Hello all, In SLF4J-526, Adrian Shum proposed to modify the fluent API. Currently, to emit a debug message with two parameters, one has to write the following logger.atDebug() .addArgument(country).addArgument(oldTemp).addArgument(newTemp) .log("Temperature of {} rise from {} to {}"); He proposes that the API be changed to logger.atDebug() .message("Temperature of {} rise from {} to {}" ) .arg(country).arg(oldTemp).arg(newTemp).log(); I think his suggestion makes sense with one inconvenience. In case the user forgets to call the no-argument log() method, then nothing will happen, i.e. no logging will occur. With the current API, it is harder for the user to forget the log(String) method containing the message content. Before going forward with Adrian's proposal or not, I would like to receive input by interested parties. Best regards, [1] https://jira.qos.ch/browse/SLF4J-526 -- Ceki Gülcü