✨ New repository helpers on asyncpg (ITISFoundation#6465)

Author: pcrespov

packages/postgres-database/src/simcore_postgres_database/models/products.py

@@ -41,8 +41,6 @@ class Vendor(TypedDict, total=False):
     invitation_url: str  # How to request a trial invitation? (if applies)
     invitation_form: bool  # If True, it takes precendence over invitation_url and asks the FE to show the form (if defined)
 
-    has_landing_page: bool  # Is Landing page enabled
-
     release_notes_url_template: str  # a template url where `{vtag}` will be replaced, eg: "http://example.com/{vtag}.md"
 
 

packages/postgres-database/src/simcore_postgres_database/utils_repos.py

@@ -0,0 +1,43 @@
+import logging
+from collections.abc import AsyncIterator
+from contextlib import asynccontextmanager
+
+from sqlalchemy.ext.asyncio import AsyncConnection, AsyncEngine
+
+_logger = logging.getLogger(__name__)
+
+
+@asynccontextmanager
+async def pass_or_acquire_connection(
+    engine: AsyncEngine, connection: AsyncConnection | None = None
+) -> AsyncIterator[AsyncConnection]:
+    # NOTE: When connection is passed, the engine is actually not needed
+    # NOTE: Creator is responsible of closing connection
+    is_connection_created = connection is None
+    if is_connection_created:
+        connection = await engine.connect()
+    try:
+        assert connection  # nosec
+        yield connection
+    finally:
+        assert connection  # nosec
+        assert not connection.closed  # nosec
+        if is_connection_created and connection:
+            await connection.close()
+
+
+@asynccontextmanager
+async def transaction_context(
+    engine: AsyncEngine, connection: AsyncConnection | None = None
+):
+    async with pass_or_acquire_connection(engine, connection) as conn:
+        if conn.in_transaction():
+            async with conn.begin_nested():  # inner transaction (savepoint)
+                yield conn
+        else:
+            try:
+                async with conn.begin():  # outer transaction (savepoint)
+                    yield conn
+            finally:
+                assert not conn.closed  # nosec
+                assert not conn.in_transaction()  # nosec

packages/postgres-database/tests/conftest.py

@@ -4,6 +4,7 @@
 # pylint: disable=unused-variable
 
 import uuid
+import warnings
 from collections.abc import AsyncIterator, Awaitable, Callable, Iterator
 from pathlib import Path
 
@@ -37,6 +38,7 @@
     user_to_groups,
     users,
 )
+from sqlalchemy.ext.asyncio import AsyncEngine, create_async_engine
 
 pytest_plugins = [
     "pytest_simcore.pytest_global_environs",
@@ -81,6 +83,30 @@ def _make(is_async=True) -> Awaitable[Engine] | sa.engine.base.Engine:
     return _make
 
 
+@pytest.fixture
+def make_asyncpg_engine(postgres_service: str) -> Callable[[bool], AsyncEngine]:
+    # NOTE: users is responsible of `await engine.dispose()`
+    dsn = postgres_service.replace("postgresql://", "postgresql+asyncpg://")
+    minsize = 1
+    maxsize = 50
+
+    def _(echo: bool):
+        engine: AsyncEngine = create_async_engine(
+            dsn,
+            pool_size=minsize,
+            max_overflow=maxsize - minsize,
+            connect_args={
+                "server_settings": {"application_name": "postgres_database_tests"}
+            },
+            pool_pre_ping=True,  # https://docs.sqlalchemy.org/en/14/core/pooling.html#dealing-with-disconnects
+            future=True,  # this uses sqlalchemy 2.0 API, shall be removed when sqlalchemy 2.0 is released
+            echo=echo,
+        )
+        return engine
+
+    return _
+
+
 def is_postgres_responsive(dsn) -> bool:
     """Check if something responds to ``url``"""
     try:
@@ -107,6 +133,11 @@ def pg_sa_engine(
 ) -> Iterator[sa.engine.Engine]:
     """
     Runs migration to create tables and return a sqlalchemy engine
+
+    NOTE: use this fixture to ensure pg db:
+        - up,
+        - responsive,
+        - init (w/ tables) and/or migrated
     """
     # NOTE: Using migration to upgrade/downgrade is not
     # such a great idea since these tests are used while developing
@@ -142,29 +173,56 @@ def pg_sa_engine(
 
 
 @pytest.fixture
-async def pg_engine(
+async def aiopg_engine(
     pg_sa_engine: sa.engine.Engine, make_engine: Callable
 ) -> AsyncIterator[Engine]:
     """
     Return an aiopg.sa engine connected to a responsive and migrated pg database
     """
-    async_engine = await make_engine(is_async=True)
 
-    yield async_engine
+    aiopg_sa_engine = await make_engine(is_async=True)
+
+    warnings.warn(
+        "The 'aiopg_engine' is deprecated since we are replacing `aiopg` library by `sqlalchemy.ext.asyncio`."
+        "SEE https://github.com/ITISFoundation/osparc-simcore/issues/4529. "
+        "Please use 'asyncpg_engine' instead.",
+        DeprecationWarning,
+        stacklevel=2,
+    )
+
+    yield aiopg_sa_engine
 
     # closes async-engine connections and terminates
-    async_engine.close()
-    await async_engine.wait_closed()
-    async_engine.terminate()
+    aiopg_sa_engine.close()
+    await aiopg_sa_engine.wait_closed()
+    aiopg_sa_engine.terminate()
 
 
 @pytest.fixture
-async def connection(pg_engine: Engine) -> AsyncIterator[SAConnection]:
+async def connection(aiopg_engine: Engine) -> AsyncIterator[SAConnection]:
     """Returns an aiopg.sa connection from an engine to a fully furnished and ready pg database"""
-    async with pg_engine.acquire() as _conn:
+    async with aiopg_engine.acquire() as _conn:
         yield _conn
 
 
+@pytest.fixture
+async def asyncpg_engine(
+    is_pdb_enabled: bool,
+    pg_sa_engine: sa.engine.Engine,
+    make_asyncpg_engine: Callable[[bool], AsyncEngine],
+) -> AsyncIterator[AsyncEngine]:
+
+    assert (
+        pg_sa_engine
+    ), "Ensures pg db up, responsive, init (w/ tables) and/or migrated"
+
+    _apg_engine = make_asyncpg_engine(is_pdb_enabled)
+
+    yield _apg_engine
+
+    await _apg_engine.dispose()
+
+
 #
 # FACTORY FIXTURES
 #
@@ -240,7 +298,7 @@ async def _creator(conn, group: RowProxy | None = None, **overrides) -> RowProxy
 
 @pytest.fixture
 async def create_fake_cluster(
-    pg_engine: Engine, faker: Faker
+    aiopg_engine: Engine, faker: Faker
 ) -> AsyncIterator[Callable[..., Awaitable[int]]]:
     cluster_ids = []
     assert cluster_to_groups is not None
@@ -254,7 +312,7 @@ async def _creator(**overrides) -> int:
             "authentication": faker.pydict(value_types=[str]),
         }
         insert_values.update(overrides)
-        async with pg_engine.acquire() as conn:
+        async with aiopg_engine.acquire() as conn:
             cluster_id = await conn.scalar(
                 clusters.insert().values(**insert_values).returning(clusters.c.id)
             )
@@ -265,13 +323,13 @@ async def _creator(**overrides) -> int:
     yield _creator
 
     # cleanup
-    async with pg_engine.acquire() as conn:
+    async with aiopg_engine.acquire() as conn:
         await conn.execute(clusters.delete().where(clusters.c.id.in_(cluster_ids)))
 
 
 @pytest.fixture
 async def create_fake_project(
-    pg_engine: Engine,
+    aiopg_engine: Engine,
 ) -> AsyncIterator[Callable[..., Awaitable[RowProxy]]]:
     created_project_uuids = []
 
@@ -288,7 +346,7 @@ async def _creator(conn, user: RowProxy, **overrides) -> RowProxy:
 
     yield _creator
 
-    async with pg_engine.acquire() as conn:
+    async with aiopg_engine.acquire() as conn:
         await conn.execute(
             projects.delete().where(projects.c.uuid.in_(created_project_uuids))
         )

packages/postgres-database/tests/products/test_models_products.py

@@ -26,14 +26,14 @@
 
 
 async def test_load_products(
-    pg_engine: Engine, make_products_table: Callable, products_regex: dict
+    aiopg_engine: Engine, make_products_table: Callable, products_regex: dict
 ):
     exclude = {
         products.c.created,
         products.c.modified,
     }
 
-    async with pg_engine.acquire() as conn:
+    async with aiopg_engine.acquire() as conn:
         await make_products_table(conn)
 
         stmt = sa.select(*[c for c in products.columns if c not in exclude])
@@ -49,14 +49,14 @@ async def test_load_products(
 
 
 async def test_jinja2_templates_table(
-    pg_engine: Engine, osparc_simcore_services_dir: Path
+    aiopg_engine: Engine, osparc_simcore_services_dir: Path
 ):
     templates_common_dir = (
         osparc_simcore_services_dir
         / "web/server/src/simcore_service_webserver/templates/common"
     )
 
-    async with pg_engine.acquire() as conn:
+    async with aiopg_engine.acquire() as conn:
         templates = []
         # templates table
         for p in templates_common_dir.glob("*.jinja2"):
@@ -135,7 +135,7 @@ async def test_jinja2_templates_table(
 
 
 async def test_insert_select_product(
-    pg_engine: Engine,
+    aiopg_engine: Engine,
 ):
     osparc_product = {
         "name": "osparc",
@@ -174,7 +174,7 @@ async def test_insert_select_product(
 
     print(json.dumps(osparc_product))
 
-    async with pg_engine.acquire() as conn:
+    async with aiopg_engine.acquire() as conn:
         # writes
         stmt = (
             pg_insert(products)

packages/postgres-database/tests/products/test_utils_products.py

@@ -19,24 +19,24 @@
 )
 
 
-async def test_default_product(pg_engine: Engine, make_products_table: Callable):
-    async with pg_engine.acquire() as conn:
+async def test_default_product(aiopg_engine: Engine, make_products_table: Callable):
+    async with aiopg_engine.acquire() as conn:
         await make_products_table(conn)
         default_product = await get_default_product_name(conn)
         assert default_product == "s4l"
 
 
 @pytest.mark.parametrize("pg_sa_engine", ["sqlModels"], indirect=True)
-async def test_default_product_undefined(pg_engine: Engine):
-    async with pg_engine.acquire() as conn:
+async def test_default_product_undefined(aiopg_engine: Engine):
+    async with aiopg_engine.acquire() as conn:
         with pytest.raises(ValueError):
             await get_default_product_name(conn)
 
 
 async def test_get_or_create_group_product(
-    pg_engine: Engine, make_products_table: Callable
+    aiopg_engine: Engine, make_products_table: Callable
 ):
-    async with pg_engine.acquire() as conn:
+    async with aiopg_engine.acquire() as conn:
         await make_products_table(conn)
 
         async for product_row in await conn.execute(
@@ -105,13 +105,13 @@ async def test_get_or_create_group_product(
     reason="Not relevant. Will review in https://github.com/ITISFoundation/osparc-simcore/issues/3754"
 )
 async def test_get_or_create_group_product_concurrent(
-    pg_engine: Engine, make_products_table: Callable
+    aiopg_engine: Engine, make_products_table: Callable
 ):
-    async with pg_engine.acquire() as conn:
+    async with aiopg_engine.acquire() as conn:
         await make_products_table(conn)
 
     async def _auto_create_products_groups():
-        async with pg_engine.acquire() as conn:
+        async with aiopg_engine.acquire() as conn:
             async for product_row in await conn.execute(
                 sa.select(products.c.name, products.c.group_id).order_by(
                     products.c.priority

packages/postgres-database/tests/projects/conftest.py

@@ -16,10 +16,10 @@
 
 
 @pytest.fixture
-async def user(pg_engine: Engine) -> RowProxy:
+async def user(aiopg_engine: Engine) -> RowProxy:
     _USERNAME = f"{__name__}.me"
     # some user
-    async with pg_engine.acquire() as conn:
+    async with aiopg_engine.acquire() as conn:
         result: ResultProxy | None = await conn.execute(
             users.insert().values(**random_user(name=_USERNAME)).returning(users)
         )
@@ -32,10 +32,10 @@ async def user(pg_engine: Engine) -> RowProxy:
 
 
 @pytest.fixture
-async def project(pg_engine: Engine, user: RowProxy) -> RowProxy:
+async def project(aiopg_engine: Engine, user: RowProxy) -> RowProxy:
     _PARENT_PROJECT_NAME = f"{__name__}.parent"
     # a user's project
-    async with pg_engine.acquire() as conn:
+    async with aiopg_engine.acquire() as conn:
         result: ResultProxy | None = await conn.execute(
             projects.insert()
             .values(**random_project(prj_owner=user.id, name=_PARENT_PROJECT_NAME))
@@ -50,6 +50,6 @@ async def project(pg_engine: Engine, user: RowProxy) -> RowProxy:
 
 
 @pytest.fixture
-async def conn(pg_engine: Engine) -> AsyncIterable[SAConnection]:
-    async with pg_engine.acquire() as conn:
+async def conn(aiopg_engine: Engine) -> AsyncIterable[SAConnection]:
+    async with aiopg_engine.acquire() as conn:
         yield conn

packages/postgres-database/tests/test_classifiers.py

@@ -38,10 +38,10 @@ def classifiers_bundle(web_client_resource_folder: Path) -> dict:
 
 
 async def test_operations_on_group_classifiers(
-    pg_engine: Engine, classifiers_bundle: dict
+    aiopg_engine: Engine, classifiers_bundle: dict
 ):
     # NOTE: mostly for TDD
-    async with pg_engine.acquire() as conn:
+    async with aiopg_engine.acquire() as conn:
         # creates a group
         stmt = (
             groups.insert()