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/*
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* Created on Thu Jul 02 2020
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*
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* This file is a part of Skytable
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* Skytable (formerly known as TerrabaseDB or Skybase) is a free and open-source
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* NoSQL database written by Sayan Nandan ("the Author") with the
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* vision to provide flexibility in data modelling without compromising
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* on performance, queryability or scalability.
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*
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* Copyright (c) 2020, Sayan Nandan <ohsayan@outlook.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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//! # Skytable
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//!
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//! The `skyd` crate (or the `server` folder) is Skytable's database server and maybe
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//! is the most important part of the project. There are several modules within this crate; see
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//! the modules for their respective documentation.
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use crate::config::BGSave;
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use crate::config::PortConfig;
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use crate::config::SnapshotConfig;
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use std::io::{self, prelude::*};
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mod config;
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use std::env;
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mod admin;
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mod coredb;
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mod dbnet;
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mod diskstore;
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mod kvengine;
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mod protocol;
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mod queryengine;
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mod resp;
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use coredb::CoreDB;
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use dbnet::run;
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use env_logger::*;
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use libsky::util::terminal;
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use std::sync::Arc;
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use tokio::signal;
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#[cfg(test)]
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mod tests;
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#[cfg(not(target_env = "msvc"))]
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use jemallocator::Jemalloc;
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#[cfg(not(target_env = "msvc"))]
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#[global_allocator]
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/// Jemallocator - this is the default memory allocator for platforms other than msvc
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static GLOBAL: Jemalloc = Jemalloc;
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/// The version text
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static MSG: &'static str = "Skytable v0.6.0 | https://github.com/skytable/skytable";
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/// The terminal art for `!noart` configurations
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static TEXT: &'static str = "\n███████ ██ ██ ██ ██ ████████ █████ ██████ ██ ███████ \n██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ \n███████ █████ ████ ██ ███████ ██████ ██ █████ \n ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ \n███████ ██ ██ ██ ██ ██ ██ ██████ ███████ ███████ \n ";
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fn main() {
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Builder::new()
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.parse_filters(&env::var("SKY_LOG").unwrap_or("info".to_owned()))
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.init();
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// Start the server which asynchronously waits for a CTRL+C signal
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// which will safely shut down the server
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let runtime = tokio::runtime::Builder::new_multi_thread()
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.thread_name("server")
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.enable_all()
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.build()
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.unwrap();
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let (db, mut lock) = runtime.block_on(async {
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let (tcplistener, bgsave_config, snapshot_config, restore_filepath) =
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check_args_and_get_cfg().await;
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let (db, lock) = run(
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tcplistener,
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bgsave_config,
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snapshot_config,
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signal::ctrl_c(),
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restore_filepath,
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)
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.await;
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(db, lock)
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});
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// Make sure all background workers terminate
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drop(runtime);
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assert_eq!(
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Arc::strong_count(&db.shared),
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1,
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"Maybe the compiler reordered the drop causing more than one instance of CoreDB to live at this point"
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);
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if let Err(e) = flush_db!(db, lock) {
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log::error!("Failed to flush data to disk with '{}'", e);
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loop {
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// Keep looping until we successfully write the in-memory table to disk
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log::warn!("Press enter to try again...");
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io::stdout().flush().unwrap();
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io::stdin().read(&mut [0]).unwrap();
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if let Ok(_) = flush_db!(db, lock) {
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log::info!("Successfully saved data to disk");
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break;
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} else {
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continue;
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}
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}
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} else {
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log::info!("Successfully saved data to disk");
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}
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terminal::write_info("Goodbye :)\n").unwrap();
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}
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/// This function checks the command line arguments and either returns a config object
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/// or prints an error to `stderr` and terminates the server
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async fn check_args_and_get_cfg() -> (PortConfig, BGSave, SnapshotConfig, Option<String>) {
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let cfg = config::get_config_file_or_return_cfg();
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let binding_and_cfg = match cfg {
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Ok(config::ConfigType::Custom(cfg, file)) => {
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if cfg.is_artful() {
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println!("{}\n{}", MSG, TEXT);
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} else {
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println!("{}", MSG);
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}
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log::info!("Using settings from supplied configuration");
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(cfg.ports, cfg.bgsave, cfg.snapshot, file)
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}
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Ok(config::ConfigType::Def(cfg, file)) => {
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println!("{}\n{}", MSG, TEXT);
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log::warn!("No configuration file supplied. Using default settings");
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(cfg.ports, cfg.bgsave, cfg.snapshot, file)
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}
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Err(e) => {
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log::error!("{}", e);
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std::process::exit(0x100);
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}
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};
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binding_and_cfg
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}
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