So I have read the migration document on how you port code from Log4J to SLF4J Api, but I am still unclear what you do when your legacy code 3rd party dependencies have a dependency on Log4J. I obviously, don’t want my final executable jar file to contain the Log4J jar, so I can of course add an exclusi…
Tag: slf4j
Directing logging depending on call context in modular monolith web application
For some story, we used to have an application in microservices architecture, and all services included and used a common dependency library. It was later decided, the microservices approach wasn’t justified and had more overhead than benefit, and eventually was refactored into a modular monolith. Every…
Spring Boot – @Slf4j Logging Behavior differs in Test and in real Application
I have a sample class like this, I have written a test case like this, When I run this test the below items gets printed to console. But when I run the printLogLevel() from application like this, The below lines gets printed to console. Below are the dependencies I have used for this testing. and this is the …
How to solve “No SLF4J providers were found” when the “slf4j-api” and “slf4j-simple” are already imported?
I am using Guice in a gradle project. When running the main method, I got the following error: I did some research and added two dependencies in the dependencies section of the build.gradle file as shown below: But the error is still there… Do I need to bind the SLF4J provider with something via Guice? …
SLF4J/Java logging: Is it possible to add log arguments automatically?
Introduction We’re using SLF4J in combination with Logback in several Spring (Boot) applications and recently started using the logstash-logback-encoder to implement structured logging. As we also still have to support plain text logs, we wondered whether it was possible to append arguments automaticall…
SLF4J: Class path contains multiple SLF4J bindings warning
I’ve seen in other questions that usually the solution to this warning is to exclude slf4j from the dependency that causes this conflict, but I can’t spot the problem in my project. I run mvn dependency:tree command and this is the output: Answer You can solve the issue by adding the following exc…
Why is Log4j2 not logging inside Spring Boot Application?
I’m trying to use spring boot starter and spring boot starter web. So far I’ve got what I think is a pretty simple set up. I can see that the application is obviously finding and using the log4j2-spring.xml file so my question is why doesn’t anything from the MyRunner class log via log4j2? I…
logging in interface methods
I have been working on java 7 so far and recently moved to java-8, one thing which was surprising is that you can add methods in java-8 interfaces. So far so good….loved this new stuff! Now, my problem is that logging is an essential part of any development but seems lombok.extern.slf4j won’t let …
slf4j in library seems to ignore my log4j2 configuration
We use Log4j2 in our java-ee application. We use a library, where logging is programmed against SLF4J. In this library is a class, which logs a lot of stuff I do not want -> so I want to set LogLevel of this Logger to OFF. My log4j2.xml looks like this: But BaseSerializingTranscoder still logs errors. If I…
Logback conversion rule parametrizing
Is there any way of parametrizing conversion rule in Logback? I’ve tried adding child nodes, additional attributes and I don’t see a way to do it. I would like to add parameter that will be used by LongMessageConverter class. My application is setup on Spring Boot and I am using Sl4J. Answer This …