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Event store using PostgreSQL for persistence.
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lib/event_store/snapshots/snapshotter.ex
defmodule EventStore.Snapshots.Snapshotter do
@moduledoc false
alias EventStore.Snapshots.SnapshotData
alias EventStore.Storage.Snapshot
@doc """
Read a snapshot, if available, for a given source.
"""
def read_snapshot(conn, source_uuid, serializer, opts \\ []) do
with {:ok, snapshot} <- Snapshot.read_snapshot(conn, source_uuid, opts) do
deserialized = SnapshotData.deserialize(snapshot, serializer)
{:ok, deserialized}
end
end
@doc """
Record a snapshot containing data and metadata for a given source.
Returns `:ok` on success.
"""
def record_snapshot(conn, %SnapshotData{} = snapshot, serializer, opts \\ []) do
serialized = SnapshotData.serialize(snapshot, serializer)
Snapshot.record_snapshot(conn, serialized, opts)
end
@doc """
Delete a previously recorded snapshot for a given source.
Returns `:ok` on success.
"""
def delete_snapshot(conn, source_uuid, opts \\ []) do
Snapshot.delete_snapshot(conn, source_uuid, opts)
end
end