mvn spring-boot:run "No primary or single public constructor found...TemplateLineItemInput" but only from commandline? - spring-boot

Question

I've got an up-the-middle Spring Boot + Lombok project that works like a champ from the IDE but errors strangely when I run it from the command line through mvn spring-boot:run. Its a pretty recent version Spring Boot...
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.5.4</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
Lombok is unremarkable and came from the Spring Initializr thing (https://start.spring.io/).
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
The JavaBean its complaining about is equally boring...
import lombok.Builder;
import lombok.Data;
import java.math.BigDecimal;
#Data
#Builder(toBuilder = true)
public class TemplateLineItemInput {
private final String partMasterId;
private final String partMasterIdPath;
private final String actionType;
private final BigDecimal actionQuantity;
}
The API of this Boot project is GraphQL but when I execute the following mutation from a mvn spring-boot:run invocation it always comes back as an error (nothing on the console...the framework is kicking it out somehow).
Request...
mutation createTemplateLineItem($tbomId: ID!) {
createTemplateLineItem(
tbomId: $tbomId
input: {
partMasterId: "2"
partMasterIdPath: "808863036.1"
actionType: "ADD"
actionQuantity: "2"
}) {
...TBomFrag
}
}
...
{
"partMasterId": "5025489768",
"tbomId": "a4688d22-9d99-41a2-9777-6acc75b2aab9",
"lineItemId": "9e460199-34fb-432c-b971-8cd8321d3283"
}
Response...
{
"errors": [
{
"message": "No primary or single public constructor found for class aero.blue.ems.boa.domain.TemplateLineItemInput - and no default constructor found either",
"locations": [
{
"line": 20,
"column": 3
}
],
"path": [
"createTemplateLineItem"
],
"extensions": {
"classification": "INTERNAL_ERROR"
}
}
],
"data": {
"createTemplateLineItem": null
}
}
My spring-boot-maven-plugin is configured like...
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>2.5.4</version>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
<executions>
<execution>
<id>repackage</id>
<configuration>
<classifier>exec</classifier>
</configuration>
</execution>
<execution>
<goals>
<goal>build-info</goal>
</goals>
</execution>
</executions>
</plugin>
...also from Spring Initializr
When I run the Application from the IDE directly, no issue. The mutation works fine.
Is there something missing from my spring-boot:run config in the pom.xml or something? Did I have to clue the plugin into annotation processing? This is really confusing.

Answer 1

Please,
Check the following config on section plugins at you pom.xml project, as following here:
<project>
<modelVersion>4.0.0</modelVersion>
<artifactId>getting-started</artifactId>
<!-- ... -->
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
For more information about, check this link: https://docs.spring.io/spring-boot/docs/2.5.4/maven-plugin/reference/htmlsingle/

Answer 2

Ultimately this comes down to Lombok misconfiguration of my beans. The fix is to add the #AllArgsConstructor to the bean definition
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import java.math.BigDecimal;
#Data
#Builder(toBuilder = true)
#AllArgsConstructor
public class TemplateLineItemInput {
private final String partMasterId;
private final String partMasterIdPath;
private final String actionType;
private final BigDecimal actionQuantity;
}
How we figured this out was to "Delombok" the Bean and look at the resulting code. This observation matched the error message; there was no public constructor.
...
TemplateLineItemInput(String partMasterId, String partMasterIdPath, String actionType, BigDecimal actionQuantity) {
this.partMasterId = partMasterId;
this.partMasterIdPath = partMasterIdPath;
this.actionType = actionType;
this.actionQuantity = actionQuantity;
}
Somehow (I still don't fully get why), the #Builder(toBuilder=true) annotation had Lombok producing a package private constructor. Jackson needed something public.
Adding the #AllArgsConstructor annotation made that constructor public and all is well.
public TemplateLineItemInput(String partMasterId, String partMasterIdPath, String actionType, BigDecimal actionQuantity) {
this.partMasterId = partMasterId;
this.partMasterIdPath = partMasterIdPath;
this.actionType = actionType;
this.actionQuantity = actionQuantity;
}
Delombok was the key.