idem_handler_config/
config_cache.rs

1use dashmap::DashMap;
2use once_cell::sync::Lazy;
3use std::sync::Arc;
4use std::fs;
5
6static FILE_CACHE: Lazy<DashMap<String, Arc<String>>> = Lazy::new(DashMap::new);
7
8pub fn get_file(file_path: &str) -> Result<Arc<String>, String> {
9    if let Some(contents) = FILE_CACHE.get(file_path) {
10        return Ok(contents.clone());
11    }
12    let contents = Arc::new(
13        fs::read_to_string(file_path)
14            .map_err(|e| format!("Failed to read file: {}", e))?,
15    );
16    FILE_CACHE.insert(file_path.to_string(), contents.clone());
17    Ok(contents)
18}
19
20pub fn init_or_replace_config(file_path: &str) -> Result<(), String> {
21    let contents = Arc::new(
22        fs::read_to_string(file_path)
23            .map_err(|e| format!("Failed to read file: {}", e))?,
24    );
25    FILE_CACHE.insert(file_path.to_string(), contents);
26    Ok(())
27}
28
29pub fn clear_cache() {
30    FILE_CACHE.clear();
31}
32
33#[cfg(test)]
34mod test {
35    use crate::config_cache::{clear_cache, get_file};
36    use std::sync::Arc;
37
38    #[test]
39    fn test_cache() {
40        let file_arc1 = get_file("./test/test.file").unwrap();
41        let file_arc2 = get_file("./test/test.file").unwrap();
42        assert!(Arc::ptr_eq(&file_arc1, &file_arc2));
43
44        clear_cache();
45        let file_arc3 = get_file("./test/test.file").unwrap();
46        assert!(!Arc::ptr_eq(&file_arc1, &file_arc3));
47    }
48}
idem_handler_config/config_cache.rs

idem_handler_config/
config_cache.rs
