File

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

CLI based Ingestion

Install the Plugin

The file source works out of the box with acryl-datahub.

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 string	Set to an aspect to only read this aspect for ingestion.
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	Default: AUTO

Schema

The JSONSchema for this configuration is inlined below.

{
  "title": "FileSourceConfig",
  "type": "object",
  "properties": {
    "path": {
      "title": "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.",
      "type": "string"
    },
    "file_extension": {
      "title": "File Extension",
      "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",
      "default": ".json",
      "type": "string"
    },
    "read_mode": {
      "default": "AUTO",
      "allOf": [
        {
          "$ref": "#/definitions/FileReadMode"
        }
      ]
    },
    "aspect": {
      "title": "Aspect",
      "description": "Set to an aspect to only read this aspect for ingestion.",
      "type": "string"
    },
    "count_all_before_starting": {
      "title": "Count All Before Starting",
      "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.",
      "default": true,
      "type": "boolean"
    }
  },
  "required": [
    "path"
  ],
  "additionalProperties": false,
  "definitions": {
    "FileReadMode": {
      "title": "FileReadMode",
      "description": "An enumeration.",
      "enum": [
        "STREAM",
        "BATCH",
        "AUTO"
      ]
    }
  }
}

Code Coordinates

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

Questions

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