How to make ThresholdFilter work in logback

Question

I basically followed the instruction in Chapter 7 of the official logback documentation. Unfortunately, things don't seem to work properly, and I can't figure out why. So, here we are.

What I want to achieve is to log only info and above in console and all debug and above into log files. I have these lines in my logback.groovy:

appender("CONSOLE", ConsoleAppender) {
    encoder(PatternLayoutEncoder) {
        pattern = "%d{YYYY-MM-dd/HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n"
    }
    filter(ThresholdFilter) {
        level = INFO
    }
}

logger("vh.FileIO", DEBUG, ['CONSOLE','FILE-DEBUG'])
root(DEBUG, ['CONSOLE'])

I thought the ThresholdFilter would make CONSOLE only take info and above logs. However, I still get debug logs of vh.FileIO on the CONSOLE. For example, I still get something like this on the console:

2013-10-11/21:48:10.537 [main] DEBUG vh.FileIO - Combining all records into file ./output/sip_sample_data_output.csv

So, what am I missing here?

update

After playing with the configuration of logback, I find that the ThresholdFilter works as expected if I use an XML configuration file. However, I still would like to know why it's not working in the groovy configuration file.

Answer 1

Solution for the problem is the following: just add import of the class ThresholdProvider at the beginning of "logback.groovy":

import ch.qos.logback.classic.filter.ThresholdFilter

then it works as expected.

I tried the provided "logback.groovy" on a simple project. There's another problem: messages are written twice to the console. I think this could be fixed by fine-tuning "logger" and "root" calls.