| org.apache.commons.logging.impl |
|
Concrete implementations of commons-logging wrapper APIs.
|
| Java Source File Name | Type | Comment |
| AvalonLogger.java | Class | Implementation of commons-logging Log interface that delegates all
logging calls to the Avalon logging abstraction: the Logger interface.
There are two ways in which this class can be used:
|
| Jdk13LumberjackLogger.java | Class | |
| Jdk14Logger.java | Class | |
| Log4JLogger.java | Class | Implementation of
Log that maps directly to a
Logger for log4J version 1.2.
Initial configuration of the corresponding Logger instances should be done
in the usual manner, as outlined in the Log4J documentation.
The reason this logger is distinct from the 1.3 logger is that in version 1.2
of Log4J:
- class Logger takes Priority parameters not Level parameters.
- class Level extends Priority
Log4J1.3 is expected to change Level so it no longer extends Priority, which is
a non-binary-compatible change. |
| LogFactoryImpl.java | Class | Concrete subclass of
LogFactory that implements the
following algorithm to dynamically select a logging implementation
class to instantiate a wrapper for.
- Use a factory configuration attribute named
org.apache.commons.logging.Log to identify the
requested implementation class.
- Use the
org.apache.commons.logging.Log system property
to identify the requested implementation class.
- If Log4J is available, return an instance of
org.apache.commons.logging.impl.Log4JLogger.
- If JDK 1.4 or later is available, return an instance of
org.apache.commons.logging.impl.Jdk14Logger.
- Otherwise, return an instance of
org.apache.commons.logging.impl.SimpleLog.
If the selected
Log implementation class has a
setLogFactory() method that accepts a
LogFactory parameter, this method will be called on each newly created instance
to identify the associated factory. |
| LogKitLogger.java | Class | Implementation of org.apache.commons.logging.Log
that wraps the avalon-logkit
logging system. |
| NoOpLog.java | Class | Trivial implementation of Log that throws away all messages. |
| ServletContextCleaner.java | Class | This class is capable of receiving notifications about the undeployment of
a webapp, and responds by ensuring that commons-logging releases all
memory associated with the undeployed webapp.
In general, the WeakHashtable support added in commons-logging release 1.1
ensures that logging classes do not hold references that prevent an
undeployed webapp's memory from being garbage-collected even when multiple
copies of commons-logging are deployed via multiple classloaders (a
situation that earlier versions had problems with). |
| SimpleLog.java | Class | Simple implementation of Log that sends all enabled log messages,
for all defined loggers, to System.err. |
| WeakHashtable.java | Class | Implementation of Hashtable that uses WeakReference's
to hold its keys thus allowing them to be reclaimed by the garbage collector.
The associated values are retained using strong references.
This class follows the symantics of Hashtable as closely as
possible. |
| WeakHashtableTest.java | Class | |