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diff --git a/src/kernel.rs b/src/kernel.rs
new file mode 100644
--- /dev/null
+++ b/src/kernel.rs
@@ -0,0 +1,134 @@
+//! # API module
+//!
+//! Provides methods to start the server and handle the application
+
+use config::Config;
+use config::DefaultConfig;
+use database::initialize_database_pool;
+use database::test_database_connection;
+use ErrorResult;
+use rocket::Route;
+use rocket::ignite;
+use std::process;
+
+/* -------------------------------------------------------------
+ Application
+
+ Allow to define config and routes. Launch a server.
+ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
+
+pub trait Application {
+ fn get_config(&self) -> &dyn Config;
+
+ fn get_routes(&self) -> &[Route];
+
+ fn launch_server(&mut self) -> ErrorResult<()> {
+ let config = self.get_config();
+ let routes = self.get_routes();
+
+ ignite()
+ .manage(
+ initialize_database_pool(config.get_database_url(), config.get_database_pool_size())?
+ )
+ .mount(config.get_entry_point(), routes.to_vec())
+ .launch();
+
+ Ok(())
+ }
+
+ fn run (&mut self) -> ErrorResult<()> {
+ info!(target: "runner", "Server started.");
+
+ // Initial connection to test if the database configuration works
+ {
+ let config = self.get_config();
+ test_database_connection(config.get_database_url())?;
+ info!(target: "runner", "Connection to database established.");
+ }
+
+ self.launch_server()?;
+
+ Ok(())
+ }
+}
+
+/* -------------------------------------------------------------
+ Default application
+
+ :: Application
+ :: sui generis implementation
+ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
+
+/// The default application implements CLI program behavior to prepare a configuration from the
+/// `DefaultConfig` implementation, test if it's possible to connect to the database, and if so,
+/// launch a Rocket server.
+///
+/// # Examples
+///
+/// To run an application with some routes in a `requests` module:
+///
+/// ```
+/// use limiting_factor::kernel::DefaultApplication;
+/// use requests::*;
+///
+/// pub fn main () {
+/// let routes = routes![
+/// status,
+/// favicon,
+/// users::register,
+/// users::get_player,
+/// ];
+///
+/// DefaultApplication::start_application(routes);
+/// }
+/// ```
+///
+/// The default configuration will be used and the server started.
+pub struct DefaultApplication {
+ config: DefaultConfig,
+ routes: Box<Vec<Route>>,
+}
+
+impl Application for DefaultApplication {
+ fn get_config(&self) -> &dyn Config {
+ &self.config
+ }
+
+ fn get_routes(&self) -> &[Route] {
+ self.routes.as_slice()
+ }
+}
+
+impl DefaultApplication {
+ pub fn new (config: DefaultConfig, routes: Vec<Route>) -> Self {
+ DefaultApplication {
+ config,
+ routes: Box::new(routes),
+ }
+ }
+
+ /// Starts the application, prepares default configuration
+ ///
+ /// # Exit codes
+ ///
+ /// The software will exit with the following error codes:
+ /// 0: Exits gracefully (but currently we don't have a signal to ask the server to shutdown)
+ /// 1: Error during the application run (e.g. routes conflict or Rocket fairings issues)
+ /// 2: Error parsing the configuration (e.g. no database URL has been defined)
+ pub fn start_application (routes: Vec<Route>) {
+ info!(target: "runner", "Server initialized.");
+
+ let config = DefaultConfig::parse_environment().unwrap_or_else(|_error| {
+ process::exit(2);
+ });
+
+ let mut app = Self::new(config, routes);
+
+ if let Err(error) = app.run() {
+ error!(target: "runner", "{}", error.description());
+ process::exit(1);
+ }
+
+ process::exit(0);
+ }
+}
diff --git a/src/lib.rs b/src/lib.rs
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -12,6 +12,7 @@
pub mod api;
pub mod config;
pub mod database;
+pub mod kernel;
/* -------------------------------------------------------------
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