mirror of
https://github.com/go-gitea/gitea.git
synced 2025-10-29 18:44:46 +01:00
a2651c14ce
This adds a cache for common package queries in `GetPackageDescriptor`. Code which needs to process a list of packages benefits from this change. This skips 350 queries in the package integration tests for example. --------- Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
91 lines
2.1 KiB
Go
91 lines
2.1 KiB
Go
// Copyright 2025 The Gitea Authors. All rights reserved.
|
|
// SPDX-License-Identifier: MIT
|
|
|
|
package cache
|
|
|
|
import (
|
|
"context"
|
|
"sync"
|
|
"time"
|
|
|
|
"code.gitea.io/gitea/modules/log"
|
|
"code.gitea.io/gitea/modules/util"
|
|
)
|
|
|
|
// EphemeralCache is a cache that can be used to store data in a request level context
|
|
// This is useful for caching data that is expensive to calculate and is likely to be
|
|
// used multiple times in a request.
|
|
type EphemeralCache struct {
|
|
data map[any]map[any]any
|
|
lock sync.RWMutex
|
|
created time.Time
|
|
checkLifeTime time.Duration
|
|
}
|
|
|
|
var timeNow = time.Now
|
|
|
|
func NewEphemeralCache(checkLifeTime ...time.Duration) *EphemeralCache {
|
|
return &EphemeralCache{
|
|
data: make(map[any]map[any]any),
|
|
created: timeNow(),
|
|
checkLifeTime: util.OptionalArg(checkLifeTime, 0),
|
|
}
|
|
}
|
|
|
|
func (cc *EphemeralCache) checkExceededLifeTime(tp, key any) bool {
|
|
if cc.checkLifeTime > 0 && timeNow().Sub(cc.created) > cc.checkLifeTime {
|
|
log.Warn("EphemeralCache is expired, is highly likely to be abused for long-life tasks: %v, %v", tp, key)
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
func (cc *EphemeralCache) Get(tp, key any) (any, bool) {
|
|
if cc.checkExceededLifeTime(tp, key) {
|
|
return nil, false
|
|
}
|
|
cc.lock.RLock()
|
|
defer cc.lock.RUnlock()
|
|
ret, ok := cc.data[tp][key]
|
|
return ret, ok
|
|
}
|
|
|
|
func (cc *EphemeralCache) Put(tp, key, value any) {
|
|
if cc.checkExceededLifeTime(tp, key) {
|
|
return
|
|
}
|
|
|
|
cc.lock.Lock()
|
|
defer cc.lock.Unlock()
|
|
|
|
d := cc.data[tp]
|
|
if d == nil {
|
|
d = make(map[any]any)
|
|
cc.data[tp] = d
|
|
}
|
|
d[key] = value
|
|
}
|
|
|
|
func (cc *EphemeralCache) Delete(tp, key any) {
|
|
if cc.checkExceededLifeTime(tp, key) {
|
|
return
|
|
}
|
|
|
|
cc.lock.Lock()
|
|
defer cc.lock.Unlock()
|
|
delete(cc.data[tp], key)
|
|
}
|
|
|
|
func GetWithEphemeralCache[T, K any](ctx context.Context, c *EphemeralCache, groupKey string, targetKey K, f func(context.Context, K) (T, error)) (T, error) {
|
|
v, has := c.Get(groupKey, targetKey)
|
|
if vv, ok := v.(T); has && ok {
|
|
return vv, nil
|
|
}
|
|
t, err := f(ctx, targetKey)
|
|
if err != nil {
|
|
return t, err
|
|
}
|
|
c.Put(groupKey, targetKey, t)
|
|
return t, nil
|
|
}
|