barter 0.12.4

Framework for building high-performance live-trading, paper-trading and back-testing systems
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56

use crate::engine::audit::state_replica::AUDIT_REPLICA_STATE_UPDATE_SPAN_NAME;
use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt};

/// Initialise default non-JSON `Barter` logging.
///
/// Note that this filters out duplicate logs produced by the `AuditManager` updating its replica
/// `EngineState`.
pub fn init_logging() {
    tracing_subscriber::registry()
        .with(
            tracing_subscriber::filter::EnvFilter::builder()
                .with_default_directive(tracing_subscriber::filter::LevelFilter::INFO.into())
                .from_env_lossy(),
        )
        .with(tracing_subscriber::fmt::layer())
        .with(AuditSpanFilter)
        .init()
}

/// Initialise default JSON `Barter` logging.
///
/// Note that this filters out duplicate logs produced by the `AuditManager` updating its replica
/// `EngineState`.
pub fn init_json_logging() {
    tracing_subscriber::registry()
        .with(
            tracing_subscriber::filter::EnvFilter::builder()
                .with_default_directive(tracing_subscriber::filter::LevelFilter::INFO.into())
                .from_env_lossy(),
        )
        .with(tracing_subscriber::fmt::layer().json().flatten_event(true))
        .with(AuditSpanFilter)
        .init()
}

#[derive(Debug)]
pub struct AuditSpanFilter;

impl<S> tracing_subscriber::layer::Layer<S> for AuditSpanFilter
where
    S: tracing::Subscriber + for<'a> tracing_subscriber::registry::LookupSpan<'a>,
{
    fn event_enabled(
        &self,
        _: &tracing::Event<'_>,
        ctx: tracing_subscriber::layer::Context<'_, S>,
    ) -> bool {
        if let Some(span) = ctx.lookup_current()
            && span.name() == AUDIT_REPLICA_STATE_UPDATE_SPAN_NAME
        {
            false
        } else {
            true
        }
    }
}