| AbsoluteTimeDateFormat | Formats a date in the format HH:mm:ss,SSS for example, "15:49:37,459" |
| Action | A file system action performed as part of a rollover event |
| AndFilter | A filter that 'and's the results of any number of contained filters together |
| Appender | Implement this interface for your own strategies for outputting log statements |
| AppenderAttachable | This Interface is for attaching Appenders to objects |
| AppenderAttachableImpl | |
| AppenderSkeleton | Implementation base class for all appenders |
| APRInitializer | |
| AsyncAppender | The AsyncAppender lets users log events asynchronously |
| BasicConfigurator | Use this class to quickly configure the package |
| BindException | Signals that an error occurred while attempting to bind a socket to a local address and port |
| BufferedOutputStream | Abstract class for writing to character streams |
| BufferedWriter | Writes text to a character-output stream buffering requests to increase efficiency |
| ByteArrayInputStream | InputStream implemented on top of a byte array |
| ByteArrayOutputStream | OutputStream implemented on top of std::vector |
| ByteBuffer | A byte buffer |
| CachedDateFormat | |
| CharMessageBuffer | This class is used by the LOG4CXX_INFO and similar macros to support insertion operators in the message parameter |
| CharsetDecoder | An abstract engine to transform a sequences of bytes in a specific charset into a LogString |
| CharsetEncoder | An engine to transform LogStrings into bytes for the specific character set |
| Class | |
| ClassNamePatternConverter | Formats the class name of the site of the logging request |
| ClassNotFoundException | Thrown when an application tries to load in a class through its string name but no definition for the class with the specified name could be found |
| ClassRegistration | |
| Object::ClazzObject | |
| ClosedChannelException | |
| Condition | This class provides a means for one thread to suspend exception until notified by another thread to resume |
| Configurator | Implemented by classes capable of configuring log4j using a URL |
| ConnectException | Signals that an error occurred while attempting to connect a socket to a remote address and port |
| ConsoleAppender | ConsoleAppender appends log events to stdout or stderr using a layout specified by the user |
| CyclicBuffer | CyclicBuffer is used by other appenders to hold instances of LoggingEvent for immediate or deferred display |
| DailyRollingFileAppender | DailyRollingFileAppender extends FileAppender so that the underlying file is rolled over at a user chosen frequency |
| DatagramPacket | This class represents a datagram packet |
| DatagramSocket | This class represents a socket for sending and receiving datagram packets |
| Date | Simple transcoder for converting between external char and wchar_t strings and internal strings |
| DateFormat | DateFormat is an abstract class for date/time formatting patterned after java.text.DateFormat |
| DateLayout | This abstract layout takes care of all the date related options and formatting work |
| DatePatternConverter | Convert and format the event's date in a StringBuffer |
| DateTimeDateFormat | Formats a date in the format dd MMM yyyy HH:mm:ss,SSS for example, "06 Nov 1994 15:49:37,459" |
| DefaultConfigurator | Configures the repository from environmental settings and files |
| DefaultLoggerFactory | |
| DefaultRepositorySelector | |
| DenyAllFilter | This filter drops all logging events |
| DOMConfigurator | Use this class to initialize the log4cxx environment using a DOM tree |
| DOMException | |
| ErrorCode | |
| ErrorHandler | Appenders may delegate their error handling to ErrorHandlers |
| Exception | The class Exception and its subclasses indicate conditions that a reasonable application might want to catch |
| ExpressionFilter | A filter supporting complex expressions - supports both infix and postfix expressions (infix expressions must first be converted to postfix prior to processing) |
| FallbackErrorHandler | The FallbackErrorHandler implements the ErrorHandler interface such that a secondary appender may be specified |
| File | An abstract representation of file and directory path names |
| FileAppender | FileAppender appends log events to a file |
| FileDatePatternConverter | Formats an date by delegating to DatePatternConverter |
| FileInputStream | InputStream implemented on top of APR file IO |
| FileLocationPatternConverter | Return the event's line location information in a StringBuffer |
| FileOutputStream | OutputStream implemented on top of APR file IO |
| FileRenameAction | |
| FileWatchdog | Check every now and then that a certain file has not changed |
| Filter | Users should extend this class to implement customized logging event filtering |
| FilterBasedTriggeringPolicy | FilterBasedTriggeringPolicy determines if rolling should be triggered by evaluating the current message against a set of filters |
| FixedWindowRollingPolicy | When rolling over, FixedWindowRollingPolicy renames files according to a fixed window algorithm as described below |
| FormattingInfo | Modifies the output of a pattern converter for a specified minimum and maximum width and alignment |
| FullLocationPatternConverter | Format the event's line location information |
| GZCompressAction | |
| Hierarchy | This class is specialized in retrieving loggers by name and also maintaining the logger hierarchy |
| HierarchyEventListener | Listen to events occuring within a Hierarchy |
| HTMLLayout | This layout outputs events in a HTML table |
| IllegalArgumentException | Thrown to indicate that a method has been passed an illegal or inappropriate argument |
| IllegalMonitorStateException | |
| IllegalStateException | |
| InetAddress | |
| InputStream | Abstract class for reading from character streams |
| InputStreamReader | Class for reading from character streams |
| InstantiationException | Thrown when an application tries to create an instance of a class using the newInstance method in class Class, but the specified class object cannot be instantiated because it is an interface or is an abstract class |
| Integer | |
| IntegerPatternConverter | Formats an integer |
| InterruptedException | |
| InterruptedIOException | Signals that an I/O operation has been interrupted |
| IOException | Signals that an I/O exception of some sort has occurred |
| ISO8601DateFormat | Formats a date in the format yyyy-MM-dd HH:mm:ss,SSS for example "1999-11-27 15:49:37,459" |
| Layout | Extend this abstract class to create your own log layout format |
| Level | Defines the minimum set of levels recognized by the system, that is OFF, FATAL, ERROR, WARN, INFO, DEBUG and ALL |
| Level::LevelClass | |
| LevelMatchFilter | This is a very simple filter based on level matching |
| LevelPatternConverter | Return the event's level in a StringBuffer |
| LevelRangeFilter | This is a very simple filter based on level matching, which can be used to reject messages with priorities outside a certain range |
| LineLocationPatternConverter | Format the event's line location information |
| LineSeparatorPatternConverter | Formats a line separator |
| LiteralPatternConverter | Formats a string literal |
| Loader | |
| Locale | |
| LocationInfo | This class represents the location of a logging statement |
| LocationInfoFilter | Location information is usually specified at the appender level - all events associated with an appender either create and parse stack traces or they do not |
| Logger | This is the central class in the log4cxx package |
| LoggerFactory | Implement this interface to create new instances of Logger or a sub-class of Logger |
| LoggerPatternConverter | Formats a logger name |
| LoggerRepository | A LoggerRepository is used to create and retrieve Loggers |
| LoggingEvent | The internal representation of logging events |
| LoggingEventPatternConverter | LoggingEventPatternConverter is a base class for pattern converters that can format information from instances of LoggingEvent |
| LogLog | This class used to output log statements from within the log4cxx package |
| LogManager | Use the LogManager class to retreive Logger instances or to operate on the current LoggerRepository |
| logstream | An STL-like stream API for log4cxx using char as the character type |
| logstream_base | Base class for the basic_logstream template which attempts to emulate std::basic_ostream but attempts to short-circuit unnecessary operations |
| ManualTriggeringPolicy | ManualTriggeringPolicy only rolls over on explicit calls to RollingFileAppender.rollover() |
| MapFilter | |
| MDC | Similar to the NDC class except that it is based on a map instead of a stack |
| MessageBuffer | This class is used by the LOG4CXX_INFO and similar macros to support insertion operators in the message parameter |
| MessagePatternConverter | Formats the message of an logging event |
| MethodLocationPatternConverter | Return the event's line location information in a StringBuffer |
| MissingResourceException | |
| Mutex | |
| MutexException | |
| NameAbbreviator | NameAbbreviator generates abbreviated logger and class names |
| NamePatternConverter | Base class for other pattern converters which can return only parts of their name |
| NDC | Ndc class implements nested diagnostic contexts as defined by neil harrison in the article "patterns for logging
diagnostic messages" part of the book "<i>pattern languages of
program design 3</i>" edited by martin et al |
| NDCPatternConverter | Return the event's NDC in a StringBuffer |
| NoSuchElementException | |
| NTEventLogAppender | Appends log events to NT EventLog |
| NullPointerException | Thrown when an application attempts to use null in a case where an object is required |
| Object | Base class for java-like objects |
| ObjectImpl | Implementation class for Object |
| ObjectOutputStream | Emulates java serialization |
| ObjectPtrBase | |
| ObjectPtrT< T > | Smart pointer to a Object descendant |
| ODBCAppender | |
| OnlyOnceErrorHandler | The OnlyOnceErrorHandler implements log4cxx's default error handling policy which consists of emitting a message for the first error in an appender and ignoring all following errors |
| OptionConverter | A convenience class to convert property values to specific types |
| OptionHandler | A string based interface to configure package components |
| OutputDebugStringAppender | |
| OutputStream | Abstract class for writing to character streams |
| OutputStreamWriter | Abstract class for writing to character streams |
| PatternConverter | |
| PatternLayout | A flexible layout configurable with pattern string |
| PatternParser | Most of the work of the PatternLayout class is delegated to the PatternParser class |
| Pool | |
| PoolException | |
| Properties | |
| PropertiesPatternConverter | Able to handle the contents of the LoggingEvent's Property bundle and either output the entire contents of the properties in a similar format to the java.util.Hashtable.toString(), or to output the value of a specific key within the property bundle when this pattern converter has the option set |
| PropertyConfigurator | Allows the configuration of log4cxx from an external file |
| PropertyFilter | NOTE: This filter modifies logging events by adding properties to the event |
| PropertyResourceBundle | PropertyResourceBundle is a concrete subclass of ResourceBundle that manages resources for a locale using a set of static strings from a property file |
| PropertySetter | General purpose Object property setter |
| Reader | Abstract class for reading from character streams |
| RelativeTimeDateFormat | Formats a date by printing the number of seconds elapsed since the start of the application |
| RelativeTimePatternConverter | Format the relative time in milliseconds |
| RepositorySelector | The LogManager uses one (and only one) RepositorySelector implementation to select the LoggerRepository for a particular application context |
| ResourceBundle | Resource bundles contain locale-specific objects |
| RollingFileAppender | RollingFileAppender extends FileAppender to backup the log files when they reach a certain size |
| RollingFileAppender | RollingFileAppender extends log4cxx::FileAppender to backup the log files depending on RollingPolicy and TriggeringPolicy |
| RollingFileAppenderSkeleton | Base class for log4cxx::rolling::RollingFileAppender and log4cxx::RollingFileAppender (analogues of org.apache.log4j.rolling.RFA from extras companion and org.apache.log4j.RFA from log4j 1.2, respectively) |
| RollingPolicy | A RollingPolicy is responsible for performing the rolling over of the active log file |
| RollingPolicyBase | Implements methods common to most, it not all, rolling policies |
| RolloverDescription | |
| RootLogger | RootLogger sits at the top of the logger hierachy |
| RuntimeException | RuntimeException is the parent class of those exceptions that can be thrown during the normal operation of the process |
| ServerSocket | |
| SimpleDateFormat | Concrete class for formatting and parsing dates in a locale-sensitive manner |
| SimpleLayout | SimpleLayout consists of the level of the log statement, followed by " - " and then the log message itself |
| SizeBasedTriggeringPolicy | SizeBasedTriggeringPolicy looks at size of the file being currently written to |
| SMTPAppender | Send an e-mail when a specific logging event occurs, typically on errors or fatal errors |
| Socket | |
| SocketAppender | Sends LoggingEvent objects to a remote a log server, usually Apache Chainsaw |
| SocketAppenderSkeleton | Abstract base class for SocketAppender and XMLSocketAppender |
| SocketException | Thrown to indicate that there is an error in the underlying protocol, such as a TCP error |
| SocketHubAppender | Sends LoggingEvent objects to a set of remote log servers, usually a SocketNode |
| SocketOutputStream | |
| SocketTimeoutException | Signals that an I/O operation has been interrupted |
| SQLException | |
| StrftimeDateFormat | Concrete class for formatting and parsing dates in a locale-sensitive manner |
| StrictMath | The class StrictMath contains methods for performing basic numeric operations |
| StringHelper | String manipulation routines |
| StringMatchFilter | This is a very simple filter based on string matching |
| StringTokenizer | |
| synchronized | Utility class for objects multi-thread synchronization |
| SyslogAppender | Use SyslogAppender to send log messages to a remote syslog daemon |
| SyslogWriter | SyslogWriter is a wrapper around the DatagramSocket class it writes text to the specified host on the port 514 (UNIX syslog) |
| System | Several useful class fields and methods |
| SystemErrWriter | Abstract class for writing to character streams |
| SystemOutWriter | Abstract class for writing to character streams |
| TelnetAppender | |
| Thread | This class implements an approximation of java.util.Thread |
| ThreadException | |
| ThreadLocal | This class provides thread-local variables |
| ThreadPatternConverter | Formats the event thread name |
| ThreadSpecificData | This class contains all the thread-specific data in use by log4cxx |
| ThrowableInformationPatternConverter | Outputs the ThrowableInformation portion of the LoggingiEvent as a full stacktrace unless this converter's option is 'short', where it just outputs the first line of the trace |
| TimeBasedRollingPolicy | TimeBasedRollingPolicy is both easy to configure and quite powerful |
| TimeZone | |
| Transcoder | Simple transcoder for converting between external char and wchar_t strings and internal strings |
| TranscoderException | |
| Transform | Utility class for transforming strings |
| TriggeringEventEvaluator | Implementions of this interface allow certain appenders to decide when to perform an appender specific action |
| TriggeringPolicy | A TriggeringPolicy controls the conditions under which rollover occurs |
| TTCCLayout | TTCC layout format consists of time, thread, logger name and nested diagnostic context information, hence the name |
| ulogstream | An STL-like stream API for log4cxx using UniChar as the character type |
| UniCharMessageBuffer | This class is designed to support insertion operations in the message argument to the LOG4CXX_INFO and similar macros and is not designed for general purpose use |
| UnknownHostException | |
| WideMessageBuffer | This class is designed to support insertion operations in the message argument to the LOG4CXX_INFO and similar macros and is not designed for general purpose use |
| wlogstream | An STL-like stream API for log4cxx using wchar_t as the character type |
| Writer | Abstract class for writing to character streams |
| WriterAppender | WriterAppender appends log events to a standard output stream |
| XMLDOMDocument | The XMLDOMDocument interface represents an entire XML document |
| XMLDOMElement | The XMLDOMElement interface represents an element in an XML document |
| XMLDOMNode | The XMLDOMNode interface is the primary datatype for the entire Document Object Model |
| XMLDOMNodeList | The XMLDOMNodeList interface provides the abstraction of an ordered collection of nodes, without defining or constraining how this collection is implemented |
| XMLLayout | The output of the XMLLayout consists of a series of log4j:event elements |
| XMLSocketAppender | Sends LoggingEvent objects in XML format to a remote a log server, usually a XMLSocketNode |
| ZipCompressAction | |