使用 BrokeredMessage 从 Azure 服务总线队列 (v1) 反序列化强类型对象

Question

无论出于何种原因，我似乎无法弄清楚如何将我的对象从我的队列中拉出来并将其反序列化回它放入其中的内容（An AccountEventDTO ).

Azure 函数成功将对象放入队列：

[FunctionName("AccountCreatedHook")]
public static async Task<HttpResponseMessage> Run([HttpTrigger(AuthorizationLevel.Function, "post", Route = null)]HttpRequestMessage req,
    TraceWriter log, [ServiceBus("topic-name", Connection = "BusConnectionString", EntityType = Microsoft.Azure.WebJobs.ServiceBus.EntityType.Topic)] IAsyncCollector<BrokeredMessage> accountCreatedTopic)
{
    var accountEvent = await req.Content.ReadAsAsync<AccountEventDTO>();

    if (accountEvent != null && accountEvent.Name != null)
    {
        // Serialization
        var bytes = Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(accountEvent));
        var memoryStream = new MemoryStream(bytes, writable: false);
        var message = new BrokeredMessage(memoryStream) { SessionId = Guid.NewGuid().ToString() };

        await accountCreatedTopic.AddAsync(message);
        return req.CreateResponse(HttpStatusCode.OK, "Account successfully added to topic.");
    }

    return req.CreateResponse(HttpStatusCode.BadRequest, "Account was not formed well.");
}

Azure 函数从队列中拉取对象：

[FunctionName("AccountCreatedSubscriber")]
public static void Run([ServiceBusTrigger("topic-name", "license-keys", Connection = "BusConnectionString")]BrokeredMessage accountEvent, ILogger log)
{
    // ERROR on this line during deserialization
    var account = accountEvent.GetBody<AccountEventDTO>();

    var accountAddedEvent = Mapper.Map<AccountEventDTO, AccountAddedEvent>(account);
    _accountHandler.Handle(accountAddedEvent);
    GenericLogger.AccountLogging(log, accountAddedEvent);
}

错误信息：

AccountEventDTO:

public class AccountEventDTO : IAccountEvent
{
    public string Name { get; set; }
    public string SugarId { get; set; }
    public string AccountSubTypeRaw { get; set; }
    public AccountType AccountType { get; set; } = AccountType.Customer;
    public AccountSubType? AccountSubType { get; set; } = null;
    public string Phone { get; set; }
    public string PhoneAlternate { get; set; }
    public string BillingAddressCity { get; set; }
    public string BillingAddressCountry { get; set; }
    public string BillingAddressPostalCode { get; set; }
    public string BillingAddressState { get; set; }
    public string BillingAddressStreet { get; set; }
    public string ShippingAddressCity { get; set; }
    public string ShippingAddressCountry { get; set; }
    public string ShippingAddressPostalCode { get; set; }
    public string ShippingAddressState { get; set; }
    public string ShippingAddressStreet { get; set; }
    public string Website { get; set; }
}

Answer 1

您正在使用 BrokeredMessage（适用于 .NET 的旧 Azure 服务总线客户端，WindowsAzure.ServiceBus）。当消息作为内存流发送时，必须使用相同的方法接收和反序列化。 GetBody<T> 如果您构造 BrokeredMessage 并传入类型为 T 的对象，GetBody<T> 将起作用。

注：下一代客户端（Microsoft.Azure.ServiceBus) only works raw with byte array (memory stream for the old client). If this is a new project, recommend to stick with that approach rather than serialized types. More info is available in a GitHub issue here.

Answer 2

通过改变我在发送端序列化消息的方式以及我在接收端将其下拉的方式最终解决了这个问题。

发送序列化：

var jsonString = JsonConvert.SerializeObject(accountEvent);
var message = new BrokeredMessage(jsonString);
message.SessionId = Guid.NewGuid().ToString();
message.ContentType = "application/json";

正在接收反序列化：

var content = accountEvent.GetBody<string>();
var account = JsonConvert.DeserializeObject<AccountEventDTO>(content);

使用 BrokeredMessage 从 Azure 服务总线队列 (v1) 反序列化强类型对象

Deserialize strongly typed object from Azure Service Bus Queue (v1) using BrokeredMessage

c#

azure

azureservicebus

azure-servicebus-topics

azure-functions