add cache

b4tman/qchgk_web#1
using moka

Cargo.lock

@@ -210,6 +210,12 @@ version = "3.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0d261e256854913907f67ed06efbc3338dfe6179796deefc1ff763fc1aee5535"
 
+[[package]]
+name = "bytecount"
+version = "0.6.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2c676a478f63e9fa2dd5368a42f28bba0d6c560b775f38583c8bbaa7fcd67c9c"
+
 [[package]]
 name = "byteorder"
 version = "1.4.3"
@@ -237,6 +243,37 @@ dependencies = [
  "pkg-config",
 ]
 
+[[package]]
+name = "camino"
+version = "1.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c530edf18f37068ac2d977409ed5cd50d53d73bc653c7647b48eb78976ac9ae2"
+dependencies = [
+ "serde",
+]
+
+[[package]]
+name = "cargo-platform"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cbdb825da8a5df079a43676dbe042702f1707b1109f713a01420fbb4cc71fa27"
+dependencies = [
+ "serde",
+]
+
+[[package]]
+name = "cargo_metadata"
+version = "0.14.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4acbb09d9ee8e23699b9634375c72795d095bf268439da88562cf9b501f181fa"
+dependencies = [
+ "camino",
+ "cargo-platform",
+ "semver",
+ "serde",
+ "serde_json",
+]
+
 [[package]]
 name = "cc"
 version = "1.0.79"
@@ -370,6 +407,29 @@ dependencies = [
  "cfg-if 1.0.0",
 ]
 
+[[package]]
+name = "crossbeam-channel"
+version = "0.5.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cf2b3e8478797446514c91ef04bafcb59faba183e621ad488df88983cc14128c"
+dependencies = [
+ "cfg-if 1.0.0",
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-epoch"
+version = "0.9.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "46bd5f3f85273295a9d14aedfb86f6aadbff6d8f5295c4a9edb08e819dcf5695"
+dependencies = [
+ "autocfg",
+ "cfg-if 1.0.0",
+ "crossbeam-utils",
+ "memoffset",
+ "scopeguard",
+]
+
 [[package]]
 name = "crossbeam-utils"
 version = "0.8.15"
@@ -537,6 +597,27 @@ version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0bd4b30a6560bbd9b4620f4de34c3f14f60848e58a9b7216801afcb4c7b31c3c"
 
+[[package]]
+name = "errno"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50d6a0976c999d473fe89ad888d5a284e55366d9dc9038b1ba2aa15128c4afa0"
+dependencies = [
+ "errno-dragonfly",
+ "libc",
+ "windows-sys",
+]
+
+[[package]]
+name = "errno-dragonfly"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aa68f1b12764fab894d2755d2518754e71b4fd80ecfb822714a1206c2aab39bf"
+dependencies = [
+ "cc",
+ "libc",
+]
+
 [[package]]
 name = "error-chain"
 version = "0.12.4"
@@ -547,6 +628,15 @@ dependencies = [
  "version_check 0.9.4",
 ]
 
+[[package]]
+name = "fastrand"
+version = "1.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e51093e27b0797c359783294ca4f0a911c270184cb10f85783b118614a1501be"
+dependencies = [
+ "instant",
+]
+
 [[package]]
 name = "filetime"
 version = "0.2.20"
@@ -555,7 +645,7 @@ checksum = "8a3de6e8d11b22ff9edc6d916f890800597d60f8b2da1caf2955c274638d6412"
 dependencies = [
  "cfg-if 1.0.0",
  "libc",
- "redox_syscall",
+ "redox_syscall 0.2.16",
  "windows-sys",
 ]
 
@@ -689,6 +779,12 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "hermit-abi"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fed44880c466736ef9a5c5b5facefb5ed0785676d0c02d612db14e54f0d84286"
+
 [[package]]
 name = "hkdf"
 version = "0.10.0"
@@ -745,7 +841,7 @@ dependencies = [
  "time 0.1.45",
  "traitobject",
  "typeable",
- "unicase",
+ "unicase 1.4.2",
  "url",
 ]
 
@@ -814,6 +910,26 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "instant"
+version = "0.1.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a5bbe824c507c5da5956355e86a746d82e0e1464f65d862cc5e71da70e94b2c"
+dependencies = [
+ "cfg-if 1.0.0",
+]
+
+[[package]]
+name = "io-lifetimes"
+version = "1.0.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09270fd4fa1111bc614ed2246c7ef56239a3063d5be0d1ec3b589c505d400aeb"
+dependencies = [
+ "hermit-abi 0.3.1",
+ "libc",
+ "windows-sys",
+]
+
 [[package]]
 name = "iovec"
 version = "0.1.4"
@@ -939,6 +1055,12 @@ dependencies = [
  "cc",
 ]
 
+[[package]]
+name = "linux-raw-sys"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d59d8c75012853d2e872fb56bc8a2e53718e2cafe1a4c823143141c6d90c322f"
+
 [[package]]
 name = "lmdb-zero"
 version = "0.4.4"
@@ -951,6 +1073,16 @@ dependencies = [
  "supercow",
 ]
 
+[[package]]
+name = "lock_api"
+version = "0.4.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "435011366fe56583b16cf956f9df0095b405b82d76425bc8981c0e22e60ec4df"
+dependencies = [
+ "autocfg",
+ "scopeguard",
+]
+
 [[package]]
 name = "log"
 version = "0.3.9"
@@ -969,6 +1101,15 @@ dependencies = [
  "cfg-if 1.0.0",
 ]
 
+[[package]]
+name = "mach"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b823e83b2affd8f40a9ee8c29dbc56404c1e34cd2710921f2801e2cf29527afa"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "matches"
 version = "0.1.10"
@@ -991,6 +1132,15 @@ dependencies = [
  "winapi 0.3.9",
 ]
 
+[[package]]
+name = "memoffset"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d61c719bcfbcf5d62b3a09efa6088de8c54bc0bfcd3ea7ae39fcc186108b8de1"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "mime"
 version = "0.2.6"
@@ -1052,6 +1202,29 @@ dependencies = [
  "ws2_32-sys",
 ]
 
+[[package]]
+name = "moka"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1ccedbe530334b20d6f57b2ca9f7c54c7bd1072a5a0b0035970aafd53982bd8d"
+dependencies = [
+ "crossbeam-channel",
+ "crossbeam-epoch",
+ "crossbeam-utils",
+ "num_cpus",
+ "once_cell",
+ "parking_lot",
+ "quanta",
+ "rustc_version",
+ "scheduled-thread-pool",
+ "skeptic",
+ "smallvec",
+ "tagptr",
+ "thiserror",
+ "triomphe",
+ "uuid",
+]
+
 [[package]]
 name = "net2"
 version = "0.2.38"
@@ -1141,6 +1314,29 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "parking_lot"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3742b2c103b9f06bc9fff0a37ff4912935851bee6d36f3c02bcc755bcfec228f"
+dependencies = [
+ "lock_api",
+ "parking_lot_core",
+]
+
+[[package]]
+name = "parking_lot_core"
+version = "0.9.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9069cbb9f99e3a5083476ccb29ceb1de18b9118cafa53e90c9551235de2b9521"
+dependencies = [
+ "cfg-if 1.0.0",
+ "libc",
+ "redox_syscall 0.2.16",
+ "smallvec",
+ "windows-sys",
+]
+
 [[package]]
 name = "password-hash"
 version = "0.3.2"
@@ -1283,11 +1479,23 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "pulldown-cmark"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2d9cc634bc78768157b5cbfe988ffcd1dcba95cd2b2f03a88316c08c6d00ed63"
+dependencies = [
+ "bitflags 1.3.2",
+ "memchr",
+ "unicase 2.6.0",
+]
+
 [[package]]
 name = "qchgk_web"
 version = "0.1.1"
 dependencies = [
  "chgk_ledb_lib",
+ "moka",
  "rand",
  "rocket",
  "rocket_contrib",
@@ -1295,6 +1503,22 @@ dependencies = [
  "serde_json",
 ]
 
+[[package]]
+name = "quanta"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b7e31331286705f455e56cca62e0e717158474ff02b7936c1fa596d983f4ae27"
+dependencies = [
+ "crossbeam-utils",
+ "libc",
+ "mach",
+ "once_cell",
+ "raw-cpuid",
+ "wasi 0.10.0+wasi-snapshot-preview1",
+ "web-sys",
+ "winapi 0.3.9",
+]
+
 [[package]]
 name = "quote"
 version = "0.6.13"
@@ -1343,6 +1567,15 @@ dependencies = [
  "getrandom",
 ]
 
+[[package]]
+name = "raw-cpuid"
+version = "10.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c297679cb867470fa8c9f67dbba74a78d78e3e98d7cf2b08d6d71540f797332"
+dependencies = [
+ "bitflags 1.3.2",
+]
+
 [[package]]
 name = "redox_syscall"
 version = "0.2.16"
@@ -1352,6 +1585,15 @@ dependencies = [
  "bitflags 1.3.2",
 ]
 
+[[package]]
+name = "redox_syscall"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "567664f262709473930a4bf9e51bf2ebf3348f2e748ccc50dea20646858f8f29"
+dependencies = [
+ "bitflags 1.3.2",
+]
+
 [[package]]
 name = "redox_users"
 version = "0.4.3"
@@ -1359,7 +1601,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b033d837a7cf162d7993aded9304e30a83213c648b6e389db233191f891e5c2b"
 dependencies = [
  "getrandom",
- "redox_syscall",
+ "redox_syscall 0.2.16",
  "thiserror",
 ]
 
@@ -1465,6 +1707,29 @@ version = "0.1.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d4a36c42d1873f9a77c53bde094f9664d9891bc604a45b4798fd2c389ed12e5b"
 
+[[package]]
+name = "rustc_version"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bfa0f585226d2e68097d4f95d113b15b83a82e819ab25717ec0590d9584ef366"
+dependencies = [
+ "semver",
+]
+
+[[package]]
+name = "rustix"
+version = "0.37.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d097081ed288dfe45699b72f5b5d648e5f15d64d900c7080273baa20c16a6849"
+dependencies = [
+ "bitflags 1.3.2",
+ "errno",
+ "io-lifetimes",
+ "libc",
+ "linux-raw-sys",
+ "windows-sys",
+]
+
 [[package]]
 name = "ryu"
 version = "1.0.13"
@@ -1486,12 +1751,36 @@ dependencies = [
  "winapi-util",
 ]
 
+[[package]]
+name = "scheduled-thread-pool"
+version = "0.2.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3cbc66816425a074528352f5789333ecff06ca41b36b0b0efdfbb29edc391a19"
+dependencies = [
+ "parking_lot",
+]
+
+[[package]]
+name = "scopeguard"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
+
 [[package]]
 name = "scratch"
 version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1792db035ce95be60c3f8853017b3999209281c24e2ba5bc8e59bf97a0c590c1"
 
+[[package]]
+name = "semver"
+version = "1.0.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bebd363326d05ec3e2f532ab7660680f3b02130d780c299bca73469d521bc0ed"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "serde"
 version = "1.0.159"
@@ -1568,6 +1857,21 @@ dependencies = [
  "digest 0.10.6",
 ]
 
+[[package]]
+name = "skeptic"
+version = "0.13.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "16d23b015676c90a0f01c197bfdc786c20342c73a0afdda9025adb0bc42940a8"
+dependencies = [
+ "bytecount",
+ "cargo_metadata",
+ "error-chain",
+ "glob 0.3.1",
+ "pulldown-cmark",
+ "tempfile",
+ "walkdir",
+]
+
 [[package]]
 name = "slab"
 version = "0.4.8"
@@ -1643,6 +1947,25 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "tagptr"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b2093cf4c8eb1e67749a6762251bc9cd836b6fc171623bd0a9d324d37af2417"
+
+[[package]]
+name = "tempfile"
+version = "3.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b9fbec84f381d5795b08656e4912bec604d162bff9291d6189a78f4c8ab87998"
+dependencies = [
+ "cfg-if 1.0.0",
+ "fastrand",
+ "redox_syscall 0.3.5",
+ "rustix",
+ "windows-sys",
+]
+
 [[package]]
 name = "tera"
 version = "0.11.20"
@@ -1761,6 +2084,12 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "efd1f82c56340fdf16f2a953d7bda4f8fdffba13d93b00844c25572110b26079"
 
+[[package]]
+name = "triomphe"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1ee9bd9239c339d714d657fac840c6d2a4f9c45f4f9ec7b0975113458be78db"
+
 [[package]]
 name = "typeable"
 version = "0.1.2"
@@ -1838,6 +2167,15 @@ dependencies = [
  "version_check 0.1.5",
 ]
 
+[[package]]
+name = "unicase"
+version = "2.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50f37be617794602aabbeee0be4f259dc1778fabe05e2d67ee8f79326d5cb4f6"
+dependencies = [
+ "version_check 0.9.4",
+]
+
 [[package]]
 name = "unicode-bidi"
 version = "0.3.13"
@@ -1892,6 +2230,15 @@ dependencies = [
  "percent-encoding 1.0.1",
 ]
 
+[[package]]
+name = "uuid"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1674845326ee10d37ca60470760d4288a6f80f304007d92e5c53bab78c9cfd79"
+dependencies = [
+ "getrandom",
+]
+
 [[package]]
 name = "version_check"
 version = "0.1.5"
@@ -1986,6 +2333,16 @@ version = "0.2.84"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0046fef7e28c3804e5e38bfa31ea2a0f73905319b677e57ebe37e49358989b5d"
 
+[[package]]
+name = "web-sys"
+version = "0.3.61"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e33b99f4b23ba3eec1a53ac264e35a755f00e966e0065077d6027c0f575b0b97"
+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "winapi"
 version = "0.2.8"

Cargo.toml

@@ -15,6 +15,7 @@ serde="1.0"
 serde_json="1.0"
 rocket="0.4"
 chgk_ledb_lib = {git = "https://gitea.b4tman.ru/b4tman/chgk_ledb.git", rev="8120a996a3", package="chgk_ledb_lib"}
+moka = "0.10.1"
 
 [dependencies.rocket_contrib]
 version = "0.4"

src/main.rs

@@ -15,11 +15,15 @@ use rocket_contrib::templates::Template;
 use rand::distributions::Uniform;
 use rand::Rng;
 
+use std::ops::Deref;
 use std::sync::Arc;
 
 use chgk_ledb_lib::db;
 use chgk_ledb_lib::questions::Question;
 
+use moka::sync::Cache;
+use std::time::Duration;
+
 const DB_FILENAME: &str = "db.dat";
 
 trait ErrorEmpty {
@@ -34,9 +38,27 @@ impl<T, E> ErrorEmpty for Result<T, E> {
     }
 }
 
+#[derive(Clone)]
+struct ArcTemplateData {
+    value: Arc<serde_json::Value>,
+}
+
+impl ArcTemplateData {
+    fn new(value: serde_json::Value) -> ArcTemplateData {
+        ArcTemplateData {
+            value: Arc::new(value),
+        }
+    }
+    fn render(&self, name: &'static str) -> Template {
+        Template::render(name, self.value.deref())
+    }
+}
+
+type TemplateCache = moka::sync::Cache<usize, ArcTemplateData>;
+
 type DataBaseInner = db::Reader<Question>;
 type DataBase = Arc<DataBaseInner>;
-struct AppState{
+struct AppState {
     db: DataBase,
     database_distribution: Uniform<usize>,
 }
@@ -49,7 +71,7 @@ impl From<DataBaseInner> for AppState {
 
         Self {
             db,
-            database_distribution
+            database_distribution,
         }
     }
 }
@@ -63,7 +85,16 @@ fn get_question(db: &DataBase, id: usize) -> Result<Question, ()> {
     db.get(id - 1).err_empty()
 }
 
-fn show_question_details(template_name: &'static str, data: &AppState, id: usize) -> Template {
+fn show_question_details(
+    template_name: &'static str,
+    data: &AppState,
+    cache: &TemplateCache,
+    id: usize,
+) -> Template {
+    if let Some(value) = cache.get(&id) {
+        return value.render(template_name);
+    }
+
     match get_question(&data.db, id) {
         Ok(question) => {
             let mut context = serde_json::to_value(question).expect("question serialize");
@@ -71,7 +102,12 @@ fn show_question_details(template_name: &'static str, data: &AppState, id: usize
                 let next_id = random_question_id(&data.database_distribution);
                 context["next"] = serde_json::to_value(next_id).expect("question id serialize");
             }
-            Template::render(template_name, &context)
+
+            let value = ArcTemplateData::new(context);
+            let result = value.render(template_name);
+            cache.insert(id, value);
+
+            result
         }
         Err(_) => {
             use std::collections::HashMap;
@@ -82,13 +118,13 @@ fn show_question_details(template_name: &'static str, data: &AppState, id: usize
 }
 
 #[get("/q/<id>")]
-fn show_question(data: State<AppState>, id: usize) -> Template {
+fn show_question(data: State<AppState>, cache: State<TemplateCache>, id: usize) -> Template {
-    show_question_details("question", data.inner(), id)
+    show_question_details("question", data.inner(), cache.inner(), id)
 }
 
 #[get("/q/<id>/a")]
-fn show_answer(data: State<AppState>, id: usize) -> Template {
+fn show_answer(data: State<AppState>, cache: State<TemplateCache>, id: usize) -> Template {
-    show_question_details("answer", data.inner(), id)
+    show_question_details("answer", data.inner(), cache.inner(), id)
 }
 
 #[get("/q/0")]
@@ -116,9 +152,14 @@ fn not_found(_req: &rocket::Request) -> Template {
 
 fn rocket() -> Rocket {
     let state: AppState = db::Reader::new(DB_FILENAME, 2048).expect("open db").into();
+    let cache: TemplateCache = Cache::builder()
+        .time_to_idle(Duration::from_secs(15 * 60))
+        .max_capacity(300)
+        .build();
 
     rocket::ignite()
         .manage(state)
+        .manage(cache)
         .register(catchers![not_found])
         .mount(
             "/",