org.mmbase.util.logging
Class ChainedLogger

java.lang.Object
  org.mmbase.util.logging.ChainedLogger

All Implemented Interfaces:

Externalizable, Serializable, Logger

public class ChainedLogger
extends Object
implements Logger, Externalizable

Straight forward implemented which simply delegates every log-statement to a list of other other loggers.

Since:

MMBase-1.9.1

Version:

$Id: ChainedLogger.java 41055 2010-02-15 23:59:16Z michiel $

Author:

Michiel Meeuwissen

See Also:

Serialized Form

Constructor Summary

ChainedLogger()

ChainedLogger(Logger... ls)

Method Summary

ChainedLogger	addLogger(Logger l)
boolean	containsLogger(Logger l)
void	debug(Object m) Logs the message m with debug priority.
void	debug(Object m, Throwable t)
void	error(Object m) Logs the message m with error priority.
void	error(Object m, Throwable t)
void	fatal(Object m) Logs the message m with fatal priority.
void	fatal(Object m, Throwable t)
List<Logger>	getLoggers()
void	info(Object m) Logs the message m with info priority.
void	info(Object m, Throwable t)
boolean	isDebugEnabled() Returns true if for this category (Logger), a call to debug (or trace) would do something.
boolean	isEnabledFor(Level l)
boolean	isServiceEnabled() Returns true if for this category (Logger), a call to service (or debug or trace) would do something.
boolean	isTraceEnabled() Returns true if for this category (Logger), a call to trace would do something.
void	readExternal(ObjectInput in)
boolean	removeLogger(Logger l)
void	service(Object m) Logs the message m with service priority.
void	service(Object m, Throwable t)
void	setLevel(Level p) If you want to override the level in the configuration file fixed for this category, you can do it with this method.
String	toString()
void	trace(Object m) Logs the message m with trace priority.
void	trace(Object m, Throwable t)
void	warn(Object m) Logs the message m with warn priority.
void	warn(Object m, Throwable t)
void	writeExternal(ObjectOutput stream)

Methods inherited from class java.lang.Object

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

Constructor Detail

ChainedLogger

public ChainedLogger()

ChainedLogger

public ChainedLogger(Logger... ls)

Method Detail

getLoggers

public List<Logger> getLoggers()

addLogger

public ChainedLogger addLogger(Logger l)

containsLogger

public boolean containsLogger(Logger l)

removeLogger

public boolean removeLogger(Logger l)

trace

public void trace(Object m)

Description copied from interface: Logger

Logs the message m with trace priority. For detailled debugging.

Specified by:

trace in interface Logger

See Also:

Logger.debug(Object)

trace

public void trace(Object m,
                  Throwable t)

Specified by:

trace in interface Logger

debug

public void debug(Object m)

Description copied from interface: Logger

Logs the message m with debug priority. Everything a non-developer never wants to see, but you do, to * keep track of what is happening. There can be a lot of them in the code, so it is important that you well protect them with `isDebugEnabled's, to minimize overhead.

Specified by:

debug in interface Logger

debug

public void debug(Object m,
                  Throwable t)

Specified by:

debug in interface Logger

service

public void service(Object m)

Description copied from interface: Logger

Logs the message m with service priority. An interested system administrator might want to see these things. For examples all queries to the database could be logged with `service' priority. Or if a image is calculated, that could be logged as a `service'. One would get a fairly good idea what MMBase is doing if `service' is switched on.

Specified by:

service in interface Logger

service

public void service(Object m,
                    Throwable t)

Specified by:

service in interface Logger

info

public void info(Object m)

Description copied from interface: Logger

Logs the message m with info priority. As `service', but focussed on things system administrators are usually most interested in, like authorisation issues. For example changes on the database could be logged, such that one can see in the logs what happened.

Specified by:

info in interface Logger

info

public void info(Object m,
                 Throwable t)

Specified by:

info in interface Logger

warn

public void warn(Object m)

Description copied from interface: Logger

Logs the message m with warn priority. Something strange happened, but it is not necessarily an error.

Specified by:

warn in interface Logger

warn

public void warn(Object m,
                 Throwable t)

Specified by:

warn in interface Logger

error

public void error(Object m)

Description copied from interface: Logger

Logs the message m with error priority. Something is definitely wrong. An inconsistency was detected. It might be unpredictable what will happen.

Specified by:

error in interface Logger

error

public void error(Object m,
                  Throwable t)

Specified by:

error in interface Logger

fatal

public void fatal(Object m)

Description copied from interface: Logger

Logs the message m with fatal priority. The progam could not function any more. Normally, you would throw an exception, which then will be logged with fatal priority. I've made an arangement in `Logger' that logs uncatched exceptions with fatal priority, but nevertheless it's better to always catch all exceptions in a more regulated way.

Specified by:

fatal in interface Logger

fatal

public void fatal(Object m,
                  Throwable t)

Specified by:

fatal in interface Logger

isTraceEnabled

public boolean isTraceEnabled()

Description copied from interface: Logger

Returns true if for this category (Logger), a call to trace would do something.

Specified by:

isTraceEnabled in interface Logger

isDebugEnabled

public boolean isDebugEnabled()

Description copied from interface: Logger

Returns true if for this category (Logger), a call to debug (or trace) would do something.

Specified by:

isDebugEnabled in interface Logger

isServiceEnabled

public boolean isServiceEnabled()

Description copied from interface: Logger

Returns true if for this category (Logger), a call to service (or debug or trace) would do something.

Specified by:

isServiceEnabled in interface Logger

isEnabledFor

public boolean isEnabledFor(Level l)

Specified by:

isEnabledFor in interface Logger

setLevel

public void setLevel(Level p)

Description copied from interface: Logger

If you want to override the level in the configuration file fixed for this category, you can do it with this method. This could be usefull for example to switch on all debug logging when something has gone wrong.

Specified by:

setLevel in interface Logger

Parameters:

p - The level of the priority. One of the constants Level.TRACE, Level.DEBUG, Level.SERVICE, Level.INFO, Level.WARN, Level.ERROR or Level.FATAL.

toString

public String toString()

Overrides:

toString in class Object

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
                         ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Throws:

IOException

ClassNotFoundException

writeExternal

public void writeExternal(ObjectOutput stream)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Throws:

IOException