我有以下工作流程:
- 服务总线接收消息。
- Azure 函数触发并尝试通过 HTTP 将此消息传递到某些服务。
- 如果交付失败 - 函数抛出异常(自定义)并通过以下代码禁用主题订阅:
- 并行 ping 服务的特殊健康检查端点的另一个功能,如果它得到 200 - 它会尝试启用订阅并使流程再次工作。
- 该步骤可以重复N次,导致健康检查将返回200,因此点2的交付url - 4xx代码。
在下一次尝试启用订阅并传递消息后,我希望传递计数会增加,最终(在 10 次传递尝试之后)它将达到死信。 实际 - 它等于 1。
我假设,当我调用 CreateOrUpdate 并更改状态时,它可能会重置。如果是 - 管理订阅状态而不是 Microsoft.Azure.Management 包的其他方法是什么,以便不会重置消息传递计数?
更新:功能代码
public static class ESBTESTSubscriptionTrigger
{
private static readonly HttpClient Client = new HttpClient();
private static IDatabase redisCache;
[FunctionName("ESBTESTSubscriptionTrigger")]
[Singleton]
public static async Task Run([ServiceBusTrigger("Notifications", "ESBTEST", AccessRights.Listen, Connection = "NotificationsBusConnectionString")]BrokeredMessage serviceBusMessage, TraceWriter log, [Inject]IKeyVaultSecretsManager keyVaultSecretsManager)
{
var logicAppUrl = await keyVaultSecretsManager.GetSecretAsync("NotificationsLogicAppUrl");
if (redisCache == null)
{
redisCache = RedisCacheConnectionManager.GetRedisCacheConnection(
keyVaultSecretsManager.GetSecretAsync("RedisCacheConnectionString").GetAwaiter().GetResult());
}
if (string.IsNullOrWhiteSpace(logicAppUrl))
{
log.Error("Logic App URL should be provided in Application settings of function App.");
throw new ParameterIsMissingException("Logic App URL should be provided in Application settings of function App.");
}
var applicaitonId = serviceBusMessage.Properties["applicationId"].ToString();
var eventName = serviceBusMessage.Properties.ContainsKey("Event-Name") ? serviceBusMessage.Properties["Event-Name"].ToString() : string.Empty;
if (string.IsNullOrWhiteSpace(applicaitonId))
{
log.Error("ApplicationId should be present in service bus message properties.");
throw new ParameterIsMissingException("Application id is missing in service bus message.");
}
Stream stream = serviceBusMessage.GetBody<Stream>();
StreamReader reader = new StreamReader(stream);
string s = reader.ReadToEnd();
var content = new StringContent(s, Encoding.UTF8, "application/json");
content.Headers.Add("ApplicationId", applicaitonId);
HttpResponseMessage response;
try
{
response = await Client.PostAsync(logicAppUrl, content);
}
catch (HttpRequestException e)
{
log.Error($"Logic App responded with {e.Message}");
throw new LogicAppBadRequestException($"Logic App responded with {e.Message}", e);
}
if (!response.IsSuccessStatusCode)
{
log.Error($"Logic App responded with {response.StatusCode}");
var serviceBusSubscriptionsSwitcherUrl = await keyVaultSecretsManager.GetSecretAsync("ServiceBusTopicSubscriptionSwitcherUri");
var sbSubscriptionSwitcherResponse = await Client.SendAsync(
new HttpRequestMessage(HttpMethod.Post, serviceBusSubscriptionsSwitcherUrl)
{
Content =
new
StringContent(
$"{{\"Action\":\"Disable\",\"SubscriptionName\":\"{applicaitonId}\"}}",
Encoding.UTF8,
"application/json")
});
if (sbSubscriptionSwitcherResponse.IsSuccessStatusCode == false)
{
throw new FunctionNotAvailableException($"ServiceBusTopicSubscriptionSwitcher responded with {sbSubscriptionSwitcherResponse.StatusCode}");
}
throw new LogicAppBadRequestException($"Logic App responded with {response.StatusCode}");
}
if (!string.IsNullOrWhiteSpace(eventName))
{
redisCache.KeyDelete($"{applicaitonId}{eventName}DeliveryErrorEmailSent");
}
}
}