Notification Service With Kafka In Contra Costa
Description
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FAQ
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.
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".
In this section, we will learn how a producer sends messages to the Kafka topics. Step1: Start the zookeeper as well as the kafka server. Step2: Type the command: 'kafka-console-producer' on the command line. This will help the user to read the data from the standard inputs and write it to the Kafka topic.
The first step in achieving Exactly-Once processing is to enable idempotence by setting enable. idempotence=true in the producer config. This will enable Idempotence Guarantee Semantics. We can optionally set transactional.id to some unique value that is constant across application restarts.
You can receive messages by configuring a MessageListenerContainer and providing a message listener or by using the @KafkaListener annotation.
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:
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.