import multiprocessing

from arcrest import AGSTokenSecurityHandler
from arcrest.ags.server import Server
from arcrest.common.geometry import Envelope

ags_admin_url = r"http://localhost:6080/arcgis/admin"
ags_security_handler = AGSTokenSecurityHandler(username="username",
                                               password="password",
                                               org_url=ags_admin_url)

ags_rest_services_directory_user_url = r"http://localhost:6080/arcgis"
ags_service_obj = Server(ags_rest_services_directory_user_url,
                         ags_security_handler)
service_name = "SampleWorldCities"
ags_services = ags_service_obj.services

ags_mapservice = [ags_service for ags_service in ags_services 
                  if service_name in ags_service.url][0]

bbox_envelope = Envelope(1590464.1952204683, 7544716.127883499,
                         1598001.8017391723, 7546481.8772778595,
                         wkid=3857)

def handler_export_map_images():
    p = multiprocessing.Pool(10)
    result = p.apply_async(worker_export_map_images,[5])
    result.get()
    p.map(worker_export_map_images, range(1000))

def worker_export_map_images(x):
    result = ags_mapservice.exportMap(bbox_envelope,
                                      size="600,550",
                                      dpi=200)
    return

if __name__ == '__main__':
    handler_export_map_images()