feat: add tracer_provider arg

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 ---
 
-## [1.2.0] - 2024-04-29
+## [1.2.1] - 2024-04-29
 
 ### Added:
 

cachext/backends.py

@@ -2,6 +2,7 @@
 import pickle
 import time
 from threading import RLock, Lock
+from .otel import otel_instrument
 
 
 class BaseBackend(metaclass=abc.ABCMeta):
@@ -68,8 +69,8 @@ class Redis(BaseBackend):
 
     def __init__(self, prefix=None, default_ttl=600, **kwargs):
         import redis
-        from opentelemetry.instrumentation.redis import RedisInstrumentor
-        RedisInstrumentor().instrument()
+
+        otel_instrument()
         self._client = redis.StrictRedis(**kwargs)
         self.prefix = prefix
         self.default_ttl = default_ttl

cachext/exts.py

@@ -1,5 +1,6 @@
 from . import backends
 from .cache import cached
+from .otel import otel_instrument
 
 
 CACHE_LABELS = ("prefix_name", "func_name")
@@ -47,8 +48,8 @@ def __init__(self, ns='REDIS_'):
 
     def init_app(self, app):
         import redis
-        from opentelemetry.instrumentation.redis import RedisInstrumentor
-        RedisInstrumentor().instrument()
+
+        otel_instrument(app)
         opts = app.config.get_namespace(self.ns)
         self._pool = redis.ConnectionPool(**opts)
         self._client = redis.StrictRedis(connection_pool=self._pool)

cachext/otel.py

@@ -0,0 +1,18 @@
+import opentelemetry.trace as trace
+from opentelemetry.instrumentation.redis import RedisInstrumentor
+
+
+def sync_once(func):
+    def wrapper(*args, **kwargs):
+        if not wrapper._done:
+            wrapper._done = True
+            return func(*args, **kwargs)
+
+    wrapper._done = False
+    return wrapper
+
+
+@sync_once
+def otel_instrument(app=None):
+    if app is None or app.config.get_namespace("OTEL_").get("enable", False):
+        RedisInstrumentor().instrument(tracer_provider=trace.get_tracer_provider())