CosIdShardingDecorator

Decorator that adapts a numeric sharding strategy for aggregate IDs using a hash function.

This class wraps a PreciseSharding implementation and converts aggregate IDs to Long values using a hash function before delegating to the underlying sharding strategy. This allows using existing numeric sharding algorithms with string-based aggregate IDs.

The default hash function extracts the sequence number from globally unique IDs, providing good distribution characteristics.

Example usage:

val numericSharding = ModuloSharding(4) // Shards into 4 buckets
val aggregateSharding = CosIdShardingDecorator(numericSharding)

val shard = aggregateSharding.sharding(aggregateId) // Returns "0", "1", "2", or "3"

See also