Write a record to a topic
Produce one record from the UI, as text, bytes, or JSON encoded with a registry schema.
To write records, the cluster needs writable: true, and you need the produce privilege. klens never writes to an internal topic.
Produce a record
- Open a topic and select Produce record.
- Optional: pick a Partition. With Any, the producer picks one, by the hash of the key when there is a key.
- For the Key, pick an encoding and enter the key. The key is Null by default, which writes a record without a key.
- For the Value, pick an encoding and enter the value.
- Optional: select Add header and enter a Name and a Value for each header.
- Select Produce.
The encodings are these:
| Encoding | Writes |
|---|---|
| Text | The text as UTF-8. |
| Base64 | The bytes the base64 text encodes. |
| Schema | The JSON you enter, encoded with the schema you pick. Shown when the cluster has a schema registry. |
| Null | No key, or a tombstone value. A tombstone deletes the key from a compacted topic. |
When you have the records privilege, the new record opens after Kafka stores it. Otherwise, the sheet shows the partition and the offset.
If the JSON does not fit the schema, klens refuses the record with UNENCODABLE and writes nothing.
Write a copy of a record
- Open a record on the Data tab.
- Select Duplicate this record. The Produce record sheet opens with the partition, key, value, and headers of the record.
- Change what you need, and select Produce.
Duplicate this record appears only when klens shows the exact bytes of the record. It does not appear for a value that klens decoded or obfuscated.