Custom Properties Class

Support
1

I am aware of the various JMix and Spring Properties classes and how to inject them. But I am wondering how I could make my own Properties class. I’ve attempted on my own by copying an existing class, without success. I figure I am missing some nuance so any advice would be appreciated.

This is the class I attempted with, for reference:

package com.company.deiproductconfig2.core;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.context.properties.ConstructorBinding;
import org.springframework.boot.context.properties.bind.DefaultValue;

@ConfigurationProperties(prefix = "aspen")
@ConstructorBinding
public class AspenProperties {

    String buildDate;

    public AspenProperties(
            @DefaultValue("-UNKNOWN BUILD DATE-") String buildDate) {
        this.buildDate = buildDate;
    }

    public String getBuildDate(){
        return this.buildDate;
    }
}
2

Any help here? I suspect I need to register this class somewhere? Or it’s in the wrong directory?

3

Describe the problem.

4

The only other context I can give is the exception I get when opening the screen: java.lang.ClassNotFoundException: com.company.deiproductconfig2.core.AspenProperties.

I just don’t know why the class isn’t found. I dunno if I’m missing a step, as mentioned above.

5

Add @ConfigurationPropertiesScan to the main class of your application, it’s required for finding your config classes and making them beans.

However, java.lang.ClassNotFoundException is strange, it tells about a problem of a different layer. Like if there is no dependency between modules.

6

The @ConfigurationPropertiesScan worked. The other issue I had was that I had a .java file in my kotlin directory. One I moved it to my java directory, it worked.

As a side note, what would should the class declaration look like for a Kotlin properties file? I tried to use the covert to Kotlin tool in IntelliJ to generate the Kotlin class but when I ran the app, it seems Spring wasn’t able to find a constructor for the generated class? :man_shrugging:

I’d appreciate an example of a Kotlin properties class.