Axon 框架：聚合标识符在应用事件后必须为非空

Question

使用轴突框架我遇到错误：

Aggregate identifier must be non-null after applying an event. Make sure the aggregate identifier is initialized at the latest when handling the creation event. I use this StorageEngine:

@Bean
public JdbcEventStorageEngine jdbcEventStorageEngine() throws Exception{
    return new JdbcEventStorageEngine(dataSource::getConnection, NoTransactionManager.INSTANCE);
}

当第二次收到 aggregateId 的消息时代码失败，就像在这个处理程序中一样：

@CommandHandler
public void handle(CreateProductCommand command) throws Exception {
    Aggregate<Product> productAggregate = null;
    try {
      productAggregate = repository.load(command.getId());
    } catch (AggregateNotFoundException exception) {
      logger.info("Aggregate with " + command.getId() + " is not found. Creating new one...");
      productAggregate = repository.newInstance(() -> new Product(command.getId()));
    }
    productAggregate.execute(product -> product.createProduct(command.getId()));
}

但是如果我使用它就可以正常工作：

@Bean
public EventStorageEngine eventStorageEngine() {
  return new InMemoryEventStorageEngine();
}

我应该如何为 postgres/mysql 数据库配置 eventStorageEngine？

Answer 1

删除 spring devtools 效果很好。

Axon 框架：聚合标识符在应用事件后必须为非空

Axon framework: Aggregate identifier must be non-null after applying an event

java

axon