Configuring log4j for use in a groovy script. Reading log4j config (via a config slurper)

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()

Thanks for the example. What is the toURL() method doing in line 21?

Thanks,

How to create multiple log files which are like

1. Detail (ALL level of logs)
2. Fail (ERROR level of logs)