class aws_cdk.aws_globalaccelerator.Listener(scope, id, *, accelerator, port_ranges, client_affinity=None, listener_name=None, protocol=None)

Bases: Resource

The construct for the Listener.




# Create an Accelerator
accelerator = globalaccelerator.Accelerator(self, "Accelerator")

# Create a Listener
listener = accelerator.add_listener("Listener",
    port_ranges=[globalaccelerator.PortRange(from_port=80), globalaccelerator.PortRange(from_port=443)

# Import the Load Balancers
nlb1 = elbv2.NetworkLoadBalancer.from_network_load_balancer_attributes(self, "NLB1",
nlb2 = elbv2.NetworkLoadBalancer.from_network_load_balancer_attributes(self, "NLB2",

# Add one EndpointGroup for each Region we are targeting
    # Imported load balancers automatically calculate their Region from the ARN.
    # If you are load balancing to other resources, you must also pass a `region`
    # parameter here.
  • scope (Construct) –

  • id (str) –

  • accelerator (IAccelerator) – The accelerator for this listener.

  • port_ranges (Sequence[Union[PortRange, Dict[str, Any]]]) – The list of port ranges for the connections from clients to the accelerator.

  • client_affinity (Optional[ClientAffinity]) – Client affinity to direct all requests from a user to the same endpoint. If you have stateful applications, client affinity lets you direct all requests from a user to the same endpoint. By default, each connection from each client is routed to seperate endpoints. Set client affinity to SOURCE_IP to route all connections from a single client to the same endpoint. Default: ClientAffinity.NONE

  • listener_name (Optional[str]) – Name of the listener. Default: - logical ID of the resource

  • protocol (Optional[ConnectionProtocol]) – The protocol for the connections from clients to the accelerator. Default: ConnectionProtocol.TCP


add_endpoint_group(id, *, endpoint_group_name=None, endpoints=None, health_check_interval=None, health_check_path=None, health_check_port=None, health_check_protocol=None, health_check_threshold=None, port_overrides=None, region=None, traffic_dial_percentage=None)

Add a new endpoint group to this listener.

  • id (str) –

  • endpoint_group_name (Optional[str]) – Name of the endpoint group. Default: - logical ID of the resource

  • endpoints (Optional[Sequence[IEndpoint]]) – Initial list of endpoints for this group. Default: - Group is initially empty

  • health_check_interval (Optional[Duration]) – The time between health checks for each endpoint. Must be either 10 or 30 seconds. Default: Duration.seconds(30)

  • health_check_path (Optional[str]) – The ping path for health checks (if the protocol is HTTP(S)). Default: ‘/’

  • health_check_port (Union[int, float, None]) – The port used to perform health checks. Default: - The listener’s port

  • health_check_protocol (Optional[HealthCheckProtocol]) – The protocol used to perform health checks. Default: HealthCheckProtocol.TCP

  • health_check_threshold (Union[int, float, None]) – The number of consecutive health checks required to set the state of a healthy endpoint to unhealthy, or to set an unhealthy endpoint to healthy. Default: 3

  • port_overrides (Optional[Sequence[Union[PortOverride, Dict[str, Any]]]]) – Override the destination ports used to route traffic to an endpoint. Unless overridden, the port used to hit the endpoint will be the same as the port that traffic arrives on at the listener. Default: - No overrides

  • region (Optional[str]) – The AWS Region where the endpoint group is located. Default: - region of the first endpoint in this group, or the stack region if that region can’t be determined

  • traffic_dial_percentage (Union[int, float, None]) – The percentage of traffic to send to this AWS Region. The percentage is applied to the traffic that would otherwise have been routed to the Region based on optimal routing. Additional traffic is distributed to other endpoint groups for this listener. Default: 100

Return type:



Apply the given removal policy to this resource.

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).


policy (RemovalPolicy) –

Return type:



Returns a string representation of this construct.

Return type:




The environment this resource belongs to.

For resources that are created and managed by the CDK (generally, those created by creating new class instances like Role, Bucket, etc.), this is always the same as the environment of the stack they belong to; however, for imported resources (those obtained from static methods like fromRoleArn, fromBucketName, etc.), that might be different than the stack they were imported into.


The ARN of the listener.


The name of the listener.




The construct tree node associated with this construct.


The stack in which this resource is defined.

Static Methods

classmethod from_listener_arn(scope, id, listener_arn)

import from ARN.

  • scope (Construct) –

  • id (str) –

  • listener_arn (str) –

Return type:


classmethod is_construct(x)

Return whether the given object is a Construct.


x (Any) –

Return type:


classmethod is_resource(construct)

Check whether the given construct is a Resource.


construct (IConstruct) –

Return type: