Dependency management for SLF4J and Logback

Question

I'd like to start using SLF4J with Logback. I read over Logback's online documentation and am now ready to add the JARs to my repo and try it out.

But I'm at a loss! What JARs do I need? I downloaded that latest SLF4J (1.7.5) and expected to see something like slf4j-logback.jar, but don't see anything of the sorts. I've read that Logback contains a "native implementation" of SLF4J, but don't know exactly what this means, or if it also implies that I don't even need slf4j-api-1.7.5.jar on the classpath.

So I ask: to use the latest Logback (1.0.13), what JARs do I need? I took a look at the Maven central repo for logback 1.0.13 and don't see any dependencies listed, so that didn't help me at all. Thanks in advance!

Solution

You need to add logback-classic to your pom

    <dependency>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-classic</artifactId>
        <version>1.0.13</version>
    </dependency>

it will transitively add the following two:

<dependency>
    <groupId>ch.qos.logback</groupId>
    <artifactId>logback-core</artifactId>
    <version>1.0.13</version>
</dependency>

and

<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-api</artifactId>
    <version>1.7.5</version>
</dependency>

See https://logback.qos.ch/setup.html#mavenBuild for more information.

Comments

[Kanagavelu Sugumar]

Thanks! but is also expecting org.codehaus.groovy/groovy-all ? any idea ..?

[Steve Goossens]

You probably just need to add the optional dependency: <dependency> <groupId>org.codehaus.groovy</groupId> <artifactId>groovy-all</artifactId> <version>2.4.0</version> </dependency> source: logback.qos.ch/setup.html#mavenBuild

[Tyron]

Thank you, I have been trying to figure this out for hours!