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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
)
type LazyLoadCache struct {
// InMemoryLRUCachePartition containing other InMemoryLRUCachePartitions
// with the actual cached members
userCaches *InMemoryLRUCachePartition
}
// NewLazyLoadCache creates a new LazyLoadCache.
func NewLazyLoadCache() (*LazyLoadCache, error) {
cache, err := NewInMemoryLRUCachePartition(
LazyLoadCacheName,
LazyLoadCacheMutable,
LazyLoadCacheMaxEntries,
LazyLoadCacheMaxAge,
true,
)
if err != nil {
return nil, err
}
go cacheCleaner(cache)
return &LazyLoadCache{
userCaches: cache,
}, nil
}
func (c *LazyLoadCache) lazyLoadCacheForUser(device *userapi.Device) (*InMemoryLRUCachePartition, error) {
cacheName := fmt.Sprintf("%s/%s", device.UserID, device.ID)
userCache, ok := c.userCaches.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
}
c.userCaches.Set(cacheName, cache)
go cacheCleaner(cache)
return cache, nil
}
func (c *LazyLoadCache) 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)
}
func (c *LazyLoadCache) 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
}
|
