Edge Delta Parse Key Value Processor

The Edge Delta parse key value processor parses a key value field into structured data.

Overview

The Parse key value processor parses a string of key value pairs into an array. The processor performs a conditional transformation based on whether the attributes field is a map or not. If attributes is already a map, the processor will merge the parsed body into it. If it’s not a map, the processor will replace it completely with the parsed body.

Configuration

Consider this log:

service=auth user=65532 action=login status=success location=us-east-1 service=billing action=invoice status=failure location=eu-west-2

It consists of key value pairs. The following configuration parses it using the = and space delimiters.

This is the YAML version:

- name: Multi Processor_fa8d
  type: sequence
  processors:
  - type: ottl_transform
    metadata: '{"id":"O2M9vOgcmkS3yFS3G5Vfk","type":"parse-key-value","name":"Parse
      Key Value"}'
    statements: |-
      merge_maps(attributes, ParseKeyValue(body, "=", " "), "upsert") where IsMap(attributes)
      set(attributes, ParseKeyValue(body, "=", " ")) where not IsMap(attributes))      

Options

Select a telemetry type

You can specify, log, metric, trace or all. It is specified using the interface, which generates a YAML list item for you under the data_types parameter. This defines the data item types against which the processor must operate. If data_types is not specified, the default value is all. It is optional.

It is defined in YAML as follows:

- name: multiprocessor
  type: sequence
  processors:
  - type: <processor type>
    data_types:
    - log

condition

The condition parameter contains a conditional phrase of an OTTL statement. It restricts operation of the processor to only data items where the condition is met. Those data items that do not match the condition are passed without processing. You configure it in the interface and an OTTL condition is generated. It is optional. You can select one of the following operators:

Operator Name Description Example
== Equal to Returns true if both values are exactly the same attributes["status"] == "OK"
!= Not equal to Returns true if the values are not the same attributes["level"] != "debug"
> Greater than Returns true if the left value is greater than the right attributes["duration_ms"] > 1000
>= Greater than or equal Returns true if the left value is greater than or equal to the right attributes["score"] >= 90
< Less than Returns true if the left value is less than the right attributes["load"] < 0.75
<= Less than or equal Returns true if the left value is less than or equal to the right attributes["retries"] <= 3
matches Regex match Returns true if the string matches a regular expression isMatch(attributes["name"], ".*\\.name$"

It is defined in YAML as follows:

- name: _multiprocessor
  type: sequence
  processors:
  - type: <processor type>
    condition: attributes["request"]["path"] == "/json/view"

Parse from

Specify the field containing the key value data.

Assign to

Specify the field where you want the parsed object to be saved.

Pair delimiter

Specify the character that separates the pairs from each other.

Delimiter

Specify the character that separates the key from the value within each pair.

Final

Determines whether successfully processed data items should continue through the remaining processors in the same processor stack. If final is set to true, data items output by this processor are not passed to subsequent processors within the node—they are instead emitted to downstream nodes in the pipeline (e.g., a destination). Failed items are always passed to the next processor, regardless of this setting.

The UI provides a slider to configure this setting. The default is false. It is defined in YAML as follows:

- name: multiprocessor
  type: sequence
  processors:
    - type: <processor type>
    final: true

Keep original telemetry item

Controls whether the original, unmodified telemetry item is preserved after processing. If keep_item is set to true, the processor emits both:

  • The original telemetry item (e.g., a log), and
  • Any new item generated by the processor (e.g., a metric extracted from the log)

Both items are passed to the next processor in the stack unless final is also set.

Interaction with final

If final: true is enabled, any successfully processed data items, whether original, newly created, or both, exit the processor stack or node immediately. No subsequent processors within the same node are evaluated, although downstream processing elsewhere in the pipeline continues. This means:

  • If keep_item: true and final: true, both the original and processed items bypass the remaining processors in the current node and are forwarded to downstream nodes (such as destinations).
  • If keep_item: false and final: true, only the processed item continues beyond this processor, skipping subsequent processors in the stack, and the original item is discarded.

Note: If the data item fails to be processed, final has no effect, the item continues through the remaining processors in the node regardless of the keep_item setting.

The app provides a slider to configure keep_item. The default is false.

- name: ed_gateway_output_a3fa_multiprocessor
  type: sequence
  processors:
    - type: <processor_type>
      keep_item: true
      final: true

See Also