Re: How to have a single log4j.xml file in a multi-module project?

Sat, 13 Dec 2008 00:47:43 -0800 

google is your friend

look up cyclic reference
when you understand what one of them is, have a look at your project and see if you have a cyclic reference
here is a hint for you: the parent section of a pom does not have to be referencing the parent folders pom 

Sent from my iPod

On 13 Dec 2008, at 03:57, CheapLisa <l...@purpleblade.net> wrote:



OK, when I do this I get a cyclic reference and it does not work.

I have:
<project_root>/pom.xml <= this is referred to as my "parent pom" 

and I have a sub-module for logging (has only the
/src/main/resources/log4j.xml
   <project_root>/utils/logging/pom.xml
   <project_root>/utils/logging/src/main/resources/log4j.xml

   In the utils/logging/pom.xml I have this included
     <dependency>
         <groupId>log4j</groupId>
         <artifactId>log4j</artifactId>
         <version>1.2.15</version>
         <scope>compile</scope>
     </dependency>
so to use in every other project, I put in the top level (parent pom) this 
dependency on
   the logging sub-module:

   <dependencies>
   <dependency>
       <groupId>com.acme<groupId>
       <artifactId>logging</artifactId>
       <version>1.0</version>
       <scope>compile</scope>
   </dependency>
   </dependencies>


   and I do not touch any other module anywhere because in every pom
everywhere I have
   the following reference to the parent pom:

   <parent>
       <groupId>com.acme</groupId>
       <artifactId>acme.parent-pom</artifactId>
       <version>1.0</version>
   </parent>
so the parent pom dependency is logging-1.0.jar but the first thing it tries 
to compile also has
that dependency.


---
+ Error stacktraces are turned on.
[INFO] Scanning for projects...
[INFO]
--- --------------------------------------------------------------------- 
[ERROR] BUILD FAILURE
[INFO]
--- --------------------------------------------------------------------- [INFO] The projects in the reactor contain a cyclic reference: Edge between 
'Vertex{label='com.avoce
nt.amp.patch:utils.logging'}' and
'Vertex{label='com.acme.patch:utils.logging'}' introduces t
o cycle in the graph com.acme:utils.logging --> com.acme.patch:utils.logging 
[INFO]
--- --------------------------------------------------------------------- 
[INFO] Trace
org.apache.maven.BuildFailureException: The projects in the reactor contain 
a cyclic reference: Edge
between 'Vertex{label='com.acme.patch:utils.logging'}' and
'Vertex{label='com.acme:utils.logging'}' introduces to cycle in the graph 
com.acmepatch:utils.logging --> com.av
ocent.amp.patch:utils.logging
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java: 310) 
       at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:126)
       at org.apache.maven.cli.MavenCli.main(MavenCli.java:282)



Stephen Connolly-2 wrote:


In theory, yes, though I have not tried it myself

2008/12/11 CheapLisa <l...@purpleblade.net>



so I could make a module for it say logging/pom.xml and then put a
<dependency> to it in a parent pom that all sub-modules have as a
parent-pom
and this would work?

thanks

L



Stephen Connolly-2 wrote:
put it in a jar file (make a module just for it) and add that module 
as a dependency to all the projects that need it

Sent from my iPod

On 10 Dec 2008, at 20:35, CheapLisa <l...@purpleblade.net> wrote:
I have a project with many modules (over 30) and some are nested 2-3 
deep.
With Maven / Log4J I have to put two log4j.xml files in every module: 
  src/main/resources/log4j.xml
  src/test/resources/log4j.xml

  This is usually the same file over and over again.

  1)
  How can I have one single log4j.xml file for all tests
(src/test/resources/) and one log4j.xml file for
  all code (/src/main/resources/)

  2)
  How can I have one single log4j.xml file for all modules in the
project?

  thanks

  L
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