copy_values
The copy_values processor copies values within an event and is a mutate event processor.
Configuration
You can configure the copy_values processor with the following options.
| Option | Required | Description |
|---|---|---|
entries | Yes | A list of entries to be copied in an event. |
from_key | Yes | The key of the entry to be copied. |
to_key | Yes | The key of the new entry to be added. |
overwrite_if_key_exists | No | When set to true, the existing value is overwritten if key already exists in the event. The default value is false. |
Usage
To get started, create the following pipeline.yaml file:
pipeline:
source:
...
....
processor:
- copy_values:
entries:
- from_key: "message"
to_key: "newMessage"
overwrite_if_to_key_exists: true
sink:
Next, create a log file named logs_json.log and replace the path in the file source of your pipeline.yaml file with that filepath. For more information, see Configuring Data Prepper.
For example, before you run the copy_values processor, if the logs_json.log file contains the following event record:
{"message": "hello"}
When you run this processor, it parses the message into the following output:
{"message": "hello", "newMessage": "hello"}
If newMessage already exists, its existing value is overwritten with value.