cern.cmw.rda
Class MessageLogger

java.lang.Object
  cern.cmw.rda.MessageLogger

public class MessageLogger
extends Object

Provides a mechanism for logging error and trace messages.

This class defines a general interface for the message logging and provides its default implementation that writes errors to System.err and traces to System.out. Derived classes can override this default behaviour and use various system specific logging facilities.

The actual class of the logger singleton is determined by the cmw.rda.loggerClassName property; if it is not defined then the default implementation is used. If the property has an invalid value (does not identify a loadable subclass of MessageLogger) then CmwInternalError will be thrown by the getLogger method.

See Also:

CmwInternalError

Field Summary

static boolean

DEBUG

Constructor Summary

protected

MessageLogger() Constructs a default MessageLogger.

Method Summary

void	error(String message) Records the specified error message.
static MessageLogger	getLogger() Returns the message logger singleton.
static int	getTraceLevel() Returns the trace level.
static void	setTraceLevel(int level) Sets the trace level to the specified value.
void	trace(int level, String message) Records the specified trace message if the current trace level is equal to or greater then the message level.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DEBUG

public static boolean DEBUG

Constructor Detail

MessageLogger

protected MessageLogger()

Constructs a default MessageLogger.

Method Detail

getLogger

public static MessageLogger getLogger()

Returns the message logger singleton.

getTraceLevel

public static int getTraceLevel()

Returns the trace level.

setTraceLevel

public static void setTraceLevel(int level)

Sets the trace level to the specified value.

error

public void error(String message)

Records the specified error message.

trace

public void trace(int level,
                  String message)

Records the specified trace message if the current trace level is equal to or greater then the message level.