Class: GraphQL::Metrics::Tracer

Inherits:
Object
  • Object
show all
Defined in:
lib/graphql/metrics/tracer.rb

Defined Under Namespace

Classes: PreContext

Constant Summary collapse

GRAPHQL_GEM_EXECUTE_MULTIPLEX_KEY =

NOTE: These constants come from the graphql ruby gem and are in “chronological” order based on the phases of execution of the graphql-ruby gem, though old versions of the gem aren’t always consistent about this (see github.com/rmosolgo/graphql-ruby/issues/3393). Most of them can be run multiple times when multiplexing multiple queries.

'execute_multiplex'
GRAPHQL_GEM_LEXING_KEY =

wraps everything below this line; only run once

'lex'
GRAPHQL_GEM_PARSING_KEY =

may not trigger if the query is passed in pre-parsed

'parse'
GRAPHQL_GEM_VALIDATION_KEY =

may not trigger if the query is passed in pre-parsed

'validate'
GRAPHQL_GEM_ANALYZE_MULTIPLEX_KEY =

wraps all ‘analyze_query`s; only run once

'analyze_multiplex'
GRAPHQL_GEM_ANALYZE_QUERY_KEY = 
'analyze_query'
GRAPHQL_GEM_EXECUTE_QUERY_KEY = 
'execute_query'
GRAPHQL_GEM_TRACING_FIELD_KEYS = 
[
  GRAPHQL_GEM_TRACING_FIELD_KEY = 'execute_field',
  GRAPHQL_GEM_TRACING_LAZY_FIELD_KEY = 'execute_field_lazy'
]

Instance Method Summary collapse

Instance Method Details

#trace(key, data, &block) ⇒ Object 



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# File 'lib/graphql/metrics/tracer.rb', line 22

def trace(key, data, &block)
  # NOTE: Context doesn't exist yet during lexing, parsing.
  context = data[:query]&.context
  skip_tracing = context&.fetch(GraphQL::Metrics::SKIP_GRAPHQL_METRICS_ANALYSIS, false)
  return yield if skip_tracing

  case key
  when GRAPHQL_GEM_EXECUTE_MULTIPLEX_KEY
    return capture_multiplex_start_time(&block)
  when GRAPHQL_GEM_LEXING_KEY
    return capture_lexing_time(&block)
  when GRAPHQL_GEM_PARSING_KEY
    return capture_parsing_time(&block)
  when GRAPHQL_GEM_VALIDATION_KEY
    return capture_validation_time(context, &block)
  when GRAPHQL_GEM_ANALYZE_MULTIPLEX_KEY
    # Ensures that we reset potentially long-lived PreContext objects between multiplexs. We reset at this point
    # since all parsing and validation will be done by this point, and a GraphQL::Query::Context will exist.
    pre_context.reset
    return yield
  when GRAPHQL_GEM_ANALYZE_QUERY_KEY
    return capture_analysis_time(context, &block)
  when GRAPHQL_GEM_EXECUTE_QUERY_KEY
    capture_query_start_time(context, &block)
  when *GRAPHQL_GEM_TRACING_FIELD_KEYS
    return yield if context[SKIP_FIELD_AND_ARGUMENT_METRICS]
    return yield unless GraphQL::Metrics.timings_capture_enabled?(data[:query].context)

    context_key = case key
    when GRAPHQL_GEM_TRACING_FIELD_KEY
      GraphQL::Metrics::INLINE_FIELD_TIMINGS
    when GRAPHQL_GEM_TRACING_LAZY_FIELD_KEY
      GraphQL::Metrics::LAZY_FIELD_TIMINGS
    end

    trace_field(context_key, data, &block)
  else
    return yield
  end
end