What is the difference between publisher and subscriber?

The provider of the information is called a publisher . Publishers supply information about a subject without needing to know anything about the applications that are interested in the information. The consumer of the information is called a subscriber .

Why is pub/sub asynchronous?

Publishers communicate with subscribers asynchronously by broadcasting events, rather than by synchronous remote procedure calls (RPCs). Publishers send events to the Pub/Sub service, without regard to how or when these events will be processed. Pub/Sub then delivers events to all services that need to react to them.

When to Use publish subscribe pattern?

Use this pattern when:

1. An application needs to broadcast information to a significant number of consumers.
2. An application needs to communicate with one or more independently-developed applications or services, which may use different platforms, programming languages, and communication protocols.

What are publishers and subscribers in protocol?

In software architecture, publish–subscribe is a messaging pattern where senders of messages, called publishers, do not program the messages to be sent directly to specific receivers, called subscribers, but instead categorize published messages into classes without knowledge of which subscribers, if any, there may be.

Is Kafka pub/sub or producer consumer?

In a very fast, reliable, persisted, fault-tolerance and zero downtime manner, Kafka offers a Pub-sub and queue-based messaging system. Moreover, producers send the message to a topic and the consumer can select any one of the message systems according to their wish.

Can a subscriber also be a publisher?

This acts both as a Subscriber because it receives messages, and as the Publisher because it processes those messages and sends them for further processing.

Does Google use Kafka?

Google and Confluent are in a partnership to deliver the best event streaming service, based on Apache Kafka, to build event driven applications and big data pipelines on Google Cloud Platform.

Is AWS SQS pub-sub?

On AWS, Amazon Simple Queue Service (SQS) provides a fully managed message queuing service with no administrative overhead. With pub/sub messaging, a message published to a topic is delivered to all subscribers to the topic.

Can a publisher also be a subscriber?

1 Answer. If we want to transform incoming message and pass it further to the next Subscriber, we need to implement the Processor interface. This acts both as a Subscriber because it receives messages, and as the Publisher because it processes those messages and sends them for further processing.