dailyrollingfileappender in grails

Question

I want to use send log messages to hourly rolling files in my grails application. Here is how I have configured log4j in Config.groovy

appenders {
    rollingFile name:"stacktrace",
                file: "/tmp/logs/app.log",
                conversionPattern: '%-5p %d{MM-dd HH:mm:ss} %m  (%F:%L)'

    appender new DailyRollingFileAppender(
            name: "events",
            datePattern: "'.'yyyy-MM-dd-HH:mm",
            file: "/tmp/logs/app_events.log",
            layout: pattern(conversionPattern: "%c{2} %m%n")
    )
}

root {
    error 'stacktrace'
}

error  'org.codehaus.groovy.grails.web.servlet',        // controllers
        'org.codehaus.groovy.grails.web.pages',          // GSP
        'org.codehaus.groovy.grails.web.sitemesh',       // layouts
        'org.codehaus.groovy.grails.commons',            // core / classloading
        'org.codehaus.groovy.grails.plugins',            // plugins
        'org.springframework'
info  events: "com.app.events", additivity: false

This is how I'm getting logger for events within com.app.events package:

LOG = Logger.getLogger('events')
LOG.info("logging info")

I'm not sure what I'm missing here. I don't see any logs printed. If I add info 'events' inside root, it works but logs from all packages also go inside app_events.log which is not what I want. I only want logs from com.app.events package to go in app_events.log.

Answer 1

The parts of the logging instructions line in Config.groovy are:

// "Logging Level" "Appender Name": "Logger Name", "Other Options"
info  events: "com.app.events", additivity: false

And in where you retrieve your logger:

// LOG = Logger.getLogger("Logger Name")
LOG = Logger.getLogger('events')

So to have the events appender receive package com.app.events logging, change how you retrieve your logger to:

LOG = Logger.getLogger('com.app.events')

---

Maybe using error 'stacktrace' in the root block is affecting log4j. The stacktrace appender is a special appender just for full stacktraces. Try adding another appender as your root appender and use that in place of 'stacktrace' in your root block.

appenders {
    appender new DailyRollingFileAppender(
        name: "base",
        datePattern: "'.'yyyy-MM-dd-HH:mm",
        file: "/tmp/logs/app_events.log",
        layout: pattern(conversionPattern: "%c{2} %m%n")
    )
}

root {
    error "base"
}