spring-boot-start | 通过spring boot实现自己的start工程

Starting with the sample from https://docs.gradle.org/current/samples/sample_jvm_multi_project_with_code_coverage.html (i.e., the code here https://github.com/gradle/gradle/tree/master/subprojects/docs/src/samples/java/jvm-multi-project-with-code-coverage ) and simply adding Spring Boot by changing application/build.gradle to

I am not able to generate log file using log4j2 spring boot 2.4, it's only printing logs in eclipse console. I already tried multiple solutions provided across web like: exclusions, renamed file to log4j2, changed properties multiple times (some are not using log4j.xx and some are not using it) not sure what to do ?

properties file:

I have a spring boot 2 app which connects to Mariadb database. This app runs in cloud foundry. It takes database connection properties from VCAP_* env variable.

App works fine and can connect to database. But, I have found out that app is not using hikari configuration specified in application.yml.

Can you please suggest what is wrong here?

build.gradle

I am new to spring boot and trying to figure out some of its working. Here I am getting Null Pointer Exception for the below implementation. I am not sure can we use @Autowire annotation for a Library project without a Main class. Maybe this sounds stupid,I believe we can do a @ComponentScan for the Library Project from a Service project that's created.My Question is looking at the below implementation is there any possibility to use annotation in the below library project, because Annotations are throwing NullPointerException for the below code?

Library

The below code is a library and it Doesn't have a Main Class

I'm trying to run one test for my class "Sinus" (used to compute the sinus of a float), but when I try to run this test to generate my coverage report with Cobertura, it doesn't work and I really don't know why ! Dou you have advices or any explanation please ? (I use the cmd : mvn cobertura:cobertura)

-This is my test:

I used to have this @Configuration class that extends AbstractMongoConfiguration.

I want to upgrade to

After the Spring Boot 2.5.0 update, it generates the myprogram-0.0.1-plain.jar file alongside the usual myprogram-0.0.1.jar. Can I disallow gradle to generate the *.plain.jar file? I use Gradle 7.0.2.

What I get:

I am invoking the CommandGateway.send method from my rest controller but the control is not going into the Aggregate class and after 5 mins 500 internal server error is coming. When i debugged the application I found the below error is thrown by Axon ->

AxonServerRemoteCommandHandlingException{message=An exception was thrown by the remote message handling component: , errorCode='AXONIQ-4002', server=''}

Below are my Java files :

The Rest controller ->

I am trying to create my first project movie repository using Spring Boot + RestAPI + JPA + CrudRepository +MySQL.I am getting huge stack trace which is very difficult to understand.

Entity class: