how to configure main class path in tanuki wrapper for spring boot

Question

I am using a spring boot application and after build my project using maven, i can see a jar file of my application with maintaining following folder structure

buddika@buddika-pc:~/Desktop/visitor-tracking-automation-api-server/bin$ ll /home/buddika/Desktop/api-0.0.1-SNAPSHOT/
total 32
drwxrwxr-x  6 buddika buddika  4096 Sep 18 22:51 ./
drwxr-xr-x 33 buddika buddika 12288 Sep 18 23:14 ../
drwxr-xr-x  4 buddika buddika  4096 Sep 18 22:08 BOOT-INF/
drwxr-xr-x  3 buddika buddika  4096 Sep 18 22:08 META-INF/
drwxr-xr-x  3 buddika buddika  4096 Sep 18 22:08 org/

but problem is in tanuki wrapper. it is not identify this (BOOT-INF/classes/com/visitor/tracking/automation/api/boot/APIServerStart) folder structure.

instead above folder structure of jar, it is expecting following folder structure. I manually brought "com" folder to the front from BOOT-INF. that time wrapper is identify the main class and worked

buddika@buddika-pc:~/Desktop/visitor-tracking-automation-api-server/bin$ ll /home/buddika/Desktop/api-0.0.1-SNAPSHOT/
total 32
drwxrwxr-x  6 buddika buddika  4096 Sep 18 22:51 ./
drwxr-xr-x 33 buddika buddika 12288 Sep 18 23:14 ../
drwxr-xr-x  4 buddika buddika  4096 Sep 18 22:08 BOOT-INF/
drwxr-xr-x  3 buddika buddika  4096 Sep 18 22:08 com/
drwxr-xr-x  3 buddika buddika  4096 Sep 18 22:08 META-INF/
drwxr-xr-x  3 buddika buddika  4096 Sep 18 22:08 org/

my question is how to configure this main class path without manually bring the "com" package to front.

is there a way to make the jar by bring "com" package to front without putting in to "BOOT-INF"

following configurations were used in wrapper.conf file

wrapper.java.command=java
wrapper.working.dir=..
wrapper.java.mainclass=com.visitor.tracking.automation.api.boot.APIServerStarter
set.default.REPO_DIR=lib
set.default.APP_BASE=.

Answer 1

What worked for me was setting the Main class to org.springframework.boot.loader.JarLauncher instead of my application's Main class.

The documentation for JarLauncher says:

Launcher for JAR based archives. This launcher assumes that dependency jars are included inside a /BOOT-INF/lib directory and that application classes are included inside a /BOOT-INF/classes directory.

This way, you don't have to move your package to the root of the jar—the "org" folder shown in your screenshots should already have the path to JarLauncher.