而且,version判断是在部分属性赋值的时候。
@Nullable
public OrderEntity copy() {
OrderEntity entity = new OrderEntity();
int ver = this.version;
entity.status = this.status;
entity.unfilledQuantity = this.unfilledQuantity;
entity.updatedAt = this.updatedAt;
if (ver != this.version) {
return null;
}
entity.createdAt = this.createdAt;
entity.direction = this.direction;
entity.id = this.id;
entity.price = this.price;
entity.quantity = this.quantity;
entity.sequenceId = this.sequenceId;
entity.userId = this.userId;
return entity;
是为了确保复制的时候数据一致性,如果复制了status后status改了,再复制unfilledQuantity他俩就不是一个时刻的了
后面复制的是不变数据,不需要判断一致性
Sign in to make a reply
何霖
而且,version判断是在部分属性赋值的时候。
@Nullable
public OrderEntity copy() {
OrderEntity entity = new OrderEntity();
int ver = this.version;
entity.status = this.status;
entity.unfilledQuantity = this.unfilledQuantity;
entity.updatedAt = this.updatedAt;
if (ver != this.version) {
return null;
}
entity.createdAt = this.createdAt;
entity.direction = this.direction;
entity.id = this.id;
entity.price = this.price;
entity.quantity = this.quantity;
entity.sequenceId = this.sequenceId;
entity.userId = this.userId;
return entity;
}