spring-kafka

来源： https://stackoverflow.com/questions/59731673/can-multiple-kafkalistener-classes-listen-to-the-same-topic

来源： https://stackoverflow.com/questions/52220225/spring-kafka-and-transactions

问题 I have designed a Spring boot REST API ADD and GET method @RestController("ProductV1Controller") public class ProductController { private final IProductProducer _productProducer; public ProductController(IProductProducer productProducer) { _productProducer = productProducer;} @PostMapping() void AddProduct(@Valid @RequestBody ProductViewModel product) { _productProducer.AddProduct(product); } @GetMapping() List<ProductViewModel> Products() { var test = _productProducer.GetProducts(); return

问题 I am doing deserialization at the Listener in Spring Kafka. But this assumes that the type information was included or sent by a Spring Kafka producer. In my case the Json is being sent across by the Debezium MySQLConnector and it does not add this meta data. So I would like to add it to the requests. I understand its placed in the request somewhere in the JsonSerializer, and I looked at the source code but could not figure out exactly how to use this to add meta data type during

问题 I'm willing to use Spring Batch for Kafka data consumption. This spring-tips link has a basic example for the same. Here's my reader : @Bean KafkaItemReader<String, String> kafkaItemReader() { var props = new Properties(); props.putAll(this.properties.buildConsumerProperties()); return new KafkaItemReaderBuilder<String, String>() .partitions(0) .consumerProperties(props) .name("customers-reader") .saveState(true) .topic("test-consumer") .build(); } My application.properties file: spring:

问题 Here is the error I get: org.apache.kafka.common.errors.SerializationException: Error deserializing key/value for partition distance-0 at offset 0. If needed, please seek past the record to continue consumption. Caused by: java.lang.IllegalStateException: No type information in headers and no default type provided at org.springframework.util.Assert.state(Assert.java:73) at org. springframework.kafka.support.serializer.JsonDeserializer.deserialize(JsonDeserializer.java:370) And applicaiton-dev

问题 Here is the error I get: org.apache.kafka.common.errors.SerializationException: Error deserializing key/value for partition distance-0 at offset 0. If needed, please seek past the record to continue consumption. Caused by: java.lang.IllegalStateException: No type information in headers and no default type provided at org.springframework.util.Assert.state(Assert.java:73) at org. springframework.kafka.support.serializer.JsonDeserializer.deserialize(JsonDeserializer.java:370) And applicaiton-dev

问题 Here is the error I get: org.apache.kafka.common.errors.SerializationException: Error deserializing key/value for partition distance-0 at offset 0. If needed, please seek past the record to continue consumption. Caused by: java.lang.IllegalStateException: No type information in headers and no default type provided at org.springframework.util.Assert.state(Assert.java:73) at org. springframework.kafka.support.serializer.JsonDeserializer.deserialize(JsonDeserializer.java:370) And applicaiton-dev

问题 So I have not been able to configure the JavaType method for JsonSerializer using only yaml. Not sure the reason yet, but in the meantime how do I set this programatically? I have seen code for it in the documentation but where exactly does this code need to run? Spring Kafka: JsonDeserializer doesn't pick up TRUSTED_PACKAGE config This is what I tried so far. Kafka Spring Deserialzer returnType static method never called PS I am on Spring Boot 2.1.8 so cannot easily use the newer way with

问题 So I have not been able to configure the JavaType method for JsonSerializer using only yaml. Not sure the reason yet, but in the meantime how do I set this programatically? I have seen code for it in the documentation but where exactly does this code need to run? Spring Kafka: JsonDeserializer doesn't pick up TRUSTED_PACKAGE config This is what I tried so far. Kafka Spring Deserialzer returnType static method never called PS I am on Spring Boot 2.1.8 so cannot easily use the newer way with