November 2002
Intermediate to advanced
464 pages
14h 34m
English
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Jakarta Commons Logging
The Commons Logging package is an open source Logging library that allows developers to use a common logging API, while maintaining the freedom to use many different third-party logging implementations. The Commons Logging API insulates the application and protects it from becoming coupled to a specific logging implementation. The API provides a small set of Java classes and interfaces that an application imports and relies upon but that has no implicit dependencies on any one logging product.
The Logging library allows developers to declaratively configure the logging implementation; the library will dynamically discover which implementation is being used. An application that uses the Commons Logging API does not have to be modified when the logging implementation is changed. This is the greatest benefit of such a package.
The Commons Logging package supports several logging implementations out of the box:
log4j (http://jakarta.apache.org/log4j)
JDK 1.4 Logging
SimpleLog(writes log messages tostdoutandstderr)NoOpLog(log messages are ignored)
Tip
The Commons Logging package includes only the
SimpleLog and NoOpLog
implementations; it does not contain the other third-party logging
implementations. You will need to download those separately.
Another powerful feature of the Commons Logging package is that it is completely extensible. If you are using a logging package that is not yet supported, you ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.