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How to use spawn_users method in locust

Best Python code snippet using locust

test_spawn_link_network.py

...12    root_output = await self.root_io_tree(13        machine=self.machine_ids[0], dataset_program_config=messages.data.demo_dataset_program_config())14    self.root_output = root_output15    await self.demo.run_for(ms=200)16    await self.spawn_users(root_output, n_users=n_output_leaves)17    await self.spawn_users(18        root_input,19        n_users=n_input_leaves,20        add_user=True,21        send_after=4000,22        ave_inter_message_time_ms=500,23        send_messages_for_ms=3000)24    # Need to wait for the new users to be fully connected.25    await self.demo.run_for(ms=1000)26    self.root_link = self.demo.connect_trees_with_sum_network(root_input, root_output, machine=self.machine_ids[0])27    await self.demo.run_for(ms=8000)28    if n_input_leaves > 0:29      assert self.demo.total_simulated_amount > 10 # Smoke test that sends were in fact simulated30    else:31      assert self.demo.total_simulated_amount == 032    output_leaves = self.demo.get_leaves(root_output)33    self.output_leaves = output_leaves34    assert len(output_leaves) == n_output_leaves35    self.demo.system.get_senders(root_output)36    self.demo.system.get_receivers(root_input)37    for leaf in output_leaves:38      assert self.demo.total_simulated_amount == self.demo.system.get_output_state(leaf)39  @pytest.mark.asyncio40  async def test_dns(self, cloud_demo):41    self.demo = cloud_demo42    self.machine_ids = await self.demo.new_machine_controllers(43        1, base_config=self.base_config(), random_seed='test_dns')44    root_input = await self.root_io_tree(45        machine=self.machine_ids[0], dataset_program_config=messages.data.demo_dataset_program_config())46    await self.demo.run_for(ms=6000)47    await self.spawn_users(root_input, n_users=2)48    domain_name = 'www.distzerotesting.com'49    self.demo.system.route_dns(root_input, domain_name)50    await self.demo.run_for(ms=2000)51  @pytest.mark.asyncio52  async def test_spawn_small_small(self, demo):53    self.demo = demo54    self.machine_ids = await demo.new_machine_controllers(55        1, base_config=self.base_config(), random_seed='test_spawn_small_small')56    await self._connect_and_test_io_trees(n_input_leaves=1, n_output_leaves=1)57  @pytest.mark.asyncio58  async def test_spawn_small_large(self, demo):59    self.demo = demo60    self.machine_ids = await demo.new_machine_controllers(61        4, base_config=self.base_config(), random_seed='test_spawn_small_large')62    await self._connect_and_test_io_trees(n_input_leaves=1, n_output_leaves=10)63  @pytest.mark.asyncio64  async def test_spawn_large_small(self, demo):65    self.demo = demo66    self.machine_ids = await demo.new_machine_controllers(67        1, base_config=self.base_config(), random_seed='test_spawn_large_small')68    await self._connect_and_test_io_trees(n_input_leaves=10, n_output_leaves=1)69  @pytest.mark.asyncio70  async def test_spawn_large_large(self, demo):71    self.demo = demo72    self.machine_ids = await demo.new_machine_controllers(73        1, base_config=self.base_config(), random_seed='test_spawn_large_large')74    await self._connect_and_test_io_trees(n_input_leaves=10, n_output_leaves=10)75  @pytest.mark.asyncio76  async def test_spawn_empty_small(self, demo):77    self.demo = demo78    self.machine_ids = await demo.new_machine_controllers(79        1, base_config=self.base_config(), random_seed='test_spawn_large_large')80    await self._connect_and_test_io_trees(n_input_leaves=0, n_output_leaves=3)81  @pytest.mark.asyncio82  async def test_spawn_small_empty(self, demo):83    self.demo = demo84    self.machine_ids = await demo.new_machine_controllers(85        1, base_config=self.base_config(), random_seed='test_spawn_large_large')86    await self._connect_and_test_io_trees(n_input_leaves=3, n_output_leaves=0)87  @pytest.mark.asyncio88  async def test_spawn_small_very_large(self, demo):89    self.demo = demo90    self.machine_ids = await demo.new_machine_controllers(91        1, base_config=self.base_config(), random_seed='test_spawn_small_very_large')92    await self._connect_and_test_io_trees(n_input_leaves=1, n_output_leaves=20)93  @pytest.mark.parametrize(94      'name,start_inputs,start_outputs,new_inputs,new_outputs,ending_input_height,ending_output_height,sender_limit',95      [96          ('grow_input', 2, 2, 5, 0, 2, 2, 10), # Just add inputs97          ('grow_output', 2, 1, 0, 5, 2, 2, 10), # Just add outputs98          ('bump_input_once', 2, 2, 10, 0, 3, 2, 10), # Add enough inputs that the tree bumps its height99          ('bump_input_twice', 2, 2, 29, 0, 4, 2, 10), # Add enough inputs that the tree bumps its height twice100          # FIXME(KK): Test and handle hourglass scenarios101          #('cause_hourglass', 2, 2, 15, 0, 3, 2, 4), # Restrict sender_limit to cause hourglass operations102      ])103  @pytest.mark.asyncio104  async def test_grow_trees(self, demo, name, start_inputs, start_outputs, new_inputs, new_outputs, ending_input_height,105                            ending_output_height, sender_limit):106    self.demo = demo107    config = self.base_config()108    # Make sure not to cause any hourglasses109    config['system_config']['SUM_NODE_SENDER_LIMIT'] = sender_limit110    self.machine_ids = await demo.new_machine_controllers(111        1, base_config=config, random_seed='test_add_leaves_after_spawn')112    await self._connect_and_test_io_trees(n_input_leaves=start_inputs, n_output_leaves=start_outputs)113    await demo.run_for(ms=7000)114    await self.spawn_users(self.root_output, n_users=new_outputs)115    await demo.run_for(ms=1000)116    await self.spawn_users(117        self.root_input,118        n_users=new_inputs,119        add_user=True,120        send_after=0,121        ave_inter_message_time_ms=500,122        send_messages_for_ms=3000)123    await demo.run_for(ms=5000)124    self.output_leaves = self.demo.get_leaves(self.root_output)125    self.input_leaves = self.demo.get_leaves(self.root_input)126    assert start_outputs + new_outputs == len(self.output_leaves)127    await demo.run_for(ms=8000)128    for leaf in self.output_leaves:129      assert self.demo.total_simulated_amount == self.demo.system.get_output_state(leaf)130      senders = self.demo.system.get_senders(leaf)...

locust_use_as_lib.py

Source: locust_use_as_lib.py

...5from locust.log import setup_logging6from locust.stats import stats_printer, stats_history, StatsCSVFileWriter7from .locust_sequential_tasks import UserGlobal8global_user = 09def spawn_users(env):10    global global_user11    while True:12        env.runner.start(env.runner.user_count + 1, spawn_rate=50)13        global_user += 114        next_arrival = random.expovariate(1 / 50)15        gevent.sleep(next_arrival / 1000.0)16def start_locust_master():17    setup_logging("INFO", None)18    logging.info('*******************')19    logging.info('{}'.format("Starting Manager"))20    logging.info('*******************')21    env = Environment(user_classes=[UserGlobal], host="http://192.168.2.12:32677")22    env.create_local_runner()23    # env.create_master_runner(master_bind_host="192.168.2.12", master_bind_port=5557)...

events_demo.py

Source: events_demo.py

1from locust import HttpUser, task, constant, SequentialTaskSet2from locust import events3import logging4@events.spawning_complete.add_listener5def spawn_users(user_count, **kwargs):6    print("Spawned ... ", user_count, " users.")7@events.request_success.add_listener8def send_notification(**kwargs):9    print("Sending the success notification")10@events.request_failure.add_listener11def send_notification(**kwargs):12    print("Sending the failed notification")13@events.quitting.add_listener14def sla(environment, **kwargs):15    if environment.stats.total.fail_ratio > 0.01:16        logging.error("Test failed due to failure ratio > 0.01%")17        environment.process_exit_code = 118        print(environment.process_exit_code)19    else:...

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