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KafkaWatermarkTracker

laminar_connectors::kafka::watermarks

Struct KafkaWatermarkTracker 

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pub struct KafkaWatermarkTracker { /* private fields */ }
Expand description

Kafka-specific watermark tracker wrapping PartitionedWatermarkTracker.

Tracks watermarks per Kafka partition and computes a combined watermark as the minimum across all active (non-idle) partitions.

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impl KafkaWatermarkTracker

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pub fn new(source_id: usize, idle_timeout: Duration) -> Self

Creates a new Kafka watermark tracker.

§Arguments
  • source_id - Unique identifier for this source
  • idle_timeout - Duration after which an inactive partition is marked idle
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pub fn with_max_out_of_orderness(self, max_out_of_orderness: Duration) -> Self

Creates a tracker with custom out-of-orderness bound.

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pub fn source_id(&self) -> usize

Returns the source ID.

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pub fn register_partitions(&mut self, num_partitions: usize)

Registers partitions for tracking.

Call this when partitions are assigned during Kafka rebalance.

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pub fn add_partition(&mut self, partition: i32)

Adds a partition (e.g., during Kafka rebalance).

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pub fn remove_partition(&mut self, partition: i32)

Removes a partition (e.g., during Kafka rebalance).

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pub fn update_partition(&mut self, partition: i32, event_time: i64) -> bool

Updates the watermark for a partition.

§Arguments
  • partition - Kafka partition number
  • event_time - Event timestamp in milliseconds
§Returns

true if the combined watermark advanced.

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pub fn mark_idle(&mut self, partition: i32)

Marks a partition as idle.

Idle partitions are excluded from watermark computation.

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pub fn check_idle_partitions(&mut self)

Checks for idle partitions based on timeout and marks them.

Call this periodically (e.g., every poll cycle).

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pub fn current_watermark(&self) -> Option<i64>

Returns the current combined watermark.

Returns None if no partitions are registered or all are idle.

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pub fn active_partition_count(&self) -> usize

Returns the number of active (non-idle) partitions.

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pub fn idle_partition_count(&self) -> usize

Returns the number of idle partitions.

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pub fn partition_count(&self) -> usize

Returns the total number of registered partitions.

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pub fn metrics(&self) -> &WatermarkMetrics

Returns metrics for this tracker.

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pub fn partition_watermark(&self, partition: i32) -> Option<i64>

Returns the watermark for a specific partition.

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pub fn is_partition_idle(&self, partition: i32) -> bool

Returns whether a partition is idle.

Trait Implementations§

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impl Debug for KafkaWatermarkTracker

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Default for KafkaWatermarkTracker

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fn default() -> Self

Returns the “default value” for a type. Read more

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