Here's my critiques of your poms:
parent:
looks ok
common
add <groupId>com.fairisaac.mbpa</groupId> after <modelVersion/>
add <version>7.0</version> after <name/>
add <packaging>jar</packaging> after <version/>
dataaccess
add <groupId>com.fairisaac.mbpa</groupId> after <modelVersion/>
add <version>7.0</version> after <name/>
Probably, the only thing you really absolutely need is the
<packaging/> element in common.
Finally, you need to run "mvn install" from the top level/parent
directory before it will succeed from any of the subdirectories.
Wayne
On 6/1/07, Tawfik, Sameh E <[EMAIL PROTECTED]> wrote:
Hi Wayne,
I'm using "Better Builds With Maven", and I followed the example in
chapter 3, but I still get the same error! I must be missing something
or not set something correctly? But, I'm not sure what?
Attached are my three pom files, the parent and the two sub ones. I made
copies and renamed them, so it would be easy to differentiate them.
I think the source of this problem is following code that I copied from
the manual and added it to the parent pom file:
This is from the manual, "For example, you may want to configure the
Java compiler to allow JDK 5.0 sources. This is as simple as adding the
following to your POM:"
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.0</version>
<configuration>
<source>1.5</source>
<target>1.5</target>
</configuration>
</plugin>
</plugins>
</build>
If I remove the above code, I got compilation errors. The interesting
issue, that same code does not cause any problem, when I build the first
module?
As I specified before, I can build the first module with no problem, but
when I try to build the second module that depends on the jar of the
first build module, it fails with the following error:
C:\SVN_DB\MBPA\mbpa-dataaccess_impl>mvn install
[INFO] Scanning for projects...
[INFO]
------------------------------------------------------------------------
----
[INFO] Building mbpa-dataaccess_impl
[INFO] task-segment: [install]
[INFO]
------------------------------------------------------------------------
----
[INFO] [resources:resources]
[INFO] Using default encoding to copy filtered resources.
Downloading:
http://repo1.maven.org/maven2/com/fairisaac/mbpa/mbpa/7.0/mbpa-7.0.pom
[INFO]
------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO]
------------------------------------------------------------------------
[INFO] Failed to resolve artifact.
GroupId: com.fairisaac.mbpa
ArtifactId: mbpa
Version: 7.0
Reason: Unable to download the artifact from any repository
com.fairisaac.mbpa:mbpa:pom:7.0
from the specified remote repositories:
central (http://repo1.maven.org/maven2)
Thanks,
Sameh
-----Original Message-----
From: Wayne Fay [mailto:[EMAIL PROTECTED]
Sent: Thursday, May 31, 2007 6:13 PM
To: Maven Users List
Subject: Re: Dependency and groupId?
You pick your own groupId for all your own projects. We generally
suggest the groupId be basically your domain backwards -- a.b.com
becomes com.b.a.
In this case, I would probably use com.fairisaac.mbpa as the groupId
for my artifacts, as it seems like mbpa is perhaps your project name.
Then I would use artifactId values like mcd, dataaccess-impl, etc.
If you don't specify a groupId, Maven assumes
org.apache.maven.plugins. This is why you're running into these
problems.
You should probably read the Better Builds With Maven free PDF since
it sounds like you're just starting out with Maven2 -- it covers a lot
of these introductory topics.
Wayne
On 5/31/07, Tawfik, Sameh E <[EMAIL PROTECTED]> wrote:
>
> Hi,
>
> I'm using Maven version: 2.0.6.
>
> My project has few modules; I created the parent pom.xml file, and
> pom.xml for each module.
>
> I'm able to compile the first module, but when I try to compile the
> second module that depends on the first module jar file, I get the
> following error:
>
> [INFO] Building mbpa-dataaccess_impl
> [INFO] task-segment: [compile]
> [INFO]
>
------------------------------------------------------------------------
> ----
> [INFO] [resources:resources]
> [INFO] Using default encoding to copy filtered resources.
> Downloading:
>
http://repo1.maven.org/maven2/org/apache/maven/plugins/mcd/7.0/mcd-7.0.p
> om
> [INFO]
>
------------------------------------------------------------------------
> [ERROR] BUILD ERROR
> [INFO]
>
------------------------------------------------------------------------
> [INFO] Failed to resolve artifact.
>
> GroupId: org.apache.maven.plugins
> ArtifactId: mcd
> Version: 7.0
>
> Reason: Unable to download the artifact from any repository
>
> org.apache.maven.plugins:mcd:pom:7.0
>
> from the specified remote repositories:
> central (http://repo1.maven.org/maven2)
>
> Whatever value I set for the gorupId, when I try to compile maven
> attempts to download the needed .pom file, and it fails?
>
> So, I'm not sure what to set the goupId to? And how to make maven
> reference the jar that was built when it compiled the first module?
>
> groupId - This element indicates the unique identifier of the
> organization or group that created the project. The groupId is one of
> the key identifiers of a project and is typically based on the fully
> qualified domain name of your organization. For example
> org.apache.maven.plugins is the designated groupId for all Maven
> plugins.
>
> Can someone let me know what I'm missing or doing wrong?
>
> Thanks,
>
> Sameh
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