Kafka payload example

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Sep 10, 2020 · The Kafka Connect FilePulse connector is a powerful source connector that makes it easy to parse, transform, and load data from the local file system into Apache Kafka. topic') helloSubscriber(payload: KafkaPayload) {. The AWS Lambda Sink connector is designed to access the general AWS Lambda endpoints. topic") public void receiveDunningHead(final String payload) { LOG. bindings. payload (). You must use the callback argument, not the one passed into registerSeekCallback. ms, you may wish to invoke flush() before waiting or, for convenience, the template has a constructor with an autoFlush parameter that causes the template to flush() on each send. Yes. kafka; Oct 11, 2020 · Step 4 - Extract "payload" only (I'm stuck here): import pyspark. Yes, you can send messages as byte arrays. /bin/kafka-console-producer. The result is omitted and returned as the HTTP response. 7 to consume JSON messages and I want to handle messages that cannot be deserialized correctly. g. log('Print message after receiving', payload); This code example tried to simplify kafka integration with nestjs. We can use it as a messaging system to decouple message producers and consumers, but in comparison to “classical” messaging systems like ActiveMQ, it is designed to handle real-time data streams and provides a distributed, fault-tolerant, and highly scalable architecture for processing and This example shows how to use two Apache Kafka Connector operations, Publish and Consume, to publish a message to Apache Kafka and then retrieve it. Kafka's architecture is built around the concept of producers, consumers, brokers, and topics. Producers are the sources of data. Jan 24, 2019 · 6. Dec 3, 2021 · A simple and efficient way to use Kafka with Snowflake is to write files into cloud storage, for example, an S3 bucket. com Apr 10, 2022 · The short answer is No, you don't have to use it. array (); For example, if <type. You must pass the path to the properties file you want to use. After a message is processed in Kafka, the offset is now beyond that processed message, and If your application needs to maintain message ordering and prevent duplication, you can enable idempotency for your Apache Kafka producer. Kafka Connect is a framework for connecting Kafka with external systems such as databases, key-value stores, search indexes, and file systems, using so-called Connectors. Step 2: Create a Configuration file named KafkaConfig. @KafkaHandler. stream. Sep 12, 2023 · When using normal JSON serialization, without Avro, the entire JSON payload is sent to the Kafka server. Based on that example, I’ll try to explain what a streaming platform is and how it differs from a traditional message broker. On the outbound side, by default, all MessageHeaders are mapped, except id, timestamp, and the headers that map to ConsumerRecord properties. Tip #5: Use the power of record headers. functions as psf emp_df = kafka_df\ . Sorry for the late response, but what do you mean by making the outgoing channel the response of the client? Ideally this would be a constant stream of messages coming in from a topic and going Oct 3, 2023 · Generates a random byte array of a specified size to serve as the payload for each message sent to the Kafka topic. public byte [] getMessageAtIndex (int index) { return messageList. create main table where the data should be located CREATE TABLE mylogger ( id String, area Nullable(String), event_time DateTime64(6), details_json String) ENGINE = MergeTree() PARTITION BY toYYYYMM(event_time) ORDER BY (id, event_time) SETTINGS index May 17, 2018 · In Kafka, Avro is the standard message format. Kafka Connectors are ready-to-use components, which can help us to import data from external systems into Kafka topics and export May 8, 2018 · Trying to mock JSON example in java: GenericRecord genericRecord = AvroUtil. created, updated, or deleted) in the header, you could easily count the number of active contacts simply by subtracting the total number of deleted events from the total number of created events. Nov 19, 2020 · After this basic reading, I tried writing up sample code using the inbuilt library functions, as shown below. It will also use the structured mode when you write that JSON snippet in a Kafka record’s value. Sep 15, 2021 · In this story, I provide an overview of Apache Avro and the Confluent Schema Registry. To override the default behavior, which loops over the same message, I extended the JsonDeserializer to override the deserialize method. select(psf. Use the kafka-server-start tool to start a Kafka server. class)). fixed. The default payload for the Kafka message is a string (with conversion from the underlying bytes using the classes StringDeserializer and StringSerializer from the org. from_json(psf. you can do this. payload (Showing top 20 results out of 342) kafka. To implement a retry logic for message processing in Kafka, we need to select an AckMode. Ensures that the payload size is greater than zero and throws an IllegalArgumentException if not. alias("DF"))\ . In fact, you could have a Kafka cluster running without a Schema Registry. Image recognition and video analytics (also known as computer vision) is probably the number one use case. Oct 30, 2018 · I am using spring-kafka 2. After that, we’ll test our implementation using the Producer API and Testcontainers. 2) and Mule RunTime (4. Message (to get record keys for example), here is the correct signature when doing batch processing: When using a MessageChannelBinder that supports batch listeners, and the feature is enabled for the consumer binding, you can set spring. Oct 24, 2017 · I need to send different JSON payload on the same Kafka Topic (for example, Foo, Bar, Car ) without using parent class. Kafka producers and consumers that use Kafka Avro serialization handle schema management and the serialization of records using Avro and May 11, 2024 · The KafkaConsumer. Is there a way a consumer can simply take a whole message as a byte array? Code: Dec 7, 2021 · In this article, you will learn how to use Kafka Streams with Spring Cloud Stream. The consumer group is a crucial part of Kafka applications. It uses JSON for defining data types/protocols and serializes data in a compact binary format. package com. Jan 8, 2024 · This is known as group rebalancing. On the inbound side, all Kafka Header instances are mapped to MessageHeaders . serialization package). AckMode. In the following tutorial, we will configure, build and run an example in which we will send/receive an Avro message to/from Apache Kafka using Apache Avro, Spring Kafka, Spring Boot and Maven. 5. For a step-by-step guide on building a Python client May 16, 2023 · In this case, you could use a custom Kafka header to indicate the type of event and help you analyze the data downstream. Furthermore, to send JSON data type, we would need to tweak the command. The example contains two flows: The first flow is the Producer flow, which publishes a message to Apache Kafka. Add the “ Spring for Apache Kafka ” dependency to your Spring Boot project. console. Examples for running Debezium (Configuration, Docker Compose files etc. In the following tutorial we demonstrate how to setup a batch listener using Spring Kafka, Spring Boot and Maven. May 9, 2017 · This works only for UTF-8 encoded text files. kafka. @Header : binds a method parameter method to a message header. Since we are consuming JSON, we must explicitly specify the Deserializer class to use for both the key and value via return new DefaultKafkaConsumerFactory<> (props, new StringDeserializer (), new JsonDeserializer<> (User. We have a fictional electric kick-scooter startup whose number one priority is customer satisfaction. To keep things simple, I have made the key and value both to be String. This ensures that each Kafka source has its own consumer group that does not face interference from any other consumer, and therefore can read all of the partitions of its subscribed topics. RELEASE. Create a new Java Project called KafkaExamples, in your favorite IDE. Add Jars to Build Path. Large payloads can be split into multiple smaller chunks that can be accepted by brokers. Suppose if the requirement is to send 15MB of message, then the Producer, the Broker and the Consumer, all three, needs to be in sync. Apache Kafka provides a high-level API for serializing and deserializing record values as well as their keys. To tackle the payload size issue, Apache AVRO uses the binary serialization method. -b kafka-broker:9092 \. selected when sending messages. We’ll be focusing on setting up a KafkaConsumer without relying on Spring Boot modules. Messages may be added before any consumer connects to Jul 20, 2022 · You don't "add it to the class" you would create a validator to validate the instance after it is created by avro. This header is used on the inbound side to provide appropriate conversion of each header value to the original type. message Message payload. json: Apr 27, 2024 · When it comes to serializing Avro data to a Kafka topic, you usually have 2 options : The “modern one” that is about putting the Schema ID + the Avro binary representation of the message payload (see Schema Registry: A quick introduction ). json. Feb 28, 2022 · Step 1: Go to this link and create a Spring Boot project. May 26, 2023 · To create a Kafka message (Record), we create an instance of ProducerRecord<K,V>. Avro depends on Schema which we can define using Json format. 8 or later), Confluent Cloud, and Confluent Platform. Based on spring kafka documentation, I can use @KafkaListener at the class-level and specify @KafkaHandler at the method level ( doc ) @KafkaListener(topics = "myTopic") static class MultiListenerBean {. Currently supported primitive types are null, Boolean, Integer, Long, Float, Double, String, byte[], and complex type of IndexedRecord. *") I'm stuck in this part as I couldn't figure out how to extract payload from JSON string before passing it to from_json() function. See full list on baeldung. It is present with the org. get (index). Dec 20, 2021 · It is not mentioned anywhere unfortunately :-(, but to wrap input events into org. 3. This article covers the basics of Kafka, the Spring Kafka library, and a simple producer and consumer example. Finally, we wrote a simple Spring Boot application to demonstrate the application. ContactInfo, Geography. online tool that will provide example of JSON data for any given Avro schema? Begin a Kafka transaction. Step 3: Create a Consumer file named KafkaConsumer. May 11, 2024 · Kafka is an open-source stream processing platform developed by the Apache Software Foundation. Serializers` will be automatically used where // available. Kafka console producer. Refresh the page, check Medium ’s site status, or find something interesting to read. It is fault-tolerant and durable and handles large amounts of data with ease. select("DF. It uses a compact binary format for serializing data which If you wish to block the sending thread to await the result, you can invoke the future’s get() method; using the method with a timeout is recommended. The ProducerRecord basically identifies the message value and topic to which the message is to be published, along with other metadata. Apache Avro is a data serialization system. sh --topic baeldung --broker-list kafka:9092. OrderCreatedEvent, Customers. I think the argument you are looking for is: --producer. Kafka producer --> Kafka Broker --> Kafka Consumer. kill. Specify the nest option while creating the workspace and name the application api-gateway. Oct 20, 2020 · In the same end-to-end test, we can perform two steps like below for the same record (s): Step 1: Produce to the topic "demo-topic" and validate the received recordMetadata from the broker. Tip #4: Master the command line tools. property>=javaType, it is expected that the JSON schema will have an additional top-level property named javaType that specifies the fully-qualified Java type. The second flow is the Consumer flow, which consumes a message from Apache Kafka. 5, the DefaultAfterRollbackProcessor can be invoked in a new transaction (started after the failed transaction rolls back). What I'm missing here? Maybe I have to configure something on the Kafka side? Like, some topic settings? Or the problem with the consumer configuration? One important (I think) detail. 2) What I need to do is, to listen that topic and get this message with the key, and create a new key by using that Key. ADD_TYPE_INFO_HEADERS ), but when I send and receive both messages I get an exception. Dec 23, 2019 · I am running kafka localy with the following command :. Flexible payloads are both the best and worst thing about event streaming - you never quite know what to expect from each system's payloads. May 1, 2020 · For example: Orders. Kafka; class Program { public static async Task Main(string[] args) { var config = new ProducerConfig { BootstrapServers = "localhost:9092" }; // If serializers are not specified, default serializers from // `Confluent. Delete records. Stay up-to-date with the latest release updates by checking out the changelog available in the same repository. You can also receive null values for other reasons, such as a Deserializer that might return null when it cannot deserialize a value. springframework. Download and set up the Confluent CLI. If you have set a linger. poll(Duration. In some scenarios (for example, Kafka group-based authorization), you may want to use a specific authorized group id to read data. Recently, I have used Confluent 3. Jan 8, 2024 · AckMode. batch-mode to true to enable the entire batch of messages to be passed to the function in a List. Following is a step by step process to write a simple Consumer Example in Apache Kafka. A Deserializer does the opposite, it reads the raw message bytes portion of the Kafka wire protocol and re-creates a message as you want the receiving application to see it. I'm trying to deserialize different JSON payloads from the same Kafka topic. It offers built-in support The Kafka Connect AWS Lambda Sink connector pulls records from one or more Apache Kafka® topics, converts them to JSON, and executes an AWS Lambda function. Kafka Connect is part of Apache Kafka ®, providing streaming integration between data stores and Kafka. The other questions asked here, guided me to a first attempt, but I was not able to get it running. @SubscribeToFixedGroup('hello. getCause() should be the actual exception. 2. In order for this demo to work, we need a Kafka Server running on localhost on port 9092, which is the default configuration of Kafka. col('value'), payload_schema). Refer Install Apache Kafka to know the steps to install Zookeeper and Kafka. So when the size of JSON increases with schema evolution, so does the memory overhead and latency. For KRaft mode, first generate a cluster ID and store it in the properties file. messaging. Producing is fine, working with a <String, ByteArray> producer. AvroTypeException: Expected start-union. Jul 2, 2021 · Here is my code, the question is whether the order of the headers in the list and the order of the messages will match ? @KafkaListener( topics = [&quot;topic&quot;], containerFact using System; using System. Sep 16, 2016 · I'm using Kafka to send produce and consume messages. Remove @Outgoing and use any HTTP client to process the message to send it to some server. 6: Persist the entity into the database in a Hibernate Reactive transaction. You can also use this method to associate this thread’s callback with the assigned partitions (see the example below). Once the workspace is created, install the project dependencies by running the following commands: > cd nestjs-microservices. sh --broker-list localhost:9092 --topic user-timeline < samplerecords. Jul 13, 2022 · As one can see in the beginning of the last code snippet I've tried various consumer settings to no avail. Mar 15, 2019 · The kafkacat header option is only available in recent builds of kafkacat; you may want to build from master branch yourself if your current version doesn't include it. -t my_topic_name -C \. class); @KafkaListener(topics = "test. By default, Kafka uses the StringDeserializer when consuming messages. Note we tested 10 in Feb 5, 2013 · Here is a simple Kafka consumer which takes a keyed message payload. MANUAL: In this manual mode, the consumer doesn’t send an acknowledgment for the messages it processes. An idempotent producer has a unique producer ID and uses sequence IDs for each message, allowing the broker to ensure, on a per-partition basis, that it is committing ordered messages with no duplication. memorynotfound. Deserializer<T> abstractions with some built-in implementations. Connectors Connectors are the link between Kafka and external components, The structure has two main parts schema and payload, schema is the data Jan 9, 2014 · 22. This guide presents the 2 options that we will call RAW or REGISTRY. config CONFIG-FILE. When consuming, I'm using the code below (taken from an example) but I'm getting each record as being just 8 bytes (sample output beneath code). Mar 17, 2024 · Basics of Kafka Connect and Kafka Connectors. Similar code works on spring-kafka version 2. The following is a simple example of a YAML configuration file where the payload of the Kafka message will be the string form of the May 31, 2020 · Apache Avro: Avro is a data serialization system, it provides a compact binary data format to serialize data. The idea is to have equal size of message being sent from Kafka Producer to Kafka Broker and then received by Kafka Consumer i. now run the next queries. Bug Report Kafka Microservice does not validate dto's. May 7, 2020 · Let's start with Anypoint Studio (7. 0 \. apache. sh --broker-list localhost:9092 --topic testTop. 1) First microservice sends message to Kafka with a key which is instance of MyKey object. 4. We will build a simple Spring Boot application that simulates the stock market. sql. We are going to build a software solution where users can rate how satisfied they were with the ride they had. For data engineers, it just requires JSON configuration files to use. Finally, polling the same consumer again for messages now reads all the messages from the beginning of the partition: ConsumerRecords<String, String> records = consumer. common. 11) offers custom headers . Nov 14, 2022 · Create an Nx workspace by running the following command: > npx create-nx-workspace@latest. Documentation says : Schema Registry lives outside of and separately from your Kafka brokers. 1. For an example of how to start Kafka, see the Kafka quickstart. . But the process should remain same for most of the other IDEs. Below is the code for the KafkaConfig. java file. Jan 8, 2024 · $ docker-compose exec kafka kafka-console-producer. For When you use Log Compaction, you can send and receive messages with null payloads to identify the deletion of a key. How they work, Problems they solve, and a sample Java spring boot and node js example. You can use this method, for example, for setting initial offsets for the partitions, by calling the callback. Kafka message processing tracks processed messages by maintaining an offset value that represents the sequential order in which messages are received by Kafka topics. You can also use a DefaultKafkaHeaderMapper (toHeaders()) to populate the map - it will do any JSON decoding (e. For example, when using the mbknor-jackson-jsonSchema utility to generate a JSON Schema from a Java POJO, one can use the annotation @SchemaInject to specify the Mar 27, 2022 · Example of Kafka sending messages for a sink. Before proceeding, let’s first create a sample JSON file sampledata. $": "$". Message. Currently it's one validator per factory; you can use a different factory for each listener or create a validator that delegates to different ones depending on the type. This tutorial has some steps for Kafka topic management and producing and consuming events, for which you can use the Confluent Cloud Console or the Confluent CLI. cloud. This is for a single Kafka Consumer payload. Aug 13, 2018 · Apologies, but something went wrong on our end. kafka payload response is incorrect according to docs. If you want to implement it by yourself (or if you use older version of Kafka), you can add the header to your message payload, lets say as the first 4 bytes of the message, they will represent the area code and can be extracted very fast prior to the parsing process. Let’s begin with our use case. The following image shows an example of the Set Payload configuration in the properties window: Configure the Second Flow Configure the second flow that consumes a message from Apache Kafka. May 23, 2018 · Implementation 1 — Chunking. The response of the AWS Lambda can optionally be written to another Kafka topic. Hence, it improves the performance and scalability of Kafka applications. If you are using ZooKeeper for metadata management, you must start ZooKeeper first. @Bean public Function<List<Person>, Person> findFirstPerson() {. Register Avro Schema to Kafka Schema Registry Mar 24, 2020 · The entire code and examples for this blog post can be found in the flowable-kafka example. You can optionally configure a BatchErrorHandler. Adds 65 to represent an uppercase letter in ASCII code (65 is ‘A’, 66 is ‘B’, and so on). If you pass the Cloud Event example (from above), in an HTTP request, it will use the structured mode. Note that you must provide exactly one of --record-size or --payload-file. In this example, we shall use Eclipse. @FaheemSultan That is correct, although Confluent Platform includes Apache Kafka. I finally remembered to ask the Kafka mailing list and got the following as an answer, which worked perfectly. Topic Design One great feature that Kafka has over many other streaming / messaging platforms is the concept of a Starting with version 2. In payload you can define it like: "entireInput. Jan 10, 2024 · Overview. As Gary mentioned ( here) there is some hint ( JsonSerializer. Feb 17, 2019 · 22. It generally uses JSON to encode that data. Kafka. consumer. Jan 8, 2019 · Don't put code in comments; it's too hard to read; edit the question instead. The chunks can be stored in Kafka in the same way as ordinary (not-chunked) Jun 14, 2023 · @Payload: binds a method parameter to the payload of a message. jsonToGenericRecord(jsonData, avroSchema); It keeps failing: Exception in thread "main" org. Meanwhile, we can specify serializer and deserializer Oct 16, 2020 · Tip #2: Learn about the new sticky partitioner in the producer API. Got VALUE_STRING Is there e. This allows the grouping of similar consumers and makes it possible for them to read in parallel from a partitioned topic. And what I want to do in the listener is to create a new extended key as: @Controller public class KafkaController { private static final Logger LOG = getLogger(KafkaController. <binding-name>. That new topic is then the one that you consume from Kafka Connect (and anywhere else that will benefit from a declared schema). If you include the type of event (e. The offset value indicates the next message to be processed. If you have JSON messages in the file, you can use following way to write in the kafka topic: bin/kafka-console-producer. Serializer<T> and org. The default flow can be renamed to "Kafka Publisher Mar 8, 2018 · Spring Kafka – Batch Listener Example. e. 2. message. May 13, 2017 · The Spring Integration Kafka extension project provides inbound and outbound channel adapters specifically for Apache Kafka. Or make the outgoing channel the response of your client. Aug 7, 2020 · Various use cases for large message payloads exist: Image recognition, video analytics, audio analytics, and file processing are widespread examples. Current behavior @MessagePattern ('hero. Then, if you are using the DeadLetterPublishingRecoverer to publish a failed record, the processor will send the recovered record’s offset in the original topic/partition to the transaction. message (). You'll also notice a reference to User. The long answer is "it depends"; if you want to do some validation on Kafka message, @Payload will help you with this; like the following from spring doc. There are connectors for common (and not-so-common) data stores out there already, including JDBC Aug 9, 2021 · Yes, Schema Registry is not part of Kafka broker. Step 4: Now we have to do the following things in . You can plug KafkaAvroSerializer into KafkaProducer to send messages of Avro type to Kafka. We also demonstrate how to set the upper limit of batch size messages. Data has meaning beyond… Jun 19, 2020 · 1. Jan 22, 2020 · Use ksqlDB, Kafka Streams, or another stream processing to read your source messages from a topic, apply the schema, and write the message to a new topic. Dump log. Create Java Project. Sep 21, 2023 · Kafka routes events in event-driven architectures and creates robust, scalable, and efficient systems for handling real-time data. Lets say that the message is send by the key which is myKey. In this tutorial, we will configure, build and run a Hello World example in which we will send/receive messages to/from Apache Kafka using Spring Integration Kafka, Spring Boot, and Maven. ZipCode. This Python client provides a high-level producer, consumer, and AdminClient that are compatible with Kafka brokers (version 0. We start by configuring the BatchListener. Follow the instructions here to install the Confluent CLI, and then follow these steps connect the CLI to your Confluent Cloud cluster. 2) setup: Open Anypoint studio and create a sample project named as "KafkaDemo". debug("Receiving event with payload [{}]", payload); //I will do database stuff here which i could check in db for testing } } Designing Payloads for Event-Driven Systems. 1. To send a null payload by using the KafkaTemplate, you can pass null into the value argument of Avro serializer¶. after that, I send this message to the consumer in the command line: In clickhouse client (eg dbeaver) connect to localhost:8123. So at your lambda end, you are gonna receive payload as: So your payload is gonna be Map<String,Object> and then you can parse the object into a Map<String,String> and get all the input values to step function in there. ProducerRecord class provides various constructors to add custom headers to a Kafka message. ofSeconds( 10 )); Dec 17, 2020 · feat (microservices): add kafka retriable exception, auto-unwrap payloads nestjs/nest. 5: Send the payload to Kafka inside the Kafka transaction. Threading. if the headers were created by a header mapper on the sending side - for example by a Spring Integration application). You can also run kafkacat from Docker: docker run --rm edenhill/kafkacat:1. Event-driven systems come in different shapes and sizes, and the rules for payload construction are: there are no rules (but there are guidelines). Important. avro. Start zookeeper: This Kafka installation comes with a built-in zookeeper. In this tutorial, we’ll learn how to create a Kafka listener and consume messages from a topic using Kafka’s Consumer API. I had some problem with sending avro messages using Kafka Schema Registry. 12 participants. Jul 22, 2020 · Learn how to use Spring Kafka to send and receive messages from Kafka in your Spring Boot application. By means of approximately ten lines of code, I will…. Kafka console consumer. In the above command, we created a Kafka producer to send messages to the Kafka broker. Schemas are composed of Best Java code snippets using kafka. Zookeeper is mainly used to track the status of the nodes present in the Kafka cluster and to keep track of Kafka topics, messages, etc. Dec 1, 2020 · The structured approach keeps event metadata and data together in the payload of the message or request. TIME: In this manual mode, the consumer sends an acknowledgment after a certain amount of time has passed. dragon') killDragon (@Payload () message: KillDragonMessage): any it does not output Kafka message processing. Nov 14, 2018 · Kafka Connect Deep Dive – Converters and Serialization Explained. Payloads will be read from this file and a payload will be randomly. Tasks; using Confluent. Although it’s not the newest library Python has to offer, it’s hard to find a comprehensive tutorial on how to use Apache Kafka with Python. Here’s an example of doing it using ksqlDB: If you’re Sep 15, 2017 · The Kafka Avro serialization project provides serializers. ) - debezium/debezium-examples Mar 6, 2018 · Running with Spring Boot. retriable method A Serializer is a function that can take any message and converts it into the byte array that is actually sent on the wire using the Kafka Protocol. However, I receive a runtime exception at the line of code where I am trying to 'set the bootstrap-server' property of 'conf'. Here, I will show you how to send avro messages from the client application and from Kafka Streams using Kafka Schema Registry. You will also find links to other related articles on Spring Boot and Kafka integration. assignment () method returns the set of partitions currently assigned to the consumer. @Headers : binds a method parameter method to all message headers. 7: Once the persist operation completes, and there is no errors, the Kafka transaction is committed. Kafka producers reads the messages line by line using default LineMessageReader. Image Recognition and Video Analytics. If you are looking for an intro to the Spring Cloud Stream project you should read my article about it May 23, 2020 · When multiple containers or apps are running during horizontal scaling and your only one container/application required to listen to topic. The STCEH has exception classification but that is simply whether to retry or not retry and call the recoverer immediately. serialization. Tip #3: Avoid “stop-the-world” consumer group rebalances by using cooperative rebalancing. Jul 13, 2021 · Yes; you will need to add that logic to your recoverer - ex. Sample Inbound Files for Material; Sample Inbound Files for Material Lot; Sample Inbound Files for Outside Processing (OSP) Sample Outbound Kafka Messages. ERP Export Service Kafka Topics; Structure of Messages Published to Kafka Topics; Sample Kafka Messages; Payload Structure in JSON Format; Payload Structure in B2MML Format; Response Codes Mar 28, 2020 · Later versions of Kafka (after 0. qh yn ql iv rn yi mw ni or mf