# `Continuum.Runtime.Dispatcher`
[🔗](https://github.com/Yyeger/Continuum/blob/main/lib/continuum/runtime/dispatcher.ex#L1)

Polls Postgres for runnable workflow runs and starts local engines.

The dispatcher claims work with `SELECT ... FOR UPDATE SKIP LOCKED` inside a
transaction, assigns a fresh fencing token, and then resumes an engine with
that token. Multiple dispatchers can poll concurrently; locked rows are
skipped rather than contended.

# `child_spec`

Returns a specification to start this module under a supervisor.

See `Supervisor`.

# `dispatch_once`

```elixir
@spec dispatch_once(keyword()) :: {:ok, non_neg_integer()} | {:error, term()}
```

Run one dispatch pass synchronously.

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