Shilpa: Without proper planning and clear strategy, the log messages produced by the system may not be useful for problem resolution.Effective logging is a balance between logging enough data to debug problems, while not dumping so much it confuses the issue.
Shilpa: Without proper planning and clear strategy, the log messages produced by the system may not be useful for problem resolution.Effective logging is a balance between logging enough data to debug problems, while not dumping so much it confuses the issue.
Log4J is old, excellent, widely used framework.SLF4J is written by the same author as Log4J. Both licenses permit for-profit usage.
Both Log4net and Nlog are open source, free libraries. Well-used and well-loved, mature technologies, that are known to work very well. No option to buy corporate support, but there is plenty of free support from the user community available online.
Console – for debugging purposes onlyWhile I prefer to log to a file: More flexibility to change what is being loggedLogging doesn’t compete with the application for DB connectionsDB access is broken more often than file accessWhy you may choose to log to the DB: Easier to parse logsIt is possible to use Aspects to separate logging concerns from the application logic - for logs that are stable. If you use logging to trace problems as the application is being developed and maintained – putting logs with the code is simpler and helps to shorted the development cycle.
While I prefer to log to a file: More flexibility to change what is being loggedLogging doesn’t compete with the application for DB connectionsDB access is broken more often than file accessWhy you may choose to log to the DB: Easier to parse logsIt is possible to use Aspects to separate logging concerns from the application logic - for logs that are stable. If you use logging to trace problems as the application is being developed and maintained – putting logs with the code is simpler and helps to shorted the development cycle.
Java properties is older, XML format can be more convenient since lots of other configuration is also done in XML.Whichever configuration file is found first on the file path is loaded and used. Configuring logging in code is generally a bad idea – any changes will require a re-compile and re-install.
Where in the code can be specified approximately, by outputting class, or in details, with file name, full class path, line number of the log request. Depending on the situation, it maybe helpful to have: Method caller informationthread diagnostic context-additional information on the state of the calling codeEach logging event should generate 1 line in the log file – makes for easier log processing.
While I prefer to log to a file: More flexibility to change what is being loggedLogging doesn’t compete with the application for DB connectionsDB access is broken more often than file accessWhy you may choose to log to the DB: Easier to parse logsIt is possible to use Aspects to separate logging concerns from the application logic - for logs that are stable. If you use logging to trace problems as the application is being developed and maintained – putting logs with the code is simpler and helps to shorted the development cycle.
Go back to examples
Go back to examples
Go back to examples
Go back to examples
Unless step 1 or step 2 throw, we already know both will happen – no need to log the second.When putting loggin inside a loop, it’s helpful to record loop counter and the item being processed.
Make sure logging operation itself will not add errors.Wrapping logging code in try-catch adds lines, making code less readable, and overhead. So, test!
It is important that logs are dense with information. If logging an object with no ToString method, it’s full type name will be printed – bad.Frameworks provide a way to post file and line from where logging is done – no need to do it in text. It’s fine to reduce logging as the code becomes stable and appears to have no more bugs.
Shilpa: Without proper planning and clear strategy, the log messages produced by the system may not be useful for problem resolution.Effective logging is a balance between logging enough data to debug problems, while not dumping so much it confuses the issue.
How to handle large log files,e.g Roll the files.... (zip them up after certain days etc....)
Programs that experience issues tend to log more, causing higher log volume, more stress on the disk, and more frequent log rotation. Which could make the situation worse. Watching log’s rate of growth can provide information on the health of the application.
A rare bug is harder to trace – and usually presents less of a problem to the business. When arbitraging future work, use logs to learn what users want.
Cygwin-provided Unix utilities work great on Windows
Target your research: Trace by user, by what happens in a particular piece of code, or what is logged at a particular level.
A rare bug is harder to trace – and usually presents less of a problem to the business. When arbitraging future work, use logs to learn what users want.