plantuml-maven-plugin 7954 seems not to support new activity syntax

Question

Hi,

I' trying something like

@startuml

start
     :suche mit Name und PLZ;
     if (Mandant gefunden) then (nein)
         :suche mit Name und Ort;
     else (ja)
         if (genau ein Mandant) then (nein)
             :filtere Mandanten mit Ort;
             if (genau ein Mandant) then (nein)
                 :filtere Mandant weiter mit Strasse;
                 if (genau ein Mandant) then (nein)
                     :setze null als Returnwert;
                 endif
              endif
          endif
    endif
    stop

@enduml

and it works fine using eclipse, but maven plugin reports

@startuml

start
:suche mit Name und PLZ;
^^^^^^^^^^^^^^^^^^^^^^^^
 Syntax Error?

Answer 1

That's because the new activity syntax has been released after V7954.

You should use https://github.com/jeluard/maven-plantuml-plugin/issues to report issues on this plugin.

Anyway, https://github.com/jeluard/maven-plantuml-plugin/blob/master/README.md has just been updated by Julien Eluard (thanks Julien).

You can now specify a version of PlantUML to be able to use latest release :

<build>
  <plugins>
    <plugin>
      <groupId>com.github.jeluard</groupId>
      <artifactId>plantuml-maven-plugin</artifactId>
      <version>7941</version>
      <configuration>
        <sourceFiles>
          <directory>${basedir}</directory>
          <includes>
            <include>src/main/plantuml/**/*.txt</include>
          </includes>
        </sourceFiles>
      </configuration>
      <dependencies>
        <dependency>
          <groupId>net.sourceforge.plantuml</groupId>
          <artifactId>plantuml</artifactId>
          <version>7976</version>
        </dependency>
      </dependencies>
    </plugin>
  </plugins>
</build>
 

Comments

plantuml-maven-plugin is no longer maintained and the plugin breaks after version PlantUML v8031(ish)
```
Caused by: java.lang.IncompatibleClassChangeError: Found interface net.sourceforge.plantuml.GeneratedImage, but class was expected
    at com.github.plantuml.maven.PlantUMLMojo.execute(PlantUMLMojo.java:191)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
```


but you can use the maven exec plugin instead
```
 <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>exec-maven-plugin</artifactId>
                <version>1.5.0</version>
                <executions>
                    <execution>
                        <id>default-cli</id>
                        <goals>
                            <goal>java</goal>
                        </goals>
                        <phase>verify</phase>
                        <configuration>
                            <mainClass>net.sourceforge.plantuml.Run</mainClass>
                            <arguments>
                                <argument>-o</argument>
                                <argument>${basedir}/target/plantuml</argument>
                                <argument>${basedir}/documentation/**/*.puml</argument>
                            </arguments>
                            <includePluginDependencies>true</includePluginDependencies>
                            <includeProjectDependencies>false</includeProjectDependencies>
                            <executableDependency>
                                <groupId>net.sourceforge.plantuml</groupId>
                                <artifactId>plantuml</artifactId>
                            </executableDependency>
                        </configuration>
                    </execution>
                </executions>
                <dependencies>
                    <dependency>
                        <groupId>net.sourceforge.plantuml</groupId>
                        <artifactId>plantuml</artifactId>
                        <version>8057</version>
                    </dependency>
                </dependencies>
            </plugin>
```

---

GeneratedImage used to be an class and is now an interface.
Not sure to understand why it breaks the plugin. DId you have the last version of it (PlantUMLMojo.java:191 does not seem to match a code line).

We are also not maintaining this project. Maybe you could write to some contributors ( https://github.com/jeluard/maven-plantuml-plugin ) :
Fixing this should not be a big issue.

Sorry that we cannot do more!