Class: Sentry::Transaction

Inherits:
Span show all
Defined in:
lib/sentry/transaction.rb

Defined Under Namespace

Classes: SpanRecorder

Constant Summary collapse

SENTRY_TRACE_REGEXP = 
Regexp.new(
  "^[ \t]*" +  # whitespace
  "([0-9a-f]{32})?" +  # trace_id
  "-?([0-9a-f]{16})?" +  # span_id
  "-?([01])?" +  # sampled
  "[ \t]*$"  # whitespace
)
UNLABELD_NAME =

whitespace

"<unlabeled transaction>".freeze
MESSAGE_PREFIX = 
"[Tracing]"

Constants inherited from Span

Span::STATUS_MAP

Instance Attribute Summary collapse

Attributes inherited from Span

#data, #description, #op, #parent_span_id, #sampled, #span_id, #span_recorder, #start_timestamp, #status, #tags, #timestamp, #trace_id

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Span

#get_trace_context, #set_data, #set_description, #set_http_status, #set_op, #set_status, #set_tag, #set_timestamp, #to_sentry_trace, #with_child_span

Constructor Details

#initialize(name: nil, parent_sampled: nil, **options) ⇒ Transaction

Returns a new instance of Transaction.



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# File 'lib/sentry/transaction.rb', line 15

def initialize(name: nil, parent_sampled: nil, **options)
  super(**options)

  @name = name
  @parent_sampled = parent_sampled
  set_span_recorder
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/sentry/transaction.rb', line 13

def name
  @name
end

#parent_sampled ⇒ Object (readonly)

Returns the value of attribute parent_sampled.



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# File 'lib/sentry/transaction.rb', line 13

def parent_sampled
  @parent_sampled
end

Class Method Details

.from_sentry_trace(sentry_trace, **options) ⇒ Object 



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# File 'lib/sentry/transaction.rb', line 28

def self.from_sentry_trace(sentry_trace, **options)
  return unless sentry_trace

  match = SENTRY_TRACE_REGEXP.match(sentry_trace)
  return if match.nil?
  trace_id, parent_span_id, sampled_flag = match[1..3]

  sampled = sampled_flag != "0"

  new(trace_id: trace_id, parent_span_id: parent_span_id, parent_sampled: sampled, sampled: sampled, **options)
end

Instance Method Details

#deep_dup ⇒ Object 



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# File 'lib/sentry/transaction.rb', line 57

def deep_dup
  copy = super
  copy.set_span_recorder

  @span_recorder.spans.each do |span|
    # span_recorder's first span is the current span, which should not be added to the copy's spans
    next if span == self
    copy.span_recorder.add(span.dup)
  end

  copy
end

#finish(hub: nil) ⇒ Object 



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# File 'lib/sentry/transaction.rb', line 120

def finish(hub: nil)
  super() # Span#finish doesn't take arguments

  if @name.nil?
    @name = UNLABELD_NAME
  end

  return unless @sampled || @parent_sampled

  hub ||= Sentry.get_current_hub
  event = hub.current_client.event_from_transaction(self)
  hub.capture_event(event)
end

#set_initial_sample_desicion(sampling_context = {}) ⇒ Object 



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# File 'lib/sentry/transaction.rb', line 70

def set_initial_sample_desicion(sampling_context = {})
  unless Sentry.configuration.tracing_enabled?
    @sampled = false
    return
  end

  return unless @sampled.nil?

  transaction_description = generate_transaction_description

  logger = Sentry.configuration.logger
  sample_rate = Sentry.configuration.traces_sample_rate
  traces_sampler = Sentry.configuration.traces_sampler

  if traces_sampler.is_a?(Proc)
    sampling_context = sampling_context.merge(
      parent_sampled: @parent_sampled,
      transaction_context: self.to_hash
    )

    sample_rate = traces_sampler.call(sampling_context)
  end

  unless [true, false].include?(sample_rate) || (sample_rate.is_a?(Numeric) && sample_rate >= 0.0 && sample_rate <= 1.0)
    @sampled = false
    logger.warn("#{MESSAGE_PREFIX} Discarding #{transaction_description} because of invalid sample_rate: #{sample_rate}")
    return
  end

  if sample_rate == 0.0 || sample_rate == false
    @sampled = false
    logger.debug("#{MESSAGE_PREFIX} Discarding #{transaction_description} because traces_sampler returned 0 or false")
    return
  end

  if sample_rate == true
    @sampled = true
  else
    @sampled = Random.rand < sample_rate
  end

  if @sampled
    logger.debug("#{MESSAGE_PREFIX} Starting #{transaction_description}")
  else
    logger.debug(
      "#{MESSAGE_PREFIX} Discarding #{transaction_description} because it's not included in the random sample (sampling rate = #{sample_rate})"
    )
  end
end

#set_span_recorder ⇒ Object 



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# File 'lib/sentry/transaction.rb', line 23

def set_span_recorder
  @span_recorder = SpanRecorder.new(1000)
  @span_recorder.add(self)
end

#start_child(**options) ⇒ Object 



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# File 'lib/sentry/transaction.rb', line 46

def start_child(**options)
  child_span = super
  child_span.span_recorder = @span_recorder

  if @sampled
    @span_recorder.add(child_span)
  end

  child_span
end

#to_hash ⇒ Object 



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# File 'lib/sentry/transaction.rb', line 40

def to_hash
  hash = super
  hash.merge!(name: @name, sampled: @sampled, parent_sampled: @parent_sampled)
  hash
end