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import logging
from django.apps import AppConfig
from .conf import settings
from .db import patch_db
from .templates import patch_template
from aws_xray_sdk.core import xray_recorder
from aws_xray_sdk.core.exceptions.exceptions import SegmentNameMissingException
log = logging.getLogger(__name__)
class XRayConfig(AppConfig):
name = 'aws_xray_sdk.ext.django'
def ready(self):
"""
Configure global XRay recorder based on django settings
under XRAY_RECORDER namespace.
This method could be called twice during server startup
because of base command and reload command.
So this function must be idempotent
"""
if not settings.AWS_XRAY_TRACING_NAME:
raise SegmentNameMissingException('Segment name is required.')
xray_recorder.configure(
daemon_address=settings.AWS_XRAY_DAEMON_ADDRESS,
sampling=settings.SAMPLING,
sampling_rules=settings.SAMPLING_RULES,
context_missing=settings.AWS_XRAY_CONTEXT_MISSING,
plugins=settings.PLUGINS,
service=settings.AWS_XRAY_TRACING_NAME,
dynamic_naming=settings.DYNAMIC_NAMING,
)
# if turned on subsegment will be generated on
# built-in database and template rendering
if settings.AUTO_INSTRUMENT:
try:
patch_db()
except Exception:
log.debug('failed to patch Django built-in database')
try:
patch_template()
except Exception:
log.debug('failed to patch Django built-in template engine')
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