Nested use of @ConfigurationBuilder; Another config object inside ConfigurationBuilder

[subash89]

Hi,
This ConfigurationBuilder example works fine. (AWSConfig class is outside AppConfig, so using ConfigurationBuilder as follows).
My question is, I need a new Object field of Metadata in AWSConfig class. (commented out).

How AWSConfig.Builder can have another object Metadata ? (cannot think of how to use a nested ConfigurationBuilder or ConfigurationProperties for this)

@ConfigurationProperties("app.main")
public class AppConfig {

    @ConfigurationBuilder(configurationPrefix = "aws")
   private AWSConfig.Builder builder = AWSConfig.builder();

   public void setBuilder( AWSConfig.Builder builder ){
    this.builder=builder;
  }

} 

public class AWSConfig {
    private String region;

  // private Metadata metadata;
     
   public AWSConfig(String region){
     this.region = region;
   }  

  public static class Builder{

      private String region;
      
       public Builder setRegion(String region){
             this.region=region;
             return this;
       }

      public AWSConfig build(){
         return new AWSConfig(region);
      }  
 }

      public static Builder builder(){
        return new Builder();
      }

}

public class Metadata {
   private String account;
   
    public String getAccount(){
    return account;
     }

     public void setAccount(String account){
     this.account=account;
     }

}

[subash89]

Changed the subject also a bit if I am not making it clear. All examples I see with ConfigurationBuilder is to build something with java literals. But I have another object in that Builder as in above example.(commented out Metadata object). Is this even possible ?

[dstepanov]

There is an example in the configuration of how to use a custom converter https://docs.micronaut.io/latest/guide/#customTypeConverter

[subash89]

@dstepanov In this example, the source type(Map) is given as a programatically added linked hash map at Application run.
Can type converter pickup something in application.yml

[dstepanov]

It should pickup the map of the configuration at that property location

[subash89]

it does not(for me). It works only when I manually pass a manually created HashMap to the ApplicationContext.run(Map).
If you tried it, do you have an example for me to look?

[subash89]

@dstepanov Expect following map style yaml block to picked up as a Source type map by the converter.

myconfig: 
    metadata:
      account: abc123

Instead what works now is manually input map

    ApplicationContext ctx  = Micronaut.build(args)
              .mainClass(Application.class)
              .properties(new LinkedHashMap<String, Object>() {{
                  put("myconfig.metadata",
                          new LinkedHashMap<String, String>() {{
                              put("account", "abc123");
                          }}
                  );
              }})
              .start();

[subash89]

@dstepanov I tried source type List and TypeConverter getting invoked and it works. When I use Map like above, my typeconverter not getting invoked. (verified by, debug pointer not getting hit).

[subash89]

From my observation, this works directly inside an object with @ConfigurationProperties() and mapped into a map of objects. Not nested inside child objects.