131 lines
4.1 KiB
Rust
131 lines
4.1 KiB
Rust
//! Zebrad Abscissa Application
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use crate::{commands::ZebradCmd, config::ZebradConfig};
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use abscissa_core::{
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application, config, logging, Application, Component, EntryPoint, FrameworkError, StandardPaths,
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};
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use lazy_static::lazy_static;
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lazy_static! {
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/// Application state
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pub static ref APPLICATION: application::Lock<ZebradApp> = application::Lock::default();
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}
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/// Obtain a read-only (multi-reader) lock on the application state.
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///
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/// Panics if the application state has not been initialized.
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pub fn app_reader() -> application::lock::Reader<ZebradApp> {
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APPLICATION.read()
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}
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/// Obtain an exclusive mutable lock on the application state.
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pub fn app_writer() -> application::lock::Writer<ZebradApp> {
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APPLICATION.write()
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}
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/// Obtain a read-only (multi-reader) lock on the application configuration.
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///
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/// Panics if the application configuration has not been loaded.
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pub fn app_config() -> config::Reader<ZebradApp> {
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config::Reader::new(&APPLICATION)
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}
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/// Zebrad Application
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#[derive(Debug)]
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pub struct ZebradApp {
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/// Application configuration.
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config: Option<ZebradConfig>,
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/// Application state.
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state: application::State<Self>,
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}
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/// Initialize a new application instance.
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///
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/// By default no configuration is loaded, and the framework state is
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/// initialized to a default, empty state (no components, threads, etc).
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impl Default for ZebradApp {
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fn default() -> Self {
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Self {
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config: None,
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state: application::State::default(),
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}
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}
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}
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impl Application for ZebradApp {
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/// Entrypoint command for this application.
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type Cmd = EntryPoint<ZebradCmd>;
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/// Application configuration.
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type Cfg = ZebradConfig;
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/// Paths to resources within the application.
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type Paths = StandardPaths;
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/// Accessor for application configuration.
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fn config(&self) -> &ZebradConfig {
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self.config.as_ref().expect("config not loaded")
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}
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/// Borrow the application state immutably.
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fn state(&self) -> &application::State<Self> {
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&self.state
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}
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/// Borrow the application state mutably.
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fn state_mut(&mut self) -> &mut application::State<Self> {
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&mut self.state
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}
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/// Override the provided impl to skip the default logging component.
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///
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/// We want to use tracing as the log subscriber in our tracing component,
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/// so only initialize the abscissa Terminal component.
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fn framework_components(
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&mut self,
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_command: &Self::Cmd,
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) -> Result<Vec<Box<dyn Component<Self>>>, FrameworkError> {
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use abscissa_core::terminal::{component::Terminal, ColorChoice};
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// XXX abscissa uses self.term_colors(command), check if we should match
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let terminal = Terminal::new(ColorChoice::Auto);
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Ok(vec![Box::new(terminal)])
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}
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/// Register all components used by this application.
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///
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/// If you would like to add additional components to your application
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/// beyond the default ones provided by the framework, this is the place
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/// to do so.
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fn register_components(&mut self, command: &Self::Cmd) -> Result<(), FrameworkError> {
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use crate::components::{tokio::TokioComponent, tracing::TracingEndpoint};
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let mut components = self.framework_components(command)?;
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components.push(Box::new(TokioComponent::new()?));
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components.push(Box::new(TracingEndpoint::new()?));
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self.state.components.register(components)
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}
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/// Post-configuration lifecycle callback.
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///
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/// Called regardless of whether config is loaded to indicate this is the
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/// time in app lifecycle when configuration would be loaded if
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/// possible.
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fn after_config(&mut self, config: Self::Cfg) -> Result<(), FrameworkError> {
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// Configure components
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self.state.components.after_config(&config)?;
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self.config = Some(config);
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Ok(())
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}
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/// Get logging configuration from command-line options
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fn logging_config(&self, command: &EntryPoint<ZebradCmd>) -> logging::Config {
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if command.verbose {
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logging::Config::verbose()
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} else {
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logging::Config::default()
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}
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}
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}
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