Use log4j in a groovy script As asked in this <a href="http://stackoverflow.com/questions/19868180/groovy-script-and-log4j">stackoverflow question - groovy-script-and-log4j</a>

LoggingFromConsoleScript.groovy

/**
 * Use a Grails based Config.groovy to configure log4j
 *
 * 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() {
//        required as described here: http://groovy.329449.n5.nabble.com/log4j-annotation-not-working-td4368806.html
        log.level = Level.INFO
        // add an appender to log to file
        log.addAppender(new FileAppender(new TTCCLayout(), 'myscript.log'));

        // 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()