hm

venv/lib/python3.12/site-packages/eventlet/zipkin/greenthread.py

@@ -0,0 +1,33 @@
+from eventlet import greenthread
+
+from eventlet.zipkin import api
+
+
+__original_init__ = greenthread.GreenThread.__init__
+__original_main__ = greenthread.GreenThread.main
+
+
+def _patched__init(self, parent):
+    # parent thread saves current TraceData from tls to self
+    if api.is_tracing():
+        self.trace_data = api.get_trace_data()
+
+    __original_init__(self, parent)
+
+
+def _patched_main(self, function, args, kwargs):
+    # child thread inherits TraceData
+    if hasattr(self, 'trace_data'):
+        api.set_trace_data(self.trace_data)
+
+    __original_main__(self, function, args, kwargs)
+
+
+def patch():
+    greenthread.GreenThread.__init__ = _patched__init
+    greenthread.GreenThread.main = _patched_main
+
+
+def unpatch():
+    greenthread.GreenThread.__init__ = __original_init__
+    greenthread.GreenThread.main = __original_main__