flatc-fork 0.6.0+25.12.19-2026-02-06-03fffb2

Vendored executable of flatbuffer's `flatc` (maintained fork).
Documentation 
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from __future__ import print_function

from concurrent import futures
import os
import sys

import flatbuffers
import grpc

sys.path.append(os.path.join(os.path.dirname(__file__), "..", "..", "tests"))
import MyGame.Example.Monster as Monster
import MyGame.Example.Stat as Stat
import MyGame.Example.Vec3 as Vec3
import MyGame.Example.Test as Test
import MyGame.Example.monster_test_grpc_fb as monster_grpc_fb


test_stat_id = "test_stat_id"
test_stat_val = 8
test_stat_count = 1

test_monster_name1 = "test_monster_name1"
test_monster_name2 = "test_monster_name2"
test_string = "test_string"
test_color = 2
test_X = 3.0
test_Y = 2.0
test_Z = 6.0
test_test1 = 4.0
test_a = 8
test_b = 5
test_hp = 67
test_inventory = [1, 1, 2, 3, 5, 8]
test_testtype = 4

test_monsters_name_retrieve = ["big_monster", "small_monster"]
test_no_of_monsters = 2


class MonsterStorage(monster_grpc_fb.MonsterStorageServicer):

  def Store(self, request, context):

    m = Monster.Monster().GetRootAsMonster(request, 0)

    assert m.Name().decode("utf-8") == test_monster_name1

    assert m.Pos().X() == test_X
    assert m.Pos().Y() == test_Y
    assert m.Pos().Z() == test_Z
    assert m.Pos().Test1() == test_test1
    assert m.Pos().Test2() == test_color
    test3 = Test.Test()
    assert m.Pos().Test3(test3).A() == test_a
    assert m.Pos().Test3(test3).B() == test_b

    assert m.Hp() == test_hp

    assert m.Color() == test_color

    assert m.InventoryLength() == len(test_inventory)
    for i in range(0, len(test_inventory)):
      assert m.Inventory(i) == test_inventory[len(test_inventory) - i - 1]

    assert m.TestType() == test_testtype

    assert m.Test() is not None
    table = m.Test()

    m2 = Monster.Monster()
    m2.Init(table.Bytes, table.Pos)
    assert m2.Name().decode("utf-8") == test_monster_name2

    m3 = m.Enemy()
    assert m3.Name().decode("utf-8") == test_monster_name2

    assert m.Testarrayofstring(0).decode("utf-8") == test_string

    b = flatbuffers.Builder(0)
    i = b.CreateString(test_stat_id)
    Stat.StatStart(b)
    Stat.StatAddId(b, i)
    Stat.StatAddVal(b, test_stat_val)
    Stat.StatAddCount(b, test_stat_count)
    b.Finish(Stat.StatEnd(b))
    return bytes(b.Output())

  def Retrieve(self, request, context):

    s = Stat.Stat().GetRootAsStat(request, 0)

    no_of_monsters = test_no_of_monsters
    for i in range(0, no_of_monsters):
      b = flatbuffers.Builder(0)
      i = b.CreateString(test_monsters_name_retrieve[i])
      Monster.MonsterStart(b)
      Monster.MonsterAddName(b, i)
      b.Finish(Monster.MonsterEnd(b))
      yield bytes(b.Output())


def serve():

  server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
  monster_grpc_fb.add_MonsterStorageServicer_to_server(MonsterStorage(), server)
  server.add_insecure_port("[::]:50051")

  server.start()

  run()


def run():

  channel = grpc.insecure_channel("127.0.0.1:50051")
  stub = monster_grpc_fb.MonsterStorageStub(channel)

  b = flatbuffers.Builder(0)
  name2 = b.CreateString(test_monster_name2)
  name1 = b.CreateString(test_monster_name1)
  Monster.MonsterStart(b)
  Monster.MonsterAddName(b, name2)
  monster2 = Monster.MonsterEnd(b)
  test1 = b.CreateString(test_string)

  Monster.MonsterStartInventoryVector(b, len(test_inventory))
  for i in range(0, len(test_inventory)):
    b.PrependByte(test_inventory[i])
  inv = b.EndVector()

  Monster.MonsterStartTest4Vector(b, 2)
  Test.CreateTest(b, 10, 20)
  Test.CreateTest(b, 30, 40)
  test4 = b.EndVector()

  Monster.MonsterStartTestarrayofstringVector(b, 1)
  b.PrependUOffsetTRelative(test1)
  test_array_of_string = b.EndVector()

  Monster.MonsterStart(b)

  Monster.MonsterAddHp(b, test_hp)
  Monster.MonsterAddName(b, name1)
  Monster.MonsterAddColor(b, test_color)
  pos = Vec3.CreateVec3(
      b, test_X, test_Y, test_Z, test_test1, test_color, test_a, test_b
  )
  Monster.MonsterAddPos(b, pos)
  Monster.MonsterAddInventory(b, inv)
  Monster.MonsterAddTestType(b, test_testtype)
  Monster.MonsterAddTest(b, monster2)
  Monster.MonsterAddTest4(b, test4)
  Monster.MonsterAddEnemy(b, monster2)
  Monster.MonsterAddTestarrayofstring(b, test_array_of_string)
  monster = Monster.MonsterEnd(b)

  b.Finish(monster)

  stat_response = stub.Store(bytes(b.Output()))

  s = Stat.Stat().GetRootAsStat(stat_response, 0)

  assert s.Id().decode("utf-8") == test_stat_id
  assert s.Val() == test_stat_val
  assert s.Count() == test_stat_count

  monster_reponses = stub.Retrieve(stat_response)
  count = 0
  for monster_reponse in monster_reponses:
    m = Monster.Monster().GetRootAsMonster(monster_reponse, 0)
    assert m.Name().decode("utf-8") == test_monsters_name_retrieve[count]
    count = count + 1


if __name__ == "__main__":
  serve()