This release is a pre-release and may not be stable for production use.
starfish-outbox
A durable, per-identity offline write-queue — the client-side complement to the
server-side queuing extension.
Generic over the queued item: you own what an item is, supply its dedup id, and a
send that performs the real write. The queue handles persistence (write-through to a
LocalCache), dedup-by-id, single-shot claim (no double-send), attempt counting with
auto-retry-then-fail, crash-safe recovery of stuck sending entries, and subscriptions.
drain_outbox is connectivity-agnostic — you trigger it on whatever reconnect signal you have.
Install
pip install starfish-outbox
Usage
from starfish_outbox import OutboxQueue, drain_outbox
queue: OutboxQueue = OutboxQueue(local_cache) # local_cache: async get_item / set_item / remove_item
await queue.hydrate(f"outbox.{user_id}")
# Enqueue a write while offline (the id is yours to thread into the eventual write):
await queue.enqueue(write_id, {"path": path, "body": body})
# Drain on reconnect:
async def send(entry):
await client.push(entry.item["path"], entry.item["body"], base_hash_for(entry.item["path"]))
await drain_outbox(queue, send, max_attempts=5)
Mutating methods (enqueue / claim / remove / retry / …) are async because each
writes through to the cache; get / pending / subscribe are synchronous. JSON-compatible
on disk with the TypeScript @drakkar.software/starfish-outbox.
1 maintainer
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