Suppress auto-timestamping in Groovy

groovy_suppress_auto_timestamp.groovy

def withAutoTimestampSuppression(entity, closure) {
    toggleAutoTimestamp(entity, false)
    try {
        def result = closure()
        return result
    } finally {
        toggleAutoTimestamp(entity, true)
    }
}

void toggleAutoTimestamp(def domainObjectInstance, boolean shouldTimestamp) {
    ApplicationContext ctx = ServletContextHolder.servletContext.getAttribute(ApplicationAttributes.APPLICATION_CONTEXT)
    ClosureEventTriggeringInterceptor closureInterceptor = ctx.eventTriggeringInterceptor
    Datastore datastore = closureInterceptor.datastores.values().first()
    EventTriggeringInterceptor interceptor = datastore.eventTriggeringInterceptor
    ClosureEventListener listener = interceptor.findEventListener(domainObjectInstance)
    listener.shouldTimestamp = shouldTimestamp
}