Publisher Subscriber Pattern | Pub Sub | System Design

The Publish/Subscribe pattern, also known as pub/sub, is an architectural design pattern that provides a framework for exchanging messages between publishers and subscribers. This pattern involves the publisher and the subscriber relying on a message broker that relays messages from the publisher to the subscribers. The host (publisher) publishes messages (events) to a channel that subscribers can then sign up to.
Although Pub/Sub is based on earlier design patterns like message queuing and event brokers, it is more flexible and scalable. The key to this is the fact Pub/Sub enables the movement of messages between different components of the system without the components being aware of each other’s identity.
In this short video I explain the fundamental concepts behind the Pub/Sub pattern you need to know for any system design interview.
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[@siyaram2855]

Hope this channel becomes repository of all systems design and Distributed systems concepts. Kudos to all you effort. You are improving the game eveytime. One stop shop for SD topics in plain language. Proud of you. 🙏

[@ByteMonk]

Thank you for your continuous support and feedback.

[@siyaram2855]

@@ByteMonk We love your content too.

[@kevinsalmeron5048]

Your videos are great!!! Keep them coming!

[@seijumimurasakibara5516]

this is very informative. It quelled a lot of the questions floating in my mind. Thank you very much for this video!!

[@dunezoop]

Excellent video and very well explained. Please keep this quality content coming! :)

[@ByteMonk]

Thank you! Please help spread the word

[@siyaram2855]

Yes, I love your channel name

[@jonathancohen5664]

Very good video!

[@rajkumarsaroj8337]

Superb

[@shubhankar915]

Question : how does the topic sent the mesage to client? Does it call a callback function of the client with the message?

[@ByteMonk]

When a message is published to a topic, the pub-sub system broadcasts the message to all clients that have subscribed to that topic. The clients receive the message through a callback function that they have registered with the pub-sub system. The callback function is executed by the pub-sub system when a message is received on a subscribed topic. The function can then process the message as required by the client application. This allows for asynchronous message processing and enables the client to take action in response to a message as soon as it is received.

[@poragbhai7995]

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