serwus 0.2.3

Helpers for building actix-web/diesel based services
Documentation 
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#[cfg(any(feature = "pgsql", feature = "mysql"))]
use log::info;

use actix_web::Error;
use futures::future::{Future, ok as fut_ok};
use serde::Serialize;
use std::pin::Pin;

#[cfg(any(feature = "pgsql", feature = "mysql"))]
use crate::db_pool;

#[cfg(feature = "prometheus")]
use super::prometheus::AsPrometheus;

use super::stats::StatsPresenter;

/// AppData ready to use if you need only default database connection.
#[derive(Clone)]
pub struct DefaultAppData {
    #[cfg(any(feature = "pgsql", feature = "mysql"))]
    pub db_pool: db_pool::Pool,
}

#[cfg(any(feature = "pgsql", feature = "mysql"))]
pub fn default_app_data() -> DefaultAppData {
    info!("Connecting to database");
    let db_pool = db_pool::init_default_pool().unwrap();

    DefaultAppData { db_pool }
}

#[cfg(all(not(feature = "pgsql"), not(feature = "mysql")))]
pub fn default_app_data() -> DefaultAppData {
    DefaultAppData {}
}

#[derive(Serialize)]
pub struct DefaultServiceStats {
    #[cfg(any(feature = "pgsql", feature = "mysql"))]
    db_connection: bool,
}

impl StatsPresenter<DefaultServiceStats> for DefaultAppData {
    fn is_ready(&self) -> Pin<Box<dyn Future<Output = Result<bool, Error>>>> {
        #[cfg(any(feature = "pgsql", feature = "mysql"))]
        let res = self.db_pool.get().is_ok();

        #[cfg(all(not(feature = "pgsql"), not(feature = "mysql")))]
        let res = false;

        Box::pin(fut_ok(res))
    }

    fn get_stats(&self) -> Pin<Box<dyn Future<Output = Result<DefaultServiceStats, Error>>>> {
        #[cfg(any(feature = "pgsql", feature = "mysql"))]
        let db_connection = self.db_pool.get().is_ok();

        let fut = fut_ok(DefaultServiceStats {
            #[cfg(any(feature = "pgsql", feature = "mysql"))]
            db_connection,
        });

        Box::pin(fut)
    }
}

#[cfg(feature = "prometheus")]
impl AsPrometheus for DefaultServiceStats {
    fn as_prometheus(&self) -> Vec<String> {
        #![allow(clippy::vec_init_then_push)]
        let mut out = Vec::new();
        #[cfg(any(feature = "pgsql", feature = "mysql"))]
        out.push(format!("db_connection {}", self.db_connection as i32));
        out
    }
}