Class: Datadog::Tracing::TraceDigest

Inherits:
Object
  • Object
show all
Defined in:
lib/datadog/tracing/trace_digest.rb

Overview

Trace digest that represents the important parts of an active trace. Used to propagate context and continue traces across execution boundaries. TODO: Update all references from span to parent (ex: span_id -> parent_id)

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(span_id: nil, span_name: nil, span_resource: nil, span_service: nil, span_type: nil, span_links: nil, trace_distributed_tags: nil, trace_hostname: nil, trace_id: nil, trace_name: nil, trace_origin: nil, trace_process_id: nil, trace_resource: nil, trace_runtime_id: nil, trace_sampling_priority: nil, trace_service: nil, trace_distributed_id: nil, trace_flags: nil, trace_state: nil, trace_state_unknown_fields: nil, trace_otel_random_value: nil, trace_otel_threshold: nil, trace_otel_unknown_fields: nil, span_remote: true, baggage: nil) ⇒ TraceDigest

Returns a new instance of TraceDigest.



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# File 'lib/datadog/tracing/trace_digest.rb', line 124

def initialize(
  span_id: nil,
  span_name: nil,
  span_resource: nil,
  span_service: nil,
  span_type: nil,
  span_links: nil,
  trace_distributed_tags: nil,
  trace_hostname: nil,
  trace_id: nil,
  trace_name: nil,
  trace_origin: nil,
  trace_process_id: nil,
  trace_resource: nil,
  trace_runtime_id: nil,
  trace_sampling_priority: nil,
  trace_service: nil,
  trace_distributed_id: nil,
  trace_flags: nil,
  trace_state: nil,
  trace_state_unknown_fields: nil,
  trace_otel_random_value: nil,
  trace_otel_threshold: nil,
  trace_otel_unknown_fields: nil,
  span_remote: true,
  baggage: nil
)
  @span_id = span_id
  @span_name = span_name && span_name.dup.freeze
  @span_resource = span_resource && span_resource.dup.freeze
  @span_service = span_service && span_service.dup.freeze
  @span_type = span_type && span_type.dup.freeze
  @span_links = span_links && span_links.dup.freeze
  @trace_distributed_tags = trace_distributed_tags && trace_distributed_tags.dup.freeze
  @trace_hostname = trace_hostname && trace_hostname.dup.freeze
  @trace_id = trace_id
  @trace_name = trace_name && trace_name.dup.freeze
  @trace_origin = trace_origin && trace_origin.dup.freeze
  @trace_process_id = trace_process_id
  @trace_resource = trace_resource && trace_resource.dup.freeze
  @trace_runtime_id = trace_runtime_id && trace_runtime_id.dup.freeze
  @trace_sampling_priority = trace_sampling_priority
  @trace_service = trace_service && trace_service.dup.freeze
  @trace_distributed_id = trace_distributed_id
  @trace_flags = trace_flags
  @trace_state = trace_state && trace_state.dup.freeze
  @trace_state_unknown_fields = trace_state_unknown_fields && trace_state_unknown_fields.dup.freeze
  @trace_otel_random_value = trace_otel_random_value && trace_otel_random_value.dup.freeze
  @trace_otel_threshold = trace_otel_threshold && trace_otel_threshold.dup.freeze
  @trace_otel_unknown_fields = trace_otel_unknown_fields && trace_otel_unknown_fields.dup.freeze
  @span_remote = span_remote
  @baggage = baggage && baggage.dup.freeze
  freeze
end

Instance Attribute Details

#baggage ⇒ Object (readonly)

TODO: The documentation for the last attribute above won't be rendered. TODO: This might be a YARD bug as adding an attribute, making it now second-last attribute, renders correctly.



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# File 'lib/datadog/tracing/trace_digest.rb', line 97

attr_reader \
:span_id,
:span_name,
:span_resource,
:span_service,
:span_type,
:span_links,
:trace_distributed_tags,
:trace_hostname,
:trace_id,
:trace_name,
:trace_origin,
:trace_process_id,
:trace_resource,
:trace_runtime_id,
:trace_sampling_priority,
:trace_service,
:trace_distributed_id,
:trace_flags,
:trace_state,
:trace_state_unknown_fields,
:trace_otel_random_value,
:trace_otel_threshold,
:trace_otel_unknown_fields,
:span_remote,
:baggage

#span_id ⇒ Integer (readonly)

Datadog id for the currently active span.

Returns:

  • (Integer) 


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# File 'lib/datadog/tracing/trace_digest.rb', line 97

def span_id
  @span_id
end

#span_links ⇒ Array<Datadog::Tracing::SpanLink>? (readonly)

Span links associated with this trace context.

Returns:



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# File 'lib/datadog/tracing/trace_digest.rb', line 97

attr_reader \
:span_id,
:span_name,
:span_resource,
:span_service,
:span_type,
:span_links,
:trace_distributed_tags,
:trace_hostname,
:trace_id,
:trace_name,
:trace_origin,
:trace_process_id,
:trace_resource,
:trace_runtime_id,
:trace_sampling_priority,
:trace_service,
:trace_distributed_id,
:trace_flags,
:trace_state,
:trace_state_unknown_fields,
:trace_otel_random_value,
:trace_otel_threshold,
:trace_otel_unknown_fields,
:span_remote,
:baggage

#span_name ⇒ String (readonly)

The operation name of the currently active span.

Returns:

  • (String) 


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# File 'lib/datadog/tracing/trace_digest.rb', line 97

attr_reader \
:span_id,
:span_name,
:span_resource,
:span_service,
:span_type,
:span_links,
:trace_distributed_tags,
:trace_hostname,
:trace_id,
:trace_name,
:trace_origin,
:trace_process_id,
:trace_resource,
:trace_runtime_id,
:trace_sampling_priority,
:trace_service,
:trace_distributed_id,
:trace_flags,
:trace_state,
:trace_state_unknown_fields,
:trace_otel_random_value,
:trace_otel_threshold,
:trace_otel_unknown_fields,
:span_remote,
:baggage

#span_remote ⇒ Boolean (readonly)

Represents whether a TraceDigest was propagated from a remote parent or created locally.

Returns:

  • (Boolean)

See Also:



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# File 'lib/datadog/tracing/trace_digest.rb', line 97

attr_reader \
:span_id,
:span_name,
:span_resource,
:span_service,
:span_type,
:span_links,
:trace_distributed_tags,
:trace_hostname,
:trace_id,
:trace_name,
:trace_origin,
:trace_process_id,
:trace_resource,
:trace_runtime_id,
:trace_sampling_priority,
:trace_service,
:trace_distributed_id,
:trace_flags,
:trace_state,
:trace_state_unknown_fields,
:trace_otel_random_value,
:trace_otel_threshold,
:trace_otel_unknown_fields,
:span_remote,
:baggage

#span_resource ⇒ String (readonly)

The resource name of the currently active span.

Returns:

  • (String) 


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# File 'lib/datadog/tracing/trace_digest.rb', line 97

attr_reader \
:span_id,
:span_name,
:span_resource,
:span_service,
:span_type,
:span_links,
:trace_distributed_tags,
:trace_hostname,
:trace_id,
:trace_name,
:trace_origin,
:trace_process_id,
:trace_resource,
:trace_runtime_id,
:trace_sampling_priority,
:trace_service,
:trace_distributed_id,
:trace_flags,
:trace_state,
:trace_state_unknown_fields,
:trace_otel_random_value,
:trace_otel_threshold,
:trace_otel_unknown_fields,
:span_remote,
:baggage

#span_service ⇒ String (readonly)

The service of the currently active span.

Returns:

  • (String) 


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# File 'lib/datadog/tracing/trace_digest.rb', line 97

attr_reader \
:span_id,
:span_name,
:span_resource,
:span_service,
:span_type,
:span_links,
:trace_distributed_tags,
:trace_hostname,
:trace_id,
:trace_name,
:trace_origin,
:trace_process_id,
:trace_resource,
:trace_runtime_id,
:trace_sampling_priority,
:trace_service,
:trace_distributed_id,
:trace_flags,
:trace_state,
:trace_state_unknown_fields,
:trace_otel_random_value,
:trace_otel_threshold,
:trace_otel_unknown_fields,
:span_remote,
:baggage

#span_type ⇒ String (readonly)

The type of the currently active span.

Returns:

  • (String) 


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# File 'lib/datadog/tracing/trace_digest.rb', line 97

attr_reader \
:span_id,
:span_name,
:span_resource,
:span_service,
:span_type,
:span_links,
:trace_distributed_tags,
:trace_hostname,
:trace_id,
:trace_name,
:trace_origin,
:trace_process_id,
:trace_resource,
:trace_runtime_id,
:trace_sampling_priority,
:trace_service,
:trace_distributed_id,
:trace_flags,
:trace_state,
:trace_state_unknown_fields,
:trace_otel_random_value,
:trace_otel_threshold,
:trace_otel_unknown_fields,
:span_remote,
:baggage

#trace_distributed_id ⇒ Integer (readonly)

The trace id extracted from a distributed context, if different from trace_id.

The current use case is when the distributed context has a trace id integer larger than 64-bit: This attribute will preserve the original id, while trace_id will only contain the lower 64 bits.

Returns:

  • (Integer)

See Also:



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# File 'lib/datadog/tracing/trace_digest.rb', line 97

attr_reader \
:span_id,
:span_name,
:span_resource,
:span_service,
:span_type,
:span_links,
:trace_distributed_tags,
:trace_hostname,
:trace_id,
:trace_name,
:trace_origin,
:trace_process_id,
:trace_resource,
:trace_runtime_id,
:trace_sampling_priority,
:trace_service,
:trace_distributed_id,
:trace_flags,
:trace_state,
:trace_state_unknown_fields,
:trace_otel_random_value,
:trace_otel_threshold,
:trace_otel_unknown_fields,
:span_remote,
:baggage

#trace_distributed_tags ⇒ Hash<String,String> (readonly)

Datadog-specific tags that support richer distributed tracing association.

Returns:

  • (Hash<String,String>) 


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# File 'lib/datadog/tracing/trace_digest.rb', line 97

attr_reader \
:span_id,
:span_name,
:span_resource,
:span_service,
:span_type,
:span_links,
:trace_distributed_tags,
:trace_hostname,
:trace_id,
:trace_name,
:trace_origin,
:trace_process_id,
:trace_resource,
:trace_runtime_id,
:trace_sampling_priority,
:trace_service,
:trace_distributed_id,
:trace_flags,
:trace_state,
:trace_state_unknown_fields,
:trace_otel_random_value,
:trace_otel_threshold,
:trace_otel_unknown_fields,
:span_remote,
:baggage

#trace_flags ⇒ Integer (readonly)

The W3C "trace-flags" extracted from a distributed context. This field is an 8-bit unsigned integer.

Returns:

  • (Integer)

See Also:



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# File 'lib/datadog/tracing/trace_digest.rb', line 97

attr_reader \
:span_id,
:span_name,
:span_resource,
:span_service,
:span_type,
:span_links,
:trace_distributed_tags,
:trace_hostname,
:trace_id,
:trace_name,
:trace_origin,
:trace_process_id,
:trace_resource,
:trace_runtime_id,
:trace_sampling_priority,
:trace_service,
:trace_distributed_id,
:trace_flags,
:trace_state,
:trace_state_unknown_fields,
:trace_otel_random_value,
:trace_otel_threshold,
:trace_otel_unknown_fields,
:span_remote,
:baggage

#trace_hostname ⇒ String (readonly)

The hostname of the currently active trace. Use to attribute traces to hosts.

Returns:

  • (String) 


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# File 'lib/datadog/tracing/trace_digest.rb', line 97

attr_reader \
:span_id,
:span_name,
:span_resource,
:span_service,
:span_type,
:span_links,
:trace_distributed_tags,
:trace_hostname,
:trace_id,
:trace_name,
:trace_origin,
:trace_process_id,
:trace_resource,
:trace_runtime_id,
:trace_sampling_priority,
:trace_service,
:trace_distributed_id,
:trace_flags,
:trace_state,
:trace_state_unknown_fields,
:trace_otel_random_value,
:trace_otel_threshold,
:trace_otel_unknown_fields,
:span_remote,
:baggage

#trace_id ⇒ Integer (readonly)

Datadog id for the currently active trace.

Returns:

  • (Integer) 


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# File 'lib/datadog/tracing/trace_digest.rb', line 97

attr_reader \
:span_id,
:span_name,
:span_resource,
:span_service,
:span_type,
:span_links,
:trace_distributed_tags,
:trace_hostname,
:trace_id,
:trace_name,
:trace_origin,
:trace_process_id,
:trace_resource,
:trace_runtime_id,
:trace_sampling_priority,
:trace_service,
:trace_distributed_id,
:trace_flags,
:trace_state,
:trace_state_unknown_fields,
:trace_otel_random_value,
:trace_otel_threshold,
:trace_otel_unknown_fields,
:span_remote,
:baggage

#trace_name ⇒ Integer (readonly)

Operation name for the currently active trace.

Returns:

  • (Integer) 


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# File 'lib/datadog/tracing/trace_digest.rb', line 97

attr_reader \
:span_id,
:span_name,
:span_resource,
:span_service,
:span_type,
:span_links,
:trace_distributed_tags,
:trace_hostname,
:trace_id,
:trace_name,
:trace_origin,
:trace_process_id,
:trace_resource,
:trace_runtime_id,
:trace_sampling_priority,
:trace_service,
:trace_distributed_id,
:trace_flags,
:trace_state,
:trace_state_unknown_fields,
:trace_otel_random_value,
:trace_otel_threshold,
:trace_otel_unknown_fields,
:span_remote,
:baggage

#trace_origin ⇒ String (readonly)

Datadog-specific attribution of this trace's creation.

Returns:

  • (String) 


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# File 'lib/datadog/tracing/trace_digest.rb', line 97

attr_reader \
:span_id,
:span_name,
:span_resource,
:span_service,
:span_type,
:span_links,
:trace_distributed_tags,
:trace_hostname,
:trace_id,
:trace_name,
:trace_origin,
:trace_process_id,
:trace_resource,
:trace_runtime_id,
:trace_sampling_priority,
:trace_service,
:trace_distributed_id,
:trace_flags,
:trace_state,
:trace_state_unknown_fields,
:trace_otel_random_value,
:trace_otel_threshold,
:trace_otel_unknown_fields,
:span_remote,
:baggage

#trace_otel_random_value ⇒ String (readonly)

OpenTelemetry consistent probability sampling random value.

Returns:

  • (String) 


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# File 'lib/datadog/tracing/trace_digest.rb', line 97

attr_reader \
:span_id,
:span_name,
:span_resource,
:span_service,
:span_type,
:span_links,
:trace_distributed_tags,
:trace_hostname,
:trace_id,
:trace_name,
:trace_origin,
:trace_process_id,
:trace_resource,
:trace_runtime_id,
:trace_sampling_priority,
:trace_service,
:trace_distributed_id,
:trace_flags,
:trace_state,
:trace_state_unknown_fields,
:trace_otel_random_value,
:trace_otel_threshold,
:trace_otel_unknown_fields,
:span_remote,
:baggage

#trace_otel_threshold ⇒ String (readonly)

OpenTelemetry consistent probability sampling threshold.

Returns:

  • (String) 


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# File 'lib/datadog/tracing/trace_digest.rb', line 97

attr_reader \
:span_id,
:span_name,
:span_resource,
:span_service,
:span_type,
:span_links,
:trace_distributed_tags,
:trace_hostname,
:trace_id,
:trace_name,
:trace_origin,
:trace_process_id,
:trace_resource,
:trace_runtime_id,
:trace_sampling_priority,
:trace_service,
:trace_distributed_id,
:trace_flags,
:trace_state,
:trace_state_unknown_fields,
:trace_otel_random_value,
:trace_otel_threshold,
:trace_otel_unknown_fields,
:span_remote,
:baggage

#trace_otel_unknown_fields ⇒ String (readonly)

Unrecognized ot= fields, retained with a trailing ; for propagation.

Returns:

  • (String) 


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# File 'lib/datadog/tracing/trace_digest.rb', line 97

attr_reader \
:span_id,
:span_name,
:span_resource,
:span_service,
:span_type,
:span_links,
:trace_distributed_tags,
:trace_hostname,
:trace_id,
:trace_name,
:trace_origin,
:trace_process_id,
:trace_resource,
:trace_runtime_id,
:trace_sampling_priority,
:trace_service,
:trace_distributed_id,
:trace_flags,
:trace_state,
:trace_state_unknown_fields,
:trace_otel_random_value,
:trace_otel_threshold,
:trace_otel_unknown_fields,
:span_remote,
:baggage

#trace_process_id ⇒ Integer (readonly)

The OS-specific process id.

Returns:

  • (Integer) 


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# File 'lib/datadog/tracing/trace_digest.rb', line 97

attr_reader \
:span_id,
:span_name,
:span_resource,
:span_service,
:span_type,
:span_links,
:trace_distributed_tags,
:trace_hostname,
:trace_id,
:trace_name,
:trace_origin,
:trace_process_id,
:trace_resource,
:trace_runtime_id,
:trace_sampling_priority,
:trace_service,
:trace_distributed_id,
:trace_flags,
:trace_state,
:trace_state_unknown_fields,
:trace_otel_random_value,
:trace_otel_threshold,
:trace_otel_unknown_fields,
:span_remote,
:baggage

#trace_resource ⇒ String (readonly)

The resource name of the currently active trace.

Returns:

  • (String) 


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# File 'lib/datadog/tracing/trace_digest.rb', line 97

attr_reader \
:span_id,
:span_name,
:span_resource,
:span_service,
:span_type,
:span_links,
:trace_distributed_tags,
:trace_hostname,
:trace_id,
:trace_name,
:trace_origin,
:trace_process_id,
:trace_resource,
:trace_runtime_id,
:trace_sampling_priority,
:trace_service,
:trace_distributed_id,
:trace_flags,
:trace_state,
:trace_state_unknown_fields,
:trace_otel_random_value,
:trace_otel_threshold,
:trace_otel_unknown_fields,
:span_remote,
:baggage

#trace_runtime_id ⇒ String (readonly)

Unique id to this Ruby process. Used to differentiate traces coming from child processes forked from same parent process.

Returns:

  • (String) 


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# File 'lib/datadog/tracing/trace_digest.rb', line 97

attr_reader \
:span_id,
:span_name,
:span_resource,
:span_service,
:span_type,
:span_links,
:trace_distributed_tags,
:trace_hostname,
:trace_id,
:trace_name,
:trace_origin,
:trace_process_id,
:trace_resource,
:trace_runtime_id,
:trace_sampling_priority,
:trace_service,
:trace_distributed_id,
:trace_flags,
:trace_state,
:trace_state_unknown_fields,
:trace_otel_random_value,
:trace_otel_threshold,
:trace_otel_unknown_fields,
:span_remote,
:baggage

#trace_sampling_priority ⇒ Integer (readonly)

Datadog-specific sampling decision for the currently active trace.

Returns:

  • (Integer) 


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# File 'lib/datadog/tracing/trace_digest.rb', line 97

attr_reader \
:span_id,
:span_name,
:span_resource,
:span_service,
:span_type,
:span_links,
:trace_distributed_tags,
:trace_hostname,
:trace_id,
:trace_name,
:trace_origin,
:trace_process_id,
:trace_resource,
:trace_runtime_id,
:trace_sampling_priority,
:trace_service,
:trace_distributed_id,
:trace_flags,
:trace_state,
:trace_state_unknown_fields,
:trace_otel_random_value,
:trace_otel_threshold,
:trace_otel_unknown_fields,
:span_remote,
:baggage

#trace_service ⇒ String (readonly)

The service of the currently active trace.

Returns:

  • (String) 


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# File 'lib/datadog/tracing/trace_digest.rb', line 97

attr_reader \
:span_id,
:span_name,
:span_resource,
:span_service,
:span_type,
:span_links,
:trace_distributed_tags,
:trace_hostname,
:trace_id,
:trace_name,
:trace_origin,
:trace_process_id,
:trace_resource,
:trace_runtime_id,
:trace_sampling_priority,
:trace_service,
:trace_distributed_id,
:trace_flags,
:trace_state,
:trace_state_unknown_fields,
:trace_otel_random_value,
:trace_otel_threshold,
:trace_otel_unknown_fields,
:span_remote,
:baggage

#trace_state ⇒ String (readonly)

W3C "tracestate" members other than dd= and ot=, which are stored in parsed fields.

Returns:

  • (String)

See Also:



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# File 'lib/datadog/tracing/trace_digest.rb', line 97

attr_reader \
:span_id,
:span_name,
:span_resource,
:span_service,
:span_type,
:span_links,
:trace_distributed_tags,
:trace_hostname,
:trace_id,
:trace_name,
:trace_origin,
:trace_process_id,
:trace_resource,
:trace_runtime_id,
:trace_sampling_priority,
:trace_service,
:trace_distributed_id,
:trace_flags,
:trace_state,
:trace_state_unknown_fields,
:trace_otel_random_value,
:trace_otel_threshold,
:trace_otel_unknown_fields,
:span_remote,
:baggage

#trace_state_unknown_fields ⇒ String (readonly)

From W3C "tracestate"'s dd= entry, when keys are not recognized they are stored here long with their values. This allows later propagation to include those unknown fields, as they can represent future versions of the spec sending data through this service. This value ends in a trailing ; to facilitate serialization.

Returns:

  • (String) 


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# File 'lib/datadog/tracing/trace_digest.rb', line 97

attr_reader \
:span_id,
:span_name,
:span_resource,
:span_service,
:span_type,
:span_links,
:trace_distributed_tags,
:trace_hostname,
:trace_id,
:trace_name,
:trace_origin,
:trace_process_id,
:trace_resource,
:trace_runtime_id,
:trace_sampling_priority,
:trace_service,
:trace_distributed_id,
:trace_flags,
:trace_state,
:trace_state_unknown_fields,
:trace_otel_random_value,
:trace_otel_threshold,
:trace_otel_unknown_fields,
:span_remote,
:baggage

Instance Method Details

#merge(field_value_pairs) ⇒ TraceDigest

Creates a copy of this object, modifying the provided fields.

Parameters:

  • field_value_pairs (Hash<String>) —

    the fields to be overwritten

Returns:

  • (TraceDigest) —

    returns a copy of this object with the field_value_pairs modified



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# File 'lib/datadog/tracing/trace_digest.rb', line 182

def merge(field_value_pairs)
  # DEV: Because we want to sometimes freeze the values provided to `TraceDigest`, it's best
  # DEV: to let `#initialize` decide how to handle each field, instead of duplicating that logic here.
  TraceDigest.new(
    span_id: span_id,
    span_name: span_name,
    span_resource: span_resource,
    span_service: span_service,
    span_type: span_type,
    span_links: span_links,
    trace_distributed_tags: trace_distributed_tags,
    trace_hostname: trace_hostname,
    trace_id: trace_id,
    trace_name: trace_name,
    trace_origin: trace_origin,
    trace_process_id: trace_process_id,
    trace_resource: trace_resource,
    trace_runtime_id: trace_runtime_id,
    trace_sampling_priority: trace_sampling_priority,
    trace_service: trace_service,
    trace_distributed_id: trace_distributed_id,
    trace_flags: trace_flags,
    trace_state: trace_state,
    trace_state_unknown_fields: trace_state_unknown_fields,
    trace_otel_random_value: trace_otel_random_value,
    trace_otel_threshold: trace_otel_threshold,
    trace_otel_unknown_fields: trace_otel_unknown_fields,
    span_remote: span_remote,
    baggage: baggage, **field_value_pairs
  )
end