Hello Russ,
On 24/01/2025 19:46, slf4j developers list via slf4j-dev wrote:
Thank you for your comments.
With this method or any similar method,
public void info(String format, Object... arguments) {
if (isInfoEnabled()) {
handleArgArrayCall(Level.INFO, null, format, arguments);
}
}
If the number of objects in 'arguments' is more than the number of
placeholders, {}, the extra argument objects are not logged. Is there a
reason for that?
The reason is that catering for this eventuality would be relatively
complicated. More importantly, I think that it is not SLF4J's
responsibility to fix every possible error that could be made by the
programmer.
For example
public void setTemperature(Integer temperature) {
oldT = t;
t = temperature;
//Sent three parameters log with two placeholders
//Output "Temperature set to 90. Old value was null." The word extra
is not printed
logger.info("Temperature set to {}. Old value was {}.", t, oldT,
"extra");
if(temperature.intValue() > 50) {
logger.info("Temperature has risen above 50 degrees.");
}
}
The fluent API allows adding key value pairs which should avoid this
pitfall.
Best regards,
--
Ceki Gülcü
Sponsoring SLF4J/logback/reload4j at https://github.com/sponsors/qos-ch
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