[Python] Bump Granian to 2.6, update Emmett55 implementation (#10358)

* [Python] Update Granian to 2.6

* [Python] Review `emmett55` implementation

Author: gi0baro

frameworks/Python/emmett55/app.py

@@ -3,12 +3,19 @@
 from random import randint, sample
 
 import asyncpg
-from emmett55 import App, Pipe, current, request, response
+from emmett55 import App, Pipe, request, response
 from emmett55.extensions import Extension, Signals, listen_signal
-from emmett55.tools import service
+from emmett55.tools import ServicePipe
 from renoir import Renoir
 
 
+class NoResetConnection(asyncpg.Connection):
+    __slots__ = ()
+
+    def get_reset_query(self):
+        return ""
+
+
 class AsyncPG(Extension):
     __slots__ = ["pool"]
 
@@ -23,10 +30,9 @@ async def build_pool(self):
             database='hello_world',
             host='tfb-database',
             port=5432,
-            min_size=16,
-            max_size=16,
-            max_queries=64_000_000_000,
-            max_inactive_connection_lifetime=0
+            min_size=4,
+            max_size=4,
+            connection_class=NoResetConnection,
         )
 
     @listen_signal(Signals.after_loop)
@@ -40,18 +46,32 @@ class AsyncPGPipe(Pipe):
     def __init__(self, ext):
         self.ext = ext
 
-    async def open(self):
-        conn = current._db_conn = self.ext.pool.acquire()
-        current.db = await conn.__aenter__()
+    async def pipe(self, next_pipe, **kwargs):
+        async with self.ext.pool.acquire() as conn:
+            kwargs['db'] = conn
+            return await next_pipe(**kwargs)
+
 
-    async def close(self):
-        await current._db_conn.__aexit__()
+class TemplatePipe(Pipe):
+    __slots__ = ["template"]
+    output = "str"
+
+    def __init__(self, template):
+        self.template = f"templates/{template}"
+
+    async def pipe(self, next_pipe, **kwargs):
+        response.content_type = "text/html; charset=utf-8"
+        ctx = await next_pipe(**kwargs)
+        return templates.render(self.template, ctx)
 
 
 app = App(__name__)
 app.config.handle_static = False
 templates = Renoir()
 
+json_routes = app.module(__name__, 'json')
+json_routes.pipeline = [ServicePipe('json')]
+
 db_ext = app.use_extension(AsyncPG)
 
 SQL_SELECT = 'SELECT "randomnumber", "id" FROM "world" WHERE id = $1'
@@ -60,17 +80,15 @@ async def close(self):
 sort_key = itemgetter(1)
 
 
-@app.route()
-@service.json
+@json_routes.route()
 async def json():
     return {'message': 'Hello, World!'}
 
 
-@app.route("/db", pipeline=[db_ext.pipe])
-@service.json
-async def get_random_world():
+@json_routes.route("/db", pipeline=[db_ext.pipe])
+async def get_random_world(db):
     row_id = randint(1, 10000)
-    number = await current.db.fetchval(SQL_SELECT, row_id)
+    number = await db.fetchval(SQL_SELECT, row_id)
     return {'id': row_id, 'randomNumber': number}
 
 
@@ -86,41 +104,32 @@ def get_qparam():
     return rv
 
 
-@app.route("/queries", pipeline=[db_ext.pipe])
-@service.json
-async def get_random_worlds():
+@json_routes.route("/queries", pipeline=[db_ext.pipe])
+async def get_random_worlds(db):
     num_queries = get_qparam()
     row_ids = sample(range(1, 10000), num_queries)
-    worlds = []
-    statement = await current.db.prepare(SQL_SELECT)
-    for row_id in row_ids:
-        number = await statement.fetchval(row_id)
-        worlds.append({'id': row_id, 'randomNumber': number})
-    return worlds
+    rows = await db.fetchmany(SQL_SELECT, [(v,) for v in row_ids])
+    return [{'id': row_id, 'randomNumber': number[0]} for row_id, number in zip(row_ids, rows)]
 
 
-@app.route(pipeline=[db_ext.pipe], output='str')
-async def fortunes():
-    response.content_type = "text/html; charset=utf-8"
-    fortunes = await current.db.fetch('SELECT * FROM Fortune')
+@app.route(pipeline=[TemplatePipe("fortunes.html"), db_ext.pipe])
+async def fortunes(db):
+    fortunes = await db.fetch('SELECT * FROM Fortune')
     fortunes.append(ROW_ADD)
     fortunes.sort(key=sort_key)
-    return templates.render("templates/fortunes.html", {"fortunes": fortunes})
+    return {"fortunes": fortunes}
 
 
-@app.route(pipeline=[db_ext.pipe])
-@service.json
-async def updates():
+@json_routes.route(pipeline=[db_ext.pipe])
+async def updates(db):
     num_queries = get_qparam()
     updates = list(zip(
         sample(range(1, 10000), num_queries),
         sorted(sample(range(1, 10000), num_queries))
     ))
     worlds = [{'id': row_id, 'randomNumber': number} for row_id, number in updates]
-    statement = await current.db.prepare(SQL_SELECT)
-    for row_id, _ in updates:
-        await statement.fetchval(row_id)
-    await current.db.executemany(SQL_UPDATE, updates)
+    await db.executemany(SQL_SELECT, [(i[0],) for i in updates])
+    await db.executemany(SQL_UPDATE, updates)
     return worlds
 
 

frameworks/Python/emmett55/emmett55.dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.11-slim
+FROM python:3.13-slim
 
 ADD ./ /emmett55
 

frameworks/Python/emmett55/requirements.txt

@@ -1,3 +1,3 @@
-asyncpg==0.29.0
+asyncpg==0.30.0
 emmett55[orjson,uvloop]>=1.2.0,<1.3.0
 renoir==1.8.0

frameworks/Python/granian/app_asgi.py

@@ -106,7 +106,6 @@ async def route_db(scope, receive, send):
 async def route_queries(scope, receive, send):
     num_queries = get_num_queries(scope)
     row_ids = sample(range(1, 10000), num_queries)
-    worlds = []
 
     async with pool.acquire() as connection:
         rows = await connection.fetchmany(SQL_SELECT, [(v,) for v in row_ids])

frameworks/Python/granian/granian-nogil.dockerfile

@@ -13,4 +13,4 @@ RUN uv pip install -r requirements-nogil.txt
 
 EXPOSE 8080
 
-CMD uv run python run_nogil.py rsgi st
+CMD uv run python run_nogil.py rsgi mt

frameworks/Python/granian/granian-rsgi.dockerfile

@@ -8,4 +8,4 @@ RUN pip install -r /granian/requirements.txt
 
 EXPOSE 8080
 
-CMD python run.py rsgi st
+CMD python run.py rsgi mt

frameworks/Python/granian/requirements-nogil.txt

@@ -1 +1 @@
-granian[rloop]>=2.5.0,<2.6.0
+granian[rloop]>=2.6.0,<2.7.0

frameworks/Python/granian/requirements.txt

@@ -1,4 +1,4 @@
 asyncpg==0.30.0
-granian[uvloop]>=2.5.0,<2.6.0
+granian[uvloop]>=2.6.0,<2.7.0
 jinja2==3.1.6
 orjson==3.11.3