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Propagate opentracing contexts through EDUs (#5852)

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Propagate opentracing contexts through EDUs
Co-Authored-By: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
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Jorik Schellekens 2019-08-22 18:21:10 +01:00 • committed by GitHub
parent 0b39fa53b6
commit 8767b63a82
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9 changed files with 234 additions and 94 deletions
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26
synapse/logging/opentracing.py
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@ -149,6 +149,9 @@ unchartered waters will require the enforcement of the whitelist.
``logging/opentracing.py`` has a ``whitelisted_homeserver`` method which takes
in a destination and compares it to the whitelist.
Most injection methods take a 'destination' arg. The context will only be injected
if the destination matches the whitelist or the destination is None.
=======
Gotchas
=======
@ -576,6 +579,29 @@ def inject_active_span_text_map(carrier, destination, check_destination=True):
)
def get_active_span_text_map(destination=None):
"""
Gets a span context as a dict. This can be used instead of manually
injecting a span into an empty carrier.
Args:
destination (str): the name of the remote server.
Returns:
dict: the active span's context if opentracing is enabled, otherwise empty.
"""
if not opentracing or (destination and not whitelisted_homeserver(destination)):
return {}
carrier = {}
opentracing.tracer.inject(
opentracing.tracer.active_span, opentracing.Format.TEXT_MAP, carrier
)
return carrier
def active_span_context_as_string():
"""
Returns: