Kafka Producer
The Kafka Producer allows you to publish messages in near-real-time across worker nodes where multiple, subscribed members have access. A Kafka Producer step publishes a stream of records to one Kafka topic.
General
Enter the following information in the transformation step name field.
- Step name: Specifies the unique name of the transformation on the canvas. The Step Name is set to ‘Kafka Producer’ by default.
Kafka Connection Information
Fill in the following fields.
| Option | Description |
|---|---|
|
Hadoop cluster |
The Hadoop cluster configuration for connecting to the Kafka streaming data (messages). Multiple servers can be specified if these are part of the same cluster. For information on Hadoop clusters, see Set Up Pentaho to Connect to a Hadoop Cluster. |
|
Client ID |
The unique Client identifier, used to identify and set up a durable connection path to the server to make requests and to distinguish between different clients. |
|
Topic |
The category to which records are published. |
|
Key Field |
In Kafka, all messages can be keyed, allowing for messages to be distributed to partitions based on their keys in a default routing scheme. If no key is present, messages are randomly distributed to partitions. |
|
Message Field |
The individual record contained in a topic. |
Options Tab
Use this tab to configure the Kafka producer broker sources. For further information on these input names, see the Apache Kafka documentation site: https://kafka.apache.org/documentation/.
Metadata Injection Support
All fields of this step support metadata injection. You can use this step with ETL Metadata Injection to pass metadata to your transformation at runtime.