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/hash_response.rb,
lib/graphql/execution/interpreter/execution_errors.rb

Defined Under Namespace

Modules: Resolve Classes: ExecutionErrors, HashResponse, Runtime

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Interpreter

Returns a new instance of Interpreter



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# File 'lib/graphql/execution/interpreter.rb', line 10

def initialize
end

Class Method Details

.begin_multiplex(multiplex) ⇒ Object 



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# 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 



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# 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 



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# 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 



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# 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_defn) ⇒ Object 



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# File 'lib/graphql/execution/interpreter.rb', line 20

def self.use(schema_defn)
  schema_defn.target.interpreter = true
  # Reach through the legacy objects for the actual class defn
  schema_class = schema_defn.target.class
  # This is not good, since both of these are holding state now,
  # we have to update both :(
  [schema_class, schema_defn].each do |schema_config|
    schema_config.query_execution_strategy(GraphQL::Execution::Interpreter)
    schema_config.mutation_execution_strategy(GraphQL::Execution::Interpreter)
    schema_config.subscription_execution_strategy(GraphQL::Execution::Interpreter)
  end
end

Instance Method Details

#evaluate(query) ⇒ Interpreter::Runtime

Run the eager part of query

Returns:



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# 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



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

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.



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# 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