grails

@Grapes([
    @Grab(group=‘org.slf4j’, module=‘slf4j-api’, version=‘1.7.26’),
    @Grab(group=‘org.slf4j’, module=‘slf4j-simple’, version=‘1.7.26’),
])
import org.slf4j.*
import groovy.util.logging.Slf4j

@Slf4j
class HelloWorldSlf4j {

    def execute() {
        println(‘Testing will start after this...’)
        println “log.isDebugEnabled()? = ${log.isDebugEnabled()}”
        log.debug(“Calling #someExpensiveMethod() within a GString. ${someExpensiveMethod()}“)
        <http://log.info|log.info>(‘should be logged’)
        println(‘Testing will end now.‘)
    }


    def someExpensiveMethod() {
        println(‘#someExpensiveMethod() was invoked’)
        return ‘Dummy Value’
    }
}

def helloWorld = new HelloWorldSlf4j()
helloWorld.execute()