Release: NX9-Auth v0.3.0

src/runtime/builder.rs

@@ -0,0 +1,41 @@
+//! Application builder helpers.
+
+use crate::config::Config;
+
+use super::{Application, Lifecycle};
+
+/// Small builder façade over the runtime application container.
+#[derive(Default)]
+pub struct ApplicationBuilder {
+    config: Option<Config>,
+    application: Option<Application>,
+}
+
+impl ApplicationBuilder {
+    /// Create a new builder instance.
+    pub fn new() -> Self {
+        Self::default()
+    }
+
+    /// Attach config used to initialize the application.
+    pub fn with_config(mut self, config: Config) -> Self {
+        self.config = Some(config);
+        self
+    }
+
+    /// Override the application instance before building.
+    pub fn with_application(mut self, application: Application) -> Self {
+        self.application = Some(application);
+        self
+    }
+
+    /// Build the runtime application.
+    pub async fn build(self) -> anyhow::Result<Application> {
+        let mut application = self.application.unwrap_or_default();
+        if let Some(config) = self.config {
+            application.config = Some(config);
+        }
+        application.initialize().await?;
+        Ok(application)
+    }
+}