| Name | Description | Type | Package | Framework |
| Slf4jLogger | Class | com.opensymphony.xwork2.util.logging.slf4j | Apache Struts | |
| Slf4jLoggerFactory | Creates slf4j-logging-backed loggers You can use the same to explicit tell the framework which implementation to use and don't depend on class discovery: | Class | com.opensymphony.xwork2.util.logging.slf4j | Apache Struts |