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DistributedCheckpointer

oxirs_stream::distributed_state

Struct DistributedCheckpointer 

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

Checkpoints stream state across nodes with Merkle verification.

Each node submits its local checkpoint; once all expected nodes contribute, a global checkpoint is formed and its combined Merkle root is verified.

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impl DistributedCheckpointer

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pub fn new(expected_nodes: HashSet<String>) -> Self

Creates a new checkpointer expecting contributions from the given nodes.

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pub fn submit_node_checkpoint( &self, checkpoint: NodeCheckpoint, ) -> StateResult<Option<GlobalDistributedCheckpoint>>

Submits a node checkpoint.

Returns Some(GlobalDistributedCheckpoint) when all expected nodes have contributed for this checkpoint_id.

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pub fn latest_checkpoint(&self) -> Option<GlobalDistributedCheckpoint>

Returns the latest completed global checkpoint, if any.

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pub fn all_checkpoints(&self) -> Vec<GlobalDistributedCheckpoint>

Returns all completed checkpoints.

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pub fn stats(&self) -> CheckpointerStats

Returns checkpointer statistics.

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pub fn compute_merkle_root(data: &[u8]) -> String

Computes a simple Merkle root as the hex-encoded SHA-256 of the data.

In a production system this would build a full Merkle tree; here we use a single-level hash for correctness without external crypto deps.

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