Java.util.logging configuration

• Add JVM options to select configuration file (the following shows setting the options when using the Gradle Application plugin)

  export JAVA_OPTS=-Djava.util.logging.config.file=$HOME/logging.properties

• And the logging.properties file:

  default logging level

  .level= INFO

Limit the messages that are printed on the console to INFO and above.

java.util.logging.ConsoleHandler.level = INFO
java.util.logging.ConsoleHandler.formatter = java.util.logging.SimpleFormatter

handlers=java.util.logging.ConsoleHandler

java.util.logging.SimpleFormatter.format=%1$tY-%1$tm-%1$td %1$tH:%1$tM:%1$tS %4$-6s %2$s %5$s%6$s%n

Or programmatically

static {
    System.setProperty("java.util.logging.SimpleFormatter.format", "%1$tY-%1$tm-%1$td %1$tH:%1$tM:%1$tS %4$s %2$s %5$s%6$s%n");
}

• Disable AWS Apache Commons logging

  static { java.util.logging.Logger.getLogger("com.amazonaws.http.AmazonHttpClient").setLevel(Level.WARNING); }

• Set alternative logger and remove default

    if (enableJsonLogs) {
        LogManager.getLogManager().reset();
        java.util.logging.Logger julLogger = java.util.logging.Logger.getLogger("");
        LogFormatter formatter = new LogFormatter();
        ConsoleHandler handler = new ConsoleHandler();
        handler.setFormatter(formatter);
        julLogger.addHandler(handler);
    }