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dendrite/internal/caching/cache_lazy_load_members.go

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package caching
import (
"fmt"
"time"
userapi "github.com/matrix-org/dendrite/userapi/api"
)
const (
LazyLoadCacheName = "lazy_load_members"
LazyLoadCacheMaxEntries = 128
LazyLoadCacheMaxUserEntries = 128
LazyLoadCacheMutable = true
LazyLoadCacheMaxAge = time.Minute * 30
)
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type LazyLoadCache interface {
StoreLazyLoadedUser(device *userapi.Device, roomID, userID, eventID string)
IsLazyLoadedUserCached(device *userapi.Device, roomID, userID string) (string, bool)
}
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func (c Caches) lazyLoadCacheForUser(device *userapi.Device) (*InMemoryLRUCachePartition, error) {
cacheName := fmt.Sprintf("%s/%s", device.UserID, device.ID)
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userCache, ok := c.LazyLoading.Get(cacheName)
if ok && userCache != nil {
if cache, ok := userCache.(*InMemoryLRUCachePartition); ok {
return cache, nil
}
}
cache, err := NewInMemoryLRUCachePartition(
LazyLoadCacheName,
LazyLoadCacheMutable,
LazyLoadCacheMaxUserEntries,
LazyLoadCacheMaxAge,
false,
)
if err != nil {
return nil, err
}
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c.LazyLoading.Set(cacheName, cache)
go cacheCleaner(cache)
return cache, nil
}
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func (c Caches) StoreLazyLoadedUser(device *userapi.Device, roomID, userID, eventID string) {
cache, err := c.lazyLoadCacheForUser(device)
if err != nil {
return
}
cacheKey := fmt.Sprintf("%s/%s/%s/%s", device.UserID, device.ID, roomID, userID)
cache.Set(cacheKey, eventID)
}
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func (c Caches) IsLazyLoadedUserCached(device *userapi.Device, roomID, userID string) (string, bool) {
cache, err := c.lazyLoadCacheForUser(device)
if err != nil {
return "", false
}
cacheKey := fmt.Sprintf("%s/%s/%s/%s", device.UserID, device.ID, roomID, userID)
val, ok := cache.Get(cacheKey)
if !ok {
return "", ok
}
return val.(string), ok
}