How to combine javafx-maven-plugin and maven-assembly-plugin?

Question

I have a JavaFx project which I want to reduce to one jar file. My pom contains a java-fx plugin:

      <plugin>
            <groupId>com.zenjava</groupId>
            <artifactId>javafx-maven-plugin</artifactId>
            <version>8.1.4</version>
            <configuration>
                <mainClass>application.Main</mainClass>
                <jfxAppOutputDir>${project.build.directory}/jfx/app</jfxAppOutputDir>
            </configuration>
            <executions>
                <execution>
                    <id>create-jfxjar</id>
                    <phase>package</phase>
                    <goals>
                        <goal>build-jar</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>

and an assembly plugin:

            <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-assembly-plugin</artifactId>
            <version>2.4.1</version>
            <configuration>
                <!-- get all project dependencies -->
                <descriptorRefs>
                    <descriptorRef>jar-with-dependencies</descriptorRef>
                </descriptorRefs>
                <!-- MainClass in mainfest make a executable jar -->
                <archive>
                  <manifest>
                        <mainClass>application.Main</mainClass>
                  </manifest>
                </archive>

            </configuration>
            <executions>
              <execution>
                <id>make-assembly</id>
      <!-- bind to the packaging phase -->
                <phase>package</phase>
                <goals>
                    <goal>single</goal>
                </goals>
              </execution>
            </executions>
        </plugin>

When I call "mvn package" a single jar file is being build but it does not contain the jfx-jar file but contains some sort of "jar wihout jfx support"-version. How can I tell the Maven Assembly Plugin to use the jar version from the jfx plugin (which is located in jfxAppOutputDir (../jfx/app/))?

Answer 1

Found the problem myself.

1. the jar file with the "no main manifest attribute"-error was created by maven-jar-plugin. But it is possible to configure it to omit that creation. If you are interested please take a look: "what-is-the-best-way-to-avoid-maven-jar"
2. the assembly plugin worked correctly. It was my fault. I thought that the assembly plugin creates a jar file with all dependencies including all resource files(all files from the resource folder). My mistake. "jar-with-dependencies" includes all jars belonging to the project, nothing more.