xfy
2caca3a48d
- settings.rs: retention 常量与 clamp_retention 仅服务端使用，加 #[cfg(feature = "server")] - comment.rs: 删除未使用的 Comment 结构体 - cache.rs: 删除未使用的 invalidate_all_comment_caches 及其测试 验证: cargo check (server/wasm), cargo test (311 passed), dx check, cargo clippy
608 lines
18 KiB
Rust
608 lines
18 KiB
Rust
//! 基于 moka 的内存缓存层。
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//!
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//! 仅在启用 `server` feature 时编译，为文章列表、标签、单篇文章、统计信息
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//! 以及评论相关数据提供按键缓存与失效能力。
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//! 缓存使用 `std::sync::LazyLock` 全局实例，按不同业务数据设置独立的 TTL。
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#[cfg(feature = "server")]
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use moka::future::Cache;
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#[cfg(feature = "server")]
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use std::sync::LazyLock;
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#[cfg(feature = "server")]
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use std::time::Duration;
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#[cfg(feature = "server")]
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use crate::models::comment::PublicComment;
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#[cfg(feature = "server")]
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use crate::models::post::{Post, PostStats, Tag};
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// ============================================================================
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// 缓存 TTL 配置
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// ============================================================================
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/// 文章列表缓存 TTL：60 秒。
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#[cfg(feature = "server")]
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const TTL_POST_LIST: Duration = Duration::from_secs(60);
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/// 标签列表缓存 TTL：300 秒。
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#[cfg(feature = "server")]
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const TTL_TAG_LIST: Duration = Duration::from_secs(300);
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/// 单篇文章缓存 TTL：600 秒。
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#[cfg(feature = "server")]
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const TTL_SINGLE_POST: Duration = Duration::from_secs(600);
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/// 文章统计缓存 TTL：60 秒。
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#[cfg(feature = "server")]
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const TTL_POST_STATS: Duration = Duration::from_secs(60);
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/// 标签下文章列表缓存 TTL：120 秒。
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#[cfg(feature = "server")]
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const TTL_TAG_POSTS: Duration = Duration::from_secs(120);
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/// 评论列表缓存 TTL：60 秒。
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#[cfg(feature = "server")]
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const TTL_COMMENTS: Duration = Duration::from_secs(60);
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/// 评论数量缓存 TTL：60 秒。
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#[cfg(feature = "server")]
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const TTL_COMMENT_COUNT: Duration = Duration::from_secs(60);
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/// 待审核评论数量缓存 TTL：10 秒，因管理后台需要较实时数据。
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#[cfg(feature = "server")]
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const TTL_PENDING_COUNT: Duration = Duration::from_secs(10);
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// ============================================================================
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// 缓存 Key 类型
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// ============================================================================
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/// 统一的缓存键枚举，每个变体对应一类可缓存数据。
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#[cfg(feature = "server")]
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#[derive(Debug, Clone, Hash, Eq, PartialEq)]
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pub enum CacheKey {
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/// 已发布文章分页列表。
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PublishedPosts { page: i32, per_page: i32 },
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/// 已发布文章总数。
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TotalPublishedPosts,
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/// 全部标签。
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AllTags,
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/// 按 slug 查询的单篇文章。
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PostBySlug(String),
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/// 按标签查询的文章列表。
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PostsByTag(String),
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/// 文章统计信息。
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PostStats,
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/// 某篇文章下的评论列表。
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CommentsByPost { post_id: i32 },
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/// 某篇文章的评论数量。
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CommentCount { post_id: i32 },
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/// 待审核评论总数。
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PendingCommentCount,
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}
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// ============================================================================
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// 缓存实例
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// ============================================================================
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/// 文章列表缓存类型，值为（文章列表，总数）。
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#[cfg(feature = "server")]
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pub type PostListCache = Cache<CacheKey, (Vec<Post>, i64)>;
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/// 标签列表缓存类型。
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#[cfg(feature = "server")]
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pub type TagListCache = Cache<CacheKey, Vec<Tag>>;
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/// 单篇文章缓存类型。
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#[cfg(feature = "server")]
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pub type SinglePostCache = Cache<CacheKey, Option<Post>>;
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/// 文章统计缓存类型。
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#[cfg(feature = "server")]
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pub type PostStatsCache = Cache<CacheKey, PostStats>;
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/// 全局文章列表缓存实例，最大容量 100。
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#[cfg(feature = "server")]
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static POST_LIST_CACHE: LazyLock<PostListCache> = LazyLock::new(|| {
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Cache::builder()
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.max_capacity(100)
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.time_to_live(TTL_POST_LIST)
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.build()
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});
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/// 全局标签列表缓存实例，最大容量 50。
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#[cfg(feature = "server")]
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static TAG_LIST_CACHE: LazyLock<TagListCache> = LazyLock::new(|| {
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Cache::builder()
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.max_capacity(50)
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.time_to_live(TTL_TAG_LIST)
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.build()
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});
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/// 全局单篇文章缓存实例，最大容量 200。
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#[cfg(feature = "server")]
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static SINGLE_POST_CACHE: LazyLock<SinglePostCache> = LazyLock::new(|| {
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Cache::builder()
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.max_capacity(200)
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.time_to_live(TTL_SINGLE_POST)
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.build()
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});
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/// 全局文章统计缓存实例，最大容量 10。
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#[cfg(feature = "server")]
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static POST_STATS_CACHE: LazyLock<PostStatsCache> = LazyLock::new(|| {
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Cache::builder()
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.max_capacity(10)
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.time_to_live(TTL_POST_STATS)
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.build()
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});
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/// 全局标签文章列表缓存实例，最大容量 100。
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#[cfg(feature = "server")]
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static TAG_POSTS_CACHE: LazyLock<PostListCache> = LazyLock::new(|| {
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Cache::builder()
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.max_capacity(100)
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.time_to_live(TTL_TAG_POSTS)
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.build()
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});
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/// 评论列表缓存类型。
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#[cfg(feature = "server")]
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pub type CommentListCache = Cache<CacheKey, Vec<PublicComment>>;
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/// 评论数量缓存类型。
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#[cfg(feature = "server")]
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pub type CommentCountCache = Cache<CacheKey, i64>;
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/// 全局评论列表缓存实例，最大容量 200。
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#[cfg(feature = "server")]
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static COMMENT_CACHE: LazyLock<CommentListCache> = LazyLock::new(|| {
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Cache::builder()
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.max_capacity(200)
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.time_to_live(TTL_COMMENTS)
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.build()
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});
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/// 全局评论数量缓存实例，最大容量 200。
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#[cfg(feature = "server")]
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static COMMENT_COUNT_CACHE: LazyLock<CommentCountCache> = LazyLock::new(|| {
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Cache::builder()
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.max_capacity(200)
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.time_to_live(TTL_COMMENT_COUNT)
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.build()
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});
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/// 全局待审核评论数量缓存实例，最大容量 10。
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#[cfg(feature = "server")]
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static PENDING_COUNT_CACHE: LazyLock<CommentCountCache> = LazyLock::new(|| {
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Cache::builder()
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.max_capacity(10)
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.time_to_live(TTL_PENDING_COUNT)
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.build()
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});
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// ============================================================================
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// 公共缓存 API
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// ============================================================================
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/// 读取文章分页列表缓存。
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#[cfg(feature = "server")]
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pub async fn get_post_list(key: &CacheKey) -> Option<(Vec<Post>, i64)> {
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POST_LIST_CACHE.get(key).await
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}
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/// 写入文章分页列表缓存。
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#[cfg(feature = "server")]
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pub async fn set_post_list(key: &CacheKey, posts: Vec<Post>, total: i64) {
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let _ = POST_LIST_CACHE.insert(key.clone(), (posts, total)).await;
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}
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/// 读取已发布文章总数缓存。
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#[cfg(feature = "server")]
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pub async fn get_total_published_posts() -> Option<i64> {
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POST_LIST_CACHE
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.get(&CacheKey::TotalPublishedPosts)
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.await
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.map(|(_, total)| total)
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}
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/// 写入已发布文章总数缓存，文章列表部分置空以节省内存。
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#[cfg(feature = "server")]
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pub async fn set_total_published_posts(total: i64) {
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let _ = POST_LIST_CACHE
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.insert(CacheKey::TotalPublishedPosts, (vec![], total))
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.await;
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}
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/// 读取全部标签缓存。
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#[cfg(feature = "server")]
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pub async fn get_tag_list() -> Option<Vec<Tag>> {
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TAG_LIST_CACHE.get(&CacheKey::AllTags).await
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}
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/// 写入全部标签缓存。
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#[cfg(feature = "server")]
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pub async fn set_tag_list(tags: Vec<Tag>) {
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let _ = TAG_LIST_CACHE.insert(CacheKey::AllTags, tags).await;
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}
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/// 按 slug 读取单篇文章缓存。
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#[cfg(feature = "server")]
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pub async fn get_post_by_slug(slug: &str) -> Option<Option<Post>> {
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SINGLE_POST_CACHE
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.get(&CacheKey::PostBySlug(slug.to_string()))
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.await
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}
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/// 按 slug 写入单篇文章缓存，None 表示文章不存在。
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#[cfg(feature = "server")]
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pub async fn set_post_by_slug(slug: &str, post: Option<Post>) {
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let _ = SINGLE_POST_CACHE
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.insert(CacheKey::PostBySlug(slug.to_string()), post)
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.await;
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}
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/// 按标签读取文章列表缓存。
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#[cfg(feature = "server")]
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pub async fn get_posts_by_tag(tag: &str) -> Option<(Vec<Post>, i64)> {
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TAG_POSTS_CACHE
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.get(&CacheKey::PostsByTag(tag.to_string()))
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.await
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}
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/// 按标签写入文章列表缓存。
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#[cfg(feature = "server")]
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pub async fn set_posts_by_tag(tag: &str, posts: Vec<Post>, total: i64) {
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let _ = TAG_POSTS_CACHE
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.insert(CacheKey::PostsByTag(tag.to_string()), (posts, total))
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.await;
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}
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/// 读取文章统计缓存。
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#[cfg(feature = "server")]
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pub async fn get_post_stats() -> Option<PostStats> {
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POST_STATS_CACHE.get(&CacheKey::PostStats).await
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}
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/// 写入文章统计缓存。
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#[cfg(feature = "server")]
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pub async fn set_post_stats(stats: PostStats) {
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let _ = POST_STATS_CACHE.insert(CacheKey::PostStats, stats).await;
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}
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// ============================================================================
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// 缓存失效
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// ============================================================================
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/// 清空所有文章分页列表缓存。
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#[cfg(feature = "server")]
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pub fn invalidate_post_lists() {
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POST_LIST_CACHE.invalidate_all();
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}
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/// 清空所有标签缓存。
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#[cfg(feature = "server")]
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pub fn invalidate_all_tags() {
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TAG_LIST_CACHE.invalidate_all();
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}
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/// 按 slug 失效单篇文章缓存。
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#[cfg(feature = "server")]
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pub async fn invalidate_post_by_slug(slug: &str) {
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SINGLE_POST_CACHE
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.invalidate(&CacheKey::PostBySlug(slug.to_string()))
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.await;
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}
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/// 按标签失效文章列表缓存。
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#[cfg(feature = "server")]
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pub async fn invalidate_posts_by_tag(tag: &str) {
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TAG_POSTS_CACHE
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.invalidate(&CacheKey::PostsByTag(tag.to_string()))
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.await;
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}
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/// 清空文章统计缓存。
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#[cfg(feature = "server")]
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pub fn invalidate_post_stats() {
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POST_STATS_CACHE.invalidate_all();
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}
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/// 清空所有文章相关缓存（列表、标签、单篇、统计、标签文章）。
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#[cfg(feature = "server")]
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pub fn invalidate_all_post_caches() {
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POST_LIST_CACHE.invalidate_all();
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TAG_LIST_CACHE.invalidate_all();
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SINGLE_POST_CACHE.invalidate_all();
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POST_STATS_CACHE.invalidate_all();
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TAG_POSTS_CACHE.invalidate_all();
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}
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/// 按文章主键读取评论列表缓存。
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#[cfg(feature = "server")]
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pub async fn get_comments_by_post(post_id: i32) -> Option<Vec<PublicComment>> {
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COMMENT_CACHE
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.get(&CacheKey::CommentsByPost { post_id })
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.await
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}
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/// 按文章主键写入评论列表缓存。
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#[cfg(feature = "server")]
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pub async fn set_comments_by_post(post_id: i32, comments: Vec<PublicComment>) {
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let _ = COMMENT_CACHE
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.insert(CacheKey::CommentsByPost { post_id }, comments)
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.await;
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}
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/// 按文章主键读取评论数量缓存。
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#[cfg(feature = "server")]
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pub async fn get_comment_count(post_id: i32) -> Option<i64> {
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COMMENT_COUNT_CACHE
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.get(&CacheKey::CommentCount { post_id })
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.await
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}
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/// 按文章主键写入评论数量缓存。
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#[cfg(feature = "server")]
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pub async fn set_comment_count(post_id: i32, count: i64) {
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let _ = COMMENT_COUNT_CACHE
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.insert(CacheKey::CommentCount { post_id }, count)
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.await;
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}
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/// 读取待审核评论总数缓存。
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#[cfg(feature = "server")]
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pub async fn get_pending_count() -> Option<i64> {
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PENDING_COUNT_CACHE
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.get(&CacheKey::PendingCommentCount)
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.await
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}
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/// 写入待审核评论总数缓存。
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#[cfg(feature = "server")]
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pub async fn set_pending_count(count: i64) {
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let _ = PENDING_COUNT_CACHE
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.insert(CacheKey::PendingCommentCount, count)
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.await;
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}
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/// 按文章主键失效评论列表缓存。
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#[cfg(feature = "server")]
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pub async fn invalidate_comments_by_post(post_id: i32) {
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COMMENT_CACHE
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.invalidate(&CacheKey::CommentsByPost { post_id })
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.await;
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}
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/// 按文章主键失效评论数量缓存。
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#[cfg(feature = "server")]
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pub async fn invalidate_comment_count(post_id: i32) {
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COMMENT_COUNT_CACHE
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.invalidate(&CacheKey::CommentCount { post_id })
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.await;
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}
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/// 失效待审核评论总数缓存。
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#[cfg(feature = "server")]
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pub async fn invalidate_pending_count() {
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PENDING_COUNT_CACHE
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.invalidate(&CacheKey::PendingCommentCount)
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.await;
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}
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#[cfg(all(test, feature = "server"))]
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mod tests {
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use super::*;
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use crate::models::comment::PublicComment;
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use crate::models::post::PostStatus;
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use serial_test::serial;
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#[test]
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#[serial]
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fn cache_key_equality() {
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let k1 = CacheKey::PublishedPosts {
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page: 1,
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per_page: 10,
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};
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let k2 = CacheKey::PublishedPosts {
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page: 1,
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per_page: 10,
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};
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let k3 = CacheKey::PublishedPosts {
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page: 2,
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per_page: 10,
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};
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assert_eq!(k1, k2);
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assert_ne!(k1, k3);
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}
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#[tokio::test]
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#[serial]
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async fn post_list_cache_roundtrip() {
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let key = CacheKey::PublishedPosts {
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page: 999,
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per_page: 99,
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};
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let posts = vec![];
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set_post_list(&key, posts.clone(), 0).await;
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let cached = get_post_list(&key).await;
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assert!(cached.is_some());
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let (cached_posts, cached_total) = cached.unwrap();
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assert_eq!(cached_posts.len(), 0);
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assert_eq!(cached_total, 0);
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}
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#[tokio::test]
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#[serial]
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async fn tag_list_cache_roundtrip() {
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let tags = vec![Tag {
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id: 1,
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name: "rust".to_string(),
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post_count: 5,
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}];
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set_tag_list(tags.clone()).await;
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let cached = get_tag_list().await;
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assert!(cached.is_some());
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assert_eq!(cached.unwrap()[0].name, "rust");
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}
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#[tokio::test]
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#[serial]
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async fn single_post_cache_roundtrip() {
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let post = Some(Post {
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id: 1,
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author_id: 1,
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title: "Test".to_string(),
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slug: "test".to_string(),
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summary: None,
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content_md: "content".to_string(),
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content_html: None,
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status: PostStatus::Published,
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published_at: None,
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created_at: chrono::Utc::now(),
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updated_at: chrono::Utc::now(),
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deleted_at: None,
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||
tags: vec![],
|
||
cover_image: None,
|
||
reading_time: 1,
|
||
word_count: 10,
|
||
toc_html: None,
|
||
prev_post: None,
|
||
next_post: None,
|
||
});
|
||
|
||
set_post_by_slug("test", post.clone()).await;
|
||
let cached = get_post_by_slug("test").await;
|
||
|
||
assert!(cached.is_some());
|
||
assert_eq!(cached.unwrap().unwrap().title, "Test");
|
||
}
|
||
|
||
#[tokio::test]
|
||
#[serial]
|
||
async fn post_stats_cache_roundtrip() {
|
||
let stats = PostStats {
|
||
total: 10,
|
||
drafts: 3,
|
||
published: 7,
|
||
};
|
||
|
||
set_post_stats(stats.clone()).await;
|
||
let cached = get_post_stats().await;
|
||
|
||
assert!(cached.is_some());
|
||
assert_eq!(cached.unwrap().total, 10);
|
||
}
|
||
|
||
#[tokio::test]
|
||
#[serial]
|
||
async fn cache_invalidation_works() {
|
||
let post = Some(Post {
|
||
id: 42,
|
||
author_id: 1,
|
||
title: "Invalidation Test".to_string(),
|
||
slug: "invalidation-test".to_string(),
|
||
summary: None,
|
||
content_md: "test".to_string(),
|
||
content_html: None,
|
||
status: PostStatus::Published,
|
||
published_at: None,
|
||
created_at: chrono::Utc::now(),
|
||
updated_at: chrono::Utc::now(),
|
||
deleted_at: None,
|
||
tags: vec![],
|
||
cover_image: None,
|
||
reading_time: 1,
|
||
word_count: 4,
|
||
toc_html: None,
|
||
prev_post: None,
|
||
next_post: None,
|
||
});
|
||
|
||
set_post_by_slug("invalidation-test", post.clone()).await;
|
||
let cached_before = get_post_by_slug("invalidation-test").await;
|
||
assert!(cached_before.is_some());
|
||
|
||
invalidate_post_by_slug("invalidation-test").await;
|
||
|
||
let cached_after = get_post_by_slug("invalidation-test").await;
|
||
assert!(cached_after.is_none());
|
||
}
|
||
|
||
#[tokio::test]
|
||
#[serial]
|
||
async fn comment_cache_roundtrip() {
|
||
let comments = vec![PublicComment {
|
||
id: 1,
|
||
parent_id: None,
|
||
depth: 0,
|
||
author_name: "Alice".to_string(),
|
||
author_url: None,
|
||
avatar_url: "https://example.com/avatar".to_string(),
|
||
content_html: Some("<p>Hello</p>".to_string()),
|
||
created_at: "刚刚".to_string(),
|
||
created_at_iso: "2026-01-01T00:00:00Z".to_string(),
|
||
}];
|
||
|
||
set_comments_by_post(42, comments.clone()).await;
|
||
let cached = get_comments_by_post(42).await;
|
||
|
||
assert!(cached.is_some());
|
||
assert_eq!(cached.unwrap().len(), 1);
|
||
}
|
||
|
||
#[tokio::test]
|
||
#[serial]
|
||
async fn comment_count_cache_roundtrip() {
|
||
set_comment_count(42, 15).await;
|
||
let cached = get_comment_count(42).await;
|
||
|
||
assert!(cached.is_some());
|
||
assert_eq!(cached.unwrap(), 15);
|
||
}
|
||
|
||
#[tokio::test]
|
||
#[serial]
|
||
async fn pending_count_cache_roundtrip() {
|
||
set_pending_count(7).await;
|
||
let cached = get_pending_count().await;
|
||
|
||
assert!(cached.is_some());
|
||
assert_eq!(cached.unwrap(), 7);
|
||
}
|
||
|
||
#[tokio::test]
|
||
#[serial]
|
||
async fn comment_cache_invalidation() {
|
||
set_comments_by_post(99, vec![]).await;
|
||
assert!(get_comments_by_post(99).await.is_some());
|
||
|
||
invalidate_comments_by_post(99).await;
|
||
assert!(get_comments_by_post(99).await.is_none());
|
||
}
|
||
|
||
#[tokio::test]
|
||
#[serial]
|
||
async fn comment_count_invalidation() {
|
||
set_comment_count(99, 5).await;
|
||
assert!(get_comment_count(99).await.is_some());
|
||
|
||
invalidate_comment_count(99).await;
|
||
assert!(get_comment_count(99).await.is_none());
|
||
}
|
||
|
||
#[tokio::test]
|
||
#[serial]
|
||
async fn pending_count_invalidation() {
|
||
set_pending_count(3).await;
|
||
assert!(get_pending_count().await.is_some());
|
||
|
||
invalidate_pending_count().await;
|
||
assert!(get_pending_count().await.is_none());
|
||
}
|
||
|
||
}
|