Redirecting Platform Logs - Java Native OS

Introduction

Utilize the Java 9 Unified Logging API to filter the logs and route accordingly.

java -Xlog:gc=debug:file=gc.txt:none Main

This will result in the creation of a file named gc.txt in the current directory, and all log messages pertaining to the specified -Xlog option will be written to it.

import java.time.LocalDate;
import java.time.LocalTime;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;


public class Main {
    
    private static Logger log = LogManager.getLogger();
    public static void main(String[] args){
        log.debug("Time Plus 5 Hours: ");
        log.debug("Time Minus 30 Minutes: ");
        
    }
}

The following table lists the -Xlog Decorators.

Decorator	Function
Time	Provides current time and date in ISO-8601 format.
uptime	Time that JVM has been up and running (in seconds and milliseconds).
timemillis	Value returned from System.currentTimeInMillis();
uptimemillis	Uptime of JVM in milliseconds.
timenanos	Value returned from System.nanoTime();
uptimenanos	Uptime of JVM in nanoseconds.
pid	Process identifier.
tid	Thread identifier.
level	Log message level.
tags	Tag-set associated with log message.

Three types of output are supported, those being: stdout, stderr, and text file.

Redirecting Platform Logs - Java Native OS

Introduction

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