Metadata File

Important Capabilities

Capability	Status	Notes
Detect Deleted Entities	✅	Enabled by default via stateful ingestion.
Test Connection	✅	Enabled by default.

This plugin pulls metadata from a previously generated file. The metadata file sink can produce such files, and a number of samples are included in the examples/mce_files directory.

CLI based Ingestion

Starter Recipe

Check out the following recipe to get started with ingestion! See below for full configuration options.

For general pointers on writing and running a recipe, see our main recipe guide.

source:
  type: file
  config:
    # Coordinates
    filename: ./path/to/mce/file.json

sink:
  # sink configs

Config Details

Options

Note that a . is used to denote nested fields in the YAML recipe.

Field	Description
path ✅ string	File path to folder or file to ingest, or URL to a remote file. If pointed to a folder, all files with extension {file_extension} (default json) within that folder will be processed.
aspect One of string, null	Set to an aspect to only read this aspect for ingestion. Default: None
count_all_before_starting boolean	When enabled, counts total number of records in the file before starting. Used for accurate estimation of completion time. Turn it off if startup time is too high. Default: True
file_extension string	When providing a folder to use to read files, set this field to control file extensions that you want the source to process. * is a special value that means process every file regardless of extension Default: .json
read_mode Enum	One of: "STREAM", "BATCH", "AUTO"
stateful_ingestion One of StatefulStaleMetadataRemovalConfig, null	Default: None
stateful_ingestion.enabled boolean	Whether or not to enable stateful ingest. Default: True if a pipeline_name is set and either a datahub-rest sink or datahub_api is specified, otherwise False Default: False
stateful_ingestion.fail_safe_threshold number	Prevents large amount of soft deletes & the state from committing from accidental changes to the source configuration if the relative change percent in entities compared to the previous state is above the 'fail_safe_threshold'. Default: 75.0
stateful_ingestion.remove_stale_metadata boolean	Soft-deletes the entities present in the last successful run but missing in the current run with stateful_ingestion enabled. Default: True

Schema

The JSONSchema for this configuration is inlined below.

{
  "$defs": {
    "FileReadMode": {
      "enum": [
        "STREAM",
        "BATCH",
        "AUTO"
      ],
      "title": "FileReadMode",
      "type": "string"
    },
    "StatefulStaleMetadataRemovalConfig": {
      "additionalProperties": false,
      "description": "Base specialized config for Stateful Ingestion with stale metadata removal capability.",
      "properties": {
        "enabled": {
          "default": false,
          "description": "Whether or not to enable stateful ingest. Default: True if a pipeline_name is set and either a datahub-rest sink or `datahub_api` is specified, otherwise False",
          "title": "Enabled",
          "type": "boolean"
        },
        "remove_stale_metadata": {
          "default": true,
          "description": "Soft-deletes the entities present in the last successful run but missing in the current run with stateful_ingestion enabled.",
          "title": "Remove Stale Metadata",
          "type": "boolean"
        },
        "fail_safe_threshold": {
          "default": 75.0,
          "description": "Prevents large amount of soft deletes & the state from committing from accidental changes to the source configuration if the relative change percent in entities compared to the previous state is above the 'fail_safe_threshold'.",
          "maximum": 100.0,
          "minimum": 0.0,
          "title": "Fail Safe Threshold",
          "type": "number"
        }
      },
      "title": "StatefulStaleMetadataRemovalConfig",
      "type": "object"
    }
  },
  "properties": {
    "stateful_ingestion": {
      "anyOf": [
        {
          "$ref": "#/$defs/StatefulStaleMetadataRemovalConfig"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "path": {
      "description": "File path to folder or file to ingest, or URL to a remote file. If pointed to a folder, all files with extension {file_extension} (default json) within that folder will be processed.",
      "title": "Path",
      "type": "string"
    },
    "file_extension": {
      "default": ".json",
      "description": "When providing a folder to use to read files, set this field to control file extensions that you want the source to process. * is a special value that means process every file regardless of extension",
      "title": "File Extension",
      "type": "string"
    },
    "read_mode": {
      "$ref": "#/$defs/FileReadMode",
      "default": "AUTO"
    },
    "aspect": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null,
      "description": "Set to an aspect to only read this aspect for ingestion.",
      "title": "Aspect"
    },
    "count_all_before_starting": {
      "default": true,
      "description": "When enabled, counts total number of records in the file before starting. Used for accurate estimation of completion time. Turn it off if startup time is too high.",
      "title": "Count All Before Starting",
      "type": "boolean"
    }
  },
  "required": [
    "path"
  ],
  "title": "FileSourceConfig",
  "type": "object"
}

Code Coordinates

• Class Name: datahub.ingestion.source.file.GenericFileSource
• Browse on GitHub

Questions

If you've got any questions on configuring ingestion for Metadata File, feel free to ping us on our Slack.