Notification Service With Kafka In Fulton
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How to Produce a Message into a Kafka Topic using the CLI? Find your Kafka hostname and port e.g., localhost:9092. If Kafka v2. 5+, use the --bootstrap-server option. If older version of Kafka, use the --broker-list option. Provide the mandatory parameters: topic name. Use the kafka-console-producer.sh CLI as outlined below.
Kafka stands out for its ability to handle high throughput and provide scalability, fault tolerance, and message retention. These features make Kafka ideal for a notification system where reliability and real-time processing are crucial.
Kafka can not push notifications to consumers. Consumers have to keep polling/consuming messages in order to receive them. This is the only way messages stored in Kafka can flow to consumers. The Consumer Design section in the Apache Kafka documentation explains why "consumer pulling" was choosed over "broker pushing".
The notification email service consumes email requests from the Kafka notification topic and processes them to send them to a third-party service. Modules like PT, TL, PGR etc make use of this service to send messages through the Kafka Queue.
While Kafka has supported exactly-once semantics for years in its clients and stream processing libraries, Kafka Connect lacked this support for source connectors until version 3.3. In this talk, learn how KIP-618 made exactly-once source connectors possible.
Kafka supports exactly-once delivery in Kafka Streams and uses transactional producers and consumers to provide exactly-once delivery when transferring and processing data between Kafka topics.
One very important and often missed detail is that Kafka supports exactly-once delivery only in Kafka Streams. To turn it on just change a config option processing. guarantee from at_least_once(default option) to exactly_once_v2.
Complete the following steps to receive messages that are published on a Kafka topic: Create a message flow containing a KafkaConsumer node and an output node. Configure the KafkaConsumer node by setting the following properties: On the Basic tab, set the following properties: