No more commons-logging

Update 2007-10-10: No-commons-logging has been superseded by (backward compatible) Version 99 Does Not Exist.

Disclaimer
COMMONS-LOGGING VERSION 99.0-does-not-exist IS NOT IN ANY WAY AFFILIATED WITH THE ORIGINAL DEVELOPERS OF COMMONS-LOGGING NOR WITH APACHE.

Why no-commons-logging?
If you are using Maven you'll know it is practically impossible to move away from commons-logging (with its class-loading problems) and migrate to SLF4J. About every second pom declares it is dependent on commons-logging. Unfortunately Maven does not provide an easy way to exclude a certain package throughout your project. You will have to exclude commons-logging on each and every dependency you need (including transitive dependencies).

No-commons-logging is a Maven hack that allows you to exclude commons-logging from your application with a single piece of configuration.

How does no-commons-logging work?
No-commons-logging is a Maven2 package that mimics a commons-logging package with a high version number, but without any actual java code in the jar. This trick works because Maven allows you to specify a specific version for a dependency, and that version will then be used regardless of other dependency specifications.

Update 2007-07-22: Added package to mimic commons-logging-api as requested by Olivier Lamy.

How do you use no-commons-logging?
In your pom.xml include the following piece of xml:

<repositories>
    <repository>
        <id>no-commons-logging</id>
        <name>No-commons-logging Maven Repository</name>
        <layout>default</layout>
        <url>http://no-commons-logging.zapto.org/mvn2</url>
    </repository>
</repositories>
<dependencies>
    <!-- use no-commons-logging -->
    <dependency>
        <groupId>commons-logging</groupId>
        <artifactId>commons-logging</artifactId>
        <version>99.0-does-not-exist</version>
    </dependency>
    <!-- no-commons-logging-api, if you need it -->
    <dependency>
        <groupId>commons-logging</groupId>
        <artifactId>commons-logging-api</artifactId>
        <version>99.0-does-not-exist</version>
    </dependency>
    <!-- the slf4j commons-logging replacement -->
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>jcl104-over-slf4j</artifactId>
        <version>1.4.2</version>
    </dependency>
    <!-- the other slf4j jars -->
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>1.4.2</version>
    </dependency>
    <!-- using log4j as backend -->
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>1.4.2</version>
    </dependency>
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.14</version>
    </dependency>
</dependencies>

Disclaimer
COMMONS-LOGGING VERSION 99.0-does-not-exist IS NOT IN ANY WAY AFFILIATED WITH THE ORIGINAL DEVELOPERS OF COMMONS-LOGGING NOR WITH APACHE.