In order to use another logging package I need to ensure commons-logging
and log4j jar files are not in the class path. I cannot get Maven to
exclude them. I'm using Maven 2.0.9.
Here's the scenario: -
Following the Cocoon tutorial [1] I created a Cocoon block called
'myblock' (number 2 on the list of archetypes)
If I change into the 'myblock' folder and run 'mvn package' I notice the
following lines in the output: -
...
[INFO] [cocoon:prepare {execution: prepare}]
[INFO] Preparing a Cocoon web application.
[INFO] Deploying string-template to WEB-INF/log4j.xml
[INFO] Adding lib to WEB-INF/lib: commons-logging:commons-logging:1.1:jar
[INFO] Adding lib to WEB-INF/lib:
org.apache.commons:commons-jci-core:1.0:jar
[INFO] Adding lib to WEB-INF/lib: commons-io:commons-io:1.3.1:jar
[INFO] Adding lib to WEB-INF/lib: log4j:log4j:1.2.14:jar
...
That means those jar files will be in the classpath when the web app is run.
So, then I edit the myblock/pom.xml file and add '<exclusion>' tags to
all the dependencies I can see like this: -
<project>
...
<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>
</exclusions>
</dependency>
...
</dependencies>
...
</project>
When I run 'mvn clean package' I get exactly the same results!
When I use the mvn -X parameter to see the debug output as maven runs I
get the impression that the maven plugins seem to be adding dependencies
to the dependency tree: -
...
[DEBUG] Retrieving parent-POM: org.apache.cocoon:cocoon::6 for
project: null:cocoon-tools-modules:pom:6 from the repository.
[DEBUG] Adding managed dependencies for unknown:cocoon-maven-plugin
...
[DEBUG] commons-logging:commons-logging:jar:1.1
...
I suppose I could start fiddling with plugin exclusions but this is
getting silly. Do I really have to work this hard to try to make sure a
jar file isn't included in the classpath?
Regards,
David Legg
[1] http://cocoon.apache.org/2.2/1159_1_1.html
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