Maven: Force the build to fail on a PMD violation 


The most important part is the binding of the plugin to a Maven phase. 


IDEA: External Tools as a Run Configuration?

Try the Run Configuration For External Tools-plugin.


The idea of an empty run configuration type is also provided by Batch Scripts Support– or BashSupport-plugin. So if you already use one of the bash plugins, you do not need my plugin.

IDEA: Build your own Tomcat integration for the free IntelliJ IDEA Community Edition

If you are using the free Community Edition of IntelliJ IDEA you probably noticed that there is no Tomcat support. The integration is included only in the commercial Ultimate Edition.

If won’t buy a license for whatever reason, you still can create some basic Tomcat integration even in the free IDEA Community Edition.

How to start the Tomcat from within the IDE?

Create an ‘External Tool’ configuration for the Tomcat
The command is catalina jpda run to start the tomcat in debug mode at the default port 8000.

Now the Tomcat can be started from several places within the IDE


and even the output of the process is printed to its run console.


Tip: If you want the External Tool to be integrated as a Run Configuration please checkout the other post and plugin.

How to start a debug session for started Tomcat?

Create a run configuration which starts a remote debugging session at localhost:8000


Switch to ‘Logs’ tab and configure that the log files are also integrated2017-06-04_13h04_52.png

After starting the run configuration, the debugger is attached to the Tomcat and the log files of the tomcat are shown within the IDE.


How to deploy a WAR file from a Maven based webapp to the Tomcat?

The steps are to run mvn war:war first to create the WAR and then to copy it to the webapp directory of the Tomcat.

One approach is to create a ‘Maven’ run configuration with the commandline: war:war org.codehaus.mojo:wagon-maven-plugin:upload-single -Dwagon.fromFile=FULL_PATH_TO_WAR_FILE -Dwagon.url=file://FULL_PATH_TO_TOMCAT\webapps\ (Don’t forget to change placeholders!)

This creates the WAR file and copies it to the Tomcat via the wagon-maven-plugin.

Other approaches could be:

  • Create a batch script (which invokes maven and copies the WAR), integrate it as an ‘External Tool’ configuration OR
  • Use the remote synchronizer plugin OR
  • Integrate an Ant target to copy the file OR
  • … more ideas at stackoverflow or here


IDEA: ‘Find duplicated classes in classpath’ plugin

In legacy projects sometimes a Java class (with the same fully qualified name) exists in several projects. If you combine these projects, you will never know, which class is used at runtime. It is like Maven dependency hell.

So I wrote a plugin to find out duplicated classes in the classpath. Get it here, but do not expect much support from me (because it is only a proof-of-concept).