Packages
eventstore
1.3.1
1.4.8
1.4.7
1.4.6
1.4.4
1.4.3
1.4.2
1.4.1
1.4.0
1.3.2
1.3.1
1.3.0
1.2.3
1.2.2
1.2.1
1.2.0
1.1.0
1.0.3
1.0.2
1.0.1
1.0.0
1.0.0-rc.0
0.17.0
0.16.2
0.16.1
0.16.0
0.15.1
0.15.0
0.14.0
0.14.0-rc.0
0.13.2
0.13.1
0.13.0
0.12.1
0.12.0
0.11.0
0.11.0-rc.0
0.10.1
0.10.0
0.9.0
0.8.1
0.8.0
0.7.4
0.7.3
0.7.2
0.7.1
0.7.0
0.6.2
0.6.1
0.6.0
0.5.2
0.5.1
0.5.0
0.4.3
0.4.2
0.4.1
0.4.0
0.3.0
0.2.1
0.2.0
0.1.0
0.0.5
0.0.4
0.0.3
0.0.2
0.0.1
Event store using PostgreSQL for persistence.
Current section
Files
Jump to
Current section
Files
lib/event_store/storage/snapshot.ex
defmodule EventStore.Storage.Snapshot do
@moduledoc false
require Logger
alias EventStore.Snapshots.SnapshotData
alias EventStore.Sql.Statements
def read_snapshot(conn, source_uuid, opts) do
{schema, opts} = Keyword.pop(opts, :schema)
query = Statements.query_snapshot(schema)
case Postgrex.query(conn, query, [source_uuid], opts) do
{:ok, %Postgrex.Result{num_rows: 0}} ->
{:error, :snapshot_not_found}
{:ok, %Postgrex.Result{rows: [row]}} ->
{:ok, to_snapshot_from_row(row)}
{:error, error} = reply ->
Logger.warn(fn ->
"Failed to read snapshot for source \"#{source_uuid}\" due to: #{inspect(error)}"
end)
reply
end
end
def record_snapshot(conn, %SnapshotData{} = snapshot, opts) do
%SnapshotData{
source_uuid: source_uuid,
source_version: source_version,
source_type: source_type,
data: data,
metadata: metadata
} = snapshot
{schema, opts} = Keyword.pop(opts, :schema)
query = Statements.insert_snapshot(schema)
params = [source_uuid, source_version, source_type, data, metadata]
case Postgrex.query(conn, query, params, opts) do
{:ok, _result} ->
:ok
{:error, error} = reply ->
Logger.warn(
"Failed to record snapshot for source \"#{source_uuid}\" at version \"#{source_version}\" due to: " <>
inspect(error)
)
reply
end
end
def delete_snapshot(conn, source_uuid, opts) do
{schema, opts} = Keyword.pop(opts, :schema)
query = Statements.delete_snapshot(schema)
case Postgrex.query(conn, query, [source_uuid], opts) do
{:ok, _result} ->
:ok
{:error, error} = reply ->
Logger.warn(
"Failed to delete snapshot for source \"#{source_uuid}\" due to: " <> inspect(error)
)
reply
end
end
defp to_snapshot_from_row([source_uuid, source_version, source_type, data, metadata, created_at]) do
%SnapshotData{
source_uuid: source_uuid,
source_version: source_version,
source_type: source_type,
data: data,
metadata: metadata,
created_at: created_at
}
end
end