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46 lines
1.9 KiB
Markdown
46 lines
1.9 KiB
Markdown
---
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description: This design doc will walk through developing a connector for OpenMetadata
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---
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# Build a Connector
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Ingestion is a simple python framework to ingest the metadata from various sources.
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Please look at our framework [APIs](https://github.com/open-metadata/OpenMetadata/tree/main/ingestion/src/metadata/ingestion/api)
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## Workflow
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[workflow](https://github.com/open-metadata/OpenMetadata/blob/main/ingestion/src/metadata/ingestion/api/workflow.py) is a simple orchestration job that runs the components in an Order.
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A workflow consists of [Source](source.md), [Processor](processor.md) and [Sink](sink.md). It also provides support for [Stage](stage.md) and [BulkSink](bulksink.md).
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Workflow execution happens in serial fashion.
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1. The** Workflow** runs the **source** component first. The **source** retrieves a record from external sources and emits the record downstream.
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2. If the **processor** component is configured, the **workflow** sends the record to the **processor** next.
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3. There can be multiple **processor** components attached to the **workflow**. The **workflow** passes a record to each **processor** in the order they are configured.
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4. Once a **processor** is finished, it sends the modified record to **sink**.
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5. The above steps are repeated for each record emitted from the **source**.
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In the cases where we need aggregation over the records, we can use **stage** to write to a file or other store. Use the file written to in **stage** and pass it to **bulksink** to publish to external services such as **openmetadata** or **elasticsearch**.
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{% content-ref url="source.md" %}
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[source.md](source.md)
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{% endcontent-ref %}
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{% content-ref url="processor.md" %}
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[processor.md](processor.md)
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{% endcontent-ref %}
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{% content-ref url="sink.md" %}
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[sink.md](sink.md)
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{% endcontent-ref %}
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{% content-ref url="stage.md" %}
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[stage.md](stage.md)
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{% endcontent-ref %}
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{% content-ref url="bulksink.md" %}
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[bulksink.md](bulksink.md)
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{% endcontent-ref %}
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