Anypoint MQ – Pub Sub Model

- Karthik Selvaraj

AgendaWhat’s Pub Sub ModelBusiness Use case of Pub Sub

ModelPub Sub with Anypoint MQPub Sub Operations

Pub Sub ModelPublish–Subscribe is a messaging pattern where senders

of messages(Publishers) do not program the messages to be sent directly to specific receivers (subscribers), but instead publish the messages with a topic without knowledge of their subscribers. Similarly, subscribers express interest to one or more topics and only receive messages that are of interest, without knowledge of who the publishers of the messages are.

Pub Sub – Use caseLet’s consider a mobile app named SportsNewsZX, which

provides customised sports news for customers based on their interest.

Currently their operations provide update for Cricket, Basket ball, Golf and Rugby.

Their customers are Kumar,John,Mary and Asif. Each person has their own interest.Kumar needs only cricket updates.John loves Rubgy and golf.Mary wants only Basket Ball updates.Asif is interested in all sports.

Pub Sub – Use case

SportsNewsZX

PUBLISH

Subscriber List

GolfJohnAsif

RugbyJohnAsif

CricketKumar

Asif

Basket BallAsif

Mary

Customers

Kumar

Asif

John

Mary

Pub Sub – Use caseSo SportsNewsZX don’t directly send the messages to the

customers, instead they publish a message with a topic tagged among the four sports topic (Cricket, basket ball, golf and Rubgy).

A subscriber list is maintained and if the customers need updates on any topic, they can subscribe to it to get updates.

A subscriber can unsubscribe from a topic as well.In this scenario this approach Pub Sub model is best suited

and it provides assured delivery of message for the customers who have subscribed.

Pub Sub with Anypoint MQTo achieve this model with Anypoint

MQ, we use the exchange component. A queue is created for each customer.An exchange is created for each sports

topic.

Creating a Queue – Anypoint MQ

Creating a Queue – Anypoint MQ

Creating a Queue – Anypoint MQ

Creating a Queue – Anypoint MQRepeat the same process and create the

queue for all customers.Once created , we need to create

exchange for each sports topic as well.

Creating an Exchange– Anypoint MQ

Creating an Exchange – Anypoint MQ

Creating an Exchange – Anypoint MQ

Creating an Exchange – Anypoint MQCreate the Exchange and select the

queue/customers who are interested in those specific sports topics.

Repeat the same and create exchange for all other sport topics as well.

Creating an Exchange – Anypoint MQ

Sending a Message – Anypoint MQTo send a message for a sport topic, click

the exchange for the particular news to be published.

In this example we can publish a cricket message.

Sending a Message – Anypoint MQ

Sending a Message – Anypoint MQ

Sending a Message – Anypoint MQ

Sending a Message – Anypoint MQ

Sending a Message – Anypoint MQ

Sending a Message – Anypoint MQ

Reading a Message – Anypoint MQTo read a message from a queue, click

the queue and select message browser option to see the messages.

Then, select get messages option.Click the ID column to view the message

content.

Reading a Message – Anypoint MQ

Reading a Message – Anypoint MQ

Reading a Message – Anypoint MQ

Referencehttps://docs.mulesoft.com/anypoint-mq/mq-understandinghttps://docs.mulesoft.com/anypoint-mq/mq-tutorialhttps://en.wikipedia.org/wiki/Message_queuing_servicehttps://docs.mulesoft.com/anypoint-mq/mq-ack-modehttps://anypoint.mulesoft.com/https://docs.mulesoft.com/release-notes/mq-release-noteshttps://docs.mulesoft.com/release-notes/mq-connector-rele

ase-notes

Referencehttps://docs.mulesoft.com/anypoint-mq/mq-ack-modehttps://docs.mulesoft.com/anypoint-mq/mq-faqhttps://docs.mulesoft.com/anypoint-mq/mq-apishttps://docs.mulesoft.com/release-notes/anypoint-studiohttps://

en.wikipedia.org/wiki/Publish%E2%80%93subscribe_pattern

Pub Sub - Anypoint MQ

Thank You