This document provides an overview of Microsoft Azure Service Bus and compares it to Azure Queues. Service Bus allows applications and services to communicate over reliable messaging even if they are not connected all the time. It supports queuing and publish/subscribe capabilities. Service Bus Queues offer more features than Azure Queues, including larger message sizes, unlimited time-to-live for messages, and publish/subscribe capabilities using topics and subscriptions. The document also describes how to configure applications to use Service Bus Queues and Relay for communication between apps and services.

1. Service Bus
Pavlo Revenkov
EPAM Cloud Computing Competency Center
Email: pavlo_revenkov@epam.com
Skype: rp_risingstar

2. Windows Azure Queue
2
Worker-role
Web-role
Worker-role
Web-role
Worker-role

3. Windows Azure Services Bus
Worker-role
Web-role
Queue #1
Worker-role
Web-role
Topic
Queue #N
Worker-role
3

4. 4
Windows Azure
Queues
Windows Azure
Service Bus Queues
- No ordering guarantee
- First-In-First-Out
- At-Least-Once delivery
- At-Least-Once, At-Most-Once
- Message size up to 64 KB
- Message size up to 256 KB
- Queue size up to 100 TB
- Queue size up to 5 GB
- One-to-one message delivery
- Publish/Subscriber
- Time-to-live up to 7 days
- Time-to-live unlimited
- In-place update
- No in-place update

5. Management
5
URI: sb://<namespace>.servicebus.windows.net/
Namespace Manager
Management
Queues
Topics
Subscriptions
QueueClient
TopicClient
SubscriptionClient
Send
Receive

6. Workflow
6
var namespaceManager =
NamespaceManager.CreateFromConnectionString(
CloudConfigurationManager.GetSetting(connectionString));
if (!namespaceManager.SubscriptionExists(path))
namespaceManager.CreateSubscription(new SubscriptionDescription(path));
var subscriptionClient = Microsoft.ServiceBus.Messaging.SubscriptionClient
.CreateFromConnectionString(...);
var message = subscriptionClient.Receive();
try
{
...
message.Complete();
}
catch (Exception)
{
message.Abandon();
}

7. Service Bus Relay
7
Worker-role
Web-role
WCF-service
Client

8. Configuration
Everything you need is to change “*.config” file!
<extensions>
<bindingExtensions>
<add name=“netTcpRelayBinding”
type=“Microsoft...NetTcpRelayBindingCollectionElement” />
...
<behaviorExtensions>
<add name=“transportClientEndpointBehavior”
type=“Microsoft...TransportClientEndpointBehaviorElement” />
...
<behavior name=“sbTokenProvider”>
<transportClientEndpointBehavior>
<tokenProvider>
<sharedSecret issuerName=“[NAME]” issuerSecret=“[KEY]” />
...
<endpoint contract=“<contractname>”
binding=“netTcpRelayBinding”
address=“sb://<namespace>.servicebus.windows.net/<servicename>”
behaviorConfiguration=“sbTokenProvider” />
8

9. Demo
9

10. References
10
How to use the Service Bus


windowsazure.com/en-us/develop/net/how-to-guides/service-bus-queues/
windowsazure.com/en-us/develop/net/how-to-guides/service-bus-topics/
Hybrid application using Service Bus Relay

windowsazure.com/en-us/develop/net/tutorials/hybrid-solution/
Windows Azure Queues vs. Windows Azure Service Bus

msdn.microsoft.com/en-us/library/windowsazure/hh767287.aspx

11. Questions?
11