org.apache.felix.dependencymanager
Class Logger
java.lang.Object
org.apache.felix.dependencymanager.Logger
- All Implemented Interfaces:
- EventListener, ServiceListener
public class Logger
- extends Object
- implements ServiceListener
This class mimics the standard OSGi LogService interface. An
instance of this class is used by the dependency manager for all logging.
By default this class logs messages to standard out. The log level can be set to
control the amount of logging performed, where a higher number results in
more logging. A log level of zero turns off logging completely.
The log levels match those specified in the OSGi Log Service.
This class also tracks log services and will use the highest ranking
log service, if present, as a back end instead of printing to standard
out. The class uses reflection to invoking the log service's method to
avoid a dependency on the log interface. This class is in many ways similar
to the one used in the system bundle for that same purpose.
- Author:
- Felix Project Team
Method Summary |
protected void |
doLog(ServiceReference sr,
int level,
String msg,
Throwable throwable)
|
void |
log(int level,
String msg)
|
void |
log(int level,
String msg,
Throwable throwable)
|
void |
log(ServiceReference sr,
int level,
String msg)
|
void |
log(ServiceReference sr,
int level,
String msg,
Throwable throwable)
|
void |
serviceChanged(ServiceEvent event)
This method implements the callback for the ServiceListener interface. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
LOG_ERROR
public static final int LOG_ERROR
- See Also:
- Constant Field Values
LOG_WARNING
public static final int LOG_WARNING
- See Also:
- Constant Field Values
LOG_INFO
public static final int LOG_INFO
- See Also:
- Constant Field Values
LOG_DEBUG
public static final int LOG_DEBUG
- See Also:
- Constant Field Values
Logger
public Logger(BundleContext context)
log
public final void log(int level,
String msg)
log
public final void log(int level,
String msg,
Throwable throwable)
log
public final void log(ServiceReference sr,
int level,
String msg)
log
public final void log(ServiceReference sr,
int level,
String msg,
Throwable throwable)
doLog
protected void doLog(ServiceReference sr,
int level,
String msg,
Throwable throwable)
serviceChanged
public final void serviceChanged(ServiceEvent event)
- This method implements the callback for the ServiceListener interface.
It is public as a byproduct of implementing the interface and should
not be called directly. This method tracks run-time changes to log
service availability. If the log service being used by the framework's
logging mechanism goes away, then this will try to find an alternative.
If a higher ranking log service is registered, then this will switch
to the higher ranking log service.
- Specified by:
serviceChanged
in interface ServiceListener
Copyright © 2006-2011 Apache Software Foundation. All Rights Reserved.