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Lunny Xiao bd820aa9c5 Add context cache as a request level cache (#22294) ... To avoid duplicated load of the same data in an HTTP request, we can set a context cache to do that. i.e. Some pages may load a user from a database with the same id in different areas on the same page. But the code is hidden in two different deep logic. How should we share the user? As a result of this PR, now if both entry functions accept `context.Context` as the first parameter and we just need to refactor `GetUserByID` to reuse the user from the context cache. Then it will not be loaded twice on an HTTP request. But of course, sometimes we would like to reload an object from the database, that's why `RemoveContextData` is also exposed. The core context cache is here. It defines a new context ```go type cacheContext struct { ctx context.Context data map[any]map[any]any lock sync.RWMutex } var cacheContextKey = struct{}{} func WithCacheContext(ctx context.Context) context.Context { return context.WithValue(ctx, cacheContextKey, &cacheContext{ ctx: ctx, data: make(map[any]map[any]any), }) } ``` Then you can use the below 4 methods to read/write/del the data within the same context. ```go func GetContextData(ctx context.Context, tp, key any) any func SetContextData(ctx context.Context, tp, key, value any) func RemoveContextData(ctx context.Context, tp, key any) func GetWithContextCache[T any](ctx context.Context, cacheGroupKey string, cacheTargetID any, f func() (T, error)) (T, error) ``` Then let's take a look at how `system.GetString` implement it. ```go func GetSetting(ctx context.Context, key string) (string, error) { return cache.GetWithContextCache(ctx, contextCacheKey, key, func() (string, error) { return cache.GetString(genSettingCacheKey(key), func() (string, error) { res, err := GetSettingNoCache(ctx, key) if err != nil { return "", err } return res.SettingValue, nil }) }) } ``` First, it will check if context data include the setting object with the key. If not, it will query from the global cache which may be memory or a Redis cache. If not, it will get the object from the database. In the end, if the object gets from the global cache or database, it will be set into the context cache. An object stored in the context cache will only be destroyed after the context disappeared.		2 years ago
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actions	Move helpers to be prefixed with `gt-` (#22879)	2 years ago
branch	Move helpers to be prefixed with `gt-` (#22879)	2 years ago
cite	Copy citation file content, in APA and BibTex format, on repo home page (#19999)	2 years ago
diff	Add context cache as a request level cache (#22294)	2 years ago
editor	Add context cache as a request level cache (#22294)	2 years ago
find	Move helpers to be prefixed with `gt-` (#22879)	2 years ago
graph	Add context cache as a request level cache (#22294)	2 years ago
issue	Add context cache as a request level cache (#22294)	2 years ago
migrate	Add context cache as a request level cache (#22294)	2 years ago
projects	Add context cache as a request level cache (#22294)	2 years ago
pulls	Add context cache as a request level cache (#22294)	2 years ago
release	Add context cache as a request level cache (#22294)	2 years ago
settings	Add context cache as a request level cache (#22294)	2 years ago
wiki	Move helpers to be prefixed with `gt-` (#22879)	2 years ago
activity.tmpl	Add main landmark to templates and adjust titles (#22670)	2 years ago
blame.tmpl	Move helpers to be prefixed with `gt-` (#22879)	2 years ago
branch_dropdown.tmpl	Move helpers to be prefixed with `gt-` (#22879)	2 years ago
clone_buttons.tmpl	Move helpers to be prefixed with `gt-` (#22879)	2 years ago
clone_script.tmpl	Make clone URL use current page's host (#22808)	2 years ago
commit_page.tmpl	Add context cache as a request level cache (#22294)	2 years ago
commit_status.tmpl	Change commit status icons to SVG (#20736)	2 years ago
commit_statuses.tmpl	Move helpers to be prefixed with `gt-` (#22879)	2 years ago
commits.tmpl	Move helpers to be prefixed with `gt-` (#22879)	2 years ago
commits_list.tmpl	Add context cache as a request level cache (#22294)	2 years ago
commits_list_small.tmpl	Add context cache as a request level cache (#22294)	2 years ago
commits_table.tmpl	Move helpers to be prefixed with `gt-` (#22879)	2 years ago
create.tmpl	Add context cache as a request level cache (#22294)	2 years ago
create_helper.tmpl	Add templates to customize text when creating and migrating repositories	2 years ago
empty.tmpl	Add main landmark to templates and adjust titles (#22670)	2 years ago
file_info.tmpl	Move helpers to be prefixed with `gt-` (#22879)	2 years ago
forks.tmpl	Add context cache as a request level cache (#22294)	2 years ago
graph.tmpl	Move helpers to be prefixed with `gt-` (#22879)	2 years ago
header.tmpl	Move helpers to be prefixed with `gt-` (#22879)	2 years ago
home.tmpl	Move helpers to be prefixed with `gt-` (#22879)	2 years ago
icon.tmpl	Move helpers to be prefixed with `gt-` (#22879)	2 years ago
packages.tmpl	Add main landmark to templates and adjust titles (#22670)	2 years ago
search.tmpl	Remove Fomantic-UI's `.hidden` CSS class for menu elements (#22895)	2 years ago
shabox_badge.tmpl	Add context cache as a request level cache (#22294)	2 years ago
sub_menu.tmpl	Move helpers to be prefixed with `gt-` (#22879)	2 years ago
unicode_escape_prompt.tmpl	Move helpers to be prefixed with `gt-` (#22879)	2 years ago
upload.tmpl	Refactor `i18n` to `locale` (#20153)	2 years ago
user_cards.tmpl	Add context cache as a request level cache (#22294)	2 years ago
view_file.tmpl	Move helpers to be prefixed with `gt-` (#22879)	2 years ago
view_list.tmpl	Add context cache as a request level cache (#22294)	2 years ago
watchers.tmpl	Add main landmark to templates and adjust titles (#22670)	2 years ago