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snapshotter.go
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snapshotter.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 v3
import (
"context"
envoy_types "github.com/envoyproxy/go-control-plane/pkg/cache/types"
envoy_cache_v3 "github.com/envoyproxy/go-control-plane/pkg/cache/v3"
envoy_log "github.com/envoyproxy/go-control-plane/pkg/log"
envoy_resource_v3 "github.com/envoyproxy/go-control-plane/pkg/resource/v3"
"github.com/projectcontour/contour/internal/xds"
"github.com/projectcontour/contour/internal/xdscache"
)
var Hash = xds.ConstantHashV3{}
// Snapshotter is a v3 Snapshot cache that implements the xds.Snapshotter interface.
type Snapshotter interface {
xdscache.Snapshotter
envoy_cache_v3.SnapshotCache
}
type snapshotter struct {
envoy_cache_v3.SnapshotCache
}
func (s *snapshotter) Generate(version string, resources map[envoy_resource_v3.Type][]envoy_types.Resource) error {
// Create a snapshot with all xDS resources.
snapshot, err := envoy_cache_v3.NewSnapshot(
version,
resources,
)
if err != nil {
return err
}
return s.SetSnapshot(context.TODO(), Hash.String(), snapshot)
}
func NewSnapshotCache(ads bool, logger envoy_log.Logger) Snapshotter {
return &snapshotter{
SnapshotCache: envoy_cache_v3.NewSnapshotCache(ads, &Hash, logger),
}
}