easy_logging/
context.rs

1use std::sync::Mutex;
2
3use lazy_static::lazy_static;
4use log::Level;
5
6lazy_static! {
7    static ref GLOBAL_CONTEXT: Mutex<Option<GlobalContextValue>> = Mutex::new(None);
8}
9
10pub struct GlobalContext {
11}
12
13impl GlobalContext {
14    pub fn new(name: &str) -> GlobalContext {
15        GlobalContext::new_conditional(Level::iter().next().unwrap(), name)
16    }
17
18    pub fn new_conditional(min_level: Level, name: &str) -> GlobalContext {
19        let message = format!("[{}] ", name);
20
21        {
22            let mut context = GLOBAL_CONTEXT.lock().unwrap();
23            if context.is_some() {
24                panic!("An attempt to set a nested global context");
25            }
26            context.replace(GlobalContextValue {
27                min_level,
28                message
29            });
30        }
31
32        GlobalContext{}
33    }
34
35    pub(crate) fn get(level: Level) -> String {
36        match GLOBAL_CONTEXT.lock().unwrap().as_ref() {
37            Some(context) if level >= context.min_level => context.message.clone(),
38            _ => String::new(),
39        }
40    }
41}
42
43impl Drop for GlobalContext {
44    fn drop(&mut self) {
45        *GLOBAL_CONTEXT.lock().unwrap() = None;
46    }
47}
48
49struct GlobalContextValue {
50    min_level: Level,
51    message: String,
52}
easy_logging/context.rs

easy_logging/
context.rs
