Logging

Contents

• Logging

  • Logging messages

  • Logging stats

  • Verbose logging

  • Syslog logging

Logging messages

rPLC automatically re-exports logging macros of log crate, which can be called directly:

use rplc::prelude::*;

fn main() {
    trace!("test");
    debug!("test");
    info!("test");
    warn!("test");
    error!("test");
}

Note

It is not recommended to log messages in high-frequency-called PLC programs.

Logging stats

The library has got a method which can log thread statistical data (iterations, jitters etc.) with the specified time interval:

use rplc::prelude::*;
use std::time::Duration;

fn main() {
    init_plc!();
    rplc::tasks::spawn_stats_log(Duration::from_secs(5));
    run_plc!();
}

Verbose logging

By default the log level is “INFO” and below. Trace/debug logging can be activated with setting the system environment variable “VERBOSE” to 1:

VERBOSE=1 ./myplc

Syslog logging

By default log messages are output to the standard output. The messages can be redirected to syslog with setting the system environment variable “SYSLOG” to 1:

SYSLOG=1 ./myplc