Class: GraphQL::Execution::Interpreter

Inherits:
Object
  • Object
show all
Defined in:
lib/graphql/execution/interpreter.rb,
lib/graphql/execution/interpreter/resolve.rb,
lib/graphql/execution/interpreter/runtime.rb,
lib/graphql/execution/interpreter/arguments.rb,
lib/graphql/execution/interpreter/hash_response.rb,
lib/graphql/execution/interpreter/argument_value.rb,
lib/graphql/execution/interpreter/arguments_cache.rb,
lib/graphql/execution/interpreter/execution_errors.rb,
lib/graphql/execution/interpreter/handles_raw_value.rb

Defined Under Namespace

Modules: HandlesRawValue, Resolve Classes: ArgumentValue, Arguments, ArgumentsCache, ExecutionErrors, HashResponse, ListResultFailedError, RawValue, Runtime

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Interpreter

Returns a new instance of Interpreter.



14
15
 
# File 'lib/graphql/execution/interpreter.rb', line 14

def initialize
end

Class Method Details

.begin_multiplex(multiplex) ⇒ Object 



33
34
35
36
37
 
# File 'lib/graphql/execution/interpreter.rb', line 33

def self.begin_multiplex(multiplex)
  # Since this is basically the batching context,
  # share it for a whole multiplex
  multiplex.context[:interpreter_instance] ||= self.new
end

.begin_query(query, multiplex) ⇒ Object 



39
40
41
42
43
44
45
46
47
 
# File 'lib/graphql/execution/interpreter.rb', line 39

def self.begin_query(query, multiplex)
  # The batching context is shared by the multiplex,
  # so fetch it out and use that instance.
  interpreter =
    query.context.namespace(:interpreter)[:interpreter_instance] =
    multiplex.context[:interpreter_instance]
  interpreter.evaluate(query)
  query
end

.finish_multiplex(_results, multiplex) ⇒ Object 



49
50
51
52
 
# File 'lib/graphql/execution/interpreter.rb', line 49

def self.finish_multiplex(_results, multiplex)
  interpreter = multiplex.context[:interpreter_instance]
  interpreter.sync_lazies(multiplex: multiplex)
end

.finish_query(query, _multiplex) ⇒ Object 



54
55
56
57
58
 
# File 'lib/graphql/execution/interpreter.rb', line 54

def self.finish_query(query, _multiplex)
  {
    "data" => query.context.namespace(:interpreter)[:runtime].final_value
  }
end

.use(schema_class) ⇒ Object 



24
25
26
27
28
29
30
31
 
# File 'lib/graphql/execution/interpreter.rb', line 24

def self.use(schema_class)
  schema_class.interpreter = true
  schema_class.query_execution_strategy(GraphQL::Execution::Interpreter)
  schema_class.mutation_execution_strategy(GraphQL::Execution::Interpreter)
  schema_class.subscription_execution_strategy(GraphQL::Execution::Interpreter)
  schema_class.add_subscription_extension_if_necessary
  GraphQL::Schema::Object.include(HandlesRawValue)
end

Instance Method Details

#evaluate(query) ⇒ Interpreter::Runtime

Run the eager part of query

Returns:



62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
 
# File 'lib/graphql/execution/interpreter.rb', line 62

def evaluate(query)
  # Although queries in a multiplex _share_ an Interpreter instance,
  # they also have another item of state, which is private to that query
  # in particular, assign it here:
  runtime = Runtime.new(
    query: query,
    response: HashResponse.new,
  )
  query.context.namespace(:interpreter)[:runtime] = runtime

  query.trace("execute_query", {query: query}) do
    runtime.run_eager
  end

  runtime
end

#execute(_operation, _root_type, query) ⇒ Object

Support Executor :S



18
19
20
21
22
 
# File 'lib/graphql/execution/interpreter.rb', line 18

def execute(_operation, _root_type, query)
  runtime = evaluate(query)
  sync_lazies(query: query)
  runtime.final_value
end

#sync_lazies(query: nil, multiplex: nil) ⇒ void

This method returns an undefined value.

Run the lazy part of query or multiplex.



81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
 
# File 'lib/graphql/execution/interpreter.rb', line 81

def sync_lazies(query: nil, multiplex: nil)
  tracer = query || multiplex
  if query.nil? && multiplex.queries.length == 1
    query = multiplex.queries[0]
  end
  queries = multiplex ? multiplex.queries : [query]
  final_values = queries.map do |query|
    runtime = query.context.namespace(:interpreter)[:runtime]
    # it might not be present if the query has an error
    runtime ? runtime.final_value : nil
  end
  final_values.compact!
  tracer.trace("execute_query_lazy", {multiplex: multiplex, query: query}) do
    Interpreter::Resolve.resolve_all(final_values)
  end
end