This is great!... but my quest to use slf4j as my logging solution is
still not fulfilled. The question now is why when I run 'mvn
package' or 'mvn jetty:run' when in the myblock directory does maven
insist on placing the commons-logging and log4j jar files into
WEB-INF/lib even though I've expressly excluded them?
What WEB-INF/lib directory are you referring to? Is it
./target/rcl/webapp/WEB-INF/lib or is it the WEB-INF/lib directory of
the web application Maven module?
If it is the first, the answer is that the wrapper web application (a
minimal web application that wraps a block) uses the reloading
classloader (commons-jci.jar) which has a dependency on commons-logging.
It is the first.
I don't understand... if the wrapper web application depends on
commons-logging and makes arrangements to load the commons-logging jar
into the classpath it should clash when I attempt to load the
jcl-over-slf4j jar file which is supposed to replace the classes in
commons-logging so that messages get forwarded to the slf4j logging
framework... but they don't!
If I change the dependencies section of myblock/pom.xml to the
following, then when I run mvn jetty:run I get bucketloads of debug
messages on my console... which I think means SLF4J is working... or
maybe I'm deceiving myself!
<dependencies>
<dependency>
<groupId>org.apache.cocoon</groupId>
<artifactId>cocoon-core</artifactId>
<version>2.2.0</version>
<exclusions>
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
<exclusion>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.cocoon</groupId>
<artifactId>cocoon-servlet-service-components</artifactId>
<version>1.0.0</version>
</dependency>
<dependency>
<groupId>org.apache.cocoon</groupId>
<artifactId>cocoon-template-impl</artifactId>
<version>1.1.0</version>
</dependency>
<dependency>
<groupId>org.apache.cocoon</groupId>
<artifactId>cocoon-flowscript-impl</artifactId>
<version>1.0.0</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.4</version>
<scope>provided</scope>
</dependency>
<!-- Logging related dependencies -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>1.5.2</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>log4j-over-slf4j</artifactId>
<version>1.5.2</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.5.2</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>0.9.9</version>
</dependency>
</dependencies>
Regards,
David Legg
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