gotosocial/internal/cache/cache.go

207 lines
6.5 KiB
Go

// GoToSocial
// Copyright (C) GoToSocial Authors admin@gotosocial.org
// SPDX-License-Identifier: AGPL-3.0-or-later
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package cache
import (
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/log"
)
type Caches struct {
// GTS provides access to the collection of gtsmodel object caches.
// (used by the database).
GTS GTSCaches
// AP provides access to the collection of ActivityPub object caches.
// (planned to be used by the typeconverter).
AP APCaches
// Visibility provides access to the item visibility cache.
// (used by the visibility filter).
Visibility VisibilityCache
// prevent pass-by-value.
_ nocopy
}
// Init will (re)initialize both the GTS and AP cache collections.
// NOTE: the cache MUST NOT be in use anywhere, this is not thread-safe.
func (c *Caches) Init() {
log.Infof(nil, "init: %p", c)
c.GTS.Init()
c.AP.Init()
c.Visibility.Init()
// Setup cache invalidate hooks.
// !! READ THE METHOD COMMENT
c.setuphooks()
}
// Start will start both the GTS and AP cache collections.
func (c *Caches) Start() {
log.Infof(nil, "start: %p", c)
c.GTS.Start()
c.AP.Start()
c.Visibility.Start()
}
// Stop will stop both the GTS and AP cache collections.
func (c *Caches) Stop() {
log.Infof(nil, "stop: %p", c)
c.GTS.Stop()
c.AP.Stop()
c.Visibility.Stop()
}
// setuphooks sets necessary cache invalidation hooks between caches,
// as an invalidation indicates a database INSERT / UPDATE / DELETE.
// NOTE THEY ARE ONLY CALLED WHEN THE ITEM IS IN THE CACHE, SO FOR
// HOOKS TO BE CALLED ON DELETE YOU MUST FIRST POPULATE IT IN THE CACHE.
func (c *Caches) setuphooks() {
c.GTS.Account().SetInvalidateCallback(func(account *gtsmodel.Account) {
// Invalidate account ID cached visibility.
c.Visibility.Invalidate("ItemID", account.ID)
c.Visibility.Invalidate("RequesterID", account.ID)
// Invalidate this account's
// following / follower lists.
// (see FollowIDs() comment for details).
c.GTS.FollowIDs().InvalidateAll(
">"+account.ID,
"l>"+account.ID,
"<"+account.ID,
"l<"+account.ID,
)
// Invalidate this account's
// follow requesting / request lists.
// (see FollowRequestIDs() comment for details).
c.GTS.FollowRequestIDs().InvalidateAll(
">"+account.ID,
"<"+account.ID,
)
// Invalidate this account's block lists.
c.GTS.BlockIDs().Invalidate(account.ID)
})
c.GTS.Block().SetInvalidateCallback(func(block *gtsmodel.Block) {
// Invalidate block origin account ID cached visibility.
c.Visibility.Invalidate("ItemID", block.AccountID)
c.Visibility.Invalidate("RequesterID", block.AccountID)
// Invalidate block target account ID cached visibility.
c.Visibility.Invalidate("ItemID", block.TargetAccountID)
c.Visibility.Invalidate("RequesterID", block.TargetAccountID)
// Invalidate source account's block lists.
c.GTS.BlockIDs().Invalidate(block.AccountID)
})
c.GTS.EmojiCategory().SetInvalidateCallback(func(category *gtsmodel.EmojiCategory) {
// Invalidate any emoji in this category.
c.GTS.Emoji().Invalidate("CategoryID", category.ID)
})
c.GTS.Follow().SetInvalidateCallback(func(follow *gtsmodel.Follow) {
// Invalidate follow request with this same ID.
c.GTS.FollowRequest().Invalidate("ID", follow.ID)
// Invalidate any related list entries.
c.GTS.ListEntry().Invalidate("FollowID", follow.ID)
// Invalidate follow origin account ID cached visibility.
c.Visibility.Invalidate("ItemID", follow.AccountID)
c.Visibility.Invalidate("RequesterID", follow.AccountID)
// Invalidate follow target account ID cached visibility.
c.Visibility.Invalidate("ItemID", follow.TargetAccountID)
c.Visibility.Invalidate("RequesterID", follow.TargetAccountID)
// Invalidate source account's following
// lists, and destination's follwer lists.
// (see FollowIDs() comment for details).
c.GTS.FollowIDs().InvalidateAll(
">"+follow.AccountID,
"l>"+follow.AccountID,
"<"+follow.AccountID,
"l<"+follow.AccountID,
"<"+follow.TargetAccountID,
"l<"+follow.TargetAccountID,
">"+follow.TargetAccountID,
"l>"+follow.TargetAccountID,
)
})
c.GTS.FollowRequest().SetInvalidateCallback(func(followReq *gtsmodel.FollowRequest) {
// Invalidate follow with this same ID.
c.GTS.Follow().Invalidate("ID", followReq.ID)
// Invalidate source account's followreq
// lists, and destinations follow req lists.
// (see FollowRequestIDs() comment for details).
c.GTS.FollowRequestIDs().InvalidateAll(
">"+followReq.AccountID,
"<"+followReq.AccountID,
">"+followReq.TargetAccountID,
"<"+followReq.TargetAccountID,
)
})
c.GTS.List().SetInvalidateCallback(func(list *gtsmodel.List) {
// Invalidate all cached entries of this list.
c.GTS.ListEntry().Invalidate("ListID", list.ID)
})
c.GTS.Media().SetInvalidateCallback(func(media *gtsmodel.MediaAttachment) {
if *media.Avatar || *media.Header {
// Invalidate cache of attaching account.
c.GTS.Account().Invalidate("ID", media.AccountID)
}
if media.StatusID != "" {
// Invalidate cache of attaching status.
c.GTS.Status().Invalidate("ID", media.StatusID)
}
})
c.GTS.Status().SetInvalidateCallback(func(status *gtsmodel.Status) {
// Invalidate status ID cached visibility.
c.Visibility.Invalidate("ItemID", status.ID)
for _, id := range status.AttachmentIDs {
// Invalidate each media by the IDs we're aware of.
// This must be done as the status table is aware of
// the media IDs in use before the media table is
// aware of the status ID they are linked to.
//
// c.GTS.Media().Invalidate("StatusID") will not work.
c.GTS.Media().Invalidate("ID", id)
}
})
c.GTS.User().SetInvalidateCallback(func(user *gtsmodel.User) {
// Invalidate local account ID cached visibility.
c.Visibility.Invalidate("ItemID", user.AccountID)
c.Visibility.Invalidate("RequesterID", user.AccountID)
})
}