/
builder.go
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/
builder.go
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// Copyright Project Contour 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
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package dag
import (
"github.com/projectcontour/contour/internal/k8s"
"github.com/projectcontour/contour/internal/status"
"k8s.io/apimachinery/pkg/types"
gatewayapi_v1beta1 "sigs.k8s.io/gateway-api/apis/v1beta1"
)
// Processor constructs part of a DAG.
type Processor interface {
// Run executes the processor.
Run(dag *DAG, source *KubernetesCache)
}
// ProcessorFunc adapts a function to the Processor interface.
type ProcessorFunc func(*DAG, *KubernetesCache)
func (pf ProcessorFunc) Run(dag *DAG, source *KubernetesCache) {
if pf != nil {
pf(dag, source)
}
}
// Builder builds a DAG.
type Builder struct {
// Source is the source of Kubernetes objects
// from which to build a DAG.
Source KubernetesCache
// Processors is the ordered list of Processors to
// use to build the DAG.
Processors []Processor
}
// Build builds and returns a new DAG by running the
// configured DAG processors, in order.
func (b *Builder) Build() *DAG {
gatewayNSName := types.NamespacedName{}
if b.Source.gateway != nil {
gatewayNSName = k8s.NamespacedNameOf(b.Source.gateway)
}
var gatewayController gatewayapi_v1beta1.GatewayController
if b.Source.gatewayclass != nil {
gatewayController = b.Source.gatewayclass.Spec.ControllerName
}
dag := &DAG{
VirtualHosts: map[string]*VirtualHost{},
SecureVirtualHosts: map[string]*SecureVirtualHost{},
StatusCache: status.NewCache(gatewayNSName, gatewayController),
}
for _, p := range b.Processors {
p.Run(dag, &b.Source)
}
return dag
}