concurrent_tor 1.0.0

A comprehensive scraping runtime.
Documentation 
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use crate::{
    database::JobStatusDb,
    execution::{client::WorkerType, scheduler::PlatformT},
    Result,
};
use async_channel::Receiver;
use async_trait::async_trait;

#[derive(Debug, Clone, Copy)]
pub struct ProcessedJobInfo<P: PlatformT> {
    pub platform: P,
    pub status: JobStatusDb,
    pub worker_type: WorkerType,
    pub worker_id: u16,
    pub ts_start: quanta::Instant,
    pub ts_end: quanta::Instant,
    pub job_hash: u128,
    pub num_attempts: u32,
    pub max_attempts: u32,
}

impl<P> ProcessedJobInfo<P>
where
    P: PlatformT,
{
    pub fn new(
        platform: P,
        worker_type: WorkerType,
        worker_id: u16,
        ts_start: quanta::Instant,
        ts_end: quanta::Instant,
        job_hash: u128,
        status: JobStatusDb,
        num_attempts: u32,
        max_attempts: u32,
    ) -> Self {
        ProcessedJobInfo {
            platform,
            worker_type,
            worker_id,
            ts_start,
            ts_end,
            job_hash,
            status,
            num_attempts,
            max_attempts,
        }
    }
}

#[derive(Debug, Clone, Copy)]
pub struct BasicWorkerInfo<P: PlatformT> {
    pub platform: P,
    pub worker_type: WorkerType,
    pub worker_id: u16,
    pub ts: quanta::Instant,
}

impl<P> BasicWorkerInfo<P>
where
    P: PlatformT,
{
    pub fn new(platform: P, worker_type: WorkerType, worker_id: u16, ts: quanta::Instant) -> Self {
        BasicWorkerInfo {
            platform,
            worker_type,
            worker_id,
            ts,
        }
    }
}

#[derive(Debug, Clone, Copy)]
pub struct QueueJobInfo<P: PlatformT> {
    pub platform: P,
    pub job_status_db: JobStatusDb,
    pub ts: quanta::Instant,
    pub job_hash: u128,
    pub num_attempts: u32,
    pub max_attempts: u32,
}

impl<P> QueueJobInfo<P>
where
    P: PlatformT,
{
    pub fn new(
        platform: P,
        ts: quanta::Instant,
        job_hash: u128,
        job_status_db: JobStatusDb,
        num_attempts: u32,
        max_attempts: u32,
    ) -> Self {
        QueueJobInfo {
            platform,
            ts,
            job_hash,
            job_status_db,
            num_attempts,
            max_attempts,
        }
    }
}

#[derive(Debug, Clone, Copy)]
pub struct DequeueInfo {
    pub current_circulation: i32,
    pub scheduler_len: usize,
    pub http_chan_len: usize,
    pub headless_browser_chan_len: usize,
    pub headed_browser_chan_len: usize,
    pub ts: quanta::Instant,
}

impl DequeueInfo {
    pub fn new(
        current_circulation: i32,
        scheduler_len: usize,
        http_chan_len: usize,
        headless_browser_chan_len: usize,
        headed_browser_chan_len: usize,
        ts: quanta::Instant,
    ) -> Self {
        DequeueInfo {
            current_circulation,
            scheduler_len,
            http_chan_len,
            headless_browser_chan_len,
            headed_browser_chan_len,
            ts,
        }
    }
}

#[derive(Debug, Clone, Copy)]
pub enum Event<P: PlatformT> {
    ProcessedJob(ProcessedJobInfo<P>),
    WorkerRateLimited(BasicWorkerInfo<P>),
    WorkerRenewingClient(BasicWorkerInfo<P>),

    NewJob(QueueJobInfo<P>),
    CompletedJob(QueueJobInfo<P>),
    FailedJob(QueueJobInfo<P>),
    RetryJob(QueueJobInfo<P>),
    MaxAttemptsReached(QueueJobInfo<P>),

    BalanceCirculation(DequeueInfo),

    StopMonitor,
}

#[async_trait]
pub trait Monitor<P: PlatformT>: Send {
    async fn start(self, event_rx: Receiver<Event<P>>) -> Result<()>;
}

pub struct EmptyMonitor {}

impl EmptyMonitor {
    pub fn new() -> Self {
        EmptyMonitor {}
    }
}

#[async_trait]
impl<P> Monitor<P> for EmptyMonitor
where
    P: PlatformT,
{
    async fn start(self, event_rx: Receiver<Event<P>>) -> Result<()> {
        loop {
            if let Event::StopMonitor = event_rx.recv().await? {
                break;
            }
        }
        Ok(())
    }
}