Java Producer Callbacks and Sticky Partitioner

Pragya Keshap answered on February 11, 2023 Popularity 1/10 Helpfulness 1/10

answer Java Producer Callbacks and Sticky Partitioner

Java Producer Callbacks and Sticky Partitioner

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For this, we need to implement a callback function. This function is implemented for asynchronously handling the request completion. That's why its return type will be void. This function will be implemented in the block where the producer sends data to Kafka.

The callback function invoked by the producer is onCompletion(). Basically, this method requires two arguments:

Metadata of the Record: Metadata of the record e.g. information regarding the partition and its offsets.

Exception: Any exception thrown during the produce request

Let's see the implementation of the Producer callback in the below code extrac

            // send data - asynchronous
            producer.send(producerRecord, new Callback() {
                public void onCompletion(RecordMetadata recordMetadata, Exception e) {
                    // executes every time a record is successfully sent or an exception is thrown
                    if (e == null) {
                        // the record was successfully sent
                        log.info("Received new metadata. \n" +
                                "Topic:" + recordMetadata.topic() + "\n" +
                                "Partition: " + recordMetadata.partition() + "\n" +
                                "Offset: " + recordMetadata.offset() + "\n" +
                                "Timestamp: " + recordMetadata.timestamp());
                    } else {
                        log.error("Error while producing", e);
                    }
                }
            });

https://www.conduktor.io/kafka/complete-kafka-producer-with-java/

Popularity 1/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: java partitioner producer sticky

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Contributed on Feb 11 2023

Pragya Keshap

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Java Producer Callbacks and Sticky Partitioner

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