Class: Graphiti::Scope

Inherits:
Object show all
Defined in:
lib/graphiti/scope.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(object, resource, query, opts = {}) ⇒ Scope

Returns a new instance of Scope.



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# File 'lib/graphiti/scope.rb', line 22

def initialize(object, resource, query, opts = {})
  @object = object
  @resource = resource
  @query = query
  @opts = opts

  @object = @resource.around_scoping(@object, @query.hash) { |scope|
    apply_scoping(scope, opts)
  }
end

Instance Attribute Details

#object ⇒ Object

Returns the value of attribute object.



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# File 'lib/graphiti/scope.rb', line 3

def object
  @object
end

#pagination ⇒ Object (readonly)

Returns the value of attribute pagination.



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# File 'lib/graphiti/scope.rb', line 4

def pagination
  @pagination
end

#unpaginated_object ⇒ Object

Returns the value of attribute unpaginated_object.



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# File 'lib/graphiti/scope.rb', line 3

def unpaginated_object
  @unpaginated_object
end

Class Method Details

.thread_pool_executor ⇒ Object 



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# File 'lib/graphiti/scope.rb', line 8

def self.thread_pool_executor
  return @thread_pool_executor if @thread_pool_executor

  concurrency = Graphiti.config.concurrency_max_threads || 4
  @thread_pool_executor ||= @thread_pool_executor_mutex.synchronize do
    Concurrent::ThreadPoolExecutor.new(
      min_threads: 0,
      max_threads: concurrency,
      max_queue: concurrency * 4,
      fallback_policy: :caller_runs
    )
  end
end

Instance Method Details

#resolve ⇒ Object 



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# File 'lib/graphiti/scope.rb', line 33

def resolve
  if @query.zero_results?
    []
  else
    resolved = broadcast_data { |payload|
      @object = @resource.before_resolve(@object, @query)
      payload[:results] = @resource.resolve(@object)
      payload[:results]
    }
    resolved.compact!
    assign_serializer(resolved)
    yield resolved if block_given?
    @opts[:after_resolve]&.call(resolved)
    resolve_sideloads(resolved) unless @query.sideloads.empty?
    resolved
  end
end

#resolve_sideloads(results) ⇒ Object 



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# File 'lib/graphiti/scope.rb', line 51

def resolve_sideloads(results)
  return if results == []

  concurrent = Graphiti.config.concurrency
  promises = []

  @query.sideloads.each_pair do |name, q|
    sideload = @resource.class.sideload(name)
    next if sideload.nil? || sideload.shared_remote?
    parent_resource = @resource
    graphiti_context = Graphiti.context
    resolve_sideload = -> {
      Graphiti.config.before_sideload&.call(graphiti_context)
      Graphiti.context = graphiti_context
      sideload.resolve(results, q, parent_resource)
      @resource.adapter.close if concurrent
    }
    if concurrent
      promises << Concurrent::Promise.execute(executor: self.class.thread_pool_executor, &resolve_sideload)
    else
      resolve_sideload.call
    end
  end

  if concurrent
    # Wait for all promises to finish
    sleep 0.01 until promises.all? { |p| p.fulfilled? || p.rejected? }
    # Re-raise the error with correct stacktrace
    # OPTION** to avoid failing here?? if so need serializable patch
    # to avoid loading data when association not loaded
    if (rejected = promises.find(&:rejected?))
      raise rejected.reason
    end
  end
end