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* Copyright 2019 The Knative Authors
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
package v1alpha1
import (
corev1 ""
metav1 ""
eventingduck ""
duckv1 ""
duckv1alpha1 ""
// +genclient
// Channel represents a generic Channel. It is normally used when we want a Channel, but don't need a specific Channel implementation.
type Channel struct {
metav1.TypeMeta `json:",inline"`
// +optional
metav1.ObjectMeta `json:"metadata,omitempty"`
// Spec defines the desired state of the Channel.
Spec ChannelSpec `json:"spec,omitempty"`
// Status represents the current state of the Channel. This data may be out of
// date.
// +optional
Status ChannelStatus `json:"status,omitempty"`
var (
// Check that Channel can be validated and defaulted.
_ apis.Validatable = (*Channel)(nil)
_ apis.Defaultable = (*Channel)(nil)
// Check that Channel can return its spec untyped.
_ apis.HasSpec = (*Channel)(nil)
_ runtime.Object = (*Channel)(nil)
// Check that we can create OwnerReferences to a Channel.
_ kmeta.OwnerRefable = (*Channel)(nil)
// ChannelSpec defines which subscribers have expressed interest in receiving events from this Channel.
// It also defines the ChannelTemplate to use in order to create the CRD Channel backing this Channel.
type ChannelSpec struct {
// ChannelTemplate specifies which Channel CRD to use to create the CRD Channel backing this Channel.
// This is immutable after creation. Normally this is set by the Channel defaulter, not directly by the user.
ChannelTemplate *eventingduck.ChannelTemplateSpec `json:"channelTemplate"`
// Channel conforms to Duck type Subscribable.
Subscribable *eventingduck.Subscribable `json:"subscribable,omitempty"`
// ChannelStatus represents the current state of a Channel.
type ChannelStatus struct {
// inherits duck/v1 Status, which currently provides:
// * ObservedGeneration - the 'Generation' of the Service that was last processed by the controller.
// * Conditions - the latest available observations of a resource's current state.
duckv1.Status `json:",inline"`
// Channel is Addressable. It currently exposes the endpoint as a
// fully-qualified DNS name which will distribute traffic over the
// provided targets from inside the cluster.
// It generally has the form {channel}.{namespace}.svc.{cluster domain name}
duckv1alpha1.AddressStatus `json:",inline"`
// Subscribers is populated with the statuses of each of the Channelable's subscribers.
eventingduck.SubscribableTypeStatus `json:",inline"`
// Channel is an ObjectReference to the Channel CRD backing this Channel.
Channel *corev1.ObjectReference `json:"channel,omitempty"`
// ChannelList is a collection of Channels.
type ChannelList struct {
metav1.TypeMeta `json:",inline"`
// +optional
metav1.ListMeta `json:"metadata,omitempty"`
Items []Channel `json:"items"`
// GetGroupVersionKind returns GroupVersionKind for Channels.
func (dc *Channel) GetGroupVersionKind() schema.GroupVersionKind {
return SchemeGroupVersion.WithKind("Channel")
// GetUntypedSpec returns the spec of the Channel.
func (c *Channel) GetUntypedSpec() interface{} {
return c.Spec
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