This jar file is
intended as a drop-in replacement for JCL version 1.1. 1
. It implements the public API of JCL but using SLF4J underneath, hence the name “JCL over SLF4J.” … The underlying logging framework can be any of the frameworks supported by SLF4J. Often times, replacing commons-logging.
What is SLF4J JCL?
SLF4J user manual. The
Simple Logging Facade for Java
(SLF4J) serves as a simple facade or abstraction for various logging frameworks, such as java. util. logging, logback and log4j. SLF4J allows the end-user to plug in the desired logging framework at deployment time.
Should I use log4j or SLF4J?
Best practice is to
use slf4j to for your own log statements
, and then choose the appropriate backend for it (including log4j as well by configuring to use log4j as a logging backend). Now all you have to choose, which logging framework you need to use in runtime.
Does SLF4J use log4j?
So essentially,
SLF4J does not replace log4j
; they both work together. It removes the dependency on log4j from your application and makes it easy to replace it in the future with the more capable library.
Should I use SLF4J?
This is the main purpose of SLF4J (Simple
Logging
Facade for Java) – a logging abstraction which helps to decouple your application from the underlying logger by allowing it to be plugged in – at runtime. Of course, the flexibility that such an abstraction provides is the main reason to use SLF4J.
What is SLF4J log4j12 used for?
4 Answers. slf4j-log4j12 provides a bridge between SLF4J and Log4j 1.2 so that SLF4J knows about
how to log
using Log4j. You are using Log4j 1.2. That version’s binding it is maintained by the SLF4J project.
What is SLF4J API?
Simple Logging Facade for Java
(abbreviated SLF4J) – acts as a facade for different logging frameworks (e.g. java. util. logging, logback, Log4j). It offers a generic API making the logging independent of the actual implementation. This allows for different logging frameworks to coexist.
Which is better log4j2 or Logback?
As in our first test,
Logback performed faster
in both synchronous and asynchronous logging when compared to Log4j 2 and JUL. … Log4j 2 saw a 35% drop in runtime over synchronous logging while Logback saw a 46% drop. However, this boost comes with a cost, and Logback dropped 36% of its messages in the process.
Is log4j2 better than Logback?
Key Difference Between Log4j vs Logback
Better versions: When we compare versions of log4j and logback, then
log4j is better than logback versions less than 1.2.
1. As logback is improved, version log4j and versions log4j2 and logback have no difference in terms of performance or any features.
What can I use instead of Log4j?
SLF4J, Logback, Logstash, Loki, and Seq
are the most popular alternatives and competitors to Log4j.
What is difference between log4j and log4j2?
Community support: Log4j 1. x is not actively maintained, whereas Log4j 2
has an active community where questions
are answered, features are added and bugs are fixed. Automatically reload its configuration upon modification without losing log events while reconfiguring.
How do you use log4j and SLF4J together?
- slf4j-api-1.6. jar.
- slf4j-log4j12-1.6. jar.
- log4j-1.2. jar.
Why do we need log4j?
log4j is a
tool to help the programmer output log statements to a variety of output targets
. In case of problems with an application, it is helpful to enable logging so that the problem can be located. With log4j it is possible to enable logging at runtime without modifying the application binary.
Is SLF4J logger thread safe?
util. logging.
Logger is thread-safe
(search for “multi-thread safe”)
How does SLF4J binding work?
When a library declares a compile-time dependency
on a SLF4J binding, it imposes that binding on the end-user, thus negating SLF4J’s purpose. The implementation is not bound at compile-time (it’s not a static/early binding) or in other words the implementation it’s not known at compile time.
What are loggers in Java?
A Logger object is
used to log messages for a specific system or application component
. Loggers are normally named, using a hierarchical dot-separated namespace. Logger names can be arbitrary strings, but they should normally be based on the package name or class name of the logged component, such as java.net or javax.
