60 lines
1.6 KiB
Go
60 lines
1.6 KiB
Go
// Copyright 2019 Drone IO, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cache
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import (
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"context"
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"fmt"
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"github.com/drone/drone/core"
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"github.com/hashicorp/golang-lru"
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)
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// content key pattern used in the cache, comprised of the
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// repository slug, commit and path.
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const contentKey = "%s/%s/%s"
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// Contents returns a new FileService that is wrapped
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// with an in-memory cache.
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func Contents(base core.FileService) core.FileService {
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// simple cache prevents the same yaml file from being
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// requested multiple times in a short period.
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cache, _ := lru.New(25)
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return &service{
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service: base,
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cache: cache,
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}
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}
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type service struct {
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cache *lru.Cache
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service core.FileService
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user *core.User
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}
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func (s *service) Find(ctx context.Context, user *core.User, repo, commit, ref, path string) (*core.File, error) {
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key := fmt.Sprintf(contentKey, repo, commit, path)
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cached, ok := s.cache.Get(key)
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if ok {
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return cached.(*core.File), nil
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}
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file, err := s.service.Find(ctx, user, repo, commit, ref, path)
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if err != nil {
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return nil, err
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}
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s.cache.Add(key, file)
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return file, nil
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}
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