log4jconfig.groovy

log4j {

    appender.stdout = "org.apache.log4j.ConsoleAppender"
    appender."stdout.layout"="org.apache.log4j.PatternLayout"
    appender.scrlog = "org.apache.log4j.FileAppender"
    appender."scrlog.layout"="org.apache.log4j.TTCCLayout"
    appender."scrlog.file"="script.log"

    rootLogger="debug,scrlog,stdout"

    /** these don't do nothing but illustrate how to configure logging on packages
    logger.org.springframework="info,stdout"
    additivity.org.springframework=false
    **/
}

LoggingFromConsoleScript.groovy

/**
 * Use log4j in a groovy script, with configuration from a groovy like config file
 *
 * As asked in this
 * <a href="http://stackoverflow.com/questions/19868180/groovy-script-and-log4j">stackoverflow question - groovy-script-and-log4j</a>
 *
 *
 * Tested with Java 7, Groovy 2.1.9
 * User: kon
 * Date: 9/11/13
 * Time: 11:48 AM
 */
@Grab('log4j:log4j:1.2.17')

import org.apache.log4j.*
import groovy.util.logging.*

@Log4j
class HelloWorld{
    def execute() {
        def config = new ConfigSlurper().parse(new File('log4jconfig.groovy').toURL())
        PropertyConfigurator.configure(config.toProperties())

        // this will print/write as the loglevel is info
        log.debug 'Execute HelloWorld.'
        // this will print
        log.info 'Simple sample to show log field is injected.'
    }
}

def helloWorld = new HelloWorld()
helloWorld.execute()