863 lines
26 KiB
Rust
863 lines
26 KiB
Rust
//! Core configuration management functionality.
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use crate::{
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ConfigError, ConfigFormat, ConfigLoader, ConfigResult, ConfigValidator, ConfigWatcher,
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Environment, FeatureFlagManager, LoaderConfig, SecretManager, WatchEvent,
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};
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use dashmap::DashMap;
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use serde::{Deserialize, Serialize, de::DeserializeOwned};
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use std::collections::HashMap;
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use std::path::PathBuf;
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use std::sync::Arc;
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use std::time::Duration;
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use tokio::sync::{RwLock, broadcast};
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use tracing::{debug, error, info, warn};
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/// Configuration value that can hold different types.
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#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
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#[serde(untagged)]
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pub enum ConfigValue {
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String(String),
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Integer(i64),
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Float(f64),
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Boolean(bool),
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Array(Vec<ConfigValue>),
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Object(HashMap<String, ConfigValue>),
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Null,
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}
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impl ConfigValue {
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/// Convert to a specific type.
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pub fn try_into<T>(&self) -> ConfigResult<T>
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where
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T: DeserializeOwned,
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{
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let json_value = serde_json::to_value(self)?;
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serde_json::from_value(json_value)
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.map_err(|e| ConfigError::SerializationError { source: e })
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}
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/// Get the type name of this value.
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pub fn type_name(&self) -> &'static str {
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match self {
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ConfigValue::String(_) => "String",
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ConfigValue::Integer(_) => "Integer",
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ConfigValue::Float(_) => "Float",
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ConfigValue::Boolean(_) => "Boolean",
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ConfigValue::Array(_) => "Array",
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ConfigValue::Object(_) => "Object",
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ConfigValue::Null => "Null",
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}
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}
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/// Check if this value is null.
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pub fn is_null(&self) -> bool {
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matches!(self, ConfigValue::Null)
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}
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/// Get as string, converting if necessary.
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pub fn as_string(&self) -> ConfigResult<String> {
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match self {
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ConfigValue::String(s) => Ok(s.clone()),
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ConfigValue::Integer(i) => Ok(i.to_string()),
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ConfigValue::Float(f) => Ok(f.to_string()),
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ConfigValue::Boolean(b) => Ok(b.to_string()),
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_ => Err(ConfigError::type_mismatch("", "String", self.type_name())),
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}
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}
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/// Get as integer, converting if necessary.
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pub fn as_integer(&self) -> ConfigResult<i64> {
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match self {
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ConfigValue::Integer(i) => Ok(*i),
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ConfigValue::String(s) => s
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.parse()
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.map_err(|_| ConfigError::type_mismatch("", "Integer", "String")),
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_ => Err(ConfigError::type_mismatch("", "Integer", self.type_name())),
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}
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}
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/// Get as boolean, converting if necessary.
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pub fn as_boolean(&self) -> ConfigResult<bool> {
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match self {
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ConfigValue::Boolean(b) => Ok(*b),
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ConfigValue::String(s) => match s.to_lowercase().as_str() {
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"true" | "yes" | "1" | "on" => Ok(true),
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"false" | "no" | "0" | "off" => Ok(false),
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_ => Err(ConfigError::type_mismatch("", "Boolean", "String")),
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},
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ConfigValue::Integer(i) => Ok(*i != 0),
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_ => Err(ConfigError::type_mismatch("", "Boolean", self.type_name())),
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}
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}
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}
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/// Configuration source definition.
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#[derive(Debug, Clone)]
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pub enum ConfigSource {
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/// Load from environment variables
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Environment,
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/// Load from a file
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File {
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path: PathBuf,
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format: ConfigFormat,
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required: bool,
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},
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/// Load from remote URL
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Remote {
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url: Option<String>,
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headers: HashMap<String, String>,
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timeout: Duration,
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},
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/// Load from static values
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Static {
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values: HashMap<String, ConfigValue>,
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},
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}
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/// Runtime configuration with change notifications.
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#[derive(Debug, Clone)]
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pub struct RuntimeConfig {
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/// Configuration values
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values: Arc<DashMap<String, ConfigValue>>,
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/// Change notification broadcaster
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change_notifier: broadcast::Sender<ConfigChangeEvent>,
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/// Configuration metadata
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metadata: Arc<RwLock<ConfigMetadata>>,
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}
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/// Configuration change event.
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#[derive(Debug, Clone)]
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pub struct ConfigChangeEvent {
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/// The key that changed
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pub key: String,
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/// Old value (if any)
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pub old_value: Option<ConfigValue>,
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/// New value
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pub new_value: ConfigValue,
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/// Source of the change
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pub source: String,
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/// Timestamp of the change
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pub timestamp: chrono::DateTime<chrono::Utc>,
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}
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/// Configuration metadata.
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#[derive(Debug, Clone)]
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pub struct ConfigMetadata {
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/// When the configuration was last loaded
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pub last_loaded: chrono::DateTime<chrono::Utc>,
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/// Which sources were loaded successfully
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pub loaded_sources: Vec<String>,
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/// Load errors (non-fatal)
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pub load_errors: Vec<String>,
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/// Total number of configuration keys
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pub key_count: usize,
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}
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impl RuntimeConfig {
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/// Create a new runtime configuration.
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pub fn new() -> Self {
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let (change_notifier, _) = broadcast::channel(1000);
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Self {
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values: Arc::new(DashMap::new()),
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change_notifier,
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metadata: Arc::new(RwLock::new(ConfigMetadata {
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last_loaded: chrono::Utc::now(),
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loaded_sources: vec![],
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load_errors: vec![],
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key_count: 0,
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})),
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}
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}
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/// Get a configuration value by key.
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pub async fn get(&self, key: &str) -> ConfigResult<ConfigValue> {
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self.values
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.get(key)
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.map(|entry| entry.value().clone())
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.ok_or_else(|| ConfigError::key_not_found(key))
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}
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/// Get a typed configuration value.
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pub async fn get_typed<T>(&self, key: &str) -> ConfigResult<T>
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where
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T: DeserializeOwned,
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{
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let value = self.get(key).await?;
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ConfigValue::try_into::<T>(&value).map_err(|e| match e {
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ConfigError::SerializationError { .. } => {
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ConfigError::type_mismatch(key, std::any::type_name::<T>(), value.type_name())
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}
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other => other,
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})
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}
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/// Set a configuration value.
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pub async fn set(&self, key: &str, value: ConfigValue) -> ConfigResult<()> {
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let old_value = self.values.get(key).map(|entry| entry.value().clone());
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self.values.insert(key.to_string(), value.clone());
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// Update metadata
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{
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let mut metadata = self.metadata.write().await;
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metadata.key_count = self.values.len();
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}
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// Notify about the change
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let change_event = ConfigChangeEvent {
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key: key.to_string(),
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old_value,
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new_value: value,
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source: "manual".to_string(),
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timestamp: chrono::Utc::now(),
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};
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// Send notification (ignore errors if no listeners)
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let _ = self.change_notifier.send(change_event);
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Ok(())
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}
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/// Remove a configuration key.
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pub async fn remove(&self, key: &str) -> ConfigResult<Option<ConfigValue>> {
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let old_value = self.values.remove(key).map(|(_, v)| v);
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if let Some(ref value) = old_value {
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// Update metadata
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{
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let mut metadata = self.metadata.write().await;
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metadata.key_count = self.values.len();
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}
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// Notify about the change
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let change_event = ConfigChangeEvent {
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key: key.to_string(),
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old_value: Some(value.clone()),
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new_value: ConfigValue::Null,
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source: "manual".to_string(),
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timestamp: chrono::Utc::now(),
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};
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let _ = self.change_notifier.send(change_event);
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}
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Ok(old_value)
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}
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/// Get all configuration keys.
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pub async fn keys(&self) -> Vec<String> {
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self.values
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.iter()
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.map(|entry| entry.key().clone())
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.collect()
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}
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/// Check if a key exists.
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pub async fn contains_key(&self, key: &str) -> bool {
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self.values.contains_key(key)
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}
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/// Get configuration metadata.
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pub async fn metadata(&self) -> ConfigMetadata {
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self.metadata.read().await.clone()
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}
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/// Subscribe to configuration changes.
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pub fn subscribe_to_changes(&self) -> broadcast::Receiver<ConfigChangeEvent> {
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self.change_notifier.subscribe()
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}
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/// Merge values from another source.
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pub async fn merge(
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&self,
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values: HashMap<String, ConfigValue>,
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source: &str,
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) -> ConfigResult<()> {
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let mut changes = Vec::new();
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for (key, value) in values {
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let old_value = self.values.get(&key).map(|entry| entry.value().clone());
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self.values.insert(key.clone(), value.clone());
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changes.push(ConfigChangeEvent {
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key,
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old_value,
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new_value: value,
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source: source.to_string(),
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timestamp: chrono::Utc::now(),
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});
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}
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// Update metadata
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{
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let mut metadata = self.metadata.write().await;
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metadata.key_count = self.values.len();
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metadata.last_loaded = chrono::Utc::now();
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if !metadata.loaded_sources.contains(&source.to_string()) {
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metadata.loaded_sources.push(source.to_string());
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}
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}
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// Send all change notifications
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for change in changes {
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let _ = self.change_notifier.send(change);
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}
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Ok(())
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}
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/// Clear all configuration values.
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pub async fn clear(&self) -> ConfigResult<()> {
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self.values.clear();
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// Update metadata
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{
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let mut metadata = self.metadata.write().await;
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metadata.key_count = 0;
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}
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Ok(())
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}
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}
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impl Default for RuntimeConfig {
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fn default() -> Self {
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Self::new()
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}
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}
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/// Configuration manager builder.
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pub struct ConfigManagerBuilder {
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sources: Vec<ConfigSource>,
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hot_reload: bool,
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validation: bool,
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secret_management: bool,
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feature_flags: bool,
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environment: Option<Environment>,
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loader_config: LoaderConfig,
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}
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impl ConfigManagerBuilder {
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/// Create a new builder.
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pub fn new() -> Self {
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Self {
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sources: Vec::new(),
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hot_reload: false,
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validation: false,
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secret_management: false,
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feature_flags: false,
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environment: None,
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loader_config: LoaderConfig::default(),
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}
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}
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/// Add a configuration source.
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pub fn add_source(mut self, source: ConfigSource) -> Self {
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self.sources.push(source);
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self
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}
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/// Enable hot reloading.
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pub fn enable_hot_reload(mut self, enabled: bool) -> Self {
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self.hot_reload = enabled;
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self
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}
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/// Enable configuration validation.
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pub fn enable_validation(mut self, enabled: bool) -> Self {
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self.validation = enabled;
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self
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}
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/// Enable secret management.
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pub fn enable_secret_management(mut self, enabled: bool) -> Self {
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self.secret_management = enabled;
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self
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}
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/// Enable feature flags.
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pub fn enable_feature_flags(mut self, enabled: bool) -> Self {
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self.feature_flags = enabled;
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self
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}
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/// Set the environment.
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pub fn environment(mut self, env: Environment) -> Self {
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self.environment = Some(env);
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self
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}
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/// Set loader configuration.
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pub fn loader_config(mut self, config: LoaderConfig) -> Self {
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self.loader_config = config;
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self
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}
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/// Build the configuration manager.
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pub async fn build(self) -> ConfigResult<ConfigManager> {
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let runtime_config = Arc::new(RuntimeConfig::new());
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let loader = ConfigLoader::new(self.loader_config);
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let secret_manager = if self.secret_management {
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Some(Arc::new(SecretManager::new().await?))
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} else {
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None
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};
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let feature_flag_manager = if self.feature_flags {
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Some(Arc::new(FeatureFlagManager::new()))
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} else {
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None
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};
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let validator = if self.validation {
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Some(Arc::new(ConfigValidator::new()))
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} else {
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None
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};
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let watcher = if self.hot_reload {
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Some(Arc::new(ConfigWatcher::new(runtime_config.clone()).await?))
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} else {
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None
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};
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let manager = ConfigManager {
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runtime_config: runtime_config.clone(),
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sources: self.sources,
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loader,
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secret_manager,
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feature_flag_manager,
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validator,
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watcher,
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environment: self.environment.unwrap_or_default(),
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};
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// Load initial configuration
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manager.load_all_sources().await?;
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// Start watching for changes if enabled
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if let Some(ref watcher) = manager.watcher {
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manager.start_watching().await?;
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}
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Ok(manager)
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}
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}
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impl Default for ConfigManagerBuilder {
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fn default() -> Self {
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Self::new()
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}
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}
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/// Main configuration manager.
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pub struct ConfigManager {
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/// Runtime configuration
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runtime_config: Arc<RuntimeConfig>,
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/// Configuration sources
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sources: Vec<ConfigSource>,
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/// Configuration loader
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loader: ConfigLoader,
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/// Secret manager
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secret_manager: Option<Arc<SecretManager>>,
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/// Feature flag manager
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feature_flag_manager: Option<Arc<FeatureFlagManager>>,
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/// Configuration validator
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validator: Option<Arc<ConfigValidator>>,
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/// File watcher
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watcher: Option<Arc<ConfigWatcher>>,
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/// Current environment
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environment: Environment,
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}
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impl ConfigManager {
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/// Create a new builder.
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pub fn builder() -> ConfigManagerBuilder {
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ConfigManagerBuilder::new()
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}
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/// Get a configuration value.
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pub async fn get<T>(&self, key: &str) -> ConfigResult<T>
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where
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T: DeserializeOwned,
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{
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self.runtime_config.get_typed(key).await
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}
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/// Set a configuration value.
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pub async fn set(&self, key: &str, value: ConfigValue) -> ConfigResult<()> {
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// Validate the value if validation is enabled
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if let Some(ref validator) = self.validator {
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validator.validate_value(key, &value).await?;
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}
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self.runtime_config.set(key, value).await
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}
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/// Remove a configuration key.
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pub async fn remove(&self, key: &str) -> ConfigResult<Option<ConfigValue>> {
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self.runtime_config.remove(key).await
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}
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/// Check if a key exists.
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pub async fn contains_key(&self, key: &str) -> bool {
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self.runtime_config.contains_key(key).await
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}
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/// Get all configuration keys.
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pub async fn keys(&self) -> Vec<String> {
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self.runtime_config.keys().await
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}
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/// Subscribe to configuration changes.
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pub fn subscribe_to_changes(&self) -> broadcast::Receiver<ConfigChangeEvent> {
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self.runtime_config.subscribe_to_changes()
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}
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/// Get configuration metadata.
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pub async fn metadata(&self) -> ConfigMetadata {
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self.runtime_config.metadata().await
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}
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/// Reload configuration from all sources.
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pub async fn reload(&self) -> ConfigResult<()> {
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info!("Reloading configuration from all sources");
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self.load_all_sources().await
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}
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/// Get the secret manager.
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pub fn secret_manager(&self) -> Option<&Arc<SecretManager>> {
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self.secret_manager.as_ref()
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}
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/// Get the feature flag manager.
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pub fn feature_flag_manager(&self) -> Option<&Arc<FeatureFlagManager>> {
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self.feature_flag_manager.as_ref()
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}
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/// Check if hot reload is enabled.
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pub fn is_hot_reload_enabled(&self) -> bool {
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self.watcher.is_some()
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}
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/// Get the current environment.
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pub fn environment(&self) -> &Environment {
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&self.environment
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}
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/// Load configuration from all sources.
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async fn load_all_sources(&self) -> ConfigResult<()> {
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debug!("Loading configuration from {} sources", self.sources.len());
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for source in &self.sources {
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if let Err(e) = self.load_source(source).await {
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match source {
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ConfigSource::File { required: true, .. } => {
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error!("Failed to load required configuration source: {}", e);
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return Err(e);
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}
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_ => {
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warn!("Failed to load optional configuration source: {}", e);
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// Continue with other sources
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}
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}
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}
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}
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info!("Configuration loaded successfully");
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Ok(())
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}
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/// Load configuration from a single source.
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async fn load_source(&self, source: &ConfigSource) -> ConfigResult<()> {
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let values = match source {
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ConfigSource::Environment => {
|
|
debug!("Loading configuration from environment variables");
|
|
self.loader.load_environment().await?
|
|
}
|
|
ConfigSource::File { path, format, .. } => {
|
|
debug!("Loading configuration from file: {}", path.display());
|
|
self.loader.load_file(path, *format).await?
|
|
}
|
|
ConfigSource::Remote {
|
|
url: Some(url),
|
|
headers,
|
|
timeout,
|
|
} => {
|
|
debug!("Loading configuration from remote URL: {}", url);
|
|
self.loader
|
|
.load_remote(url, headers.clone(), *timeout)
|
|
.await?
|
|
}
|
|
ConfigSource::Remote { url: None, .. } => {
|
|
debug!("Skipping remote configuration (no URL provided)");
|
|
return Ok(());
|
|
}
|
|
ConfigSource::Static { values } => {
|
|
debug!("Loading static configuration values");
|
|
values.clone()
|
|
}
|
|
};
|
|
|
|
let source_name = match source {
|
|
ConfigSource::Environment => "environment".to_string(),
|
|
ConfigSource::File { path, .. } => format!("file:{}", path.display()),
|
|
ConfigSource::Remote { url: Some(url), .. } => format!("remote:{}", url),
|
|
ConfigSource::Remote { .. } => "remote:none".to_string(),
|
|
ConfigSource::Static { .. } => "static".to_string(),
|
|
};
|
|
|
|
self.runtime_config.merge(values, &source_name).await?;
|
|
Ok(())
|
|
}
|
|
|
|
/// Start watching for configuration changes.
|
|
async fn start_watching(&self) -> ConfigResult<()> {
|
|
if let Some(ref watcher) = self.watcher {
|
|
// Watch file sources
|
|
for source in &self.sources {
|
|
if let ConfigSource::File { path, .. } = source {
|
|
watcher.watch_file(path).await?;
|
|
}
|
|
}
|
|
|
|
// Set up change handler
|
|
let manager = self.clone();
|
|
let mut receiver = watcher.subscribe();
|
|
|
|
tokio::spawn(async move {
|
|
while let Ok(event) = receiver.recv().await {
|
|
if let Err(e) = manager.handle_watch_event(event).await {
|
|
error!("Failed to handle configuration change: {}", e);
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
|
|
/// Handle a file watch event.
|
|
async fn handle_watch_event(&self, event: WatchEvent) -> ConfigResult<()> {
|
|
match event {
|
|
WatchEvent::Modified { path } => {
|
|
info!("Configuration file modified: {}", path.display());
|
|
|
|
// Find the corresponding source and reload it
|
|
for source in &self.sources {
|
|
if let ConfigSource::File {
|
|
path: source_path, ..
|
|
} = source
|
|
{
|
|
if source_path == &path {
|
|
self.load_source(source).await?;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
WatchEvent::Deleted { path } => {
|
|
warn!("Configuration file deleted: {}", path.display());
|
|
// Handle file deletion - might want to clear related config or use defaults
|
|
}
|
|
WatchEvent::Error { error } => {
|
|
error!("Configuration watcher error: {}", error);
|
|
}
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
impl Clone for ConfigManager {
|
|
fn clone(&self) -> Self {
|
|
Self {
|
|
runtime_config: self.runtime_config.clone(),
|
|
sources: self.sources.clone(),
|
|
loader: self.loader.clone(),
|
|
secret_manager: self.secret_manager.clone(),
|
|
feature_flag_manager: self.feature_flag_manager.clone(),
|
|
validator: self.validator.clone(),
|
|
watcher: self.watcher.clone(),
|
|
environment: self.environment.clone(),
|
|
}
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
use std::io::Write;
|
|
use tempfile::NamedTempFile;
|
|
|
|
#[tokio::test]
|
|
async fn test_runtime_config_basic_operations() {
|
|
let config = RuntimeConfig::new();
|
|
|
|
// Test set and get
|
|
config
|
|
.set("test.string", ConfigValue::String("hello".to_string()))
|
|
.await
|
|
.unwrap();
|
|
config
|
|
.set("test.number", ConfigValue::Integer(42))
|
|
.await
|
|
.unwrap();
|
|
config
|
|
.set("test.boolean", ConfigValue::Boolean(true))
|
|
.await
|
|
.unwrap();
|
|
|
|
let string_value = config.get_typed::<String>("test.string").await.unwrap();
|
|
assert_eq!(string_value, "hello");
|
|
|
|
let number_value = config.get_typed::<i64>("test.number").await.unwrap();
|
|
assert_eq!(number_value, 42);
|
|
|
|
let bool_value = config.get_typed::<bool>("test.boolean").await.unwrap();
|
|
assert!(bool_value);
|
|
|
|
// Test key existence
|
|
assert!(config.contains_key("test.string").await);
|
|
assert!(!config.contains_key("nonexistent").await);
|
|
|
|
// Test keys
|
|
let keys = config.keys().await;
|
|
assert!(keys.contains(&"test.string".to_string()));
|
|
assert!(keys.contains(&"test.number".to_string()));
|
|
assert!(keys.contains(&"test.boolean".to_string()));
|
|
}
|
|
|
|
#[tokio::test]
|
|
async fn test_config_value_conversions() {
|
|
let string_val = ConfigValue::String("42".to_string());
|
|
assert_eq!(string_val.as_integer().unwrap(), 42);
|
|
|
|
let bool_string = ConfigValue::String("true".to_string());
|
|
assert!(bool_string.as_boolean().unwrap());
|
|
|
|
let int_val = ConfigValue::Integer(1);
|
|
assert!(int_val.as_boolean().unwrap());
|
|
|
|
let zero_val = ConfigValue::Integer(0);
|
|
assert!(!zero_val.as_boolean().unwrap());
|
|
}
|
|
|
|
#[tokio::test]
|
|
async fn test_change_notifications() {
|
|
let config = RuntimeConfig::new();
|
|
let mut receiver = config.subscribe_to_changes();
|
|
|
|
// Set a value in a separate task
|
|
let config_clone = config.clone();
|
|
tokio::spawn(async move {
|
|
tokio::time::sleep(Duration::from_millis(10)).await;
|
|
config_clone
|
|
.set("test.key", ConfigValue::String("value".to_string()))
|
|
.await
|
|
.unwrap();
|
|
});
|
|
|
|
// Receive the change notification
|
|
let change_event = tokio::time::timeout(Duration::from_millis(100), receiver.recv())
|
|
.await
|
|
.unwrap()
|
|
.unwrap();
|
|
|
|
assert_eq!(change_event.key, "test.key");
|
|
assert_eq!(
|
|
change_event.new_value,
|
|
ConfigValue::String("value".to_string())
|
|
);
|
|
assert!(change_event.old_value.is_none());
|
|
}
|
|
|
|
#[tokio::test]
|
|
async fn test_config_manager_builder() {
|
|
let manager = ConfigManager::builder()
|
|
.add_source(ConfigSource::Environment)
|
|
.enable_hot_reload(false)
|
|
.enable_validation(true)
|
|
.build()
|
|
.await
|
|
.unwrap();
|
|
|
|
assert!(!manager.is_hot_reload_enabled());
|
|
assert_eq!(manager.sources.len(), 1);
|
|
}
|
|
|
|
#[tokio::test]
|
|
async fn test_config_from_file() {
|
|
let mut temp_file = NamedTempFile::new().unwrap();
|
|
writeln!(
|
|
temp_file,
|
|
r#"
|
|
database_url = "postgres://localhost/test"
|
|
port = 8080
|
|
debug = true
|
|
"#
|
|
)
|
|
.unwrap();
|
|
|
|
let manager = ConfigManager::builder()
|
|
.add_source(ConfigSource::File {
|
|
path: temp_file.path().to_path_buf(),
|
|
format: ConfigFormat::Toml,
|
|
required: true,
|
|
})
|
|
.build()
|
|
.await
|
|
.unwrap();
|
|
|
|
let database_url = manager.get::<String>("database_url").await.unwrap();
|
|
assert_eq!(database_url, "postgres://localhost/test");
|
|
|
|
let port = manager.get::<i64>("port").await.unwrap();
|
|
assert_eq!(port, 8080);
|
|
|
|
let debug = manager.get::<bool>("debug").await.unwrap();
|
|
assert!(debug);
|
|
}
|
|
|
|
#[tokio::test]
|
|
async fn test_static_config_source() {
|
|
let mut static_values = HashMap::new();
|
|
static_values.insert(
|
|
"app.name".to_string(),
|
|
ConfigValue::String("TestApp".to_string()),
|
|
);
|
|
static_values.insert(
|
|
"app.version".to_string(),
|
|
ConfigValue::String("1.0.0".to_string()),
|
|
);
|
|
|
|
let manager = ConfigManager::builder()
|
|
.add_source(ConfigSource::Static {
|
|
values: static_values,
|
|
})
|
|
.build()
|
|
.await
|
|
.unwrap();
|
|
|
|
let app_name = manager.get::<String>("app.name").await.unwrap();
|
|
assert_eq!(app_name, "TestApp");
|
|
|
|
let app_version = manager.get::<String>("app.version").await.unwrap();
|
|
assert_eq!(app_version, "1.0.0");
|
|
}
|
|
|
|
#[test]
|
|
fn test_config_value_type_name() {
|
|
assert_eq!(
|
|
ConfigValue::String("test".to_string()).type_name(),
|
|
"String"
|
|
);
|
|
assert_eq!(ConfigValue::Integer(42).type_name(), "Integer");
|
|
assert_eq!(ConfigValue::Boolean(true).type_name(), "Boolean");
|
|
assert_eq!(ConfigValue::Null.type_name(), "Null");
|
|
}
|
|
}
|