Spring Boot SLF4j Logback example
by In this tutorial, we will show you how to use Logback in Spring Boot framework. Technologies used : Spring Boot 2.1.2.RELEASE, Spring 5.1.4.RELEASE, Logback 1.2.3, Maven 3, Java 8
Tag: logback
Spring Boot Test – How to disable DEBUG and INFO logs
Run the Spring Boot integration test or unit test, many annoying DEBUG and INFO logs are displayed in the console. To disable the logs, turn off the logging.level in both application.properties and logback-test.xml
Logback – Duplicate log messages
Review a simple Java application and log a message via Logback. Run above program, the Logback will logs a message twice? This is caused by the Appenders accumulate. To fix it, add a additivity=”false” to the application logger
How to stop logback status INFO at the start of every log?
The logback will output its own status (INFO or WARN) at the start of the program, it’s really annoying! To fix it, add a NopStatusListener in logback.xml
Logback – Disable logging in Unit Test
While the unit test is running in the IDE, the Logback is showing a lot of configuration or status like this. It is really annoying, especially for the failed test, because I need to scroll down manually for the error message! To fix it, create an empty configuration file as logback-test.xml, and save it under $project/src/test/resources. Alternatively, add a NopStatusListener
Logback – Set log file name programmatically
In Logback, it is easy to set a log file name programmatically : 1 – In logback.xml, declares a variable like ${log.name}, 2 – In Java, set the variable via System.setProperty(“log.name”, “abc”)
Logback – different log file for each thread
In this tutorial, we will show you how to use Logback Mapped Diagnostic Context (MDC) and SiftingAppender to create a separate log file for each thread.
logback.xml Examples
Here are a few logback.xml examples that are used in my projects, just for sharing. All logging will be redirected to console. All logging will be redirected to a file logs/app.log. Furthermore, this log file will be archived daily or when the file size is larger than 10MB. Send error logs to email. Logs Asynchronously that make logging faster. Send logs to a separate log file, the log file name is defined at runtime, via MDC. Set the log file name ${log.name} programmatically, via System.setProperty
SLF4J Logback Tutorial
A simple SLF4J with Logback example. Tested with: SLF4J API 1.7.25, Logback 1.2.3, Maven 3, Java 8. Note: Logback natively implements the SLF4J API.