Mark created LOG4NET-475:
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Summary: Cannot add appender in Log4net at runtime
Key: LOG4NET-475
URL: https://issues.apache.org/jira/browse/LOG4NET-475
Project: Log4net
Issue Type: Bug
Components: Appenders
Affects Versions: 1.2.13
Environment: Windows, C#, Visual Studio unit testing
Reporter: Mark
Priority: Blocker
I am trying to write a custom appender that rolls over daily, as well as on a
size limit, and cleans up after itself in the process. I wrote the
implementation using the AppenderSkeleton as a base class, then attempted to
write a unit test to test the appender functionality. I do the following:
DailyRollingFileAppender appender = new DailyRollingFileAppender();
appender.RollOverOnSize = true;
appender.RollOverDaily = true; //dont think I can test this
appender.MaxFileSizeBytes = 1024;
appender.RolloverDayCount = 1;
appender.RollOverOnSize = true;
appender.LoggingDirectory =
Path.Combine(Directory.GetCurrentDirectory(), "TestLogFolder");
appender.LogFileName = "TestLogFileName";
appender.DateTimeFormatString = "YYYY-MM-DD-hh-mm-ss";
appender.Cleanup = true;
appender.Layout = new PatternLayout();
appender.MaxNumberOfFiles = 10;
appender.Name = "testAppender";
//lets write some crappy log messages
byte[] bytes = new byte[1050];
Random rnd = new Random();
rnd.NextBytes(bytes);
ILog log = LogManager.GetLogger("LoggerName");
Logger logger = (Logger)log.Logger;
logger.AddAppender(appender);
logger.Log(Level.Info, Encoding.UTF8.GetString(bytes), new
Exception());
logger.Log(Level.Info, Encoding.UTF8.GetString(bytes), null);
The code is based on the only examples I can find of people adding appenders to
loggers at runtime, which you would want to do for a unit test. The issue is
that the Logger instance I get from the call to ILog.Logger in the code above
as a collection of appenders of type ReadOnlyAppenderCollection. The code
silently consumes the exception it throws internally and never actually adds
the appender to the collection. Can/How do I add an appender to a logger at
runtime in the manner described above, so I can appropriately test that it
functions.
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