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Intro to Azure Service Bus An introduction to Azure Service Bus with a short demo combining Service Bus Queues and Azure Logic Apps. George - Chrysovalantis Grammatikos MCSA : Cloud Platform, MS Dynamics 365 | Microsoft Azure MVP E-mail : george@cloudopszone. com Blog: https: //cloudopszone. com Microsoft Community Wiki Profile: George Chrysovaladis Grammatikos Tech Community Profile: George Chrysovalantis Grammatikos

Azure Messaging Services Service Bus P 2 P messaging Pub-Sub messaging Cost efficient Durable brokered messaging ü Ent. messaging functionality ü Sessions ü Duplicate Detection ü Message Expiration ü Scheduled Expiration ü ü Event Grid ü HTTP-based event delivery ü Supported by many azure services ü Near real-time notifications ü First 100. 000 operations are free Event Hub Storage Queue Azure Relay ü Simple (Few clicks to build real data pipelines) ü Secure (Certified by CSA STAR, ISO, PCI, HIPAA, HITRUST, Gx. P) ü Massively scalable ü Open (Support popular protocols, AMQP, HTTPS, Apache Kafka. ) ü Basic P 2 P Communication ü Cost Effective (pay only for what we use) ü Compliance certifications (ISO, ITAR, CSA, CDSA) ü Securely Expose onpremises services Relay ü Shared access signature(SAS) authentication

Messaging in real life Healthcare Financial Telecommunications Logistics Public Sector

Azure Service Bus (Messaging as a Service - Maa. S) is an asynchronous cloud delivery messaging service, and offers a secure data transfer between different applications. Namespace Queues Topics Protocols AMQP SBMP HTTP-HTTPS Service Bus Messaging Protocol Many Front End applications send messages to the queue and one application on the back end serves those requests in order of priority, This is a publish-subscribe model, push the message into a topic and that message sent to all subscribers one to many, e. g Twitter or Facebook feeds. ü Default protocol used by Service Bus SDK ü Supported by many apps ü Open messaging protocol ü Ports 5671 & 5672 ü Default protocol used by Service Bus SDK ü Supported by many apps ü Open messaging protocol ü Ports 930 & 9354 ü Cross platform compatibility with many clients ü Provide communication where firewalls may limit connectivity on other protocols. ü Ports 80 & 443

Enterprise Service Bus “An enterprise service bus (ESB) implements a communication system between mutually interacting software applications in a service-oriented architecture (SOA). It represents a software architecture for distributed computing, and is a special variant of the more general client-server model, wherein any application may behave as server or client. ” Source: wikipedia Enterprise Service Bus (ESB)

Azure Service Bus Queue Message Sender Service Bus Namespace Message Receiver Web App Service or App Mobile App Service App ü P 2 P messaging ü First In, First Out (FIFO) processing Queue

Azure Service Bus Topics & Subscriptions Message Sender Service Bus Namespace Web App Mobile App Service App Topic Message Receiver Subscription 01 Service or App 01 Subscription 02 Service or App 02 Subscription 03 Service or App 03 ü Pub – Sub messaging ü Messages are sent to Topics and received from Subscriptions

Azure Service Bus Pricing Tiers

Azure Service Bus Features Per Tier Feature BASIC TIER STANDARD TIER PREMIUM TIER Queues Available Scheduled messages Available Topics Not available Available Transactions Not available Available De-duplication Not available Available Sessions Not available Available Forward TO / Send Via Not available Available Message size 256 KB 1 MB Brokered connections included 100 10, 001 1, 000 per MU Brokered connections (overage allowed) Not available Billable Up to 1, 000 per MU Resource isolation Not available Available Geo-disaster recovery (Geo-DR) Not available Available (Requires additional Service Bus Premium namespaces in another region)

Azure Service Bus Advanced Features Feature Description Message sessions Sessions are grouped related messages and processed together, also sessions can guarantee FIFO sorting Duplicate detection Duplicate messages can be ignored by a messaging entity Message deferral Messages can be preserved on a messaging entity and retrieved later for processing Dead-lettering Invalid or poison messages can be moved to a dead-letter queue Message expiration Messages can be configured to expire after a specified duration Batching Messages can be sent in a single batch, during a period of time delay on a queue or a topic Scheduled delivery Messages can be start processing at a certain time after a delay. Auto-forwarding Automatically removes a queue or subscription to another queue or topic in the same namespace. Filtering and actions The subscriber can filter which message want to receive from the topic.

Service Bus Tools 1. Azure Portal 2. Visual Studio 3. Visual Studio Code 4. Service Bus Explorer

To keep in the mind… ü Think what do you want to do before decide what is the appropriate Service Bus. Net SDK ü It is a wise option to select AMQP protocol ü Use concurrent operations ü Use multiple queues/Topics

Azure Service Bus. Net SDK The old…. The new…. Windows. Azure. Service. Bus Microsoft. Azure. Service. Bus • AMQP, SBMP, HTTP • . Net Framework 4. 6. 1 • Primary Namespaces: • Microsoft. Service. Bus. Messaging • AMQP, HTTP • . Net Core 2. 0, . Net Framework 4. 6. 1, Mono 5. 4, Xamarin. i. OS 1014, Xamarin. Mac 3. 8, Xamarin. Android 8. 0, Universal Windows Platform 10. 0. 16299 • Primary Namespaces: • Microsoft. Azure. Service. Bus. Management

Concurrent operations Usually operations like send, receive, or delete, takes time. To reduce this latency it is best practice to use Concurrent operations, because with that way we can increase the number of operations. Microsoft. Azure. Service. Bus SDK Windows. Azure. Service. Bus SDK var message. One = new Message(body); var message. Two = new Message(body); var message. One = new Brokered. Message(body); var message. Two = new Brokered. Message(body); var send. First. Message. Task = queue. Client. Send. Async(message. One). Continue. With(_ => { Console. Write. Line("Sent message #1"); }); var send. Second. Message. Task = queue. Client. Send. Async(message. Two). Continue. With(_ => { Console. Write. Line("Sent message #2"); }); await Task. When. All(send. First. Message. Task, send. Second. Message. Task); Console. Write. Line("All messages sent");

Multiple queues/Topics If we cannot predict the application load we can use multiple messaging entities, More than one queues or topics. Hotel Web App Topic {Orders} Restaurant Order Processing 01 Bar Order Processing 02 Spa / Hammam Order Processing 03

Demo

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