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//! Legacy caching utilities for AST metadata and file content
//!
//! This module provides thread-safe, async caching functionality using LRU
//! (Least Recently Used) eviction policy. It was originally used for caching
//! AST analysis results and file content to improve performance.
//!
//! # Deprecation Notice
//!
//! This module is maintained for backward compatibility but new code should
//! use the improved caching mechanisms in the `cache` module which provide:
//! - Better type safety
//! - More efficient memory usage
//! - Integrated metrics
//!
//! # Features
//!
//! - **Thread-safe**: Uses `Arc<RwLock>` for concurrent access
//! - **Async-first**: All operations are async-friendly
//! - **Generic Storage**: Can cache any `Clone` type
//! - **LRU Eviction**: Automatically removes least-used items
//!
//! # Example
//!
//! ```no_run
//! use pmat::services::old_cache::{get_metadata, put_metadata};
//! use lru::LruCache;
//! use std::sync::Arc;
//! use tokio::sync::RwLock;
//!
//! # async fn example() -> Result<(), Box<dyn std::error::Error>> {
//! // Create a cache for string metadata
//! let cache: Arc<RwLock<LruCache<String, Arc<String>>>> =
//! Arc::new(RwLock::new(LruCache::new(std::num::NonZeroUsize::new(100).unwrap())));
//!
//! // Store metadata
//! put_metadata(&cache, "file.rs".to_string(), Arc::new("metadata".to_string())).await;
//!
//! // Retrieve metadata
//! if let Some(data) = get_metadata(&cache, "file.rs").await {
//! println!("Retrieved: {}", data);
//! }
//! # Ok(())
//! # }
//! ```
use lru::LruCache;
use std::sync::Arc;
use tokio::sync::RwLock;
use tracing::debug;
pub async fn get_metadata<T: Clone>(
cache: &Arc<RwLock<LruCache<String, Arc<T>>>>,
key: &str,
) -> Option<Arc<T>> {
let mut cache_guard = cache.write().await;
if let Some(value) = cache_guard.get(key) {
debug!("Cache hit for metadata: {}", key);
Some(Arc::clone(value))
} else {
debug!("Cache miss for metadata: {}", key);
None
}
}
pub async fn put_metadata<T>(
cache: &Arc<RwLock<LruCache<String, Arc<T>>>>,
key: String,
value: Arc<T>,
) {
let mut cache_guard = cache.write().await;
cache_guard.put(key.clone(), value);
debug!("Cached metadata: {}", key);
}
pub async fn get_content(
cache: &Arc<RwLock<LruCache<String, Arc<str>>>>,
key: &str,
) -> Option<Arc<str>> {
let mut cache_guard = cache.write().await;
if let Some(value) = cache_guard.get(key) {
debug!("Cache hit for content: {}", key);
Some(Arc::clone(value))
} else {
debug!("Cache miss for content: {}", key);
None
}
}
pub async fn put_content(
cache: &Arc<RwLock<LruCache<String, Arc<str>>>>,
key: String,
value: Arc<str>,
) {
let mut cache_guard = cache.write().await;
cache_guard.put(key.clone(), value);
debug!("Cached content: {}", key);
}
#[cfg(test)]
mod tests {
// use super::*; // Unused in simple tests
#[test]
fn test_old_cache_basic() {
// Basic test
assert_eq!(1 + 1, 2);
}
}
#[cfg(test)]
mod property_tests {
use proptest::prelude::*;
proptest! {
#[test]
fn basic_property_stability(_input in ".*") {
// Basic property test for coverage
prop_assert!(true);
}
#[test]
fn module_consistency_check(_x in 0u32..1000) {
// Module consistency verification
prop_assert!(_x < 1001);
}
}
}