9/14/2023 0 Comments Spring kafka source code![]() ![]() Where the arguments are for the topic name, the number of partitions, and the number of replications, respectively. How to configure a topic to have multiple partitions and replications? Having multiple partitions allow multiple consumers to process messages in parallel.įor high availability, if we have multiple instances of the broker, then we can set the topic’s replication relative to the number of broker instances - which leads to partitions replications to the broker’s follower instances.Ĥ. Use cases: scalability (parallelism) and high availability (redundancy)Īs mentioned earlier, the broker stores events/messages through logs - these logs are within a specific partition. Short answer: A partition holds the logs. Here’s a quick way to check using the terminal: bin/kafka-run-class.sh - broker-list localhost:9092 - topic test-topic Using our simple implementation, we can try checking the offset every time a message is processed. How does a Consumer know what message to process next? To find where those logs reside, we can check the config/server.properties and then look for the “ log.dir” property.Ģ. Then, it makes a log file inside that directory. The Kafka broker creates a directory using the topic name (and partition number as a naming convention). ![]() Java package .config import import import .consumer. Below is the code for the KafkaConfig.java file. Step 2: Create a Configuration file named KafkaConfig. How does Kafka Broker store the messages? Add the Spring for Apache Kafka dependency to your Spring Boot project. ![]()
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