drone/app/store/cache/path.go

76 lines
2.1 KiB
Go

// Copyright 2023 Harness, Inc.
//
// 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 cache
import (
"context"
"time"
"github.com/harness/gitness/app/paths"
"github.com/harness/gitness/app/store"
"github.com/harness/gitness/cache"
"github.com/harness/gitness/types"
)
// pathCacheGetter is used to hook a SpacePathStore as source of a PathCache.
// IMPORTANT: It assumes that the pathCache already transformed the key.
type pathCacheGetter struct {
spacePathStore store.SpacePathStore
}
func New(
pathStore store.SpacePathStore,
spacePathTransformation store.SpacePathTransformation,
) store.SpacePathCache {
return &pathCache{
inner: cache.New[string, *types.SpacePath](
&pathCacheGetter{
spacePathStore: pathStore,
},
1*time.Minute),
spacePathTransformation: spacePathTransformation,
}
}
func (g *pathCacheGetter) Find(ctx context.Context, key string) (*types.SpacePath, error) {
path, err := g.spacePathStore.FindByPath(ctx, key)
if err != nil {
return nil, err
}
return path, nil
}
// pathCache is a decorator of a Cache required to handle path transformations.
type pathCache struct {
inner cache.Cache[string, *types.SpacePath]
spacePathTransformation store.SpacePathTransformation
}
func (c *pathCache) Get(ctx context.Context, key string) (*types.SpacePath, error) {
// build unique key from provided value
segments := paths.Segments(key)
uniqueKey := ""
for i, segment := range segments {
uniqueKey = paths.Concatenate(uniqueKey, c.spacePathTransformation(segment, i == 0))
}
return c.inner.Get(ctx, uniqueKey)
}
func (c *pathCache) Stats() (int64, int64) {
return c.inner.Stats()
}