delphi 0.0.5

Oracle feeder service (presently supporting Terra)
Documentation 
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//! Delphi Application

use crate::{commands::DelphiCmd, config::DelphiConfig};
use abscissa_core::{
    application::{self, AppCell},
    config::{self, CfgCell},
    trace, Application, EntryPoint, FrameworkError, StandardPaths,
};

/// Application state
pub static APP: AppCell<DelphiApp> = AppCell::new();

/// Delphi Application
#[derive(Debug)]
pub struct DelphiApp {
    /// Application configuration.
    config: CfgCell<DelphiConfig>,

    /// Application state.
    state: application::State<Self>,
}

/// Initialize a new application instance.
///
/// By default no configuration is loaded, and the framework state is
/// initialized to a default, empty state (no components, threads, etc).
impl Default for DelphiApp {
    fn default() -> Self {
        Self {
            config: CfgCell::default(),
            state: application::State::default(),
        }
    }
}

impl Application for DelphiApp {
    /// Entrypoint command for this application.
    type Cmd = EntryPoint<DelphiCmd>;

    /// Application configuration.
    type Cfg = DelphiConfig;

    /// Paths to resources within the application.
    type Paths = StandardPaths;

    /// Accessor for application configuration.
    fn config(&self) -> config::Reader<DelphiConfig> {
        self.config.read()
    }

    /// Borrow the application state immutably.
    fn state(&self) -> &application::State<Self> {
        &self.state
    }

    /// Register all components used by this application.
    fn register_components(&mut self, command: &Self::Cmd) -> Result<(), FrameworkError> {
        let mut components = self.framework_components(command)?;
        components.push(Box::new(abscissa_tokio::TokioComponent::new()?));
        let mut component_registry = self.state.components_mut();
        component_registry.register(components)
    }

    /// Post-configuration lifecycle callback.
    fn after_config(&mut self, config: Self::Cfg) -> Result<(), FrameworkError> {
        // Configure components
        let mut component_registry = self.state.components_mut();
        component_registry.after_config(&config)?;
        self.config.set_once(config);
        Ok(())
    }

    /// Get tracing configuration from command-line options
    fn tracing_config(&self, command: &EntryPoint<DelphiCmd>) -> trace::Config {
        if command.verbose {
            trace::Config::verbose()
        } else {
            trace::Config::default()
        }
    }
}