General questions about logging Should Logger members of a class be declared as static? Unfortunately, while declaring commons-logging in the provided scope gets the job done, your IDE, e. No-commons-logging is a Maven hack that allows you to exclude commons-logging from your application with a single piece of configuration. The Marker interface, part of the org. Logger which take a Marker as the first argument.
If a given error requires attention beyond that allocated for ordinary errors, simply mark the logging statement with a specially designated marker which can be named "FATAL" or any other name to your liking. More specifically, each time a logger is retrieved by invoking LoggerFactory. She should be the person to decide how she wants her logging configured. Refer to slf4j-jcl, slf4j-jdk14, and slf4j-log4j12 modules for examples of adapters. The problem will be compounded by each framework that comes up with its own wrapper in order to make SLF4J optional. Conforming SLF4J implementations may choose not to participate, in which case, no version check will be performed. For instance, if you are using slf4j-api By adopting an independent logging abstraction strategy, Velocity developers have made life harder for themselves, but more importantly, they made life harder for their users. Yes, as of version 1. This means than you can upgrade from SLF4J version 1. Excluding commons-logging explicitly for multiple dependencies distributed on several pom. While these are valid arguments, there are three opposing arguments also worth considering. SLF4J, in accordance with the programmer's most probable intention, will interpret NumberFormatException instance as a throwable instead of an unused Object parameter. Underlying logging frameworks will print the location class name and line number of the wrapper instead of the real caller. Assuming entry is an object, you can write: Is there a recommended idiom for declaring a logger in a class? Unfortunately Maven does not provide an easy way to exclude a certain package throughout your project. The java compiler will invoke the error method taking a String and two Object arguments. You don't have to declare it yourself. However, nothing prevents other logging frameworks from making use of marker data. However, the second form will outperform the first form by a factor of at least 30, in case of a disabled logging statement. Wrappers will need to depend on certain internal SLF4J interfaces which change from time to time, contrary to the client-facing API which never changes. The following two lines will yield the exact same output. About every second pom declares it is dependent on commons-logging. The value of this variable should be equal to the version of the slf4j-api. The second declaration includes jcl-over-slf4j into your project. This is rather easy to accomplish.
Yes, as of SLF4J 1. The staff attempt may therefore be alive gratis. How do you use no-commons-logging. Why doesn't the commnos. Still also thought the FAQ result on backward honour for a more gratis explanation.