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Program.cs
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Program.cs
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//
// Copyright © Microsoft Corporation, All Rights Reserved
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS
// OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
// ANY IMPLIED WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A
// PARTICULAR PURPOSE, MERCHANTABILITY OR NON-INFRINGEMENT.
//
// See the Apache License, Version 2.0 for the specific language
// governing permissions and limitations under the License.
namespace SendersReceiversWithTopics
{
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Azure.ServiceBus;
using Microsoft.Azure.ServiceBus.Core;
using Newtonsoft.Json;
public class Program : MessagingSamples.Sample
{
public async Task Run(string connectionString)
{
var cts = new CancellationTokenSource();
await this.SendMessagesAsync(connectionString, BasicTopicName);
var allReceives = Task.WhenAll(
this.ReceiveMessagesAsync(connectionString, BasicTopicName, "Subscription1", cts.Token, ConsoleColor.Cyan),
this.ReceiveMessagesAsync(connectionString, BasicTopicName, "Subscription2", cts.Token, ConsoleColor.Green),
this.ReceiveMessagesAsync(connectionString, BasicTopicName, "Subscription3", cts.Token, ConsoleColor.Yellow));
await Task.WhenAll(
Task.WhenAny(
Task.Run(() => Console.ReadKey()),
Task.Delay(TimeSpan.FromSeconds(10))
).ContinueWith((t) => cts.Cancel()),
allReceives);
}
async Task SendMessagesAsync(string connectionString, string topicName)
{
var sender = new MessageSender(connectionString, topicName);
dynamic data = new[]
{
new {name = "Einstein", firstName = "Albert"},
new {name = "Heisenberg", firstName = "Werner"},
new {name = "Curie", firstName = "Marie"},
new {name = "Hawking", firstName = "Steven"},
new {name = "Newton", firstName = "Isaac"},
new {name = "Bohr", firstName = "Niels"},
new {name = "Faraday", firstName = "Michael"},
new {name = "Galilei", firstName = "Galileo"},
new {name = "Kepler", firstName = "Johannes"},
new {name = "Kopernikus", firstName = "Nikolaus"}
};
for (int i = 0; i < data.Length; i++)
{
var message = new Message(Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(data[i])))
{
ContentType = "application/json",
Label = "Scientist",
MessageId = i.ToString(),
TimeToLive = TimeSpan.FromMinutes(2)
};
await sender.SendAsync(message);
lock (Console.Out)
{
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine("Message sent: Id = {0}", message.MessageId);
Console.ResetColor();
}
}
}
async Task ReceiveMessagesAsync(string connectionString, string topicName, string subscriptionName, CancellationToken cancellationToken, ConsoleColor color)
{
// var subscriptionPath = SubscriptionClient.FormatSubscriptionPath(topicName, subscriptionName);
//var receiver = new MessageReceiver(connectionString,subscriptionPath, ReceiveMode.PeekLock);
var receiver = new SubscriptionClient(connectionString, topicName, subscriptionName);
var doneReceiving = new TaskCompletionSource<bool>();
// close the receiver and factory when the CancellationToken fires
cancellationToken.Register(
async () =>
{
await receiver.CloseAsync();
doneReceiving.SetResult(true);
});
// register the RegisterMessageHandler callback
receiver.RegisterMessageHandler(
async (message, cancellationToken1) =>
{
if (message.Label != null &&
message.ContentType != null &&
message.Label.Equals("Scientist", StringComparison.InvariantCultureIgnoreCase) &&
message.ContentType.Equals("application/json", StringComparison.InvariantCultureIgnoreCase))
{
var body = message.Body;
dynamic scientist = JsonConvert.DeserializeObject(Encoding.UTF8.GetString(body));
lock (Console.Out)
{
Console.ForegroundColor = color;
Console.WriteLine(
"\t\t\t\tMessage received: \n\t\t\t\t\t\tMessageId = {0}, \n\t\t\t\t\t\tSequenceNumber = {1}, \n\t\t\t\t\t\tEnqueuedTimeUtc = {2}," +
"\n\t\t\t\t\t\tExpiresAtUtc = {5}, \n\t\t\t\t\t\tContentType = \"{3}\", \n\t\t\t\t\t\tSize = {4}, \n\t\t\t\t\t\tContent: [ firstName = {6}, name = {7} ]",
message.MessageId,
message.SystemProperties.SequenceNumber,
message.SystemProperties.EnqueuedTimeUtc,
message.ContentType,
message.Size,
message.ExpiresAtUtc,
scientist.firstName,
scientist.name);
Console.ResetColor();
}
await receiver.CompleteAsync(message.SystemProperties.LockToken);
}
else
{
await receiver.DeadLetterAsync(message.SystemProperties.LockToken);//, "ProcessingError", "Don't know what to do with this message");
}
},
new MessageHandlerOptions((e) => LogMessageHandlerException(e)) { AutoComplete = false, MaxConcurrentCalls = 1 });
await doneReceiving.Task;
}
private Task LogMessageHandlerException(ExceptionReceivedEventArgs e)
{
Console.WriteLine("Exception: \"{0}\" {0}", e.Exception.Message, e.ExceptionReceivedContext.EntityPath);
return Task.CompletedTask;
}
public static int Main(string[] args)
{
try
{
var app = new Program();
app.RunSample(args, app.Run);
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
return 1;
}
return 0;
}
}
}