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Asynchronous messaging benefits, patterns, technologies
The document discusses asynchronous messaging, highlighting its benefits, patterns, and technologies such as message queues and event-driven architecture. It covers various messaging frameworks like MassTransit and RabbitMQ, emphasizing message routing and persistence. Additionally, the document briefly outlines the services provided by Deloitte to clients across multiple industries and the importance of professional advice in decision-making.
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Asynchronous messaging benefits, patterns, technologies
- 1. Asynchronous messaging Asynchronous messagingBenefits, Patterns, Technologies
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- 10. When Servers Crash DB App [HTTP]$$ Order Tx Call 1 of 3 Call 2 of 3 RollbackServer update
- 11. TxApp DB Call 1 of3 Deadlock Exception Write to log A B Call 2 of 3 Where’s the order!? When Deadlocks Happen
- 12. Securing client requestswith Messaging TxQ$$ Order App Receive DBCall 1 of 3 Rollback Call 2 of 3 Rollback The order is back in the queue
- 13. © 2016 DeloitteThe Netherlands 12Insert your footer here
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- 17. Publish event Provider Consumer Queue 1 Consumer Consumer MessageBus Consumer Queue 2 Consumer Consumer Consumer Queue N Consumer Consumer Pub/sub
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- 23. Travel Agent Booking Invoicing Tour guide Makereservation, pay Mike registered for tour X, on date Y (event) Date Traveller 1-1-2017 Mike Projection Read model
- 24. Messaging patterns At leastonce delivery Fore and Forget Saga BASE
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- 27. Inside services: Pipesand filters
- 28. © 2016 DeloitteThe Netherlands 27 MSMQ Messaging middleware
- 29. © 2016 DeloitteThe Netherlands 28Insert your footer here
- 30. © 2016 DeloitteThe Netherlands MassTransit NServiceBus RabbitMQ RabbitMQ Azure Service Bus Azure Service Bus MSMQ MSMQ ActiveMQ 29Insert your footer here
- 31. Feb 2016: Introduction ofasynchronous messaging DDTP
- 32. Message persistence Message routing Pub/sub Loadbalancing Operations Queues Topics Exchanges Messages
- 34. Create exchanges Create queues Messagerouting C# C# Handling Pipeline Saga state persistence Test support Conn. management Message Types Consumers Observers Sagas Endpoints
- 35. Resources: MassTransit / RabbitMQ examples eventstore-masstransit-poc http://nldlc0068.dlc.local/projects/TOOLS/repos/ eventstore-masstransit-poc MassTransitPublish/Subscribe example http://looselycoupledlabs.com/2014/06/masstran sit-publish-subscribe-example Event Driven Architecture Training All video’s of Udi Dahans’ workshop on request
- 36. Deloitte refers toone or more of Deloitte Touche Tohmatsu Limited, a UK private company limited by guarantee (“DTTL”), its network of member firms, and their related entities. DTTL and each of its member firms are legally separate and independent entities. DTTL (also referred to as “Deloitte Global”) does not provide services to clients. Please see www.deloitte.nl/about for a more detailed description of DTTL and its member firms. Deloitte provides audit, consulting, financial advisory, risk management, tax and related services to public and private clients spanning multiple industries. Deloitte serves four out of five Fortune Global 500® companies through a globally connected network of member firms in more than 150 countries bringing world-class capabilities, insights, and high-quality service to address clients’ most complex business challenges. To learn more about how Deloitte’s approximately 225,000 professionals make an impact that matters, please connect with us on Facebook, LinkedIn, or Twitter. This communication contains general information only, and none of Deloitte Touche Tohmatsu Limited, its member firms, or their related entities (collectively, the “Deloitte Network”) is, by means of this communication, rendering professional advice or services. Before making any decision or taking any action that may affect your finances or your business, you should consult a qualified professional adviser. No entity in the Deloitte Network shall be responsible for any loss whatsoever sustained by any person who relies on this communication. © 2016 Deloitte The Netherlands
Editor's Notes
- #4 It's been known for thousands of years in yoga as "samavritti pranayama", or "square breath". Has its origin in Hinduism. The advice is to count on the finger of one hand. Inhale while stepping 1 2 3 4, Hold 1 2 3 4, Exhale 1 2 3 4 and Hold 1 2 3 4. All of this without mentally counting, just use your fingers to do the steps. It is recommended before meditation for calming the agitated mind.
- #5 SOA: No more integration over database But often applied as technical separation: separation between UI, Orchestration, Business logic, Data access
- #6 Microservices: Emphasis on separating applications based on functional requirements
- #8 point to point synchronous communication: Coupling in time, single listener. Message is lost if nobody is listening at the other end.
- #9 Slow form of async communication,. Fire and forget.
- #10 Async communication, can feel like instant communication with modern technologies
- #14 Zie 06 - Messaging Patterns - Part 1 - particular-1.flv. Meer requests > meer server threads. Thread gebruikt geheugen (stack, niet heap). Iedere thread gebruikt 1MB stack geheugen + heap geheugen dat de thread gebruikt. Bij meer gelijktijdige threads meer geheugengebruik, zolang er voldoende geheugen op de server is is dat geen probleem. Bij onvoeldoende server resources/threads: melding connection refused.
- #15 High load
- #16 queues
- #18 Smart endpoints, dumb pipes
- #19 How to implement this? When the page opens, query the ERP for stock details, query the CRM for sales activity, query the webshop for sales data? A chain is only as strong as its weakest link
- #20 Book a ticket at a travel agency
- #21 Bus driver needs to check whether you booked and payed
- #22 Query provider
- #23 YES, event driven == redundant data but this is fine as long as there is only one owner
- #26 Logging Authentication Authorisation Exception handling Pipe and filters
- #29 Amazon Simple Queue Service (SQS) ZeroMQ: Peter Hintjens, performance, no mature solution for persistence of messages Kafka: log/journal/queue Azure service bus max message size: 256KB Not available on premise MSMQ max message size: 4MB RabbitMQ better communication and less issues than ActiveMQ
- #30 http://lh4.ggpht.com/_159eVJubwBA/TaIfaYZkbLI/AAAAAAAABTQ/_7HNkLE5rhQ/mqshootout%5B5%5D.jpg?imgmax=800
- #32 RabbitMQ: pub/sub, broker, infrastructure, persistence
- #35 Create exchanges and queues based on topics (types) and consumers