Get the app to connect to Redis

.idea/inspectionProfiles/Project_Default.xml

@@ -0,0 +1,10 @@
+<component name="InspectionProjectProfileManager">
+  <profile version="1.0">
+    <option name="myName" value="Project Default" />
+    <inspection_tool class="SpellCheckingInspection" enabled="false" level="TYPO" enabled_by_default="false">
+      <option name="processCode" value="true" />
+      <option name="processLiterals" value="true" />
+      <option name="processComments" value="true" />
+    </inspection_tool>
+  </profile>
+</component>

Cargo.lock

@@ -2,6 +2,23 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "ahash"
+version = "0.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fcb51a0695d8f838b1ee009b3fbf66bda078cd64590202a864a8f3e8c4315c47"
+dependencies = [
+ "getrandom",
+ "once_cell",
+ "version_check",
+]
+
+[[package]]
+name = "arc-swap"
+version = "1.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "983cd8b9d4b02a6dc6ffa557262eb5858a27a0038ffffe21a0f133eaa819a164"
+
 [[package]]
 name = "async-trait"
 version = "0.1.58"
@@ -91,14 +108,26 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "35ed6e9d84f0b51a7f52daf1c7d71dd136fd7a3f41a8462b8cdb8c78d920fad4"
 dependencies = [
  "bytes",
+ "futures-core",
  "memchr",
+ "pin-project-lite",
+ "tokio",
+ "tokio-util",
 ]
 
+[[package]]
+name = "crc16"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "338089f42c427b86394a5ee60ff321da23a5c89c9d89514c829687b26359fcff"
+
 [[package]]
 name = "distributed-arcade"
 version = "0.1.0"
 dependencies = [
  "axum",
+ "lazy_static",
+ "r2d2",
  "redis",
  "tokio",
 ]
@@ -118,6 +147,21 @@ dependencies = [
  "percent-encoding",
 ]
 
+[[package]]
+name = "futures"
+version = "0.3.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "38390104763dc37a5145a53c29c63c1290b5d316d6086ec32c293f6736051bb0"
+dependencies = [
+ "futures-channel",
+ "futures-core",
+ "futures-executor",
+ "futures-io",
+ "futures-sink",
+ "futures-task",
+ "futures-util",
+]
+
 [[package]]
 name = "futures-channel"
 version = "0.3.25"
@@ -125,6 +169,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "52ba265a92256105f45b719605a571ffe2d1f0fea3807304b522c1d778f79eed"
 dependencies = [
  "futures-core",
+ "futures-sink",
 ]
 
 [[package]]
@@ -133,6 +178,40 @@ version = "0.3.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "04909a7a7e4633ae6c4a9ab280aeb86da1236243a77b694a49eacd659a4bd3ac"
 
+[[package]]
+name = "futures-executor"
+version = "0.3.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7acc85df6714c176ab5edf386123fafe217be88c0840ec11f199441134a074e2"
+dependencies = [
+ "futures-core",
+ "futures-task",
+ "futures-util",
+]
+
+[[package]]
+name = "futures-io"
+version = "0.3.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "00f5fb52a06bdcadeb54e8d3671f8888a39697dcb0b81b23b55174030427f4eb"
+
+[[package]]
+name = "futures-macro"
+version = "0.3.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bdfb8ce053d86b91919aad980c220b1fb8401a9394410e1c289ed7e66b61835d"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "futures-sink"
+version = "0.3.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "39c15cf1a4aa79df40f1bb462fb39676d0ad9e366c2a33b590d7c66f4f81fcf9"
+
 [[package]]
 name = "futures-task"
 version = "0.3.25"
@@ -145,10 +224,27 @@ version = "0.3.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "197676987abd2f9cadff84926f410af1c183608d36641465df73ae8211dc65d6"
 dependencies = [
+ "futures-channel",
  "futures-core",
+ "futures-io",
+ "futures-macro",
+ "futures-sink",
  "futures-task",
+ "memchr",
  "pin-project-lite",
  "pin-utils",
+ "slab",
+]
+
+[[package]]
+name = "getrandom"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c05aeb6a22b8f62540c194aac980f2115af067bfe15a0734d7277a768d396b31"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
 ]
 
 [[package]]
@@ -239,6 +335,12 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4217ad341ebadf8d8e724e264f13e593e0648f5b3e94b3896a5df283be015ecc"
 
+[[package]]
+name = "lazy_static"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+
 [[package]]
 name = "libc"
 version = "0.2.137"
@@ -371,6 +473,12 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 
+[[package]]
+name = "ppv-lite86"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.47"
@@ -389,17 +497,70 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "r2d2"
+version = "0.8.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "51de85fb3fb6524929c8a2eb85e6b6d363de4e8c48f9e2c2eac4944abc181c93"
+dependencies = [
+ "log",
+ "parking_lot",
+ "scheduled-thread-pool",
+]
+
+[[package]]
+name = "rand"
+version = "0.8.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
+dependencies = [
+ "libc",
+ "rand_chacha",
+ "rand_core",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
+dependencies = [
+ "ppv-lite86",
+ "rand_core",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
+dependencies = [
+ "getrandom",
+]
+
 [[package]]
 name = "redis"
 version = "0.22.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "513b3649f1a111c17954296e4a3b9eecb108b766c803e2b99f179ebe27005985"
 dependencies = [
+ "ahash",
+ "arc-swap",
+ "async-trait",
+ "bytes",
  "combine",
+ "crc16",
+ "futures",
+ "futures-util",
  "itoa",
  "percent-encoding",
+ "pin-project-lite",
+ "r2d2",
+ "rand",
  "ryu",
  "sha1_smol",
+ "tokio",
+ "tokio-util",
  "url",
 ]
 
@@ -418,6 +579,15 @@ version = "1.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4501abdff3ae82a1c1b477a17252eb69cee9e66eb915c1abaa4f44d873df9f09"
 
+[[package]]
+name = "scheduled-thread-pool"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "977a7519bff143a44f842fd07e80ad1329295bd71686457f18e496736f4bf9bf"
+dependencies = [
+ "parking_lot",
+]
+
 [[package]]
 name = "scopeguard"
 version = "1.1.0"
@@ -468,6 +638,15 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "slab"
+version = "0.4.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4614a76b2a8be0058caa9dbbaf66d988527d86d003c11a94fbd335d7661edcef"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "smallvec"
 version = "1.10.0"
@@ -547,6 +726,20 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "tokio-util"
+version = "0.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0bb2e075f03b3d66d8d8785356224ba688d2906a371015e225beeb65ca92c740"
+dependencies = [
+ "bytes",
+ "futures-core",
+ "futures-sink",
+ "pin-project-lite",
+ "tokio",
+ "tracing",
+]
+
 [[package]]
 name = "tower"
 version = "0.4.13"
@@ -653,6 +846,12 @@ dependencies = [
  "percent-encoding",
 ]
 
+[[package]]
+name = "version_check"
+version = "0.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
+
 [[package]]
 name = "want"
 version = "0.3.0"

Cargo.toml

@@ -6,6 +6,8 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-redis = { version = "0.22.1" }
+redis = { version = "0.22.1", features=["r2d2", "ahash", "cluster", "tokio-comp", "connection-manager"] }
 axum = { version = "0.5.17" }
 tokio = { version = "1.21.2", features=["full"] }
+r2d2 = { version = "0.8.10" }
+lazy_static = { version = "1.4.0" }

src/config.rs

@@ -0,0 +1,14 @@
+use lazy_static::lazy_static;
+use std::net::SocketAddr;
+use std::env;
+
+
+lazy_static! {
+    pub static ref REDIS_CONN: String = env::var("REDIS_CONN_STRING")
+        .expect("REDIS_CONN_STRING to be set");
+
+    pub static ref AXUM_HOST: SocketAddr = env::var("AXUM_HOST_STRING")
+        .expect("AXUM_HOST_STRING to be set")
+        .parse()
+        .expect("AXUM_HOST_STRING to be a valid SocketAddr");
+}

src/main.rs

@@ -1,35 +1,60 @@
+mod config;
+
 use axum::routing::{get, put};
-use axum::Json;
+use axum::{Json, Extension};
+use redis::AsyncCommands;
 
 
 #[tokio::main]
 async fn main() {
-    let app = axum::Router::new()
+    let rclient = redis::Client::open(&**config::REDIS_CONN)
+        .expect("to be able to connect to Redis");
+
+    let webapp = axum::Router::new()
         .route("/", get(get_home))
         .route("/leaderboard", get(get_leaderboard))
         .route("/score", get(get_score))
-        .route("/score", put(update_score));
+        .route("/score", put(update_score))
+        .layer(Extension(rclient));
 
-    axum::Server::bind(&"0.0.0.0:30000".parse().unwrap())
+    axum::Server::bind(&config::AXUM_HOST).serve(webapp.into_make_service()).await
-        .serve(app.into_make_service()).await.unwrap();
+        .expect("to be able to run the Axum server");
 }
 
 
-async fn get_home() -> String {
+async fn get_home(
-    String::from("Hello world!")
+    Extension(rclient): Extension<redis::Client>
+) -> String {
+
+    let mut rconn = rclient.get_async_connection().await
+        .expect("to be able to create a Redis connection");
+
+    rconn.set::<&str, &str, String>("hello", "world").await
+        .expect("to be able to set things in redis");
+
+    let world: String = rconn.get("hello").await
+        .expect("to be able to get things from redis");
+
+    format!("Hello {world}!")
 }
 
 
-async fn get_leaderboard() {
+async fn get_leaderboard(
+    Extension(rclient): Extension<redis::Client>
+) {
     todo!()
 }
 
 
-async fn get_score() {
+async fn get_score(
+    Extension(rclient): Extension<redis::Client>
+) {
     todo!()
 }
 
 
-async fn update_score() {
+async fn update_score(
+    Extension(rclient): Extension<redis::Client>
+) {
     todo!()
 }