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use core::*;
use std::sync::RwLock;
pub fn to_stdout() -> Chain<String> {
Chain::new(
|_kind, name, _rate| String::from(name),
|buffered| {
if !buffered {
ControlScopeFn::new(|cmd| {
if let ScopeCmd::Write(m, v) = cmd {
println!("{}: {}", m, v)
}
})
} else {
let buf = RwLock::new(String::new());
ControlScopeFn::new(move |cmd| {
let mut buf = buf.write().expect("Locking stdout buffer");
match cmd {
ScopeCmd::Write(metric, value) => buf.push_str(format!("{}: {}\n", metric, value).as_ref()),
ScopeCmd::Flush => {
println!("{}", buf);
buf.clear();
}
}
})
}
},
)
}
pub fn to_log() -> Chain<String> {
Chain::new(
|_kind, name, _rate| String::from(name),
|buffered| {
if !buffered {
ControlScopeFn::new(|cmd| {
if let ScopeCmd::Write(m, v) = cmd {
info!("{}: {}", m, v)
}
})
} else {
let buf = RwLock::new(String::new());
ControlScopeFn::new(move |cmd| {
let mut buf = buf.write().expect("Locking string buffer");
match cmd {
ScopeCmd::Write(metric, value) => buf.push_str(format!("{}: {}\n", metric, value).as_ref()),
ScopeCmd::Flush => {
info!("{}", buf);
buf.clear();
}
}
})
}
},
)
}
pub fn to_void() -> Chain<String> {
Chain::new(
move |_kind, name, _rate| String::from(name),
|_buffered| ControlScopeFn::new(|_cmd| {}),
)
}
#[cfg(test)]
mod test {
use core::*;
#[test]
fn sink_print() {
let c = super::to_stdout();
let m = c.define_metric(Kind::Marker, "test", 1.0);
c.open_scope(true).write(&m, 33);
}
#[test]
fn test_to_log() {
let c = super::to_log();
let m = c.define_metric(Kind::Marker, "test", 1.0);
c.open_scope(true).write(&m, 33);
}
#[test]
fn test_to_void() {
let c = super::to_void();
let m = c.define_metric(Kind::Marker, "test", 1.0);
c.open_scope(true).write(&m, 33);
}
}