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Configuration Properties

Topic Override Properties

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  • Overview
  • Settings
  • Example

Overview

Use the following MongoDB Kafka sink connector configuration settings to override global or default property settings for specific topics.

For a list of sink connector configuration settings organized by category, see the guide on Sink Connector Configuration Properties.

Settings

Name
Description
topic.override.<topicName>.<propertyName>
Type: string

Description:
Specify a topic and property name to override the corresponding global or default property setting.

For example, the topic.override.foo.collection=bar setting instructs
the sink connector to store data from the foo topic in the bar
collection.

You can specify any valid configuration setting in the
<propertyName> segment on a per-topic basis except
connection.uri and topics.

Default: ""
Accepted Values: Accepted values specific to the overridden property

Example

You can override the sink connector to sink data from specific topics. The following example configuration shows how you can define configuration settings for a topic named topicA:

topic.override.topicA.collection=collectionA
topic.override.topicA.max.batch.size=100
topic.override.topicA.document.id.strategy=com.mongodb.kafka.connect.sink.processor.id.strategy.UuidStrategy
topic.override.topicA.post.processor.chain=com.mongodb.kafka.connect.sink.processor.DocumentIdAdder,com.mongodb.kafka.connect.sink.processor.BlockListValueProjector
topic.override.topicA.value.projection.type=BlockList
topic.override.topicA.value.projection.list=k2,k4

After applying these configuration settings, the sink connector performs the following for data consumed from topicA:

  • Write documents to the MongoDB collection collectionA in batches of up to 100.

  • Generate a UUID value for each new document and write it to the _id field.

  • Omit fields k2 and k4 from the value projection using the BlockList projection type.

For an example of how to configure the Block List Projector, see the Post Processors guide.

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