Spring Boot - How to specify an alternate start-class? (Multiple Entry Points)

I want to add an alternate entry point to my Spring-Boot application. I would prefer to keep this as a fat jar. Is this possible?

According to their documentation, the property loader.main specifies the name of the main class to launch.

I tried java -jar MyJar.jar --loader.main=com.mycompany.AlternateMain but the start-class specified in my pom.xml was still run (and if I remove this from the pom.xml then I error during the packaging).

Alternatively, I tried java -cp MyJar.jar com.mycompany.AlternateMain but I don't know of a good way to add all the nested jars to the classpath.

Any suggestions?

Edit: Here is the solution that I used

As jst suggested, I changed my launcher to use the PropertiesLauncher. I did this by modifying the configuration of my spring-boot-maven-plugin.

<plugin>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-maven-plugin</artifactId>
  <configuration>
    <mainClass>${start-class}</mainClass>
    <layout>ZIP</layout>
    ...

The <layout>ZIP</layout> triggers Spring Boot to use the PropertiesLauncher.

I created my fat jar (mvn package) then called the alternate main like this:

java -jar -Dloader.main=com.mycompany.AlternateMain MyJar.jar

Thanks for the help!