| Name | Description | Type | Package | Framework |
| AvalonLogger | logging calls to the Avalon logging abstraction: the Logger interface. | Class | org.apache.commons.logging.impl | Apache Commons |
| Jdk13LumberjackLogger | interface that wraps the standard JDK logging mechanisms that are available in SourceForge's Lumberjack for JDKs prior to 1. | Class | org.apache.commons.logging.impl | Apache Commons |
| Jdk14Logger | interface that wraps the standard JDK logging mechanisms that were introduced in the Merlin release (JDK 1. | Class | org.apache.commons.logging.impl | Apache Commons |
| Log | A simple logging interface abstracting logging APIs. | Interface | org.apache.commons.logging | Apache Commons |
| Log4JLogger | Logger for log4J version 1. | Class | org.apache.commons.logging.impl | Apache Commons |
| LogConfigurationException | An exception that is thrown only if a suitable LogFactory or Log instance cannot be created by the corresponding | Class | org.apache.commons.logging | Apache Commons |
| LogFactory | Factory for creating Log instances, with discovery and configuration features similar to that employed by standard Java APIs | Class | org.apache.commons.logging | Apache Commons |
| LogFactoryImpl | Concrete subclass of LogFactory that implements the following algorithm to dynamically select a logging implementation | Class | org.apache.commons.logging.impl | Apache Commons |
| LogKitLogger | that wraps the avalon-logkit logging system. | Class | org.apache.commons.logging.impl | Apache Commons |
| LogSource | Factory for creating Log instances. | Class | org.apache.commons.logging | Apache Commons |
| NoOpLog | Trivial implementation of Log that throws away all messages. | Class | org.apache.commons.logging.impl | Apache Commons |
| ServletContextCleaner | This class is capable of receiving notifications about the undeployment of a webapp, and responds by ensuring that commons-logging releases all | Class | org.apache.commons.logging.impl | Apache Commons |
| SimpleLog | Simple implementation of Log that sends all enabled log messages, for all defined loggers, to System. | Class | org.apache.commons.logging.impl | Apache Commons |
| WeakHashtable | to hold its keys thus allowing them to be reclaimed by the garbage collector. | Class | org.apache.commons.logging.impl | Apache Commons |
| Log | A simple logging interface abstracting logging APIs. | Interface | org.apache.commons.logging | SLF4J |
| LogConfigurationException | An exception that is thrown only if a suitable LogFactory or Log instance cannot be created by the corresponding factory | Class | org.apache.commons.logging | SLF4J |
| LogFactory | Factory for creating Log instances, which always delegates to an instance of SLF4JLogFactory. | Class | org.apache.commons.logging | SLF4J |
| NoOpLog | Trivial implementation of Log that throws away all messages. | Class | org.apache.commons.logging.impl | SLF4J |
| SimpleLog | Simple implementation of Log that sends all enabled log messages, for all defined loggers, to System. | Class | org.apache.commons.logging.impl | SLF4J |
| SLF4JLocationAwareLog | delegates all processing to a wrapped org. | Class | org.apache.commons.logging.impl | SLF4J |
| SLF4JLog | delegates all processing to a wrapped org. | Class | org.apache.commons.logging.impl | SLF4J |
| SLF4JLogFactory | Concrete subclass of LogFactory which always delegates to the org. | Class | org.apache.commons.logging.impl | SLF4J |
| Log | A simple logging interface abstracting logging APIs. | Interface | org.apache.commons.logging | OSGI |
| LogConfigurationException | An exception that is thrown only if a suitable LogFactory or Log instance cannot be created by the corresponding | Class | org.apache.commons.logging | OSGI |
| LogFactory | Factory for creating Log instances, with discovery and configuration features similar to that employed by standard Java APIs | Class | org.apache.commons.logging | OSGI |
| LogSource | Factory for creating Log instances. | Class | org.apache.commons.logging | OSGI |
| Log | A simple logging interface abstracting logging APIs. | Interface | org.apache.commons.logging | KnoplerFish |
| LogConfigurationException | An exception that is thrown only if a suitable LogFactory or Log instance cannot be created by the corresponding | Class | org.apache.commons.logging | KnoplerFish |
| LogFactory | Factory for creating Log instances, with discovery and configuration features similar to that employed by standard Java APIs | Class | org.apache.commons.logging | KnoplerFish |
| LogSource | Factory for creating Log instances. | Class | org.apache.commons.logging | KnoplerFish |