问题描述
我在尝试将 Axon 框架与 Spring boot 一起使用时收到 NoHandlerForCommandException: No Handler for command。
以下是我的 Java 文件:
Rest 控制器 ->
@RestController
@RequestMapping("/product")
public class ProductController {
@Autowired
private CommandGateway gateway;
@PostMapping
public ResponseEntity createProduct(@RequestBody CreateProductModel model) {
CreateProductCommand command=CreateProductCommand.builder()
.price("$123")
.productId(UUID.randomUUID().toString())
.product("Shoe")
.build();
String s=gateway.sendAndWait(command);
return new ResponseEntity<String>(HttpStatus.CREATED);
}
ProductCreatedEvent 对象 ->
import lombok.Data;
@Data
public class ProductCreatedEvent {
@TargetAggregateIdentifier
private String productId;
private String product;
private String price ;
}
命令类 CreateProductCommand ->
@Builder
@Data
public class CreateProductCommand {
@TargetAggregateIdentifier
private final String productId;
private final String product;
private final String price ;
}
聚合类 ->
@Aggregate
public class ProductAggregate {
@AggregateIdentifier
private String productId;
private String product;
private String price ;
public ProductAggregate() {
}
@CommandHandler
public ProductAggregate(CreateProductCommand command) {
//Todo: Validation logic can be handled here
ProductCreatedEvent event=new ProductCreatedEvent();
BeanUtils.copyProperties(command,event);
AggregateLifecycle.apply(event);
}
@EventSourcingHandler
public void on(ProductCreatedEvent event) {
this.price=event.getPrice();
this.productId=event.getProductId();
this.product=event.getProduct();
}
}
解决方法
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