impl postgres pool conn

This commit is contained in:
rmanach 2023-04-18 12:06:56 +02:00
parent 0163525773
commit 64d91f4cbf
15 changed files with 1178 additions and 88 deletions

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.env Normal file
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POSTGRES_HOSTNAME=postgresql
POSTGRES_PORT=5432
POSTGRES_DB=dispatcher
POSTGRES_USER=rust
POSTGRES_PASSWORD=rust
MIGRATIONS_DIR=./migrations
DATABASE_URL=postgres://rust:rust@localhost:5433/dispatcher

930
Cargo.lock generated
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View File

@ -7,3 +7,9 @@ edition = "2021"
[dependencies]
lazy_static = "1.4.0"
postgres = "0.19.5"
r2d2 = "0.8.10"
diesel = { version = "2.0.0", features = ["postgres", "r2d2"] }
serde = { version = "1.0", features = ["derive"] }
serde_json = "1.0"
thiserror = "1.0"

View File

@ -8,4 +8,10 @@ build: format
cargo build --release
test:
cargo test -r -- --nocapture
cargo test -r -- --nocapture
db-start:
docker compose up postgresql -d
db-stop:
docker compose down

8
diesel.toml Normal file
View File

@ -0,0 +1,8 @@
# For documentation on how to configure this file,
# see https://diesel.rs/guides/configuring-diesel-cli
[print_schema]
file = "src/database/schema.rs"
[migrations_directory]
dir = "migrations"

21
docker-compose.yml Normal file
View File

@ -0,0 +1,21 @@
version: "3.7"
services:
postgresql:
image: postgres:13.2
restart: unless-stopped
env_file: .env
ports:
- 5433:5432
volumes:
- postgresql_data:/var/lib/postgresql/data/
networks:
- dispatcher_network
networks:
dispatcher_network:
name: dispatcher_network
volumes:
postgresql_data:

27
src/database/client.rs Normal file
View File

@ -0,0 +1,27 @@
use r2d2;
use diesel::pg::PgConnection;
use diesel::r2d2::ConnectionManager;
use lazy_static::lazy_static;
type Pool = r2d2::Pool<ConnectionManager<PgConnection>>;
pub type DbConnection = r2d2::PooledConnection<ConnectionManager<PgConnection>>;
lazy_static! {
static ref POOL: Pool = {
let database_url = "postgres://rust:rust@localhost:5433/dispatcher";
let manager = ConnectionManager::<PgConnection>::new(database_url);
Pool::new(manager).expect("failed to create db pool")
};
}
pub fn init_database_pool() {
lazy_static::initialize(&POOL);
}
pub fn get_connection() -> Result<DbConnection, String> {
match POOL.get() {
Ok(conn) => Ok(conn),
Err(e) => Err(format!("unable to get pool connection: {}", e)),
}
}

3
src/database/mod.rs Normal file
View File

@ -0,0 +1,3 @@
mod client;
pub use client::{get_connection, init_database_pool};

3
src/error/mod.rs Normal file
View File

@ -0,0 +1,3 @@
mod storer;
pub use storer::StorerError;

13
src/error/storer.rs Normal file
View File

@ -0,0 +1,13 @@
use thiserror::Error;
#[derive(Error, Debug)]
pub enum StorerError {
#[error("unable to insert `{0}`")]
InsertError(String),
#[error("unable to save `{0}`")]
SaveError(String),
#[error("unable to delete `{0}`")]
DeleteError(String),
#[error("unknown saver error")]
Unknown,
}

View File

@ -1,4 +1,7 @@
mod database;
mod error;
mod message;
mod model;
mod queue;
mod worker;
@ -6,6 +9,7 @@ use std::sync::mpsc::{channel, Sender};
use std::thread;
use std::time;
use database::{get_connection, init_database_pool};
use message::Message;
use queue::QueueController;
@ -41,6 +45,8 @@ impl<T: std::fmt::Debug + std::marker::Send + 'static> Dispatch<T> {
}
fn main() {
init_database_pool();
let dispatch: Dispatch<Message> = Dispatch::new();
let wait = time::Duration::from_secs(2);

79
src/model/job.rs Normal file
View File

@ -0,0 +1,79 @@
use crate::database::get_connection;
use std::time::Duration;
use std::{thread, time};
use super::{Runner, RunnerStatus, Storer};
use crate::error::StorerError;
#[derive(Debug)]
pub enum JobAction {
MegaportDeploy,
MegaportUndeploy,
MegaportCheckDeploy,
MegaportCheckUndeploy,
}
#[derive(Debug)]
pub struct Job {
id: i32,
action: JobAction,
status: RunnerStatus,
}
impl Job {
pub fn new(id: i32, action: JobAction) -> Self {
Self {
id: id,
action: action,
status: RunnerStatus::Pending,
}
}
pub fn set_status(&mut self, status: RunnerStatus) {
self.status = status;
}
}
impl Runner for Job {
fn run(&mut self) {
self.set_status(RunnerStatus::Running);
match self.action {
JobAction::MegaportDeploy => {
println!("[job({:?})] deploying megaport...", self);
}
JobAction::MegaportUndeploy => {
println!("[job({:?})] undeploying megaport...", self);
}
JobAction::MegaportCheckDeploy => {
println!("[job({:?})] ckecking megaport deployment...", self);
}
JobAction::MegaportCheckUndeploy => {
println!("[job({:?})] ckecking megaport undeployment...", self);
}
}
let wait = time::Duration::from_millis(1);
thread::sleep(wait);
self.set_status(RunnerStatus::Success);
}
fn set_status(&mut self, status: RunnerStatus) {
self.status = status;
}
}
impl Storer for Job {
fn insert(&self) -> Result<(), StorerError> {
Ok(())
}
fn save(&self) -> Result<(), StorerError> {
Ok(())
}
fn delete(&self) -> Result<(), StorerError> {
Ok(())
}
}

5
src/model/mod.rs Normal file
View File

@ -0,0 +1,5 @@
mod job;
mod traits;
pub use job::{Job, JobAction};
pub use traits::{Runner, RunnerStatus, Storer};

20
src/model/traits.rs Normal file
View File

@ -0,0 +1,20 @@
use crate::error::StorerError;
#[derive(Debug)]
pub enum RunnerStatus {
Pending,
Running,
Failed,
Success,
}
pub trait Runner {
fn run(&mut self);
fn set_status(&mut self, status: RunnerStatus);
}
pub trait Storer {
fn insert(&self) -> Result<(), StorerError>;
fn save(&self) -> Result<(), StorerError>;
fn delete(&self) -> Result<(), StorerError>;
}

View File

@ -1,84 +1,34 @@
use std::collections::VecDeque;
use std::sync::{Arc, Mutex, Condvar};
use std::sync::{Arc, Condvar, Mutex};
use std::thread;
use std::time;
use std::time::Duration;
use crate::message::Message;
use crate::model::*;
use crate::queue::QueueStatus;
struct Queue {
status: Mutex<QueueStatus>,
content: Mutex<VecDeque<Job>>,
struct Queue<T: Runner> {
content: Mutex<VecDeque<T>>,
not_empty: Condvar,
}
impl Queue {
impl<T: Runner> Queue<T> {
fn new() -> Self {
Self {
status: Mutex::new(QueueStatus::Pending),
content: Mutex::new(VecDeque::new()),
not_empty: Condvar::new(),
}
}
pub fn set_status(&mut self, status: QueueStatus) {
let mut s = self.status.lock().unwrap();
*s = status;
}
pub fn add_job(&self, job: Job) {
pub fn add_runner(&self, runner: T) {
let mut c = self.content.lock().unwrap();
c.push_back(job);
c.push_back(runner);
self.not_empty.notify_one();
}
}
#[derive(Copy, Clone)]
pub enum JobAction {
MegaportDeploy,
MegaportUndeploy,
MegaportCheckDeploy,
MegaportCheckUndeploy
}
pub struct Job {
id: u32,
action: JobAction,
data: String,
}
impl Job {
fn new(id: u32, action: JobAction, data: &str) -> Self {
Self {
id: id,
action: action,
data: data.to_string()
}
}
fn run(&self) {
let id = self.id.clone();
match self.action {
JobAction::MegaportDeploy => {
println!("[job({})] deploying megaport...", id);
},
JobAction::MegaportUndeploy => {
println!("[job({})] undeploying megaport...", id);
},
JobAction::MegaportCheckDeploy => {
println!("[job({})] ckecking megaport deployment...", id);
}
JobAction::MegaportCheckUndeploy => {
println!("[job({})] ckecking megaport undeployment...", id);
}
}
let wait = time::Duration::from_millis(1);
thread::sleep(wait);
}
}
#[derive(Copy, Clone, PartialEq)]
pub enum WorkerStatus {
Pending,
@ -112,11 +62,18 @@ pub struct Manager {
}
impl Manager {
fn new(name :&str) -> Self {
Self { name: name.to_string(), workers: vec![] }
fn new(name: &str) -> Self {
Self {
name: name.to_string(),
workers: vec![],
}
}
fn launch_workers(&mut self, nb_workers: u32, shared_queue: Arc<Queue>) {
fn launch_workers<T: Runner + std::marker::Send + 'static>(
&mut self,
nb_workers: u32,
shared_queue: Arc<Queue<T>>,
) {
for i in 0..nb_workers {
let shared_worker = Arc::new(Mutex::new(Worker::new()));
@ -126,31 +83,29 @@ impl Manager {
let queue = shared_queue.clone();
let name = self.name.clone();
thread::spawn(move || {
loop {
let mut c = queue.content.lock().unwrap();
thread::spawn(move || loop {
let mut guard = queue.content.lock().unwrap();
let job = loop {
if let Some(job) = c.pop_front() {
break job;
} else {
c = queue.not_empty.wait(c).unwrap();
}
};
let mut runner = loop {
if let Some(r) = guard.pop_front() {
break r;
} else {
guard = queue.not_empty.wait(guard).unwrap();
}
};
drop(c);
drop(guard);
let mut guard = worker.lock().unwrap();
guard.set_status(WorkerStatus::Running);
drop(guard);
let mut guard = worker.lock().unwrap();
guard.set_status(WorkerStatus::Running);
drop(guard);
println!("[worker({} - {})] launching job...", name, i);
job.run();
println!("[worker({} - {})] launching job...", name, i);
runner.run();
let mut guard = worker.lock().unwrap();
guard.set_status(WorkerStatus::Pending);
drop(guard);
}
let mut guard = worker.lock().unwrap();
guard.set_status(WorkerStatus::Pending);
drop(guard);
});
}
}
@ -158,11 +113,11 @@ impl Manager {
fn healthcheck(&self, target: WorkerStatus) -> bool {
for w in &self.workers {
if w.lock().unwrap().get_status() != target {
return false
return false;
}
}
true
}
}
}
#[test]
@ -171,18 +126,18 @@ fn test_manager() {
use std::time::Duration;
let mut m = Manager::new("deploy");
let queue_deploy = Arc::new(Queue::new());
let queue_check = Arc::new(Queue::new());
let queue_deploy = Arc::new(Queue::<Job>::new());
let queue_check = Arc::new(Queue::<Job>::new());
m.launch_workers(5, queue_deploy.clone());
assert_eq!(5, m.workers.len());
assert!(!m.healthcheck(WorkerStatus::Failed));
for i in 0..500 {
let j = Job::new(i, JobAction::MegaportDeploy, "");
let j = Job::new(i, JobAction::MegaportDeploy);
queue_deploy.add_job(j);
queue_deploy.add_runner(j);
}
let wait = time::Duration::from_millis(200);