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How to use client_listener method in locust

Best Python code snippet using locust

test_client.py

Source:test_client.py

1import threading2from foris_forwarder.client import Client3TIMEOUT = 30.04def test_connection(5    mosquitto_host,6    mosquitto_subordinate,7    prepare_ca,8    connection_settings,9    wait_for_disconnected,10):11    process, settings, _ = connection_settings12    client = Client(settings, keepalive=5)13    assert client.connected is False14    # add post_connect hook15    connect_event = threading.Event()16    def connect(client, userdata, flags, rc):17        connect_event.set()18    client.set_connect_hook(connect)19    # add post_disconnect hook20    disconnect_event = threading.Event()21    def disconnect(client, userdata, rc):22        disconnect_event.set()23    client.set_disconnect_hook(disconnect)24    # test connect25    client.connect()26    assert connect_event.wait(TIMEOUT)27    assert client.connected is True28    # test disconnect29    client.disconnect()30    assert disconnect_event.wait(TIMEOUT)31    assert client.connected is False32    # terminte message bus33    connect_event.clear()34    client.connect()35    assert connect_event.wait(TIMEOUT)36    assert client.connected is True37    disconnect_event.clear()38    process.kill()39    process.wait()40    assert disconnect_event.wait(TIMEOUT)41    assert client.connected is False42    wait_for_disconnected(client)43def test_messaging(mosquitto_host, mosquitto_subordinate, prepare_ca, connection_settings, wait_for_disconnected):44    process, settings1, settings2 = connection_settings45    # prepare listener46    client_listener = Client(settings1)47    subscribe_event = threading.Event()48    def subscribe(client, userdata, mid, granted_qos):49        subscribe_event.set()50    client_listener.set_subscribe_hook(subscribe)51    message_event = threading.Event()52    def message(client, userdata, message):53        message_event.set()54    client_listener.set_message_hook(message)55    # prepare publisher56    client_publisher = Client(settings2)57    publish_event = threading.Event()58    def publish(client, userdata, mid):59        publish_event.set()60    client_publisher.set_publish_hook(publish)61    # wait till listener is subscribed62    client_listener.connect()63    client_listener.wait_until_connected(TIMEOUT)64    client_publisher.connect()65    client_publisher.wait_until_connected(TIMEOUT)66    # wait till listener is subscribed for topic67    assert client_listener.subscribe([("/messaging-test/+", 0)])68    assert subscribe_event.wait(TIMEOUT)69    # wait till publisher publishes a message70    assert client_publisher.publish("/messaging-test/first", '{"some": "data"}') is not None71    assert publish_event.wait(TIMEOUT)72    # check that the message was obtained by the listener73    assert message_event.wait(TIMEOUT)74    # unsubscribe and wait to be sure that message is not recieved75    unsubscribe_event = threading.Event()76    def unsubscribe(client, userdata, mid):77        unsubscribe_event.set()78    client_listener.set_unsubscribe_hook(unsubscribe)79    assert client_listener.unsubscribe(["/messaging-test/+"])80    assert unsubscribe_event.wait(TIMEOUT)81    message_event.clear()82    publish_event.clear()83    assert client_publisher.publish("/messaging-test/first", '{"some": "data"}') is not None84    assert publish_event.wait(TIMEOUT)85    assert not message_event.wait(2.0)  # no message should be recieved in 2 seconds86    # cleanup87    wait_for_disconnected(client_publisher)88    wait_for_disconnected(client_listener)89    process.kill()...

client.py

Source:client.py

...3from time import sleep4from multiprocessing.connection import Listener5from multiprocessing import Process6import sys7def client_listener(info):8    print(f"Openning listener at {info}")9    cl = Listener(address = (info['address'], info['port']), authkey = info['authkey'])10    print('.............client listener starting')11    print('.............accepting conexions')12    while True:13        conn = cl.accept()14        print('.............connection accepted from ', cl.last_accepted)15        m = conn.recv()16        print('.............message received from server', m)17def main(server_address, info):18    print('trying to connect')19    with Client(address = (server_address, 6000), authkey = b'secret password server') as conn:20        cl = Process(target = client_listener, args = (info,))21        cl.start()...

__main__.py

Source:__main__.py

1import logging.config2import os3from multiprocessing import Pipe, Process45from src.backup_scheduler.backup_scheduler import BackupScheduler6from src.client_listener.client_listener import ClientListener7from src.database.disk_database import DiskDatabase8910def main() -> int:11    logging.config.fileConfig('log.conf', disable_existing_loggers=True)12    port = int(os.getenv('PORT'))13    listen_backlog = 1014    backup_data_path = os.getenv('BACKUP_DATA_PATH')15    max_backup_processes = int(os.getenv('MAX_BACKUP_PROCESSES'))1617    backup_scheduler_recv, client_listener_send = Pipe(False)18    client_listener_recv, backup_scheduler_send = Pipe(False)1920    database = DiskDatabase(backup_data_path + "/database")21    backup_scheduler = BackupScheduler(backup_data_path + "/data",22                                       database, backup_scheduler_recv,23                                       backup_scheduler_send, max_backup_processes)24    client_listener = ClientListener(port, listen_backlog,25                                     client_listener_send, client_listener_recv)26    p = Process(target=client_listener)27    p.start()28    backup_scheduler()29    p.terminate()30    return 1  # This function should never end313233if __name__ == '__main__':
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