Maven - several modules for one package
I have a web app that I would like to split into three pieces. I noticed it has two completely distinct functionalities, but the core architecture (libs used in presentation layer, Spring container, DAO etc.) is shared.开发者_开发知识库
One piece would be the "master", with full vertical stack from presentation through DAO, but only for what's common for all "subprojects".
The other two modules would be the "subprojects" themselves.
Now the question is: Is it possible to get Maven to treat all 3 pieces (modules?) as one, so that they would be built and most importantly packaged together? I need the final result to be a single war with directory tree similar to:
war
+ WEB-INF
+ classes
+ subproject1
+ subproject2
+ view-shared
+ css
+ ...
+ js
+ ...
+ subproject1
+ myPage.jsp
+ subproject2
+ anotherPage.jsp
You get the idea.
You can do it using the Maven assembly plugin.
Another solution is to have:
- A
common
project (packagingjar
) - A
subproject1
(packagingwar
) that hascommon
as dependency. - A
subproject2
(packagingwar
) that hascommon
as dependency. - Finally, a
web
project (packagingwar
) that has bothsubproject1
andsubproject2
as dependencies.
When Maven will build the web
project, it will first unzip both subproject1
and subproject2
wars in the web/target
directory, and then copy the content of the web
project itself in this target
directory.
This means that if a file exists in subproject1
and in web
projects, then the file hosted by web
will erase the one hosted by subproject1
in the final WAR file.
You can find more information about Maven WAR overlays.
Yes, you can do that with the maven assembly plugin. Build separate maven modules for all three, plus a forth module that depends on the other modules and uses the assembly plugin to build the structure you need.
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