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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__
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