How to enable/disable Alfresco folder rules using JavaScript

enable_disable_folder_rules.js

var context = Packages.org.springframework.web.context.ContextLoader.getCurrentWebApplicationContext();
var ruleService = context.getBean('RuleService', Packages.org.alfresco.service.cmr.rule.RuleService);

logger.warn("Before disabling: " + ruleService.isEnabled());

logger.warn("Disabling rules");
ruleService.disableRules();

logger.warn("After disabling: " + ruleService.isEnabled());

try {
	logger.warn("Nothing to see here!");
} finally {
	logger.warn("Before enabling: " + ruleService.isEnabled());

	logger.warn("Enabling rules");
	ruleService.enableRules();

	logger.warn("After enabling: " + ruleService.isEnabled());
}