Source code for opentelemetry.sdk.trace

# Copyright The OpenTelemetry Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# pylint: disable=too-many-lines
import abc
import atexit
import concurrent.futures
import json
import logging
import threading
import traceback
from collections import OrderedDict
from contextlib import contextmanager
from os import environ
from types import MappingProxyType, TracebackType
from typing import (
    Any,
    Callable,
    Dict,
    Iterator,
    Optional,
    Sequence,
    Tuple,
    Type,
    Union,
)

from opentelemetry import context as context_api
from opentelemetry import trace as trace_api
from opentelemetry.attributes import BoundedAttributes
from opentelemetry.sdk import util
from opentelemetry.sdk.environment_variables import (
    OTEL_ATTRIBUTE_VALUE_LENGTH_LIMIT,
    OTEL_EVENT_ATTRIBUTE_COUNT_LIMIT,
    OTEL_LINK_ATTRIBUTE_COUNT_LIMIT,
    OTEL_SPAN_ATTRIBUTE_COUNT_LIMIT,
    OTEL_SPAN_ATTRIBUTE_VALUE_LENGTH_LIMIT,
    OTEL_SPAN_EVENT_COUNT_LIMIT,
    OTEL_SPAN_LINK_COUNT_LIMIT,
)
from opentelemetry.sdk.resources import Resource
from opentelemetry.sdk.trace import sampling
from opentelemetry.sdk.trace.id_generator import IdGenerator, RandomIdGenerator
from opentelemetry.sdk.util import BoundedList
from opentelemetry.sdk.util.instrumentation import InstrumentationInfo
from opentelemetry.trace import SpanContext
from opentelemetry.trace.status import Status, StatusCode
from opentelemetry.util import types
from opentelemetry.util._time import _time_ns

logger = logging.getLogger(__name__)

_DEFAULT_OTEL_SPAN_ATTRIBUTE_COUNT_LIMIT = 128
_DEFAULT_OTEL_SPAN_EVENT_COUNT_LIMIT = 128
_DEFAULT_OTEL_SPAN_LINK_COUNT_LIMIT = 128
_DEFAULT_OTEL_EVENT_ATTRIBUTE_COUNT_LIMIT = 128
_DEFAULT_OTEL_LINK_ATTRIBUTE_COUNT_LIMIT = 128


_ENV_VALUE_UNSET = ""

# pylint: disable=protected-access
_TRACE_SAMPLER = sampling._get_from_env_or_default()


[docs]class SpanProcessor: """Interface which allows hooks for SDK's `Span` start and end method invocations. Span processors can be registered directly using :func:`TracerProvider.add_span_processor` and they are invoked in the same order as they were registered. """
[docs] def on_start( self, span: "Span", parent_context: Optional[context_api.Context] = None, ) -> None: """Called when a :class:`opentelemetry.trace.Span` is started. This method is called synchronously on the thread that starts the span, therefore it should not block or throw an exception. Args: span: The :class:`opentelemetry.trace.Span` that just started. parent_context: The parent context of the span that just started. """
[docs] def on_end(self, span: "ReadableSpan") -> None: """Called when a :class:`opentelemetry.trace.Span` is ended. This method is called synchronously on the thread that ends the span, therefore it should not block or throw an exception. Args: span: The :class:`opentelemetry.trace.Span` that just ended. """
[docs] def shutdown(self) -> None: """Called when a :class:`opentelemetry.sdk.trace.Tracer` is shutdown."""
[docs] def force_flush(self, timeout_millis: int = 30000) -> bool: """Export all ended spans to the configured Exporter that have not yet been exported. Args: timeout_millis: The maximum amount of time to wait for spans to be exported. Returns: False if the timeout is exceeded, True otherwise. """
# Temporary fix until https://github.com/PyCQA/pylint/issues/4098 is resolved # pylint:disable=no-member
[docs]class SynchronousMultiSpanProcessor(SpanProcessor): """Implementation of class:`SpanProcessor` that forwards all received events to a list of span processors sequentially. The underlying span processors are called in sequential order as they were added. """ def __init__(self): # use a tuple to avoid race conditions when adding a new span and # iterating through it on "on_start" and "on_end". self._span_processors = () # type: Tuple[SpanProcessor, ...] self._lock = threading.Lock()
[docs] def add_span_processor(self, span_processor: SpanProcessor) -> None: """Adds a SpanProcessor to the list handled by this instance.""" with self._lock: self._span_processors = self._span_processors + (span_processor,)
[docs] def on_start( self, span: "Span", parent_context: Optional[context_api.Context] = None, ) -> None: for sp in self._span_processors: sp.on_start(span, parent_context=parent_context)
[docs] def on_end(self, span: "ReadableSpan") -> None: for sp in self._span_processors: sp.on_end(span)
[docs] def shutdown(self) -> None: """Sequentially shuts down all underlying span processors.""" for sp in self._span_processors: sp.shutdown()
[docs] def force_flush(self, timeout_millis: int = 30000) -> bool: """Sequentially calls force_flush on all underlying :class:`SpanProcessor` Args: timeout_millis: The maximum amount of time over all span processors to wait for spans to be exported. In case the first n span processors exceeded the timeout followup span processors will be skipped. Returns: True if all span processors flushed their spans within the given timeout, False otherwise. """ deadline_ns = _time_ns() + timeout_millis * 1000000 for sp in self._span_processors: current_time_ns = _time_ns() if current_time_ns >= deadline_ns: return False if not sp.force_flush((deadline_ns - current_time_ns) // 1000000): return False return True
[docs]class ConcurrentMultiSpanProcessor(SpanProcessor): """Implementation of :class:`SpanProcessor` that forwards all received events to a list of span processors in parallel. Calls to the underlying span processors are forwarded in parallel by submitting them to a thread pool executor and waiting until each span processor finished its work. Args: num_threads: The number of threads managed by the thread pool executor and thus defining how many span processors can work in parallel. """ def __init__(self, num_threads: int = 2): # use a tuple to avoid race conditions when adding a new span and # iterating through it on "on_start" and "on_end". self._span_processors = () # type: Tuple[SpanProcessor, ...] self._lock = threading.Lock() self._executor = concurrent.futures.ThreadPoolExecutor( max_workers=num_threads )
[docs] def add_span_processor(self, span_processor: SpanProcessor) -> None: """Adds a SpanProcessor to the list handled by this instance.""" with self._lock: self._span_processors = self._span_processors + (span_processor,)
def _submit_and_await( self, func: Callable[[SpanProcessor], Callable[..., None]], *args: Any, **kwargs: Any ): futures = [] for sp in self._span_processors: future = self._executor.submit(func(sp), *args, **kwargs) futures.append(future) for future in futures: future.result()
[docs] def on_start( self, span: "Span", parent_context: Optional[context_api.Context] = None, ) -> None: self._submit_and_await( lambda sp: sp.on_start, span, parent_context=parent_context )
[docs] def on_end(self, span: "ReadableSpan") -> None: self._submit_and_await(lambda sp: sp.on_end, span)
[docs] def shutdown(self) -> None: """Shuts down all underlying span processors in parallel.""" self._submit_and_await(lambda sp: sp.shutdown)
[docs] def force_flush(self, timeout_millis: int = 30000) -> bool: """Calls force_flush on all underlying span processors in parallel. Args: timeout_millis: The maximum amount of time to wait for spans to be exported. Returns: True if all span processors flushed their spans within the given timeout, False otherwise. """ futures = [] for sp in self._span_processors: # type: SpanProcessor future = self._executor.submit(sp.force_flush, timeout_millis) futures.append(future) timeout_sec = timeout_millis / 1e3 done_futures, not_done_futures = concurrent.futures.wait( futures, timeout_sec ) if not_done_futures: return False for future in done_futures: if not future.result(): return False return True
[docs]class EventBase(abc.ABC): def __init__(self, name: str, timestamp: Optional[int] = None) -> None: self._name = name if timestamp is None: self._timestamp = _time_ns() else: self._timestamp = timestamp @property def name(self) -> str: return self._name @property def timestamp(self) -> int: return self._timestamp @property @abc.abstractmethod def attributes(self) -> types.Attributes: pass
[docs]class Event(EventBase): """A text annotation with a set of attributes. The attributes of an event are immutable. Args: name: Name of the event. attributes: Attributes of the event. timestamp: Timestamp of the event. If `None` it will filled automatically. """ def __init__( self, name: str, attributes: types.Attributes = None, timestamp: Optional[int] = None, limit: Optional[int] = _DEFAULT_OTEL_SPAN_ATTRIBUTE_COUNT_LIMIT, ) -> None: super().__init__(name, timestamp) self._attributes = attributes @property def attributes(self) -> types.Attributes: return self._attributes
def _check_span_ended(func): def wrapper(self, *args, **kwargs): already_ended = False with self._lock: # pylint: disable=protected-access if self._end_time is None: func(self, *args, **kwargs) else: already_ended = True if already_ended: logger.warning("Tried calling %s on an ended span.", func.__name__) return wrapper
[docs]class ReadableSpan: """Provides read-only access to span attributes""" def __init__( self, name: str = None, context: trace_api.SpanContext = None, parent: Optional[trace_api.SpanContext] = None, resource: Resource = Resource.create({}), attributes: types.Attributes = None, events: Sequence[Event] = None, links: Sequence[trace_api.Link] = (), kind: trace_api.SpanKind = trace_api.SpanKind.INTERNAL, instrumentation_info: InstrumentationInfo = None, status: Status = Status(StatusCode.UNSET), start_time: Optional[int] = None, end_time: Optional[int] = None, ) -> None: self._name = name self._context = context self._kind = kind self._instrumentation_info = instrumentation_info self._parent = parent self._start_time = start_time self._end_time = end_time self._attributes = attributes self._events = events self._links = links self._resource = resource self._status = status @property def dropped_attributes(self) -> int: if self._attributes: return self._attributes.dropped return 0 @property def dropped_events(self) -> int: if self._events: return self._events.dropped return 0 @property def dropped_links(self) -> int: if self._links: return self._links.dropped return 0 @property def name(self) -> str: return self._name
[docs] def get_span_context(self): return self._context
@property def context(self): return self._context @property def kind(self) -> trace_api.SpanKind: return self._kind @property def parent(self) -> Optional[trace_api.SpanContext]: return self._parent @property def start_time(self) -> Optional[int]: return self._start_time @property def end_time(self) -> Optional[int]: return self._end_time @property def status(self) -> trace_api.Status: return self._status @property def attributes(self) -> types.Attributes: return MappingProxyType(self._attributes) @property def events(self) -> Sequence[Event]: return MappingProxyType(self._events) @property def links(self) -> Sequence[trace_api.Link]: return MappingProxyType(self._links) @property def resource(self) -> Resource: return self._resource @property def instrumentation_info(self) -> InstrumentationInfo: return self._instrumentation_info
[docs] def to_json(self, indent=4): parent_id = None if self.parent is not None: if isinstance(self.parent, Span): ctx = self.parent.context parent_id = "0x{}".format( trace_api.format_span_id(ctx.span_id) ) elif isinstance(self.parent, SpanContext): parent_id = "0x{}".format( trace_api.format_span_id(self.parent.span_id) ) start_time = None if self._start_time: start_time = util.ns_to_iso_str(self._start_time) end_time = None if self._end_time: end_time = util.ns_to_iso_str(self._end_time) if self._status is not None: status = OrderedDict() status["status_code"] = str(self._status.status_code.name) if self._status.description: status["description"] = self._status.description f_span = OrderedDict() f_span["name"] = self._name f_span["context"] = self._format_context(self._context) f_span["kind"] = str(self.kind) f_span["parent_id"] = parent_id f_span["start_time"] = start_time f_span["end_time"] = end_time if self._status is not None: f_span["status"] = status f_span["attributes"] = self._format_attributes(self._attributes) f_span["events"] = self._format_events(self._events) f_span["links"] = self._format_links(self._links) f_span["resource"] = self._format_attributes(self._resource.attributes) return json.dumps(f_span, indent=indent)
@staticmethod def _format_context(context): x_ctx = OrderedDict() x_ctx["trace_id"] = "0x{}".format( trace_api.format_trace_id(context.trace_id) ) x_ctx["span_id"] = "0x{}".format( trace_api.format_span_id(context.span_id) ) x_ctx["trace_state"] = repr(context.trace_state) return x_ctx @staticmethod def _format_attributes(attributes): if isinstance(attributes, BoundedAttributes): return attributes._dict # pylint: disable=protected-access if isinstance(attributes, MappingProxyType): return attributes.copy() return attributes @staticmethod def _format_events(events): f_events = [] for event in events: f_event = OrderedDict() f_event["name"] = event.name f_event["timestamp"] = util.ns_to_iso_str(event.timestamp) f_event["attributes"] = Span._format_attributes(event.attributes) f_events.append(f_event) return f_events @staticmethod def _format_links(links): f_links = [] for link in links: f_link = OrderedDict() f_link["context"] = Span._format_context(link.context) f_link["attributes"] = Span._format_attributes(link.attributes) f_links.append(f_link) return f_links
[docs]class SpanLimits: """The limits that should be enforce on recorded data such as events, links, attributes etc. This class does not enforce any limits itself. It only provides an a way read limits from env, default values and from user provided arguments. All limit arguments must be either a non-negative integer, ``None`` or ``SpanLimits.UNSET``. - All limit arguments are optional. - If a limit argument is not set, the class will try to read its value from the corresponding environment variable. - If the environment variable is not set, the default value, if any, will be used. Limit precedence: - If a model specific limit is set, it will be used. - Else if the model specific limit has a default value, the default value will be used. - Else if model specific limit has a corresponding global limit, the global limit will be used. Args: max_attributes: Maximum number of attributes that can be added to a Span. Environment variable: OTEL_SPAN_ATTRIBUTE_COUNT_LIMIT Default: {_DEFAULT_SPAN_ATTRIBUTE_COUNT_LIMIT} max_events: Maximum number of events that can be added to a Span. Environment variable: OTEL_SPAN_EVENT_COUNT_LIMIT Default: {_DEFAULT_SPAN_EVENT_COUNT_LIMIT} max_links: Maximum number of links that can be added to a Span. Environment variable: OTEL_SPAN_LINK_COUNT_LIMIT Default: {_DEFAULT_SPAN_LINK_COUNT_LIMIT} max_event_attributes: Maximum number of attributes that can be added to an Event. Default: {_DEFAULT_OTEL_EVENT_ATTRIBUTE_COUNT_LIMIT} max_link_attributes: Maximum number of attributes that can be added to a Link. Default: {_DEFAULT_OTEL_LINK_ATTRIBUTE_COUNT_LIMIT} max_attribute_length: Maximum length an attribute value can have. Values longer than the specified length will be truncated. max_span_attribute_length: Maximum length a span attribute value can have. Values longer than the specified length will be truncated. """ UNSET = -1 def __init__( self, max_attributes: Optional[int] = None, max_events: Optional[int] = None, max_links: Optional[int] = None, max_event_attributes: Optional[int] = None, max_link_attributes: Optional[int] = None, max_attribute_length: Optional[int] = None, max_span_attribute_length: Optional[int] = None, ): self.max_attributes = self._from_env_if_absent( max_attributes, OTEL_SPAN_ATTRIBUTE_COUNT_LIMIT, _DEFAULT_OTEL_SPAN_ATTRIBUTE_COUNT_LIMIT, ) self.max_events = self._from_env_if_absent( max_events, OTEL_SPAN_EVENT_COUNT_LIMIT, _DEFAULT_OTEL_SPAN_EVENT_COUNT_LIMIT, ) self.max_links = self._from_env_if_absent( max_links, OTEL_SPAN_LINK_COUNT_LIMIT, _DEFAULT_OTEL_SPAN_LINK_COUNT_LIMIT, ) self.max_event_attributes = self._from_env_if_absent( max_event_attributes, OTEL_EVENT_ATTRIBUTE_COUNT_LIMIT, _DEFAULT_OTEL_EVENT_ATTRIBUTE_COUNT_LIMIT, ) self.max_link_attributes = self._from_env_if_absent( max_link_attributes, OTEL_LINK_ATTRIBUTE_COUNT_LIMIT, _DEFAULT_OTEL_LINK_ATTRIBUTE_COUNT_LIMIT, ) self.max_attribute_length = self._from_env_if_absent( max_attribute_length, OTEL_ATTRIBUTE_VALUE_LENGTH_LIMIT, ) self.max_span_attribute_length = self._from_env_if_absent( max_span_attribute_length, OTEL_SPAN_ATTRIBUTE_VALUE_LENGTH_LIMIT, # use global attribute length limit as default self.max_attribute_length, ) def __repr__(self): return "{}(max_span_attributes={}, max_events_attributes={}, max_link_attributes={}, max_attributes={}, max_events={}, max_links={}, max_attribute_length={})".format( type(self).__name__, self.max_span_attribute_length, self.max_event_attributes, self.max_link_attributes, self.max_attributes, self.max_events, self.max_links, self.max_attribute_length, ) @classmethod def _from_env_if_absent( cls, value: Optional[int], env_var: str, default: Optional[int] = None ) -> Optional[int]: if value == cls.UNSET: return None err_msg = "{0} must be a non-negative integer but got {}" # if no value is provided for the limit, try to load it from env if value is None: # return default value if env var is not set if env_var not in environ: return default str_value = environ.get(env_var, "").strip().lower() if str_value == _ENV_VALUE_UNSET: return None try: value = int(str_value) except ValueError: raise ValueError(err_msg.format(env_var, str_value)) if value < 0: raise ValueError(err_msg.format(env_var, value)) return value
_UnsetLimits = SpanLimits( max_attributes=SpanLimits.UNSET, max_events=SpanLimits.UNSET, max_links=SpanLimits.UNSET, max_event_attributes=SpanLimits.UNSET, max_link_attributes=SpanLimits.UNSET, max_attribute_length=SpanLimits.UNSET, max_span_attribute_length=SpanLimits.UNSET, ) # not remove for backward compat. please use SpanLimits instead. SPAN_ATTRIBUTE_COUNT_LIMIT = SpanLimits._from_env_if_absent( None, OTEL_SPAN_ATTRIBUTE_COUNT_LIMIT, _DEFAULT_OTEL_SPAN_ATTRIBUTE_COUNT_LIMIT, )
[docs]class Span(trace_api.Span, ReadableSpan): """See `opentelemetry.trace.Span`. Users should create `Span` objects via the `Tracer` instead of this constructor. Args: name: The name of the operation this span represents context: The immutable span context parent: This span's parent's `opentelemetry.trace.SpanContext`, or None if this is a root span sampler: The sampler used to create this span trace_config: TODO resource: Entity producing telemetry attributes: The span's attributes to be exported events: Timestamped events to be exported links: Links to other spans to be exported span_processor: `SpanProcessor` to invoke when starting and ending this `Span`. limits: `SpanLimits` instance that was passed to the `TracerProvider` """ def __new__(cls, *args, **kwargs): if cls is Span: raise TypeError("Span must be instantiated via a tracer.") return super().__new__(cls) # pylint: disable=too-many-locals def __init__( self, name: str, context: trace_api.SpanContext, parent: Optional[trace_api.SpanContext] = None, sampler: Optional[sampling.Sampler] = None, trace_config: None = None, # TODO resource: Resource = Resource.create({}), attributes: types.Attributes = None, events: Sequence[Event] = None, links: Sequence[trace_api.Link] = (), kind: trace_api.SpanKind = trace_api.SpanKind.INTERNAL, span_processor: SpanProcessor = SpanProcessor(), instrumentation_info: InstrumentationInfo = None, record_exception: bool = True, set_status_on_exception: bool = True, limits=_UnsetLimits, ) -> None: super().__init__( name=name, context=context, parent=parent, kind=kind, resource=resource, instrumentation_info=instrumentation_info, ) self._sampler = sampler self._trace_config = trace_config self._record_exception = record_exception self._set_status_on_exception = set_status_on_exception self._span_processor = span_processor self._limits = limits self._lock = threading.Lock() self._attributes = BoundedAttributes( self._limits.max_attributes, attributes, immutable=False, max_value_len=self._limits.max_span_attribute_length, ) self._events = self._new_events() if events: for event in events: event._attributes = BoundedAttributes( self._limits.max_event_attributes, event.attributes, max_value_len=self._limits.max_attribute_length, ) self._events.append(event) if links is None: self._links = self._new_links() else: for link in links: link._attributes = BoundedAttributes( self._limits.max_link_attributes, link.attributes, max_value_len=self._limits.max_attribute_length, ) self._links = BoundedList.from_seq(self._limits.max_links, links) def __repr__(self): return '{}(name="{}", context={})'.format( type(self).__name__, self._name, self._context ) def _new_events(self): return BoundedList(self._limits.max_events) def _new_links(self): return BoundedList(self._limits.max_links)
[docs] def get_span_context(self): return self._context
[docs] def set_attributes( self, attributes: Dict[str, types.AttributeValue] ) -> None: with self._lock: if self._end_time is not None: logger.warning("Setting attribute on ended span.") return for key, value in attributes.items(): self._attributes[key] = value
[docs] def set_attribute(self, key: str, value: types.AttributeValue) -> None: return self.set_attributes({key: value})
@_check_span_ended def _add_event(self, event: EventBase) -> None: self._events.append(event)
[docs] def add_event( self, name: str, attributes: types.Attributes = None, timestamp: Optional[int] = None, ) -> None: attributes = BoundedAttributes( self._limits.max_event_attributes, attributes, max_value_len=self._limits.max_attribute_length, ) self._add_event( Event( name=name, attributes=attributes, timestamp=timestamp, ) )
def _readable_span(self) -> ReadableSpan: return ReadableSpan( name=self._name, context=self._context, parent=self._parent, resource=self._resource, attributes=self._attributes, events=self._events, links=self._links, kind=self.kind, status=self._status, start_time=self._start_time, end_time=self._end_time, instrumentation_info=self._instrumentation_info, )
[docs] def start( self, start_time: Optional[int] = None, parent_context: Optional[context_api.Context] = None, ) -> None: with self._lock: if self._start_time is not None: logger.warning("Calling start() on a started span.") return self._start_time = ( start_time if start_time is not None else _time_ns() ) self._span_processor.on_start(self, parent_context=parent_context)
[docs] def end(self, end_time: Optional[int] = None) -> None: with self._lock: if self._start_time is None: raise RuntimeError("Calling end() on a not started span.") if self._end_time is not None: logger.warning("Calling end() on an ended span.") return self._end_time = end_time if end_time is not None else _time_ns() self._span_processor.on_end(self._readable_span())
[docs] @_check_span_ended def update_name(self, name: str) -> None: self._name = name
[docs] def is_recording(self) -> bool: return self._end_time is None
[docs] @_check_span_ended def set_status(self, status: trace_api.Status) -> None: # Ignore future calls if status is already set to OK # Ignore calls to set to StatusCode.UNSET if ( self._status and self._status.status_code is StatusCode.OK or status.status_code is StatusCode.UNSET ): return self._status = status
def __exit__( self, exc_type: Optional[Type[BaseException]], exc_val: Optional[BaseException], exc_tb: Optional[TracebackType], ) -> None: """Ends context manager and calls `end` on the `Span`.""" if exc_val is not None and self.is_recording(): # Record the exception as an event # pylint:disable=protected-access if self._record_exception: self.record_exception(exception=exc_val, escaped=True) # Records status if span is used as context manager # i.e. with tracer.start_span() as span: if self._set_status_on_exception: self.set_status( Status( status_code=StatusCode.ERROR, description="{}: {}".format( exc_type.__name__, exc_val ), ) ) super().__exit__(exc_type, exc_val, exc_tb)
[docs] def record_exception( self, exception: Exception, attributes: types.Attributes = None, timestamp: Optional[int] = None, escaped: bool = False, ) -> None: """Records an exception as a span event.""" try: stacktrace = traceback.format_exc() except Exception: # pylint: disable=broad-except # workaround for python 3.4, format_exc can raise # an AttributeError if the __context__ on # an exception is None stacktrace = "Exception occurred on stacktrace formatting" _attributes = { "exception.type": exception.__class__.__name__, "exception.message": str(exception), "exception.stacktrace": stacktrace, "exception.escaped": str(escaped), } if attributes: _attributes.update(attributes) self.add_event( name="exception", attributes=_attributes, timestamp=timestamp )
class _Span(Span): """Protected implementation of `opentelemetry.trace.Span`. This constructor exists to prevent the instantiation of the `Span` class by other mechanisms than through the `Tracer`. """
[docs]class Tracer(trace_api.Tracer): """See `opentelemetry.trace.Tracer`.""" def __init__( self, sampler: sampling.Sampler, resource: Resource, span_processor: Union[ SynchronousMultiSpanProcessor, ConcurrentMultiSpanProcessor ], id_generator: IdGenerator, instrumentation_info: InstrumentationInfo, span_limits: SpanLimits, ) -> None: self.sampler = sampler self.resource = resource self.span_processor = span_processor self.id_generator = id_generator self.instrumentation_info = instrumentation_info self._span_limits = span_limits
[docs] @contextmanager def start_as_current_span( self, name: str, context: Optional[context_api.Context] = None, kind: trace_api.SpanKind = trace_api.SpanKind.INTERNAL, attributes: types.Attributes = None, links: Sequence[trace_api.Link] = (), start_time: Optional[int] = None, record_exception: bool = True, set_status_on_exception: bool = True, end_on_exit: bool = True, ) -> Iterator[trace_api.Span]: span = self.start_span( name=name, context=context, kind=kind, attributes=attributes, links=links, start_time=start_time, record_exception=record_exception, set_status_on_exception=set_status_on_exception, ) with trace_api.use_span( span, end_on_exit=end_on_exit, record_exception=record_exception, set_status_on_exception=set_status_on_exception, ) as span_context: yield span_context
[docs] def start_span( # pylint: disable=too-many-locals self, name: str, context: Optional[context_api.Context] = None, kind: trace_api.SpanKind = trace_api.SpanKind.INTERNAL, attributes: types.Attributes = None, links: Sequence[trace_api.Link] = (), start_time: Optional[int] = None, record_exception: bool = True, set_status_on_exception: bool = True, ) -> trace_api.Span: parent_span_context = trace_api.get_current_span( context ).get_span_context() if parent_span_context is not None and not isinstance( parent_span_context, trace_api.SpanContext ): raise TypeError( "parent_span_context must be a SpanContext or None." ) # is_valid determines root span if parent_span_context is None or not parent_span_context.is_valid: parent_span_context = None trace_id = self.id_generator.generate_trace_id() else: trace_id = parent_span_context.trace_id # The sampler decides whether to create a real or no-op span at the # time of span creation. No-op spans do not record events, and are not # exported. # The sampler may also add attributes to the newly-created span, e.g. # to include information about the sampling result. # The sampler may also modify the parent span context's tracestate sampling_result = self.sampler.should_sample( context, trace_id, name, kind, attributes, links ) trace_flags = ( trace_api.TraceFlags(trace_api.TraceFlags.SAMPLED) if sampling_result.decision.is_sampled() else trace_api.TraceFlags(trace_api.TraceFlags.DEFAULT) ) span_context = trace_api.SpanContext( trace_id, self.id_generator.generate_span_id(), is_remote=False, trace_flags=trace_flags, trace_state=sampling_result.trace_state, ) # Only record if is_recording() is true if sampling_result.decision.is_recording(): # pylint:disable=protected-access span = _Span( name=name, context=span_context, parent=parent_span_context, sampler=self.sampler, resource=self.resource, attributes=sampling_result.attributes.copy(), span_processor=self.span_processor, kind=kind, links=links, instrumentation_info=self.instrumentation_info, record_exception=record_exception, set_status_on_exception=set_status_on_exception, limits=self._span_limits, ) span.start(start_time=start_time, parent_context=context) else: span = trace_api.NonRecordingSpan(context=span_context) return span
[docs]class TracerProvider(trace_api.TracerProvider): """See `opentelemetry.trace.TracerProvider`.""" def __init__( self, sampler: sampling.Sampler = _TRACE_SAMPLER, resource: Resource = Resource.create({}), shutdown_on_exit: bool = True, active_span_processor: Union[ SynchronousMultiSpanProcessor, ConcurrentMultiSpanProcessor ] = None, id_generator: IdGenerator = None, span_limits: SpanLimits = None, ): self._active_span_processor = ( active_span_processor or SynchronousMultiSpanProcessor() ) if id_generator is None: self.id_generator = RandomIdGenerator() else: self.id_generator = id_generator self._resource = resource self.sampler = sampler self._span_limits = span_limits or SpanLimits() self._atexit_handler = None self._resource._attributes = BoundedAttributes( self._span_limits.max_attributes, self._resource._attributes, max_value_len=self._span_limits.max_attribute_length, ) if shutdown_on_exit: self._atexit_handler = atexit.register(self.shutdown) @property def resource(self) -> Resource: return self._resource
[docs] def get_tracer( self, instrumenting_module_name: str, instrumenting_library_version: str = "", ) -> "trace_api.Tracer": if not instrumenting_module_name: # Reject empty strings too. instrumenting_module_name = "" logger.error("get_tracer called with missing module name.") return Tracer( self.sampler, self.resource, self._active_span_processor, self.id_generator, InstrumentationInfo( instrumenting_module_name, instrumenting_library_version ), self._span_limits, )
[docs] def add_span_processor(self, span_processor: SpanProcessor) -> None: """Registers a new :class:`SpanProcessor` for this `TracerProvider`. The span processors are invoked in the same order they are registered. """ # no lock here because add_span_processor is thread safe for both # SynchronousMultiSpanProcessor and ConcurrentMultiSpanProcessor. self._active_span_processor.add_span_processor(span_processor)
[docs] def shutdown(self): """Shut down the span processors added to the tracer.""" self._active_span_processor.shutdown() if self._atexit_handler is not None: atexit.unregister(self._atexit_handler) self._atexit_handler = None
[docs] def force_flush(self, timeout_millis: int = 30000) -> bool: """Requests the active span processor to process all spans that have not yet been processed. By default force flush is called sequentially on all added span processors. This means that span processors further back in the list have less time to flush their spans. To have span processors flush their spans in parallel it is possible to initialize the tracer provider with an instance of `ConcurrentMultiSpanProcessor` at the cost of using multiple threads. Args: timeout_millis: The maximum amount of time to wait for spans to be processed. Returns: False if the timeout is exceeded, True otherwise. """ return self._active_span_processor.force_flush(timeout_millis)