structured-logger

A logging implementation for the log crate that logs structured values as JSON (CBOR, or any other) into a file, stderr, stdout, or any other.

Usage

See the [API documentation] for more.

Example

```rust use serde::Serialize; use std::{io, time::SystemTime, time::UNIXEPOCH}; use structuredlogger::{newjsonwriter, Logger};

fn main() { // Initialize the logger. Logger::new() // set a specific writer (format to JSON, write to stdout) for target "request". .withtargetwriter("request", newjsonwriter(io::stdout())) .init();

let kv = ContextLog {
    uid: "user123".to_string(),
    action: "upate_book".to_string(),
};

log::info!("hello world");
// {"target":"simple","message":"hello world","level":"INFO"}

// mock request data
log::info!(target: "request",
    method = "GET",
    path = "/hello",
    status = 200 as u16,
    start = unix_ms(),
    elapsed = 10 as u64,
    kv = log::as_serde!(kv);
    "",
);
// {"method":"GET","target":"request","message":"","path":"/hello","status":200,"level":"INFO","start":1679647263247,"kv":{"uid":"user123","action":"upate_book"},"elapsed":10}

}

[derive(Serialize)]

struct ContextLog { uid: String, action: String, }

fn unixms() -> u64 { let ts = SystemTime::now() .durationsince(UNIXEPOCH) .expect("system time before Unix epoch"); ts.asmillis() as u64 } ```