# `SuperPi.Durable.DocCache`
[🔗](https://github.com/oleksandr/super-pi-beam/blob/v0.1.0/lib/super_pi/durable/doc_cache.ex#L1)

Keeps the document cache (`SuperPi.Durable.Doc`) coherent across nodes.

After a commit, the writer broadcasts the keys it wrote (`broadcast/1`). Every other node drops
those entries and reads the new value from the database on its next read. On a single node
nothing is sent.

This is best effort and is backed by the cache TTL: a node can still read an old value for a
moment after another node commits.

# `broadcast`

Tells the other nodes that these cache keys changed. Does nothing without other nodes.

# `child_spec`

Returns a specification to start this module under a supervisor.

See `Supervisor`.

# `start_link`

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*Consult [api-reference.md](api-reference.md) for complete listing*