使用Azure WebJob从EventHub读取

Question

我正在尝试使用来自WebJob的EventHub消息，但没有用。作业构建和运行时不会抛出任何异常，但永远不会调用触发器。我正在引用Microsoft.Azure.WebJobs，Microsoft.Azure.WebJobs.Extensions和Microsoft.Azure.WebJobs.ServiceBus v2.0.0.0-beta2。

这是我的代码：

的Program.cs：

public static void Main()
{
  var eventHubConfig = new EventHubConfiguration();
  string eventHubName = "myHub";

  eventHubConfig.AddReceiver(eventHubName, "Endpoint=sb://xxxx.servicebus.windows.net/;SharedAccessKeyName=xxxx;SharedAccessKey=yyyy");
  config.UseEventHub(eventHubConfig);

  JobHost host = new JobHost(config);

  if (config.IsDevelopment)
  {
    config.UseDevelopmentSettings();
  }

  host.RunAndBlock();
}

Functions.cs：

public static void Trigger([EventHubTrigger("myHub")] string message)
{
  _logger.Debug("Message received");
}

在我的app.config中，我为AzureWebJobsDashboard，AzureWebJobsServiceBus和AzureWebJobsStorage设置了相应的连接字符串。

我尝试过使用批量消息到更改触发器方法的方法签名，特别是参数类型为EventData或byte []。什么都行不通。我应该注意消息作为包装在EventData中的字节数组发送到EventHub。

我错过了什么？

感谢您的时间并期待回复。

Answer 1

根据您的说明，我按照Azure WebJobs SDK EventHub support和Get started with Event Hubs来测试这个问题。我可以收到消息，你可以参考我的代码片段：

<强> Program.cs的

class Program
{
    static string eventHubName = "{your-EventHub-name}";
    static string connectionString = "{RootManageSharedAccessKey-connection-string}";
    static void Main(string[] args)
    {
        JobHostConfiguration config = new JobHostConfiguration();
        config.Tracing.ConsoleLevel = System.Diagnostics.TraceLevel.Error;

        var eventHubConfig = new EventHubConfiguration();
        eventHubConfig.AddReceiver(eventHubName, connectionString);
        config.UseEventHub(eventHubConfig);

        JobHost host = new JobHost(config);
        if (config.IsDevelopment)
        {
            config.UseDevelopmentSettings();
        }

        //Send test messages
        Task.Run(() => {
            SendingRandomMessages();
        });

        host.RunAndBlock();
    }

    static void SendingRandomMessages()
    {
        var eventHubClient = EventHubClient.CreateFromConnectionString(connectionString,eventHubName);
        while (true)
        {
            try
            {
                var message = Guid.NewGuid().ToString();
                Console.WriteLine("{0} > Sending message: {1}", DateTime.Now, message);
                eventHubClient.Send(new EventData(Encoding.UTF8.GetBytes(message)));
            }
            catch (Exception exception)
            {
                Console.ForegroundColor = ConsoleColor.Red;
                Console.WriteLine("{0} > Exception: {1}", DateTime.Now, exception.Message);
                Console.ResetColor();
            }

            Thread.Sleep(4000);
        }
    }
}

<强> Functions.cs

public static void Trigger([EventHubTrigger("{your-EventHub-name}")] EventData message)
{
    string data = Encoding.UTF8.GetString(message.GetBytes());
    Console.ForegroundColor = ConsoleColor.Green;
    Console.WriteLine($"Message received. Data: '{data}'");
    Console.ResetColor();
}

<强> Packages.config

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="Microsoft.Azure.KeyVault.Core" version="1.0.0" targetFramework="net451" />
  <package id="Microsoft.Azure.ServiceBus.EventProcessorHost" version="2.2.6" targetFramework="net451" />
  <package id="Microsoft.Azure.WebJobs" version="2.0.0-beta2" targetFramework="net451" />
  <package id="Microsoft.Azure.WebJobs.Core" version="2.0.0-beta2" targetFramework="net451" />
  <package id="Microsoft.Azure.WebJobs.ServiceBus" version="2.0.0-beta2" targetFramework="net451" />
  <package id="Microsoft.Data.Edm" version="5.6.4" targetFramework="net451" />
  <package id="Microsoft.Data.OData" version="5.6.4" targetFramework="net451" />
  <package id="Microsoft.Data.Services.Client" version="5.6.4" targetFramework="net451" />
  <package id="Microsoft.WindowsAzure.ConfigurationManager" version="1.8.0.0" targetFramework="net451" />
  <package id="Newtonsoft.Json" version="9.0.1" targetFramework="net451" />
  <package id="System.Spatial" version="5.6.4" targetFramework="net451" />
  <package id="WindowsAzure.ServiceBus" version="3.4.1" targetFramework="net451" />
  <package id="WindowsAzure.Storage" version="7.2.1" targetFramework="net451" />
</packages>

<强>结果：

此外，您可以登录Azure Portal，查看Event Hub的概述刀片，如下所示：