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Questions tagged [slf4j]

Simple Logging Facade for Java (SLF4J) serves as a simple facade or abstraction layer for various logging frameworks. Please also include a tag for the actual logging framework you're using if you are attempting to configure logging for your application.

The Simple Logging Facade for Java (commonly known as "SLF4J") serves as a simple facade or abstraction layer for various logging frameworks, e.g. java.util.logging, log4j and logback.

One can unify all logging across an application and the libraries it uses via this abstraction layer. Code familiar with SLF4J uses the SLF4J API directly for logging. Any existing code or libraries that use some other logging framework can be bridged to get their logging redirected to SLF4J instead. The end application at deployment time includes a binding to the actual logging framework that they are using, and can configure that logging framework as desired for all logging throughout the application.

References:

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SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". error

Regarding Eclipse IDE (Indigo, Juno and Kepler (32 and 64 bit versions)) Platforms: Windows, Ubuntu, Mac m2e version: 1.1.0.20120530-0009, 1.2.0.20120903-1050, 1.3.0.20130129-0926, 1.4.0.20130601-0317 General info The above error came after…
Konstantinos Margaritis
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How do you configure logging in Hibernate 4 to use SLF4J

Hibernate 3.x used slf4j for logging. Hibernate 4.x uses jboss-logging. I am writing a standalone application which uses Hibernate 4, and SLF4J for logging. How can i configure Hibernate to log to SLF4J? If that's not possible, how can i configure…
Tom Anderson
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What's Up with Logging in Java?

Why one would use one of the following packages instead of the other? Java Logging Commons Logging Log4j SLF4j Logback
Loki
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Logging framework incompatibility

I'm building a small Java app and hoping to use logback for logging. My app has a dependency on an older project that does its logging via org.apache.commons | com.springsource.org.apache.commons.logging | 1.1.1 ...so my plan was to use org.slf4j…
Carl Smotricz
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How to log exception and message with placeholders with SLF4J

What's the correct approach to log both an error message and an exception using SLF4J? I've tried doing this but the exception stack trace is never printed: logger.error("Unable to parse data {}", inputMessage, e); In this case I want to populate {}…
pjp
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What is the difference between Log4j, SLF4J and Logback?

I am little bit confused by these three logger libraries. It seems like that they can do the similar thing in Java logging...
Ev3rlasting
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How to send java.util.logging to log4j?

I have an existing application which does all of its logging against log4j. We use a number of other libraries that either also use log4j, or log against Commons Logging, which ends up using log4j under the covers in our environment. One of our…
matt b
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JUL to SLF4J Bridge

I'm currently observing that a 3rd party library (namely restfb) is using java.util.logging and I'm seeing those logs end up in STDOUT even though I don't have an SLF4J console appender configured in my logback.xml. I also have the jul-to-slf4j…
Taylor Leese
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Difference between slf4j-log4j12 and log4j-over-slf4j

What's the difference between slf4j-log4j12 and log4j-over-slf4j and when should each be used? org.slf4j slf4j-log4j12 1.7.12 …
Kumar Sambhav
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Spring Boot - no log file written (logging.file is not respected)

I use Spring Boot and want it to write log output to a file. According to the docs, this is simply done by setting logging.file=filename.log While the console output works fine, filename.log is not created. Also, if I create the file manually,…
Christoph Möbius
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Where does the slf4j log file get saved?

I have the followed imports: import org.slf4j.Logger; import org.slf4j.LoggerFactory; and the following instantiation: private static Logger logger = LoggerFactory.getLogger(Test.class); and the following in my Main method: logger.info("SOME…
user2763361
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Mocking Logger and LoggerFactory with PowerMock and Mockito

I have the following Logger I want to mock out, but to validate log entries are getting called, not for the content. private static Logger logger = LoggerFactory.getLogger(GoodbyeController.class); I want to Mock ANY class that is used for…
Mick Knutson
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What is the best way to unit-test SLF4J log messages?

I'm using slf4j and I want to unit test my code to make sure that warn/error log messages are generated under certain conditions. I'd rather these be strict unit tests, so I'd prefer not to have to pull up logging configuration from a file in order…
Javid Jamae
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How to enable debug in slf4j Logger?

How to globally enable debug for all the slf4j.Logger objects?
missingfaktor
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Is there a correct way to pass arguments in slf4j?

Im using slf4j for tracing the information. My code is private static final Logger log = LoggerFactory.getLogger(ObjectTest.class); log.trace("Time taken to store " + count + " objects of size " + size + " is " + (time) + "…
diya
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