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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1 @@ | ||
| [] |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,3 +1,9 @@ | ||
| defmodule Etso do | ||
| @moduledoc false | ||
| @moduledoc """ | ||
| Top-level module for Etso. | ||
| """ | ||
|
|
||
| @type repo :: Ecto.Repo.t() | ||
| @type schema :: module() | ||
| @type table :: :ets.tab() | ||
| end |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,36 +1,56 @@ | ||
| defmodule Etso.Adapter do | ||
| @moduledoc """ | ||
| Used as an Adapter in Repo modules, which transparently spins up one ETS table for | ||
| each Schema used with the Repo, namespaced to the Repo to allow concurrent running | ||
| of multiple Repositories. | ||
| Used as an Adapter in Repo modules, which transparently spins up one ETS table for each Schema | ||
| used with the Repo, namespaced to the Repo to allow concurrent running of multiple Repositories. | ||
| The Etso Adapter implements the `Ecto.Adapter.Schema` and `Ecto.Adapter.Queryable` behaviours. | ||
| To use the Etso Adapter in your application, define a Repo like this: | ||
| defmodule MyApp.Repo do | ||
| @otp_app Mix.Project.config()[:app] | ||
| use Ecto.Repo, otp_app: @otp_app, adapter: Etso.Adapter | ||
| end | ||
| """ | ||
|
|
||
| @behaviour Ecto.Adapter | ||
| @behaviour Ecto.Adapter.Schema | ||
| @behaviour Ecto.Adapter.Queryable | ||
|
|
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| defmacro __before_compile__(_opts), do: :ok | ||
|
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| @doc false | ||
| def ensure_all_started(_config, _type), do: {:ok, []} | ||
|
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| @doc false | ||
| def init(config) do | ||
| {:ok, repo} = Keyword.fetch(config, :repo) | ||
| child_spec = __MODULE__.Supervisor.child_spec(repo) | ||
| adapter_meta = %{repo: repo} | ||
| adapter_meta = %__MODULE__.Meta{repo: repo} | ||
| {:ok, child_spec, adapter_meta} | ||
| end | ||
|
|
||
| @doc false | ||
| def checkout(_, _, fun), do: fun.() | ||
|
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| @doc false | ||
| def loaders(:binary_id, type), do: [Ecto.UUID, type] | ||
| def loaders(:embed_id, type), do: [Ecto.UUID, type] | ||
| def loaders(_, type), do: [type] | ||
|
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||
| @doc false | ||
| def dumpers(:binary_id, type), do: [type, Ecto.UUID] | ||
| def dumpers(:embed_id, type), do: [type, Ecto.UUID] | ||
| def dumpers(_, type), do: [type] | ||
|
|
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| defp get_table(adapter_meta, schema) do | ||
| __MODULE__.TableRegistry.get_table(adapter_meta.repo, schema) | ||
| end | ||
| for module <- [__MODULE__.Behaviour.Schema, __MODULE__.Behaviour.Queryable] do | ||
| for {name, arity} <- module.__info__(:functions) do | ||
| args = Enum.map(1..arity, &{:"arg_#{&1}", [], Elixir}) | ||
|
|
||
| use __MODULE__.Behaviour.Schema | ||
| use __MODULE__.Behaviour.Queryable | ||
| @doc false | ||
| def unquote(name)(unquote_splicing(args)) do | ||
| unquote(module).unquote(name)(unquote_splicing(args)) | ||
| end | ||
| end | ||
| end | ||
| end |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,51 +1,50 @@ | ||
| defmodule Etso.Adapter.Behaviour.Queryable do | ||
| defmacro __using__(_) do | ||
| quote do | ||
| @behaviour Ecto.Adapter.Queryable | ||
|
|
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| def prepare(:all, query) do | ||
| {:nocache, query} | ||
| end | ||
|
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| def execute(adapter_meta, _, {:nocache, query}, params, _) do | ||
| {_, schema} = query.from.source | ||
| ets_table = get_table(adapter_meta, schema) | ||
| ets_match = Etso.ETS.MatchSpecification.build(query, params) | ||
| ets_objects = :ets.select(ets_table, [ets_match]) | ||
| {length(ets_objects), ets_objects} | ||
| end | ||
|
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| def stream(adapter_meta, _, {:nocache, query}, params, options) do | ||
| {_, schema} = query.from.source | ||
| ets_table = get_table(adapter_meta, schema) | ||
| ets_match = Etso.ETS.MatchSpecification.build(query, params) | ||
| ets_limit = Keyword.get(options, :max_rows, 500) | ||
| stream_start_fun = fn -> stream_start(ets_table, ets_match, ets_limit) end | ||
| stream_next_fun = fn acc -> stream_next(acc) end | ||
| stream_after_fun = fn acc -> stream_after(ets_table, acc) end | ||
| Stream.resource(stream_start_fun, stream_next_fun, stream_after_fun) | ||
| end | ||
|
|
||
| defp stream_start(ets_table, ets_match, ets_limit) do | ||
| :ets.safe_fixtable(ets_table, true) | ||
| :ets.select(ets_table, [ets_match], ets_limit) | ||
| end | ||
|
|
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| defp stream_next(:"$end_of_table") do | ||
| {:halt, :ok} | ||
| end | ||
|
|
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| defp stream_next({ets_objects, ets_continuation}) do | ||
| {[{length(ets_objects), ets_objects}], :ets.select(ets_continuation)} | ||
| end | ||
|
|
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| defp stream_after(ets_table, :ok) do | ||
| :ets.safe_fixtable(ets_table, false) | ||
| end | ||
|
|
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| defp stream_after(_, acc) do | ||
| acc | ||
| end | ||
| end | ||
| @moduledoc false | ||
|
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| alias Etso.Adapter.TableRegistry | ||
| alias Etso.ETS.MatchSpecification | ||
|
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| def prepare(:all, query) do | ||
| {:nocache, query} | ||
| end | ||
|
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| def execute(%{repo: repo}, _, {:nocache, query}, params, _) do | ||
| {_, schema} = query.from.source | ||
| {:ok, ets_table} = TableRegistry.get_table(repo, schema) | ||
| ets_match = MatchSpecification.build(query, params) | ||
| ets_objects = :ets.select(ets_table, [ets_match]) | ||
| {length(ets_objects), ets_objects} | ||
| end | ||
|
|
||
| def stream(%{repo: repo}, _, {:nocache, query}, params, options) do | ||
| {_, schema} = query.from.source | ||
| {:ok, ets_table} = TableRegistry.get_table(repo, schema) | ||
| ets_match = MatchSpecification.build(query, params) | ||
| ets_limit = Keyword.get(options, :max_rows, 500) | ||
| stream_start_fun = fn -> stream_start(ets_table, ets_match, ets_limit) end | ||
| stream_next_fun = fn acc -> stream_next(acc) end | ||
| stream_after_fun = fn acc -> stream_after(ets_table, acc) end | ||
| Stream.resource(stream_start_fun, stream_next_fun, stream_after_fun) | ||
| end | ||
|
|
||
| defp stream_start(ets_table, ets_match, ets_limit) do | ||
| :ets.safe_fixtable(ets_table, true) | ||
| :ets.select(ets_table, [ets_match], ets_limit) | ||
| end | ||
|
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| defp stream_next(:"$end_of_table") do | ||
| {:halt, :ok} | ||
| end | ||
|
|
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| defp stream_next({ets_objects, ets_continuation}) do | ||
| {[{length(ets_objects), ets_objects}], :ets.select(ets_continuation)} | ||
| end | ||
|
|
||
| defp stream_after(ets_table, :ok) do | ||
| :ets.safe_fixtable(ets_table, false) | ||
| end | ||
|
|
||
| defp stream_after(_, acc) do | ||
| acc | ||
| end | ||
| end |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,58 +1,53 @@ | ||
| defmodule Etso.Adapter.Behaviour.Schema do | ||
| defmacro __using__(_) do | ||
| quote do | ||
| @behaviour Ecto.Adapter.Schema | ||
|
|
||
| def autogenerate(:id), do: :erlang.unique_integer() | ||
| def autogenerate(:binary_id), do: Ecto.UUID.bingenerate() | ||
| def autogenerate(:embed_id), do: Ecto.UUID.bingenerate() | ||
|
|
||
| def insert_all(adapter_meta, schema_meta, _header, entries, on_conflict, returning, options) do | ||
| %{schema: schema, source: source} = schema_meta | ||
| ets_table = get_table(adapter_meta, schema) | ||
| ets_field_names = Etso.ETS.TableStructure.field_names(schema) | ||
| ets_changes = Etso.ETS.TableStructure.entries_to_tuples(ets_field_names, entries) | ||
| ets_result = :ets.insert_new(ets_table, ets_changes) | ||
| if ets_result, do: {length(ets_changes), nil}, else: {0, nil} | ||
| end | ||
|
|
||
| def insert(adapter_meta, schema_meta, fields, on_conflict, returning, options) do | ||
| %{schema: schema, source: source} = schema_meta | ||
| ets_table = get_table(adapter_meta, schema) | ||
| ets_field_names = Etso.ETS.TableStructure.field_names(schema) | ||
| ets_changes = Etso.ETS.TableStructure.fields_to_tuple(ets_field_names, fields) | ||
| ets_result = :ets.insert_new(ets_table, ets_changes) | ||
| if ets_result, do: {:ok, []}, else: {:invalid, []} | ||
| end | ||
|
|
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| def update(adapter_meta, schema_meta, fields, filters, [] = returning, _options) do | ||
| %{schema: schema, source: source} = schema_meta | ||
| [key_name] = schema.__schema__(:primary_key) | ||
| [{^key_name, key}] = filters | ||
| ets_updates = build_ets_updates(schema, fields) | ||
| ets_table = get_table(adapter_meta, schema) | ||
| ets_result = :ets.update_element(ets_table, key, ets_updates) | ||
| if ets_result, do: {:ok, []}, else: {:error, :stale} | ||
| end | ||
|
|
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| def delete(adapter_meta, schema_meta, filters, _options) do | ||
| %{schema: schema, source: source} = schema_meta | ||
| [key_name] = schema.__schema__(:primary_key) | ||
| [{^key_name, key}] = filters | ||
| ets_table = get_table(adapter_meta, schema) | ||
| ets_result = :ets.delete(ets_table, key) | ||
| {:ok, []} | ||
| end | ||
|
|
||
| defp build_ets_updates(schema, fields) do | ||
| ets_field_names = Etso.ETS.TableStructure.field_names(schema) | ||
|
|
||
| for {field_name, field_value} <- fields do | ||
| position_fun = fn x -> x == field_name end | ||
| position = 1 + Enum.find_index(ets_field_names, position_fun) | ||
| {position, field_value} | ||
| end | ||
| end | ||
| @moduledoc false | ||
|
|
||
| alias Etso.Adapter.TableRegistry | ||
| alias Etso.ETS.TableStructure | ||
|
|
||
| def autogenerate(:id), do: :erlang.unique_integer() | ||
| def autogenerate(:binary_id), do: Ecto.UUID.bingenerate() | ||
| def autogenerate(:embed_id), do: Ecto.UUID.bingenerate() | ||
|
|
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| def insert_all(%{repo: repo}, %{schema: schema}, _, entries, _, _, _) do | ||
| {:ok, ets_table} = TableRegistry.get_table(repo, schema) | ||
| ets_field_names = TableStructure.field_names(schema) | ||
| ets_changes = TableStructure.entries_to_tuples(ets_field_names, entries) | ||
| ets_result = :ets.insert_new(ets_table, ets_changes) | ||
| if ets_result, do: {length(ets_changes), nil}, else: {0, nil} | ||
| end | ||
|
|
||
| def insert(%{repo: repo}, %{schema: schema}, fields, _, _, _) do | ||
| {:ok, ets_table} = TableRegistry.get_table(repo, schema) | ||
| ets_field_names = TableStructure.field_names(schema) | ||
| ets_changes = TableStructure.fields_to_tuple(ets_field_names, fields) | ||
| ets_result = :ets.insert_new(ets_table, ets_changes) | ||
| if ets_result, do: {:ok, []}, else: {:invalid, []} | ||
| end | ||
|
|
||
| def update(%{repo: repo}, %{schema: schema}, fields, filters, [], _) do | ||
| {:ok, ets_table} = TableRegistry.get_table(repo, schema) | ||
| [key_name] = schema.__schema__(:primary_key) | ||
| [{^key_name, key}] = filters | ||
| ets_updates = build_ets_updates(schema, fields) | ||
| ets_result = :ets.update_element(ets_table, key, ets_updates) | ||
| if ets_result, do: {:ok, []}, else: {:error, :stale} | ||
| end | ||
|
|
||
| def delete(%{repo: repo}, %{schema: schema}, filters, _) do | ||
| {:ok, ets_table} = TableRegistry.get_table(repo, schema) | ||
| [key_name] = schema.__schema__(:primary_key) | ||
| [{^key_name, key}] = filters | ||
| :ets.delete(ets_table, key) | ||
| {:ok, []} | ||
| end | ||
|
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| defp build_ets_updates(schema, fields) do | ||
| ets_field_names = TableStructure.field_names(schema) | ||
|
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| for {field_name, field_value} <- fields do | ||
| position_fun = fn x -> x == field_name end | ||
| position = 1 + Enum.find_index(ets_field_names, position_fun) | ||
| {position, field_value} | ||
| end | ||
| end | ||
| end |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,8 +1,7 @@ | ||
| defmodule Etso.Adapter.Meta do | ||
| defstruct repo: nil, meta_table_name: nil | ||
| @moduledoc false | ||
|
|
||
| @type t :: %__MODULE__{ | ||
| repo: module(), | ||
| meta_table_name: term() | ||
| } | ||
| @type t :: %__MODULE__{repo: Ecto.Repo.t()} | ||
| @enforce_keys ~w(repo)a | ||
| defstruct repo: nil | ||
| end |
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