Просто начинаю работать с Azure. Иметь простое приложение C#. NET Core, которое подключается к Azure ServiceBus, читает сообщения и записывает их в базу данных Azure SQL. Работает локально просто отлично - подключается к удаленной Azure Service Bus Queue, читает сообщения, подключается к удаленной Azure SQL db, записывает записи. То же самое точное приложение, развернутое в Azure в качестве WebApp, похоже, «работает», но больше не читает сообщения из Services Bus и больше ничего не записывает в Azure SQL.
Вот все приложение (т.е. Program.cs):
using System;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Azure.ServiceBus;
using System.Data.SqlClient;
namespace ServiceBusReader
{
class Program
{
const string ServiceBusConnectionString = "SB_CONNECTION_STRING";
const string QueueName = "BasicQueue";
static IQueueClient queueClient;
static SqlConnection connection = null;
public static async Task Main(string[] args)
{
System.Diagnostics.Trace.TraceError("Inside Main function...");
queueClient = new QueueClient(ServiceBusConnectionString, QueueName);
Console.WriteLine("======================================================");
System.Diagnostics.Trace.TraceError("======================================================");
Console.WriteLine("Press ENTER key to exit after receiving all the messages.");
Console.WriteLine("======================================================");
SqlConnectionStringBuilder builder = new SqlConnectionStringBuilder();
builder.DataSource = "XXXX.database.windows.net";
builder.UserID = "USERID";
builder.Password = "PASSWORD";
builder.InitialCatalog = "mySampleDatabase";
connection = new SqlConnection(builder.ConnectionString);
connection.Open();
// Register the queue message handler and receive messages in a loop
RegisterOnMessageHandlerAndReceiveMessages();
Console.ReadKey();
await queueClient.CloseAsync();
}
static void RegisterOnMessageHandlerAndReceiveMessages()
{
// Configure the message handler options in terms of exception handling, number of concurrent messages to deliver, etc.
var messageHandlerOptions = new MessageHandlerOptions(ExceptionReceivedHandler)
{
// Maximum number of concurrent calls to the callback ProcessMessagesAsync(), set to 1 for simplicity.
// Set it according to how many messages the application wants to process in parallel.
MaxConcurrentCalls = 1,
// Indicates whether the message pump should automatically complete the messages after returning from user callback.
// False below indicates the complete operation is handled by the user callback as in ProcessMessagesAsync().
AutoComplete = false
};
// Register the function that processes messages.
queueClient.RegisterMessageHandler(ProcessMessagesAsync, messageHandlerOptions);
}
static async Task ProcessMessagesAsync(Message message, CancellationToken token)
{
// Process the message.
Console.WriteLine($"Received message: SequenceNumber:{message.SystemProperties.SequenceNumber} Body:{Encoding.UTF8.GetString(message.Body)}");
string query = "INSERT INTO [SalesLT].[messages] (message) VALUES(@Message)";
SqlCommand cmd = new SqlCommand(query, connection);
System.Diagnostics.Trace.TraceError(Encoding.UTF8.GetString(message.Body));
cmd.Parameters.AddWithValue("@Message", Encoding.UTF8.GetString(message.Body));
cmd.ExecuteNonQuery();
Console.WriteLine("Records Inserted Successfully...");
System.Diagnostics.Trace.TraceError("Records Inserted Successfully...");
// Complete the message so that it is not received again.
// This can be done only if the queue Client is created in ReceiveMode.PeekLock mode (which is the default).
await queueClient.CompleteAsync(message.SystemProperties.LockToken);
// Note: Use the cancellationToken passed as necessary to determine if the queueClient has already been closed.
// If queueClient has already been closed, you can choose to not call CompleteAsync() or AbandonAsync() etc.
// to avoid unnecessary exceptions.
}
// Use this handler to examine the exceptions received on the message pump.
static Task ExceptionReceivedHandler(ExceptionReceivedEventArgs exceptionReceivedEventArgs)
{
Console.WriteLine($"Message handler encountered an exception {exceptionReceivedEventArgs.Exception}.");
var context = exceptionReceivedEventArgs.ExceptionReceivedContext;
Console.WriteLine("Exception context for troubleshooting:");
Console.WriteLine($"- Endpoint: {context.Endpoint}");
Console.WriteLine($"- Entity Path: {context.EntityPath}");
Console.WriteLine($"- Executing Action: {context.Action}");
return Task.CompletedTask;
}
}
}
Должен ли я сделать что-то другое в этом приложении, чтобы оно работало в Azure?