org.apache.catalina
Interface Logger

All Known Implementing Classes:
LoggerBase

public interface Logger

A Logger is a generic interface for the message and exception logging methods of the ServletContext interface. Loggers can be attached at any Container level, but will typically only be attached to a Context, or higher level, Container.

Version:
$Revision: 1.3 $ $Date: 2001/07/22 20:13:30 $
Author:
Craig R. McClanahan

Field Summary
static int DEBUG
           
static int ERROR
           
static int FATAL
          Verbosity level constants for log messages that may be filtered by the underlying logger.
static int INFORMATION
           
static int WARNING
           
 
Method Summary
 void addPropertyChangeListener(java.beans.PropertyChangeListener listener)
          Add a property change listener to this component.
 Container getContainer()
          Return the Container with which this Logger has been associated.
 java.lang.String getInfo()
          Return descriptive information about this Logger implementation and the corresponding version number, in the format <description>/<version>.
 int getVerbosity()
          Return the verbosity level of this logger.
 void log(java.lang.Exception exception, java.lang.String msg)
          Writes the specified exception, and message, to a servlet log file.
 void log(java.lang.String message)
          Writes the specified message to a servlet log file, usually an event log.
 void log(java.lang.String message, int verbosity)
          Writes the specified message to the servlet log file, usually an event log, if the logger is set to a verbosity level equal to or higher than the specified value for this message.
 void log(java.lang.String message, java.lang.Throwable throwable)
          Writes an explanatory message and a stack trace for a given Throwable exception to the servlet log file.
 void log(java.lang.String message, java.lang.Throwable throwable, int verbosity)
          Writes the specified message and exception to the servlet log file, usually an event log, if the logger is set to a verbosity level equal to or higher than the specified value for this message.
 void removePropertyChangeListener(java.beans.PropertyChangeListener listener)
          Remove a property change listener from this component.
 void setContainer(Container container)
          Set the Container with which this Logger has been associated.
 void setVerbosity(int verbosity)
          Set the verbosity level of this logger.
 

Field Detail

FATAL

public static final int FATAL
Verbosity level constants for log messages that may be filtered by the underlying logger.

See Also:
Constant Field Values

ERROR

public static final int ERROR
See Also:
Constant Field Values

WARNING

public static final int WARNING
See Also:
Constant Field Values

INFORMATION

public static final int INFORMATION
See Also:
Constant Field Values

DEBUG

public static final int DEBUG
See Also:
Constant Field Values
Method Detail

getContainer

public Container getContainer()
Return the Container with which this Logger has been associated.


setContainer

public void setContainer(Container container)
Set the Container with which this Logger has been associated.

Parameters:
container - The associated Container

getInfo

public java.lang.String getInfo()
Return descriptive information about this Logger implementation and the corresponding version number, in the format <description>/<version>.


getVerbosity

public int getVerbosity()
Return the verbosity level of this logger. Messages logged with a higher verbosity than this level will be silently ignored.


setVerbosity

public void setVerbosity(int verbosity)
Set the verbosity level of this logger. Messages logged with a higher verbosity than this level will be silently ignored.

Parameters:
verbosity - The new verbosity level

addPropertyChangeListener

public void addPropertyChangeListener(java.beans.PropertyChangeListener listener)
Add a property change listener to this component.

Parameters:
listener - The listener to add

log

public void log(java.lang.String message)
Writes the specified message to a servlet log file, usually an event log. The name and type of the servlet log is specific to the servlet container. This message will be logged unconditionally.

Parameters:
message - A String specifying the message to be written to the log file

log

public void log(java.lang.Exception exception,
                java.lang.String msg)
Writes the specified exception, and message, to a servlet log file. The implementation of this method should call log(msg, exception) instead. This method is deprecated in the ServletContext interface, but not deprecated here to avoid many useless compiler warnings. This message will be logged unconditionally.

Parameters:
exception - An Exception to be reported
msg - The associated message string

log

public void log(java.lang.String message,
                java.lang.Throwable throwable)
Writes an explanatory message and a stack trace for a given Throwable exception to the servlet log file. The name and type of the servlet log file is specific to the servlet container, usually an event log. This message will be logged unconditionally.

Parameters:
message - A String that describes the error or exception
throwable - The Throwable error or exception

log

public void log(java.lang.String message,
                int verbosity)
Writes the specified message to the servlet log file, usually an event log, if the logger is set to a verbosity level equal to or higher than the specified value for this message.

Parameters:
message - A String specifying the message to be written to the log file
verbosity - Verbosity level of this message

log

public void log(java.lang.String message,
                java.lang.Throwable throwable,
                int verbosity)
Writes the specified message and exception to the servlet log file, usually an event log, if the logger is set to a verbosity level equal to or higher than the specified value for this message.

Parameters:
message - A String that describes the error or exception
throwable - The Throwable error or exception
verbosity - Verbosity level of this message

removePropertyChangeListener

public void removePropertyChangeListener(java.beans.PropertyChangeListener listener)
Remove a property change listener from this component.

Parameters:
listener - The listener to remove


Copyright 2000-2001 Apache Software Foundation. All Rights Reserved.