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From Patrick Turcotte <>
Subject Re: Misunderstanding modules: "Two or more projects in the reactor have the same identifier"
Date Tue, 07 Jan 2014 13:25:52 GMT

We are doing something similar with what I call an assembly project.

I have the following structure:

   - pom.xml
   - projectA
     - pom.xml
   - projectB
     - pom.xml
   - projectC
     - pom.xml
   - projectX
     - pom.xml

Where the assembly's pom.xml contains like:


And dependencies between projects are set within each module (versions 
may be in a parent pom)

Then, in my "assembly" project, I do
mvn install

Or, with multiple windows open, I would do a mvn install for projectA 
and then switch to projectX and build it.

Hope this helps.


On 07/01/14 12:49 AM, Barrie Treloar wrote:
> On 7 January 2014 15:29, Mark Derricutt <> wrote:
>>>> When the project is relatively new and the internally-developed dependency
>>>> "A" is no where near being mature, nearly every change being made to
>>>> "Project X" requires a corresponding change to A. At this point in the
>>>> development cycle (and for many months in the foreseeable future) I actually
>>>> /do/ need to rebuild A every time I build X.
>> What I've often done here is create a new workspace area that contains symlinks (
or git submodule checkouts ) of each of the modules I'm working on, and having a simple pom.xml
in the top level that sets up a reactor build, then just build that.
> There was also some talk about automating this step.
> But its vapourware at the moment.
> It would work by checking your current pom for any -SNAPSHOT
> dependencies and then pulling out the source code for those and
> sitting them in the parent directory.
> And as you say the parent pom is just a helper that has a bunch of
> modules to make building things easier - and you would never check
> that pom into version control.
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