spring-kafka

问题 I asked a question a few days ago regarding stubbing the future response from the kafka.send() method. this was answered and explained correctly by @kriegaex here Though I faced another issue, on how can i test the onSuccess and onFailure callbacks of this future response. here's the code under testing. import org.springframework.kafka.core.KafkaTemplate; import org.springframework.kafka.support.SendResult; import org.springframework.util.concurrent.ListenableFuture; import org

问题 I am looking for a way to stop consume messages with stream listener. @StreamListener(MBinding.M_INPUT) public void consumeMessage(Message<MerchantEvent> message) { //handle when receive message } cloud: stream: bindings: MInput: destination: topicName group: groupName I have googled it but right now still have no idea how to stop consuming. Is there anyone who know it? 回答1: You can do it using the actuator (see Binding Visualization and Control). Or you can invoke the endpoint

问题 I am trying to write the unit test case for ListenableFuture adding Callback but I am not sure how to do it. Didn`t get anything useful on internet. @Test public void can_publish_data_to_kafka() { String topic = someString(10); String key = someAlphanumericString(5); String data = someString(50); SendResult sendResult = mock(SendResult.class); ListenableFuture<SendResult<String, Object>> future = mock(ListenableFuture.class); given(kafkaTemplate.send(topic, key, data)).willReturn(future);

问题 I am trying to write the unit test case for ListenableFuture adding Callback but I am not sure how to do it. Didn`t get anything useful on internet. @Test public void can_publish_data_to_kafka() { String topic = someString(10); String key = someAlphanumericString(5); String data = someString(50); SendResult sendResult = mock(SendResult.class); ListenableFuture<SendResult<String, Object>> future = mock(ListenableFuture.class); given(kafkaTemplate.send(topic, key, data)).willReturn(future);

问题 I'm trying to unit test the callbacks from the kafkaTemplate.send() but its not working as expected. here's the code snippet of the code im trying to test. @Override public void sendMessage(String topicName, String message) { ListenableFuture<SendResult<String, String>> future = kafkaTemplate.send(topicName, message); future.addCallback(new ListenableFutureCallback<SendResult<String, String>>() { @Override public void onSuccess(SendResult<String, String> result) { System.out.print("Success")

问题 I'm trying to unit test the callbacks from the kafkaTemplate.send() but its not working as expected. here's the code snippet of the code im trying to test. @Override public void sendMessage(String topicName, String message) { ListenableFuture<SendResult<String, String>> future = kafkaTemplate.send(topicName, message); future.addCallback(new ListenableFutureCallback<SendResult<String, String>>() { @Override public void onSuccess(SendResult<String, String> result) { System.out.print("Success")

问题 We have scenario where our application(spring boot, spring-cloud-stream based) listens to multiple Kafka topics (TOPIC_A with 3 partitions, TOPIC_B with 1 partition,TOPIC_C with 10 partitions) i.e. 3 @StreamListener methods. @StreamListener(TopicASink.INPUT) public void processTopicA(Message<String> msg) { logger.info("** recieved message: {} ", msg.getPayload()); // do some processing } @StreamListener(TopicBSink.INPUT) public void processTopicB(Message<String> msg) { logger.info("**

问题 I am trying to poll data from a specific topic like kafka is receiving 100 records/s but most of the time it does not fetch all records. I am using timeout as 5000ms and I am calling this method every 100ms Note : I am subscribing to the specific topic too @Scheduled(fixedDelayString = "100") public void pollRecords() { ConsumerRecords<String, String> records = leadConsumer.poll("5000"); How can I fetch all the data from kafka ? 回答1: Maximum number of records returned from poll() is specified

问题 I am trying to poll data from a specific topic like kafka is receiving 100 records/s but most of the time it does not fetch all records. I am using timeout as 5000ms and I am calling this method every 100ms Note : I am subscribing to the specific topic too @Scheduled(fixedDelayString = "100") public void pollRecords() { ConsumerRecords<String, String> records = leadConsumer.poll("5000"); How can I fetch all the data from kafka ? 回答1: Maximum number of records returned from poll() is specified

问题 I have a springboot app that listen kafka messages and convert them to object @KafkaListener(topics = "test", groupId = "group_id") public void consume(String message) throws IOException { ObjectMapper objectMapper = new ObjectMapper(); Hostel hostel = objectMapper.readValue(message, Hostel.class); } I woder if it is possible to do ti directly @KafkaListener(topics = "test", groupId = "group_id") public void consume(Hostel hostel) throws IOException { } 回答1: You can do it using spring-kafka .