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Database interactions/redis (#524)

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Co-authored-by: Rob Ede <robjtede@icloud.com>
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Christopher Gubbin 2022-02-15 00:35:00 +00:00 committed by GitHub
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commit 5c1e25fe52
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@ -36,7 +36,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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"crossbeam-channel 0.4.4", "crossbeam-channel 0.4.4",
@ -45,7 +45,7 @@ dependencies = [
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@ -61,6 +61,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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@ -70,7 +71,7 @@ dependencies = [
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@ -248,7 +249,6 @@ version = "2.2.2"
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@ -4280,7 +4104,7 @@ version = "0.8.0"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d95f5254224e617595d2cc3cc73ff0a5eaf2637519e25f03388154e9378b6ffa" checksum = "d95f5254224e617595d2cc3cc73ff0a5eaf2637519e25f03388154e9378b6ffa"
dependencies = [ dependencies = [
"crypto-mac 0.11.1", "crypto-mac",
] ]
[[package]] [[package]]
@ -4473,17 +4297,6 @@ version = "0.3.24"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "58893f751c9b0412871a09abd62ecd2a00298c6c83befa223ef98c52aef40cbe" checksum = "58893f751c9b0412871a09abd62ecd2a00298c6c83befa223ef98c52aef40cbe"
[[package]]
name = "polyval"
version = "0.4.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "eebcc4aa140b9abd2bc40d9c3f7ccec842679cd79045ac3a7ac698c1a064b7cd"
dependencies = [
"cpuid-bool",
"opaque-debug 0.3.0",
"universal-hash",
]
[[package]] [[package]]
name = "polyval" name = "polyval"
version = "0.5.3" version = "0.5.3"
@ -4688,7 +4501,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "545c5bc2b880973c9c10e4067418407a0ccaa3091781d1671d46eb35107cb26f" checksum = "545c5bc2b880973c9c10e4067418407a0ccaa3091781d1671d46eb35107cb26f"
dependencies = [ dependencies = [
"log", "log",
"parking_lot 0.11.2", "parking_lot",
"scheduled-thread-pool", "scheduled-thread-pool",
] ]
@ -4825,21 +4638,6 @@ dependencies = [
"url", "url",
] ]
[[package]]
name = "redis-async"
version = "0.6.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ffc6ce852b893ec227e1671953c153ac92a27a6f458b9623309dcbfa18edb057"
dependencies = [
"bytes 0.5.6",
"futures-channel",
"futures-sink",
"futures-util",
"log",
"tokio 0.2.25",
"tokio-util 0.3.1",
]
[[package]] [[package]]
name = "redis-async" name = "redis-async"
version = "0.8.1" version = "0.8.1"
@ -4859,8 +4657,8 @@ dependencies = [
name = "redis_session" name = "redis_session"
version = "1.0.0" version = "1.0.0"
dependencies = [ dependencies = [
"actix-redis 0.10.0-beta.5", "actix-redis",
"actix-session 0.5.0-beta.7", "actix-session",
"actix-test", "actix-test",
"actix-web 4.0.0-rc.3", "actix-web 4.0.0-rc.3",
"env_logger 0.9.0", "env_logger 0.9.0",
@ -5321,7 +5119,7 @@ version = "0.2.5"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "dc6f74fd1204073fa02d5d5d68bec8021be4c38690b61264b2fdb48083d0e7d7" checksum = "dc6f74fd1204073fa02d5d5d68bec8021be4c38690b61264b2fdb48083d0e7d7"
dependencies = [ dependencies = [
"parking_lot 0.11.2", "parking_lot",
] ]
[[package]] [[package]]
@ -5492,13 +5290,10 @@ dependencies = [
name = "server-sent-events" name = "server-sent-events"
version = "1.0.0" version = "1.0.0"
dependencies = [ dependencies = [
"actix-web 4.0.0-rc.3", "actix-web 3.3.3",
"env_logger 0.9.0", "env_logger 0.8.4",
"futures-util", "futures",
"log", "tokio 0.2.25",
"parking_lot 0.12.0",
"tokio 1.16.1",
"tokio-stream",
] ]
[[package]] [[package]]
@ -5772,7 +5567,7 @@ dependencies = [
"log", "log",
"memchr", "memchr",
"once_cell", "once_cell",
"parking_lot 0.11.2", "parking_lot",
"percent-encoding", "percent-encoding",
"rustls 0.19.1", "rustls 0.19.1",
"serde 1.0.136", "serde 1.0.136",
@ -5916,7 +5711,7 @@ checksum = "923f0f39b6267d37d23ce71ae7235602134b250ace715dd2c90421998ddac0c6"
dependencies = [ dependencies = [
"lazy_static", "lazy_static",
"new_debug_unreachable", "new_debug_unreachable",
"parking_lot 0.11.2", "parking_lot",
"phf_shared 0.8.0", "phf_shared 0.8.0",
"precomputed-hash", "precomputed-hash",
"serde 1.0.136", "serde 1.0.136",
@ -6235,7 +6030,7 @@ name = "todo"
version = "1.0.0" version = "1.0.0"
dependencies = [ dependencies = [
"actix-files 0.6.0-beta.16", "actix-files 0.6.0-beta.16",
"actix-session 0.5.0-beta.7", "actix-session",
"actix-web 4.0.0-rc.3", "actix-web 4.0.0-rc.3",
"dotenv", "dotenv",
"env_logger 0.9.0", "env_logger 0.9.0",
@ -6281,7 +6076,7 @@ dependencies = [
"mio 0.7.14", "mio 0.7.14",
"num_cpus", "num_cpus",
"once_cell", "once_cell",
"parking_lot 0.11.2", "parking_lot",
"pin-project-lite 0.2.8", "pin-project-lite 0.2.8",
"signal-hook-registry", "signal-hook-registry",
"tokio-macros", "tokio-macros",
@ -6353,7 +6148,7 @@ dependencies = [
"fallible-iterator", "fallible-iterator",
"futures", "futures",
"log", "log",
"parking_lot 0.11.2", "parking_lot",
"percent-encoding", "percent-encoding",
"phf 0.10.1", "phf 0.10.1",
"pin-project-lite 0.2.8", "pin-project-lite 0.2.8",
@ -6558,7 +6353,7 @@ dependencies = [
"lazy_static", "lazy_static",
"log", "log",
"lru-cache", "lru-cache",
"parking_lot 0.11.2", "parking_lot",
"resolv-conf", "resolv-conf",
"smallvec", "smallvec",
"thiserror", "thiserror",
@ -7242,49 +7037,6 @@ version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f" checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
[[package]]
name = "windows-sys"
version = "0.32.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3df6e476185f92a12c072be4a189a0210dcdcf512a1891d6dff9edb874deadc6"
dependencies = [
"windows_aarch64_msvc",
"windows_i686_gnu",
"windows_i686_msvc",
"windows_x86_64_gnu",
"windows_x86_64_msvc",
]
[[package]]
name = "windows_aarch64_msvc"
version = "0.32.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d8e92753b1c443191654ec532f14c199742964a061be25d77d7a96f09db20bf5"
[[package]]
name = "windows_i686_gnu"
version = "0.32.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "6a711c68811799e017b6038e0922cb27a5e2f43a2ddb609fe0b6f3eeda9de615"
[[package]]
name = "windows_i686_msvc"
version = "0.32.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "146c11bb1a02615db74680b32a68e2d61f553cc24c4eb5b4ca10311740e44172"
[[package]]
name = "windows_x86_64_gnu"
version = "0.32.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c912b12f7454c6620635bbff3450962753834be2a594819bd5e945af18ec64bc"
[[package]]
name = "windows_x86_64_msvc"
version = "0.32.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "504a2476202769977a040c6364301a3f65d0cc9e3fb08600b2bda150a0488316"
[[package]] [[package]]
name = "winreg" name = "winreg"
version = "0.6.2" version = "0.6.2"

13
database_interactions/redis/Cargo.toml
View File

@ -4,10 +4,11 @@ version = "1.0.0"
edition = "2021" edition = "2021"
[dependencies] [dependencies]
actix = "0.10" actix = "0.12"
actix-web = "3" actix-web = "4.0.0-rc.3"
actix-redis = "0.9" actix-redis = "0.10.0-beta.6"
futures = "0.3" futures-util = { version = "0.3.7", default-features = false, features = ["std"] }
redis-async = "0.6.3" log = "0.4"
redis-async = { version = "0.8", default_features = false, features = ["tokio10"] }
serde = { version = "1", features = ["derive"] } serde = { version = "1", features = ["derive"] }
env_logger = "0.8" env_logger = "0.9"

66
database_interactions/redis/README.md
View File

@ -1,15 +1,65 @@
This project illustrates how to send multiple cache requests to redis in bulk, asynchronously. # Redis
This asyncio approach resembles traditional redis pipelining. Details about how this
is so can be read at https://github.com/benashford/redis-async-rs/issues/19#issuecomment-412208018
This project illustrates how to send multiple cache requests to Redis in bulk, asynchronously. This approach resembles traditional Redis pipelining. [See here for more details about this approach.](https://github.com/benashford/redis-async-rs/issues/19#issuecomment-412208018)
## Start Server
To test the demo, POST a json object containing three strings to the /stuff endpoint: ```sh
{"one": "first entry", cd database_interactions/redis
cargo run
```
## Endpoints
### `POST /stuff`
To test the demo, POST a json object containing three strings to the `/stuff` endpoint:
```json
{
"one": "first entry",
"two": "second entry", "two": "second entry",
"three": "third entry" } "three": "third entry"
}
```
These three entries will cache to redis, keyed accordingly. These three entries will cache to redis, keyed accordingly.
to delete these, simply issue a DELETE http request to /stuff endpoint Using [HTTPie]:
```sh
http :8080/stuff one="first entry" two="second entry" three="third entry"
```
Using [cURL]:
```sh
curl localhost:8080/stuff -H 'content-type: application/json' -d '{"one":"first entry","two":"second entry","three":"third entry"}'
```
### `DELETE /stuff`
To delete these, simply issue a DELETE http request to /stuff endpoint
Using [HTTPie]:
```sh
http DELETE :8080/stuff
```
Using [cURL]:
```sh
curl -XDELETE 127.0.0.1:8080/stuff
```
## Verify Redis Contents
At any time, verify the contents of Redis using its CLI:
```sh
echo "MGET mydomain:one mydomain:two mydomain:three" | redis-cli
```
[HTTPie]: https://httpie.org
[cURL]: https://curl.haxx.se

60
database_interactions/redis/src/main.rs
View File

@ -1,7 +1,7 @@
use actix::prelude::*; use actix::prelude::*;
use actix_redis::{Command, RedisActor}; use actix_redis::{Command, RedisActor};
use actix_web::{middleware, web, App, Error as AWError, HttpResponse, HttpServer}; use actix_web::{error, middleware, web, App, HttpResponse, HttpServer};
use futures::future::join_all; use futures_util::future::try_join_all;
use redis_async::{resp::RespValue, resp_array}; use redis_async::{resp::RespValue, resp_array};
use serde::Deserialize; use serde::Deserialize;
@ -15,42 +15,40 @@ pub struct CacheInfo {
async fn cache_stuff( async fn cache_stuff(
info: web::Json<CacheInfo>, info: web::Json<CacheInfo>,
redis: web::Data<Addr<RedisActor>>, redis: web::Data<Addr<RedisActor>>,
) -> Result<HttpResponse, AWError> { ) -> actix_web::Result<HttpResponse> {
let info = info.into_inner(); let info = info.into_inner();
let one = redis.send(Command(resp_array!["SET", "mydomain:one", info.one])); let one = redis.send(Command(resp_array!["SET", "mydomain:one", info.one]));
let two = redis.send(Command(resp_array!["SET", "mydomain:two", info.two])); let two = redis.send(Command(resp_array!["SET", "mydomain:two", info.two]));
let three = redis.send(Command(resp_array!["SET", "mydomain:three", info.three])); let three = redis.send(Command(resp_array!["SET", "mydomain:three", info.three]));
// Creates a future which represents a collection of the results of the futures // Asynchronously collects the results of the futures given. The returned future will drive
// given. The returned future will drive execution for all of its underlying futures, // execution for all of its underlying futures, collecting the results into a destination
// collecting the results into a destination `Vec<RespValue>` in the same order as they // `Vec<RespValue>` in the same order as they were provided. If any future returns an error then
// were provided. If any future returns an error then all other futures will be // all other futures will be canceled and an error will be returned immediately. If all futures
// canceled and an error will be returned immediately. If all futures complete // complete successfully, however, then the returned future will succeed with a `Vec` of all the
// successfully, however, then the returned future will succeed with a `Vec` of // successful results.
// all the successful results. let res = try_join_all([one, two, three])
let res: Vec<Result<RespValue, AWError>> =
join_all(vec![one, two, three].into_iter())
.await .await
.map_err(error::ErrorInternalServerError)?
.into_iter() .into_iter()
.map(|item| { .map(|item| item.map_err(error::ErrorInternalServerError))
item.map_err(AWError::from) .collect::<Result<Vec<_>, _>>()?;
.and_then(|res| res.map_err(AWError::from))
})
.collect();
// successful operations return "OK", so confirm that all returned as so // successful operations return "OK", so confirm that all returned as so
if !res if res
.iter() .iter()
.all(|res| matches!(res,Ok(RespValue::SimpleString(x)) if x == "OK")) .all(|res| matches!(res, RespValue::SimpleString(x) if x == "OK"))
{ {
Ok(HttpResponse::InternalServerError().finish())
} else {
Ok(HttpResponse::Ok().body("successfully cached values")) Ok(HttpResponse::Ok().body("successfully cached values"))
} else {
Ok(HttpResponse::InternalServerError().finish())
} }
} }
async fn del_stuff(redis: web::Data<Addr<RedisActor>>) -> Result<HttpResponse, AWError> { async fn del_stuff(
redis: web::Data<Addr<RedisActor>>,
) -> actix_web::Result<HttpResponse> {
let res = redis let res = redis
.send(Command(resp_array![ .send(Command(resp_array![
"DEL", "DEL",
@ -58,14 +56,17 @@ async fn del_stuff(redis: web::Data<Addr<RedisActor>>) -> Result<HttpResponse, A
"mydomain:two", "mydomain:two",
"mydomain:three" "mydomain:three"
])) ]))
.await?; .await
.map_err(error::ErrorInternalServerError)?
.map_err(error::ErrorInternalServerError)?;
match res { match res {
Ok(RespValue::Integer(x)) if x == 3 => { RespValue::Integer(x) if x == 3 => {
Ok(HttpResponse::Ok().body("successfully deleted values")) Ok(HttpResponse::Ok().body("successfully deleted values"))
} }
_ => { _ => {
println!("---->{:?}", res); log::error!("{:?}", res);
Ok(HttpResponse::InternalServerError().finish()) Ok(HttpResponse::InternalServerError().finish())
} }
} }
@ -73,14 +74,15 @@ async fn del_stuff(redis: web::Data<Addr<RedisActor>>) -> Result<HttpResponse, A
#[actix_web::main] #[actix_web::main]
async fn main() -> std::io::Result<()> { async fn main() -> std::io::Result<()> {
std::env::set_var("RUST_LOG", "actix_web=trace,actix_redis=trace"); env_logger::init_from_env(env_logger::Env::new().default_filter_or("info"));
env_logger::init();
log::info!("starting HTTP server at http://localhost:8080");
HttpServer::new(|| { HttpServer::new(|| {
let redis_addr = RedisActor::start("127.0.0.1:6379"); let redis_addr = RedisActor::start("127.0.0.1:6379");
App::new() App::new()
.data(redis_addr) .app_data(web::Data::new(redis_addr))
.wrap(middleware::Logger::default()) .wrap(middleware::Logger::default())
.service( .service(
web::resource("/stuff") web::resource("/stuff")
@ -88,7 +90,7 @@ async fn main() -> std::io::Result<()> {
.route(web::delete().to(del_stuff)), .route(web::delete().to(del_stuff)),
) )
}) })
.bind("0.0.0.0:8080")? .bind(("127.0.0.1", 8080))?
.run() .run()
.await .await
} }