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Add support for fetch.wait.max.ms Kafka consumer config #197

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Add support for fetch.wait.max.ms Kafka consumer config #197

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f7bf80c
Add support for `fetch.wait.max.ms` Kafka consumer config
supersonicbyte Jun 29, 2025
e427727
run swift format
supersonicbyte Jun 30, 2025
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15 changes: 15 additions & 0 deletions Sources/Kafka/Configuration/KafkaConsumerConfiguration.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -188,6 +188,20 @@ public struct KafkaConsumerConfiguration {
}
}

/// The maximum amount of time the server will block before answering the fetch request
/// there isn’t sufficient data to immediately satisfy the requirement given by fetch.min.bytes.
/// Default: `.milliseconds(500)`
public var maximumFetchWaitTime: Duration = .milliseconds(500) {
didSet {
if maximumFetchWaitTime != .zero {
precondition(
maximumFetchWaitTime.canBeRepresentedAsMilliseconds,
"Lowest granularity is milliseconds"
)
}
}
}

/// Topic metadata options.
public var topicMetadata: KafkaConfiguration.TopicMetadataOptions = .init()

Expand Down Expand Up @@ -260,6 +274,7 @@ extension KafkaConsumerConfiguration {
resultDict["receive.message.max.bytes"] = String(maximumReceiveMessageBytes)
resultDict["max.in.flight.requests.per.connection"] = String(maximumInFlightRequestsPerConnection)
resultDict["metadata.max.age.ms"] = String(maximumMetadataAge.inMilliseconds)
resultDict["fetch.wait.max.ms"] = String(maximumFetchWaitTime.inMilliseconds)
resultDict["topic.metadata.refresh.interval.ms"] = String(topicMetadata.refreshInterval.rawValue)
resultDict["topic.metadata.refresh.fast.interval.ms"] = String(topicMetadata.refreshFastInterval.inMilliseconds)
resultDict["topic.metadata.refresh.sparse"] = String(topicMetadata.isSparseRefreshingEnabled)
Expand Down