-name

---

initialVersion?

Type: IResolvable | GroupVersionProperty (optional)

The group version to include when the group is created.

A group version references the Amazon Resource Name (ARN) of a core definition version, device definition version, subscription definition version, and other version types. The group version must reference a core definition version that contains one core. Other version types are optionally included, depending on your business need.

To associate a group version after the group is created, create an AWS::Greengrass::GroupVersion resource and specify the ID of this group.

See also: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-greengrass-group.html#cfn-greengrass-group-initialversion

---

roleArn?

Type: string (optional)

The Amazon Resource Name (ARN) of the IAM role attached to the group.

This role contains the permissions that Lambda functions and connectors use to interact with other AWS services.

See also: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-greengrass-group.html#cfn-greengrass-group-rolearn

---

tags?

Type: any (optional)

Application-specific metadata to attach to the group.

You can use tags in IAM policies to control access to AWS IoT Greengrass resources. You can also use tags to categorize your resources. For more information, see Tagging Your AWS IoT Greengrass Resources in the Developer Guide .

This Json property type is processed as a map of key-value pairs. It uses the following format, which is different from most Tags implementations in AWS CloudFormation templates.

"Tags": { "KeyName0": "value", "KeyName1": "value", "KeyName2": "value"
}

See also: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-greengrass-group.html#cfn-greengrass-group-tags

Properties

Name	Type	Description
attrArn	string	The ARN of the Group , such as arn:aws:greengrass:us-east-1: :/greengrass/definition/groups/1234a5b6-78cd-901e-2fgh-3i45j6k178l9 .
attrId	string	The ID of the Group , such as 1234a5b6-78cd-901e-2fgh-3i45j6k178l9 .
attrLatestVersionArn	string	The ARN of the last GroupVersion that was added to the Group , such as arn:aws:greengrass:us-east-1: :/greengrass/definition/groups/1234a5b6-78cd-901e-2fgh-3i45j6k178l9/versions/9876ac30-4bdb-4f9d-95af-b5fdb66be1a2 .
attrName	string	The name of the Group , such as MyGroup .
attrRoleArn	string	The ARN of the IAM role that's attached to the Group , such as arn:aws:iam:: :role/role-name .
attrRoleAttachedAt	string	The time (in milliseconds since the epoch) when the group role was attached to the Group .
cfnOptions	ICfnResourceOptions	Options for this resource, such as condition, update policy etc.
cfnProperties	{ [string]: any }
cfnResourceType	string	AWS resource type.
creationStack	string[]
logicalId	string	The logical ID for this CloudFormation stack element.
name	string	The name of the group.
node	Node	The tree node.
ref	string	Return a string that will be resolved to a CloudFormation { Ref } for this element.
stack	Stack	The stack in which this element is defined.
tags	TagManager	Tag Manager which manages the tags for this resource.
initialVersion?	IResolvable | GroupVersionProperty	The group version to include when the group is created.
roleArn?	string	The Amazon Resource Name (ARN) of the IAM role attached to the group.
tagsRaw?	any	Application-specific metadata to attach to the group.
static CFN_RESOURCE_TYPE_NAME	string	The CloudFormation resource type name for this resource class.

---

attrArn

Type: string

The ARN of the Group , such as arn:aws:greengrass:us-east-1: :/greengrass/definition/groups/1234a5b6-78cd-901e-2fgh-3i45j6k178l9 .

---

attrId

Type: string

The ID of the Group , such as 1234a5b6-78cd-901e-2fgh-3i45j6k178l9 .

---

attrLatestVersionArn

Type: string

The ARN of the last GroupVersion that was added to the Group , such as arn:aws:greengrass:us-east-1: :/greengrass/definition/groups/1234a5b6-78cd-901e-2fgh-3i45j6k178l9/versions/9876ac30-4bdb-4f9d-95af-b5fdb66be1a2 .

---

attrName

Type: string

The name of the Group , such as MyGroup .

---

attrRoleArn

Type: string

The ARN of the IAM role that's attached to the Group , such as arn:aws:iam:: :role/role-name .

---

attrRoleAttachedAt

Type: string

The time (in milliseconds since the epoch) when the group role was attached to the Group .

---

cfnOptions

Type: ICfnResourceOptions

Options for this resource, such as condition, update policy etc.

---

cfnProperties

Type: { [string]: any }

---

cfnResourceType

Type: string

AWS resource type.

---

creationStack

Type: string[]

---

logicalId

Type: string

The logical ID for this CloudFormation stack element.

The logical ID of the element is calculated from the path of the resource node in the construct tree.

To override this value, use overrideLogicalId(newLogicalId).

---

name

Type: string

The name of the group.

---

node

Type: Node

The tree node.

---

ref

Type: string

Return a string that will be resolved to a CloudFormation { Ref } for this element.

If, by any chance, the intrinsic reference of a resource is not a string, you could coerce it to an IResolvable through Lazy.any({ produce: resource.ref }).

---

stack

Type: Stack

The stack in which this element is defined.

CfnElements must be defined within a stack scope (directly or indirectly).

---

tags

Type: TagManager

Tag Manager which manages the tags for this resource.

---

initialVersion?

Type: IResolvable | GroupVersionProperty (optional)

The group version to include when the group is created.

---

roleArn?

Type: string (optional)

The Amazon Resource Name (ARN) of the IAM role attached to the group.

---

tagsRaw?

Type: any (optional)

Application-specific metadata to attach to the group.

---

static CFN_RESOURCE_TYPE_NAME

Type: string

The CloudFormation resource type name for this resource class.

Methods

Name	Description
addDeletionOverride(path)	Syntactic sugar for addOverride(path, undefined).
addDependency(target)	Indicates that this resource depends on another resource and cannot be provisioned unless the other resource has been successfully provisioned.
addDependsOn(target)⚠️	Indicates that this resource depends on another resource and cannot be provisioned unless the other resource has been successfully provisioned.
addMetadata(key, value)	Add a value to the CloudFormation Resource Metadata.
addOverride(path, value)	Adds an override to the synthesized CloudFormation resource.
addPropertyDeletionOverride(propertyPath)	Adds an override that deletes the value of a property from the resource definition.
addPropertyOverride(propertyPath, value)	Adds an override to a resource property.
applyRemovalPolicy(policy?, options?)	Sets the deletion policy of the resource based on the removal policy specified.
getAtt(attributeName, typeHint?)	Returns a token for an runtime attribute of this resource.
getMetadata(key)	Retrieve a value value from the CloudFormation Resource Metadata.
inspect(inspector)	Examines the CloudFormation resource and discloses attributes.
obtainDependencies()	Retrieves an array of resources this resource depends on.
obtainResourceDependencies()	Get a shallow copy of dependencies between this resource and other resources in the same stack.
overrideLogicalId(newLogicalId)	Overrides the auto-generated logical ID with a specific ID.
removeDependency(target)	Indicates that this resource no longer depends on another resource.
replaceDependency(target, newTarget)	Replaces one dependency with another.
toString()	Returns a string representation of this construct.
protected renderProperties(props)

---

addDeletionOverride(path)

public addDeletionOverride(path: string): void

Parameters

• path string — The path of the value to delete.

Syntactic sugar for addOverride(path, undefined).

---

addDependency(target)

public addDependency(target: CfnResource): void

Parameters

• target CfnResource

Indicates that this resource depends on another resource and cannot be provisioned unless the other resource has been successfully provisioned.

This can be used for resources across stacks (or nested stack) boundaries and the dependency will automatically be transferred to the relevant scope.

---

addDependsOn(target)⚠️

public addDependsOn(target: CfnResource): void

⚠️ Deprecated: use addDependency

Parameters

• target CfnResource

Indicates that this resource depends on another resource and cannot be provisioned unless the other resource has been successfully provisioned.

---

addMetadata(key, value)

public addMetadata(key: string, value: any): void

Parameters

• key string
• value any

Add a value to the CloudFormation Resource Metadata.

See also: [https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/metadata-section-structure.html

Note that this is a different set of metadata from CDK node metadata; this metadata ends up in the stack template under the resource, whereas CDK node metadata ends up in the Cloud Assembly.](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/metadata-section-structure.html

Note that this is a different set of metadata from CDK node metadata; this metadata ends up in the stack template under the resource, whereas CDK node metadata ends up in the Cloud Assembly.)

---

addOverride(path, value)

public addOverride(path: string, value: any): void

Parameters

• path string — - The path of the property, you can use dot notation to override values in complex types.
• value any — - The value.

Adds an override to the synthesized CloudFormation resource.

To add a property override, either use addPropertyOverride or prefix path with "Properties." (i.e. Properties.TopicName).

If the override is nested, separate each nested level using a dot (.) in the path parameter. If there is an array as part of the nesting, specify the index in the path.

To include a literal . in the property name, prefix with a \. In most programming languages you will need to write this as "\\." because the \ itself will need to be escaped.

For example,

cfnResource.addOverride('Properties.GlobalSecondaryIndexes.0.Projection.NonKeyAttributes', ['myattribute']);
cfnResource.addOverride('Properties.GlobalSecondaryIndexes.1.ProjectionType', 'INCLUDE');

would add the overrides

"Properties": {
  "GlobalSecondaryIndexes": [
    {
      "Projection": {
        "NonKeyAttributes": [ "myattribute" ]
        ...
      }
      ...
    },
    {
      "ProjectionType": "INCLUDE"
      ...
    },
  ]
  ...
}

The value argument to addOverride will not be processed or translated in any way. Pass raw JSON values in here with the correct capitalization for CloudFormation. If you pass CDK classes or structs, they will be rendered with lowercased key names, and CloudFormation will reject the template.

---

addPropertyDeletionOverride(propertyPath)

public addPropertyDeletionOverride(propertyPath: string): void

Parameters

• propertyPath string — The path to the property.

Adds an override that deletes the value of a property from the resource definition.

---

addPropertyOverride(propertyPath, value)

public addPropertyOverride(propertyPath: string, value: any): void

Parameters

• propertyPath string — The path of the property.
• value any — The value.

Adds an override to a resource property.

Syntactic sugar for addOverride("Properties.<...>", value).

---

applyRemovalPolicy(policy?, options?)

public applyRemovalPolicy(policy?: RemovalPolicy, options?: RemovalPolicyOptions): void

Parameters

• policy RemovalPolicy
• options RemovalPolicyOptions

Sets the deletion policy of the resource based on the removal policy specified.

The Removal Policy controls what happens to this resource when it stops being managed by CloudFormation, either because you've removed it from the CDK application or because you've made a change that requires the resource to be replaced.

The resource can be deleted (RemovalPolicy.DESTROY), or left in your AWS account for data recovery and cleanup later (RemovalPolicy.RETAIN). In some cases, a snapshot can be taken of the resource prior to deletion (RemovalPolicy.SNAPSHOT). A list of resources that support this policy can be found in the following link:

See also: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-attribute-deletionpolicy.html#aws-attribute-deletionpolicy-options

---

getAtt(attributeName, typeHint?)

public getAtt(attributeName: string, typeHint?: ResolutionTypeHint): Reference

Parameters

• attributeName string — The name of the attribute.
• typeHint ResolutionTypeHint

Returns

• Reference

Returns a token for an runtime attribute of this resource.

Ideally, use generated attribute accessors (e.g. resource.arn), but this can be used for future compatibility in case there is no generated attribute.

---

getMetadata(key)

public getMetadata(key: string): any

Parameters

• key string

Returns

• any

Retrieve a value value from the CloudFormation Resource Metadata.

See also: [https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/metadata-section-structure.html

Note that this is a different set of metadata from CDK node metadata; this metadata ends up in the stack template under the resource, whereas CDK node metadata ends up in the Cloud Assembly.](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/metadata-section-structure.html

Note that this is a different set of metadata from CDK node metadata; this metadata ends up in the stack template under the resource, whereas CDK node metadata ends up in the Cloud Assembly.)

---

inspect(inspector)

public inspect(inspector: TreeInspector): void

Parameters

• inspector TreeInspector — tree inspector to collect and process attributes.

Examines the CloudFormation resource and discloses attributes.

---

obtainDependencies()

public obtainDependencies(): Stack | CfnResource[]

Returns

• Stack | CfnResource[]

Retrieves an array of resources this resource depends on.

This assembles dependencies on resources across stacks (including nested stacks) automatically.

---

obtainResourceDependencies()

public obtainResourceDependencies(): CfnResource[]

Returns

• CfnResource[]

Get a shallow copy of dependencies between this resource and other resources in the same stack.

---

overrideLogicalId(newLogicalId)

public overrideLogicalId(newLogicalId: string): void

Parameters

• newLogicalId string — The new logical ID to use for this stack element.

Overrides the auto-generated logical ID with a specific ID.

---

removeDependency(target)

public removeDependency(target: CfnResource): void

Parameters

• target CfnResource

Indicates that this resource no longer depends on another resource.

This can be used for resources across stacks (including nested stacks) and the dependency will automatically be removed from the relevant scope.

---

replaceDependency(target, newTarget)

public replaceDependency(target: CfnResource, newTarget: CfnResource): void

Parameters

• target CfnResource — The dependency to replace.
• newTarget CfnResource — The new dependency to add.

Replaces one dependency with another.

---

toString()

public toString(): string

Returns

• string

Returns a string representation of this construct.

---

protected renderProperties(props)

protected renderProperties(props: { [string]: any }): { [string]: any }

Parameters

• props { [string]: any }

Returns

• { [string]: any }