I'm currently working on [1], and the issue can be describe as below.
AF/AppCloud provides maven webapp archetype with preconfigured maven war
plugin, and we'll get following archetype structure,
├── pom.xml
├── src
│ └── main
│ ├── resources
│ └── webapp
│ ├── index.jsp
│ ├── META-INF
│ └── WEB-INF
│ ├── classes
│ ├── lib
│ └── web.xml
└── target
├── classes
├── sample_app.war
└── surefire
Executing following steps will reproduce the issue against the above app,
1. Add a dependency to the pom.xml and build it. Check the war file and you
will see the jar there.
2. Change the version of above dependency. Lets assume previous version is
1.0.0 and new one is 2.0.0. Build again.
3. When you check the built war file, you will see both versions inside it.
The reason for this behavior is, with the maven war plugin, there is a
webapp folder created. When we build the app, there is a *WEB-INF/lib*
directory
created inside that one and the jars (dependencies) are copied to it.
└── WEB-INF
│ ├── classes
│ ├── lib
│ │ └── dependancy-1.0.0.jar
│ └── web.xml
After executing the second step,
└── WEB-INF
│ ├── classes
│ ├── lib
│ │ ├── dependancy-1.0.0.jar
│ │ └── dependancy-2.0.0.jar
│ └── web.xml
When we rebuild (even with a maven clean install), those jars are not
getting cleaned and new jars are added.
Even when we remove these dependancies from pom.xml this jars will still
exists and will result in adding unnecessary jars into the artifact.
A possible solution would be we can add a maven clean plugin and clean the
content on the *WEB-INF/lib *directory while doing the mvn:clean.
But what if the user has other libraries and other content which are not
added by maven dependencies and still required. In that case we
can exclude [2] those in maven clean plugin.
WDYT about the this solution ? Or are there any possible solutions to
prevent this behavior ?
[1] https://wso2.org/jira/browse/APPFAC-3482
Thanks,
Kasun
*Kasun de Silva*
Software Engineer | *WSO2 Inc.*; http://wso2.com
lean.enterprise.middleware
email : [email protected]
mobile : +94 77 794 4260
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