IApplicationListener

class aws_cdk.aws_elasticloadbalancingv2.IApplicationListener(*args, **kwargs)

Bases: IListener, IConnectable, Protocol

Properties to reference an existing listener.

Methods

add_action(id, *, action, remove_suffix=None, conditions=None, priority=None)

Perform the given action on incoming requests.

This allows full control of the default action of the load balancer, including Action chaining, fixed responses and redirect responses. See the ListenerAction class for all options.

It’s possible to add routing conditions to the Action added in this way.

It is not possible to add a default action to an imported IApplicationListener. In order to add actions to an imported IApplicationListener a priority must be provided.

Parameters:
  • id (str) –

  • action (ListenerAction) – Action to perform.

  • remove_suffix (Optional[bool]) – ListenerRule``s have a ``Rule suffix on their logicalId by default. This allows you to remove that suffix. Legacy behavior of the addTargetGroups() convenience method did not include the Rule suffix on the logicalId of the generated ListenerRule. At some point, increasing complexity of requirements can require users to switch from the addTargetGroups() method to the addAction() method. When migrating ListenerRule``s deployed by a legacy version of ``addTargetGroups(), you will need to enable this flag to avoid changing the logicalId of your resource. Otherwise Cfn will attempt to replace the ListenerRule and fail. Default: - use standard logicalId with the Rule suffix

  • conditions (Optional[Sequence[ListenerCondition]]) – Rule applies if matches the conditions. Default: - No conditions.

  • priority (Union[int, float, None]) – Priority of this target group. The rule with the lowest priority will be used for every request. If priority is not given, these target groups will be added as defaults, and must not have conditions. Priorities must be unique. Default: Target groups are used as defaults

Return type:

None

add_certificates(id, certificates)

Add one or more certificates to this listener.

Parameters:
Return type:

None

add_target_groups(id, *, target_groups, conditions=None, priority=None)

Load balance incoming requests to the given target groups.

It’s possible to add conditions to the TargetGroups added in this way. At least one TargetGroup must be added without conditions.

Parameters:
  • id (str) –

  • target_groups (Sequence[IApplicationTargetGroup]) – Target groups to forward requests to.

  • conditions (Optional[Sequence[ListenerCondition]]) – Rule applies if matches the conditions. Default: - No conditions.

  • priority (Union[int, float, None]) – Priority of this target group. The rule with the lowest priority will be used for every request. If priority is not given, these target groups will be added as defaults, and must not have conditions. Priorities must be unique. Default: Target groups are used as defaults

Return type:

None

add_targets(id, *, deregistration_delay=None, health_check=None, load_balancing_algorithm_type=None, port=None, protocol=None, protocol_version=None, slow_start=None, stickiness_cookie_duration=None, stickiness_cookie_name=None, target_group_name=None, targets=None, conditions=None, priority=None)

Load balance incoming requests to the given load balancing targets.

This method implicitly creates an ApplicationTargetGroup for the targets involved.

It’s possible to add conditions to the targets added in this way. At least one set of targets must be added without conditions.

Parameters:
  • id (str) –

  • deregistration_delay (Optional[Duration]) – The amount of time for Elastic Load Balancing to wait before deregistering a target. The range is 0-3600 seconds. Default: Duration.minutes(5)

  • health_check (Union[HealthCheck, Dict[str, Any], None]) – Health check configuration. Default: - The default value for each property in this configuration varies depending on the target.

  • load_balancing_algorithm_type (Optional[TargetGroupLoadBalancingAlgorithmType]) – The load balancing algorithm to select targets for routing requests. Default: round_robin.

  • port (Union[int, float, None]) – The port on which the listener listens for requests. Default: Determined from protocol if known

  • protocol (Optional[ApplicationProtocol]) – The protocol to use. Default: Determined from port if known

  • protocol_version (Optional[ApplicationProtocolVersion]) – The protocol version to use. Default: ApplicationProtocolVersion.HTTP1

  • slow_start (Optional[Duration]) – The time period during which the load balancer sends a newly registered target a linearly increasing share of the traffic to the target group. The range is 30-900 seconds (15 minutes). Default: 0

  • stickiness_cookie_duration (Optional[Duration]) – The stickiness cookie expiration period. Setting this value enables load balancer stickiness. After this period, the cookie is considered stale. The minimum value is 1 second and the maximum value is 7 days (604800 seconds). Default: Stickiness disabled

  • stickiness_cookie_name (Optional[str]) – The name of an application-based stickiness cookie. Names that start with the following prefixes are not allowed: AWSALB, AWSALBAPP, and AWSALBTG; they’re reserved for use by the load balancer. Note: stickinessCookieName parameter depends on the presence of stickinessCookieDuration parameter. If stickinessCookieDuration is not set, stickinessCookieName will be omitted. Default: - If stickinessCookieDuration is set, a load-balancer generated cookie is used. Otherwise, no stickiness is defined.

  • target_group_name (Optional[str]) – The name of the target group. This name must be unique per region per account, can have a maximum of 32 characters, must contain only alphanumeric characters or hyphens, and must not begin or end with a hyphen. Default: Automatically generated

  • targets (Optional[Sequence[IApplicationLoadBalancerTarget]]) – The targets to add to this target group. Can be Instance, IPAddress, or any self-registering load balancing target. All target must be of the same type.

  • conditions (Optional[Sequence[ListenerCondition]]) – Rule applies if matches the conditions. Default: - No conditions.

  • priority (Union[int, float, None]) – Priority of this target group. The rule with the lowest priority will be used for every request. If priority is not given, these target groups will be added as defaults, and must not have conditions. Priorities must be unique. Default: Target groups are used as defaults

Return type:

ApplicationTargetGroup

Returns:

The newly created target group

apply_removal_policy(policy)

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).

Parameters:

policy (RemovalPolicy) –

Return type:

None

register_connectable(connectable, port_range)

Register that a connectable that has been added to this load balancer.

Don’t call this directly. It is called by ApplicationTargetGroup.

Parameters:
Return type:

None

Attributes

connections

The network connections associated with this resource.

env

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.

listener_arn

ARN of the listener.

Attribute:

true

node

The tree node.

stack

The stack in which this resource is defined.