AggregateTestFixture.registerIgnoredField忽略抽象父类字段失效问题问询

问题场景 #

抽象类AbstractUitworpAggregateEvent中的字段uitworpAggregateId无法被Fixture的registerIgnoredField()方法识别，但子类UitworpAggregateAanmakenEvent自身的字段gebeurtenisId可正常识别。

使用版本：

• Spring Boot 3.4.1
• Axon Framework 4.10.4
• Java 21

测试代码 #

FixtureConfiguration<MyAggregate> fixture = new AggregateTestFixture(MyAggregate.class);

@Test
void myTest(){
  fixture.registerIgnoredField(UitworpAggregateAanmakenEvent.class, "uitworpAggregateId");
}

事件类定义 #

@EqualsAndHashCode
@Getter
@SuperBuilder(toBuilder = true)
@ToString
public abstract class AbstractUitworpAggregateEvent {
    public UUID uitworpAggregateId;
    public UUID myAggregateId;
}

@EqualsAndHashCode(callSuper = true)
@Getter
@Jacksonized
@SuperBuilder(toBuilder = true)
@ToString(callSuper = true)
public class UitworpAggregateAanmakenEvent extends AbstractUitworpAggregateEvent {
    private final UUID gebeurtenisId;
}

问题根源 #

查看Axon Framework源码发现，org.axonframework.test.matchers.IgnoreField类的构造方法仅在传入的类本身查找字段，未遍历父类层级：

public IgnoreField(Class<?> clazz, String fieldName) {
    try {
        ignoredField = clazz.getDeclaredField(fieldName);
    } catch (NoSuchFieldException e) {
        throw new FixtureExecutionException("The given field does not exist", e);
    }
}

疑问与临时方案 #

将上述代码中的ignoredField = clazz.getDeclaredField(fieldName);修改为ignoredField = clazz.getSuperclass().getDeclaredField(fieldName);后，当前问题可解决，但存在以下疑问：

1. 该问题属于Axon Framework的Bug还是预期特性？
2. 上述修改方案是否正确，是否会引发其他潜在问题？

内容的提问来源于stack exchange，提问作者Jan