Add metrics

Cargo.lock

@@ -17,6 +17,18 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
 
+[[package]]
+name = "ahash"
+version = "0.8.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77c3a9648d43b9cd48db467b3f87fdd6e146bcc88ab0180006cef2179fe11d01"
+dependencies = [
+ "cfg-if",
+ "once_cell",
+ "version_check",
+ "zerocopy",
+]
+
 [[package]]
 name = "aho-corasick"
 version = "1.1.2"
@@ -135,6 +147,29 @@ dependencies = [
  "tower-service",
 ]
 
+[[package]]
+name = "axum-prometheus"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "97def327c5481791abb57ac295bfc70f2e1a0727675b7dbf74bd1b27a72b6fd8"
+dependencies = [
+ "axum",
+ "axum-core",
+ "bytes",
+ "futures",
+ "futures-core",
+ "http",
+ "http-body",
+ "matchit",
+ "metrics",
+ "metrics-exporter-prometheus",
+ "once_cell",
+ "pin-project",
+ "tokio",
+ "tower",
+ "tower-http 0.4.4",
+]
+
 [[package]]
 name = "backtrace"
 version = "0.3.69"
@@ -173,6 +208,7 @@ name = "book_bot"
 version = "0.1.0"
 dependencies = [
  "axum",
+ "axum-prometheus",
  "base64",
  "chrono",
  "ctrlc",
@@ -659,13 +695,28 @@ dependencies = [
  "futures-sink",
  "futures-util",
  "http",
- "indexmap",
+ "indexmap 2.1.0",
  "slab",
  "tokio",
  "tokio-util",
  "tracing",
 ]
 
+[[package]]
+name = "hashbrown"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
+
+[[package]]
+name = "hashbrown"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "33ff8ae62cd3a9102e5637afc8452c55acf3844001bd5374e0b0bd7b6616c038"
+dependencies = [
+ "ahash",
+]
+
 [[package]]
 name = "hashbrown"
 version = "0.14.3"
@@ -817,6 +868,16 @@ dependencies = [
  "unicode-normalization",
 ]
 
+[[package]]
+name = "indexmap"
+version = "1.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bd070e393353796e801d209ad339e89596eb4c8d430d18ede6a1cced8fafbd99"
+dependencies = [
+ "autocfg",
+ "hashbrown 0.12.3",
+]
+
 [[package]]
 name = "indexmap"
 version = "2.1.0"
@@ -824,7 +885,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d530e1a18b1cb4c484e6e34556a0d948706958449fca0cab753d649f2bce3d1f"
 dependencies = [
  "equivalent",
- "hashbrown",
+ "hashbrown 0.14.3",
 ]
 
 [[package]]
@@ -936,6 +997,61 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "metrics"
+version = "0.21.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fde3af1a009ed76a778cb84fdef9e7dbbdf5775ae3e4cc1f434a6a307f6f76c5"
+dependencies = [
+ "ahash",
+ "metrics-macros",
+ "portable-atomic",
+]
+
+[[package]]
+name = "metrics-exporter-prometheus"
+version = "0.12.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d4fa7ce7c4862db464a37b0b31d89bca874562f034bd7993895572783d02950"
+dependencies = [
+ "base64",
+ "hyper",
+ "indexmap 1.9.3",
+ "ipnet",
+ "metrics",
+ "metrics-util",
+ "quanta",
+ "thiserror",
+ "tokio",
+ "tracing",
+]
+
+[[package]]
+name = "metrics-macros"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "38b4faf00617defe497754acde3024865bc143d44a86799b24e191ecff91354f"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.39",
+]
+
+[[package]]
+name = "metrics-util"
+version = "0.15.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4de2ed6e491ed114b40b732e4d1659a9d53992ebd87490c44a6ffe23739d973e"
+dependencies = [
+ "crossbeam-epoch",
+ "crossbeam-utils",
+ "hashbrown 0.13.1",
+ "metrics",
+ "num_cpus",
+ "quanta",
+ "sketches-ddsketch",
+]
+
 [[package]]
 name = "mime"
 version = "0.3.17"
@@ -1203,6 +1319,12 @@ version = "0.3.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "26072860ba924cbfa98ea39c8c19b4dd6a4a25423dbdf219c1eca91aa0cf6964"
 
+[[package]]
+name = "portable-atomic"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7170ef9988bc169ba16dd36a7fa041e5c4cbeb6a35b76d4c03daded371eae7c0"
+
 [[package]]
 name = "powerfmt"
 version = "0.2.0"
@@ -1728,6 +1850,12 @@ dependencies = [
  "walkdir",
 ]
 
+[[package]]
+name = "sketches-ddsketch"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68a406c1882ed7f29cd5e248c9848a80e7cb6ae0fea82346d2746f2f941c07e1"
+
 [[package]]
 name = "slab"
 version = "0.4.9"
@@ -2662,3 +2790,23 @@ dependencies = [
  "cfg-if",
  "windows-sys 0.48.0",
 ]
+
+[[package]]
+name = "zerocopy"
+version = "0.7.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "74d4d3961e53fa4c9a25a8637fc2bfaf2595b3d3ae34875568a5cf64787716be"
+dependencies = [
+ "zerocopy-derive",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.7.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ce1b18ccd8e73a9321186f97e46f9f04b778851177567b1975109d26a08d2a6"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.39",
+]