Update pymemcache instrumentation to support pymemcache version > 1.3.x

Author: rjduffner

CHANGELOG.md

@@ -54,6 +54,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `opentelemetry-instrumentation-kafka-python` Fix topic extraction
   ([#949](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/949))
 
+### Changed
+
+- `opentelemetry-instrumentation-pymemcache` should run against newer versions of pymemcache.
+  ([#935](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/935))
+
 ## [1.9.1-0.28b1](https://github.com/open-telemetry/opentelemetry-python/releases/tag/v1.9.1-0.28b1) - 2022-01-29
 
 ### Fixed

instrumentation/README.md

@@ -23,7 +23,7 @@
 | [opentelemetry-instrumentation-mysql](./opentelemetry-instrumentation-mysql) | mysql-connector-python ~= 8.0 |
 | [opentelemetry-instrumentation-pika](./opentelemetry-instrumentation-pika) | pika >= 0.12.0 |
 | [opentelemetry-instrumentation-psycopg2](./opentelemetry-instrumentation-psycopg2) | psycopg2 >= 2.7.3.1 |
-| [opentelemetry-instrumentation-pymemcache](./opentelemetry-instrumentation-pymemcache) | pymemcache ~= 1.3 |
+| [opentelemetry-instrumentation-pymemcache](./opentelemetry-instrumentation-pymemcache) | pymemcache > 2, < 4 |
 | [opentelemetry-instrumentation-pymongo](./opentelemetry-instrumentation-pymongo) | pymongo >= 3.1, < 5.0 |
 | [opentelemetry-instrumentation-pymysql](./opentelemetry-instrumentation-pymysql) | PyMySQL < 2 |
 | [opentelemetry-instrumentation-pyramid](./opentelemetry-instrumentation-pyramid) | pyramid >= 1.7 |

instrumentation/opentelemetry-instrumentation-pymemcache/src/opentelemetry/instrumentation/pymemcache/package.py

@@ -13,4 +13,4 @@
 # limitations under the License.
 
 
-_instruments = ("pymemcache ~= 1.3",)
+_instruments = ("pymemcache > 2, < 4",)

instrumentation/opentelemetry-instrumentation-pymemcache/tests/test_pymemcache.py

@@ -126,11 +126,11 @@ def test_set_multi_success(self):
         client = self.make_client([b"STORED\r\n"])
         # Alias for set_many, a convienance function that calls set for every key
         result = client.set_multi({b"key": b"value"}, noreply=False)
-        self.assertTrue(result)
+        assert len(result) == 0
 
         spans = self.memory_exporter.get_finished_spans()
 
-        self.check_spans(spans, 2, ["set key", "set_multi key"])
+        self.check_spans(spans, 1, ["set_multi key"])
 
     def test_delete_not_found(self):
         client = self.make_client([b"NOT_FOUND\r\n"])
@@ -191,19 +191,17 @@ def test_delete_many_found(self):
 
         spans = self.memory_exporter.get_finished_spans()
 
-        self.check_spans(
-            spans, 3, ["add key", "delete key", "delete_many key"]
-        )
+        self.check_spans(spans, 2, ["add key", "delete_many key"])
 
     def test_set_many_success(self):
         client = self.make_client([b"STORED\r\n"])
         # a convienance function that calls set for every key
         result = client.set_many({b"key": b"value"}, noreply=False)
-        self.assertTrue(result)
+        assert len(result) == 0
 
         spans = self.memory_exporter.get_finished_spans()
 
-        self.check_spans(spans, 2, ["set key", "set_many key"])
+        self.check_spans(spans, 1, ["set_many key"])
 
     def test_set_get(self):
         client = self.make_client(
@@ -243,7 +241,7 @@ def test_prepend_stored(self):
 
     def test_cas_stored(self):
         client = self.make_client([b"STORED\r\n"])
-        result = client.cas(b"key", b"value", b"cas", noreply=False)
+        result = client.cas(b"key", b"value", 1, noreply=False)
         self.assertTrue(result)
 
         spans = self.memory_exporter.get_finished_spans()
@@ -252,7 +250,7 @@ def test_cas_stored(self):
 
     def test_cas_exists(self):
         client = self.make_client([b"EXISTS\r\n"])
-        result = client.cas(b"key", b"value", b"cas", noreply=False)
+        result = client.cas(b"key", b"value", 1, noreply=False)
         assert result is False
 
         spans = self.memory_exporter.get_finished_spans()
@@ -261,7 +259,7 @@ def test_cas_exists(self):
 
     def test_cas_not_found(self):
         client = self.make_client([b"NOT_FOUND\r\n"])
-        result = client.cas(b"key", b"value", b"cas", noreply=False)
+        result = client.cas(b"key", b"value", 1, noreply=False)
         assert result is None
 
         spans = self.memory_exporter.get_finished_spans()
@@ -445,7 +443,7 @@ def test_version_success(self):
     def test_stats(self):
         client = self.make_client([b"STAT fake_stats 1\r\n", b"END\r\n"])
         result = client.stats()
-        assert client.sock.send_bufs == [b"stats \r\n"]
+        assert client.sock.send_bufs == [b"stats\r\n"]
         assert result == {b"fake_stats": 1}
 
         spans = self.memory_exporter.get_finished_spans()

opentelemetry-instrumentation/src/opentelemetry/instrumentation/bootstrap_gen.py

@@ -93,7 +93,7 @@
         "instrumentation": "opentelemetry-instrumentation-psycopg2==0.29b0",
     },
     "pymemcache": {
-        "library": "pymemcache ~= 1.3",
+        "library": "pymemcache > 2, < 4",
         "instrumentation": "opentelemetry-instrumentation-pymemcache==0.29b0",
     },
     "pymongo": {