// cargo run --example basic-logs

use opentelemetry_appender_tracing::layer;
use opentelemetry_journald_logs_unofficial::JournaldLogExporter;
use opentelemetry_sdk::logs::LoggerProvider;
use tracing::info;
use tracing_subscriber::prelude::*;

fn init_logger() -> LoggerProvider {
    let exporter = JournaldLogExporter::builder()
        .identifier("opentelemetry-journal-exporter")
        .message_size_limit(4 * 1024)
        .attribute_prefix(Some("OTEL_".to_string()))
        .json_format(true) //uncomment to log in json format
        .build()
        .expect("Failed to build JournaldLogExporter");

    LoggerProvider::builder()
        .with_simple_exporter(exporter)
        .build()
}

fn main() {
    let logger_provider = init_logger();
    let layer = layer::OpenTelemetryTracingBridge::new(&logger_provider);
    tracing_subscriber::registry().with(layer).init();

    info!(event_id = 1234, user_id = 5678, "my test message");
}