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pylibmc.py
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pylibmc.py
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# BSD 3-Clause License
#
# Copyright (c) 2019, Elasticsearch BV
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# * Neither the name of the copyright holder nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
from elasticapm.instrumentation.packages.base import AbstractInstrumentedModule
from elasticapm.traces import capture_span
try:
from functools import lru_cache
except ImportError:
from cachetools.func import lru_cache
class PyLibMcInstrumentation(AbstractInstrumentedModule):
name = "pylibmc"
instrument_list = [
("pylibmc", "Client.get"),
("pylibmc", "Client.get_multi"),
("pylibmc", "Client.set"),
("pylibmc", "Client.set_multi"),
("pylibmc", "Client.add"),
("pylibmc", "Client.replace"),
("pylibmc", "Client.append"),
("pylibmc", "Client.prepend"),
("pylibmc", "Client.incr"),
("pylibmc", "Client.decr"),
("pylibmc", "Client.gets"),
("pylibmc", "Client.cas"),
("pylibmc", "Client.delete"),
("pylibmc", "Client.delete_multi"),
("pylibmc", "Client.touch"),
("pylibmc", "Client.get_stats"),
]
def call(self, module, method, wrapped, instance, args, kwargs):
wrapped_name = self.get_wrapped_name(wrapped, instance, method)
address, port = get_address_port_from_instance(instance)
destination = {
"address": address,
"port": port,
}
with capture_span(
wrapped_name,
span_type="cache",
span_subtype="memcached",
span_action="query",
extra={"destination": destination},
leaf=True,
):
return wrapped(*args, **kwargs)
@lru_cache(10)
def get_address_port_from_instance(instance):
address, port = None, None
if instance.addresses:
first_address = instance.addresses[0]
if ":" in first_address:
address, port = first_address.split(":", 1)
try:
port = int(port)
except ValueError:
port = None
return address, port