PYTHON-1714 Add c extension use to client metadata

pymongo/__init__.py

@@ -88,7 +88,7 @@
 
 from pymongo import _csot
 from pymongo._version import __version__, get_version_string, version_tuple
-from pymongo.common import MAX_SUPPORTED_WIRE_VERSION, MIN_SUPPORTED_WIRE_VERSION
+from pymongo.common import MAX_SUPPORTED_WIRE_VERSION, MIN_SUPPORTED_WIRE_VERSION, has_c
 from pymongo.cursor import CursorType
 from pymongo.operations import (
     DeleteMany,
@@ -116,16 +116,6 @@
 """Current version of PyMongo."""
 
 
-def has_c() -> bool:
-    """Is the C extension installed?"""
-    try:
-        from pymongo import _cmessage  # type: ignore[attr-defined] # noqa: F401
-
-        return True
-    except ImportError:
-        return False
-
-
 def timeout(seconds: Optional[float]) -> ContextManager[None]:
     """**(Provisional)** Apply the given timeout for a block of operations.
 

pymongo/common.py

@@ -1060,3 +1060,13 @@ def update(self, other: Mapping[str, Any]) -> None:  # type: ignore[override]
 
     def cased_key(self, key: str) -> Any:
         return self.__casedkeys[key.lower()]
+
+
+def has_c() -> bool:
+    """Is the C extension installed?"""
+    try:
+        from pymongo import _cmessage  # type: ignore[attr-defined] # noqa: F401
+
+        return True
+    except ImportError:
+        return False

pymongo/pool_options.py

@@ -33,6 +33,7 @@
     MAX_POOL_SIZE,
     MIN_POOL_SIZE,
     WAIT_QUEUE_TIMEOUT,
+    has_c,
 )
 
 if TYPE_CHECKING:
@@ -363,6 +364,11 @@ def __init__(
         #    },
         #    'platform': 'CPython 3.8.0|MyPlatform'
         # }
+        if has_c:
+            self.__metadata["driver"]["name"] = "{}|{}".format(
+                self.__metadata["driver"]["name"],
+                "c",
+            )
         if not is_sync:
             self.__metadata["driver"]["name"] = "{}|{}".format(
                 self.__metadata["driver"]["name"],

test/asynchronous/test_client.py

@@ -95,7 +95,7 @@
 from pymongo.asynchronous.settings import TOPOLOGY_TYPE
 from pymongo.asynchronous.topology import _ErrorContext
 from pymongo.client_options import ClientOptions
-from pymongo.common import _UUID_REPRESENTATIONS, CONNECT_TIMEOUT
+from pymongo.common import _UUID_REPRESENTATIONS, CONNECT_TIMEOUT, has_c
 from pymongo.compression_support import _have_snappy, _have_zstd
 from pymongo.driver_info import DriverInfo
 from pymongo.errors import (
@@ -343,7 +343,10 @@ async def test_read_preference(self):
 
     async def test_metadata(self):
         metadata = copy.deepcopy(_METADATA)
-        metadata["driver"]["name"] = "PyMongo|async"
+        if has_c:
+            metadata["driver"]["name"] = "PyMongo|c|async"
+        else:
+            metadata["driver"]["name"] = "PyMongo|async"
         metadata["application"] = {"name": "foobar"}
         client = self.simple_client("mongodb://foo:27017/?appname=foobar&connect=false")
         options = client.options
@@ -1927,7 +1930,10 @@ def test_sigstop_sigcont(self):
     async def _test_handshake(self, env_vars, expected_env):
         with patch.dict("os.environ", env_vars):
             metadata = copy.deepcopy(_METADATA)
-            metadata["driver"]["name"] = "PyMongo|async"
+            if has_c:
+                metadata["driver"]["name"] = "PyMongo|c|async"
+            else:
+                metadata["driver"]["name"] = "PyMongo|async"
             if expected_env is not None:
                 metadata["env"] = expected_env
 

test/test_client.py

@@ -83,7 +83,7 @@
 from bson.tz_util import utc
 from pymongo import event_loggers, message, monitoring
 from pymongo.client_options import ClientOptions
-from pymongo.common import _UUID_REPRESENTATIONS, CONNECT_TIMEOUT
+from pymongo.common import _UUID_REPRESENTATIONS, CONNECT_TIMEOUT, has_c
 from pymongo.compression_support import _have_snappy, _have_zstd
 from pymongo.driver_info import DriverInfo
 from pymongo.errors import (
@@ -335,7 +335,10 @@ def test_read_preference(self):
 
     def test_metadata(self):
         metadata = copy.deepcopy(_METADATA)
-        metadata["driver"]["name"] = "PyMongo"
+        if has_c:
+            metadata["driver"]["name"] = "PyMongo|c"
+        else:
+            metadata["driver"]["name"] = "PyMongo"
         metadata["application"] = {"name": "foobar"}
         client = self.simple_client("mongodb://foo:27017/?appname=foobar&connect=false")
         options = client.options
@@ -1885,7 +1888,10 @@ def test_sigstop_sigcont(self):
     def _test_handshake(self, env_vars, expected_env):
         with patch.dict("os.environ", env_vars):
             metadata = copy.deepcopy(_METADATA)
-            metadata["driver"]["name"] = "PyMongo"
+            if has_c:
+                metadata["driver"]["name"] = "PyMongo|c"
+            else:
+                metadata["driver"]["name"] = "PyMongo"
             if expected_env is not None:
                 metadata["env"] = expected_env