Class: GraphQL::Metrics::Analyzer

Inherits:
Analysis::AST::Analyzer
  • Object
show all
Defined in:
lib/graphql/metrics/analyzer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(query_or_multiplex) ⇒ Analyzer

Returns a new instance of Analyzer.



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# File 'lib/graphql/metrics/analyzer.rb', line 8

def initialize(query_or_multiplex)
  super

  @query = query_or_multiplex
  ns = query.context.namespace(CONTEXT_NAMESPACE)
  ns[ANALYZER_INSTANCE_KEY] = self

  @static_query_metrics = nil
  @static_field_metrics = []
end

Instance Attribute Details

#query ⇒ Object (readonly)

Returns the value of attribute query.



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# File 'lib/graphql/metrics/analyzer.rb', line 6

def query
  @query
end

Instance Method Details

#analyze? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/metrics/analyzer.rb', line 19

def analyze?
  query.valid? && !query.context[GraphQL::Metrics::SKIP_GRAPHQL_METRICS_ANALYSIS]
end

#extract_fields(with_runtime_metrics: true) ⇒ Object 



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# File 'lib/graphql/metrics/analyzer.rb', line 64

def extract_fields(with_runtime_metrics: true)
  return if query.context[SKIP_FIELD_AND_ARGUMENT_METRICS]

  ns = query.context.namespace(CONTEXT_NAMESPACE)

  @static_field_metrics.each do |static_metrics|

    if with_runtime_metrics
      resolver_timings = ns[GraphQL::Metrics::INLINE_FIELD_TIMINGS][static_metrics[:path]]
      lazy_resolver_timings = ns[GraphQL::Metrics::LAZY_FIELD_TIMINGS][static_metrics[:path]]

      static_metrics[:resolver_timings] = resolver_timings || []
      static_metrics[:lazy_resolver_timings] = lazy_resolver_timings || []
    end

    field_extracted(static_metrics)
  end
end

#extract_query(runtime_query_metrics: {}) ⇒ Object 



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# File 'lib/graphql/metrics/analyzer.rb', line 23

def extract_query(runtime_query_metrics: {})
  query_extracted(@static_query_metrics.merge(runtime_query_metrics)) if @static_query_metrics
end

#on_enter_operation_definition(_node, _parent, visitor) ⇒ Object 



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# File 'lib/graphql/metrics/analyzer.rb', line 27

def on_enter_operation_definition(_node, _parent, visitor)
  @static_query_metrics = {
    operation_type: visitor.query.selected_operation.operation_type,
    operation_name: visitor.query.selected_operation.name,
  }
end

#on_leave_field(node, _parent, visitor) ⇒ Object 



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# File 'lib/graphql/metrics/analyzer.rb', line 34

def on_leave_field(node, _parent, visitor)
  return if visitor.field_definition.introspection?
  return if query.context[SKIP_FIELD_AND_ARGUMENT_METRICS]

  # Arguments can raise execution errors within their `prepare` methods
  # which aren't properly handled during analysis so we have to handle
  # them ourselves safely and return `nil`.
  argument_values = begin
    query.arguments_for(node, visitor.field_definition)
  rescue ::GraphQL::ExecutionError
    nil
  end

  extract_arguments(argument_values, visitor.field_definition) if argument_values

  static_metrics = {
    field_name: node.name,
    return_type_name: visitor.type_definition.graphql_name,
    parent_type_name: visitor.parent_type_definition.graphql_name,
    deprecated: !visitor.field_definition.deprecation_reason.nil?,
    path: visitor.response_path,
  }

  if GraphQL::Metrics.timings_capture_enabled?(query.context)
    @static_field_metrics << static_metrics
  else
    field_extracted(static_metrics)
  end
end

#result ⇒ Object 



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# File 'lib/graphql/metrics/analyzer.rb', line 83

def result
  return if GraphQL::Metrics.timings_capture_enabled?(query.context)
  return if query.context[GraphQL::Metrics::SKIP_GRAPHQL_METRICS_ANALYSIS]

  # NOTE: If we're running as a static analyzer (i.e. not with instrumentation and tracing), we still need to
  # flush static query metrics somewhere other than `after_query`.
  ns = query.context.namespace(CONTEXT_NAMESPACE)
  analyzer = ns[GraphQL::Metrics::ANALYZER_INSTANCE_KEY]
  analyzer.extract_query
end