e7cb8da2a8
Nowadays, cache will be used on almost everywhere of Gitea and it cannot be disabled, otherwise some features will become unaviable. Then I think we can just remove the option for cache enable. That means cache cannot be disabled. But of course, we can still use cache configuration to set how should Gitea use the cache.
116 lines
3.1 KiB
Go
116 lines
3.1 KiB
Go
// Copyright 2020 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package git
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import (
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"fmt"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/setting"
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"github.com/minio/sha256-simd"
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)
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// Cache represents a caching interface
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type Cache interface {
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// Put puts value into cache with key and expire time.
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Put(key string, val any, timeout int64) error
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// Get gets cached value by given key.
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Get(key string) any
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}
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func getCacheKey(repoPath, commitID, entryPath string) string {
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hashBytes := sha256.Sum256([]byte(fmt.Sprintf("%s:%s:%s", repoPath, commitID, entryPath)))
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return fmt.Sprintf("last_commit:%x", hashBytes)
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}
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// LastCommitCache represents a cache to store last commit
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type LastCommitCache struct {
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repoPath string
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ttl func() int64
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repo *Repository
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commitCache map[string]*Commit
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cache Cache
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}
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// NewLastCommitCache creates a new last commit cache for repo
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func NewLastCommitCache(count int64, repoPath string, gitRepo *Repository, cache Cache) *LastCommitCache {
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if cache == nil {
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return nil
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}
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if count < setting.CacheService.LastCommit.CommitsCount {
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return nil
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}
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return &LastCommitCache{
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repoPath: repoPath,
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repo: gitRepo,
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ttl: setting.LastCommitCacheTTLSeconds,
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cache: cache,
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}
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}
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// Put put the last commit id with commit and entry path
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func (c *LastCommitCache) Put(ref, entryPath, commitID string) error {
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if c == nil || c.cache == nil {
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return nil
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}
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log.Debug("LastCommitCache save: [%s:%s:%s]", ref, entryPath, commitID)
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return c.cache.Put(getCacheKey(c.repoPath, ref, entryPath), commitID, c.ttl())
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}
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// Get gets the last commit information by commit id and entry path
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func (c *LastCommitCache) Get(ref, entryPath string) (*Commit, error) {
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if c == nil || c.cache == nil {
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return nil, nil
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}
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commitID, ok := c.cache.Get(getCacheKey(c.repoPath, ref, entryPath)).(string)
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if !ok || commitID == "" {
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return nil, nil
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}
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log.Debug("LastCommitCache hit level 1: [%s:%s:%s]", ref, entryPath, commitID)
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if c.commitCache != nil {
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if commit, ok := c.commitCache[commitID]; ok {
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log.Debug("LastCommitCache hit level 2: [%s:%s:%s]", ref, entryPath, commitID)
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return commit, nil
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}
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}
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commit, err := c.repo.GetCommit(commitID)
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if err != nil {
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return nil, err
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}
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if c.commitCache == nil {
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c.commitCache = make(map[string]*Commit)
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}
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c.commitCache[commitID] = commit
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return commit, nil
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}
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// GetCommitByPath gets the last commit for the entry in the provided commit
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func (c *LastCommitCache) GetCommitByPath(commitID, entryPath string) (*Commit, error) {
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sha, err := NewIDFromString(commitID)
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if err != nil {
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return nil, err
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}
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lastCommit, err := c.Get(sha.String(), entryPath)
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if err != nil || lastCommit != nil {
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return lastCommit, err
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}
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lastCommit, err = c.repo.getCommitByPathWithID(sha, entryPath)
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if err != nil {
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return nil, err
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}
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if err := c.Put(commitID, entryPath, lastCommit.ID.String()); err != nil {
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log.Error("Unable to cache %s as the last commit for %q in %s %s. Error %v", lastCommit.ID.String(), entryPath, commitID, c.repoPath, err)
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}
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return lastCommit, nil
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}
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