Exemplo n.º 1
0
def receive_process_and_complete_message(client, queue_name):
    queue_client = client.get_queue(queue_name)
    lock_renewal = AutoLockRenew(max_workers=4)
    lock_renewal.renew_period = 120
    with queue_client.get_receiver() as queue_receiver:
        for message in queue_receiver:
            print("Received message: ", message)
            lock_renewal.register(message, timeout=10800)
            process_message(message)
            print("Completing message")
            message.complete()
            break
Exemplo n.º 2
0
def example_session_ops_sync():
    servicebus_connection_str = os.environ['SERVICE_BUS_CONNECTION_STR']
    queue_name = os.environ['SERVICE_BUS_QUEUE_NAME']
    session_id = "<your session id>"

    with ServiceBusClient.from_connection_string(
            conn_str=servicebus_connection_str) as servicebus_client:
        # [START get_session_sync]
        with servicebus_client.get_queue_receiver(
                queue_name=queue_name, session_id=session_id) as receiver:
            session = receiver.session
        # [END get_session_sync]

        # [START get_session_state_sync]
        with servicebus_client.get_queue_receiver(
                queue_name=queue_name, session_id=session_id) as receiver:
            session = receiver.session
            session_state = session.get_session_state()
        # [END get_session_state_sync]

        # [START set_session_state_sync]
        with servicebus_client.get_queue_receiver(
                queue_name=queue_name, session_id=session_id) as receiver:
            session = receiver.session
            session_state = session.set_session_state("START")
        # [END set_session_state_sync]

        # [START session_renew_lock_sync]
        with servicebus_client.get_queue_receiver(
                queue_name=queue_name, session_id=session_id) as receiver:
            session = receiver.session
            session_state = session.renew_lock()
        # [END session_renew_lock_sync]

        # [START auto_lock_renew_session_sync]
        from azure.servicebus import AutoLockRenew

        lock_renewal = AutoLockRenew(max_workers=4)
        with servicebus_client.get_queue_receiver(
                queue_name=queue_name, session_id=session_id) as receiver:
            session = receiver.session
            # Auto renew session lock for 2 minutes
            lock_renewal.register(session, timeout=120)
            for message in receiver:
                process_message(message)
                message.complete()
                # [END auto_lock_renew_session_sync]
                break
Exemplo n.º 3
0
def test_session_by_conn_str_receive_handler_with_autolockrenew(live_servicebus_config, session_queue):
    session_id = str(uuid.uuid4())
    queue_client = QueueClient.from_connection_string(
        live_servicebus_config['conn_str'],
        name=session_queue,
        debug=True)

    with queue_client.get_sender(session=session_id) as sender:
        for i in range(10):
            message = Message("{}".format(i))
            sender.send(message)

    renewer = AutoLockRenew()
    messages = []
    with queue_client.get_receiver(session=session_id, idle_timeout=5, mode=ReceiveSettleMode.PeekLock, prefetch=10) as session:
        renewer.register(session, timeout=60)
        print("Registered lock renew thread", session.locked_until, datetime.now())
        with pytest.raises(SessionLockExpired):
            for message in session:
                if not messages:
                    print("Starting first sleep")
                    time.sleep(40)
                    print("First sleep {}".format(session.locked_until - datetime.now()))
                    assert not session.expired
                    with pytest.raises(TypeError):
                        message.expired
                    assert message.locked_until is None
                    with pytest.raises(TypeError):
                        message.renew_lock()
                    assert message.lock_token is None
                    message.complete()
                    messages.append(message)

                elif len(messages) == 1:
                    print("Starting second sleep")
                    time.sleep(40)
                    print("Second sleep {}".format(session.locked_until - datetime.now()))
                    assert session.expired
                    assert isinstance(session.auto_renew_error, AutoLockRenewTimeout)
                    try:
                        message.complete()
                        raise AssertionError("Didn't raise SessionLockExpired")
                    except SessionLockExpired as e:
                        assert isinstance(e.inner_exception, AutoLockRenewTimeout)
                    messages.append(message)

    renewer.shutdown()
    assert len(messages) == 2
def test_pqueue_by_queue_client_conn_str_receive_handler_with_autolockrenew(live_servicebus_config, partitioned_queue):
    queue_client = QueueClient.from_connection_string(
        live_servicebus_config['conn_str'],
        name=partitioned_queue,
        debug=True)

    with queue_client.get_sender() as sender:
        for i in range(10):
            message = Message("{}".format(i))
            sender.send(message)

    renewer = AutoLockRenew()
    messages = []
    with queue_client.get_receiver(idle_timeout=5, mode=ReceiveSettleMode.PeekLock, prefetch=10) as receiver:
        for message in receiver:
            if not messages:
                messages.append(message)
                assert not message.expired
                renewer.register(message, timeout=60)
                print("Registered lock renew thread", message.locked_until, datetime.now())
                time.sleep(50)
                print("Finished first sleep", message.locked_until)
                assert not message.expired
                time.sleep(25)
                print("Finished second sleep", message.locked_until, datetime.now())
                assert message.expired
                try:
                    message.complete()
                    raise AssertionError("Didn't raise MessageLockExpired")
                except MessageLockExpired as e:
                    assert isinstance(e.inner_exception, AutoLockRenewTimeout)
            else:
                if message.expired:
                    print("Remaining messages", message.locked_until, datetime.now())
                    assert message.expired
                    with pytest.raises(MessageLockExpired):
                        message.complete()
                else:
                    assert message.header.delivery_count >= 1
                    print("Remaining messages", message.locked_until, datetime.now())
                    messages.append(message)
                    message.complete()
    renewer.shutdown()
    assert len(messages) == 11
def message_processing(sb_client, queue_name, messages):
    while True:
        try:
            with sb_client.get_queue_session_receiver(
                    queue_name, idle_timeout=1) as receiver:
                renewer = AutoLockRenew()
                renewer.register(receiver.session)
                receiver.session.set_session_state("OPEN")
                for message in receiver:
                    messages.append(message)
                    print("Message: {}".format(message))
                    print("Time to live: {}".format(
                        message.header.time_to_live))
                    print("Sequence number: {}".format(
                        message.sequence_number))
                    print("Enqueue Sequence number: {}".format(
                        message.enqueue_sequence_number))
                    print("Partition ID: {}".format(message.partition_id))
                    print("Partition Key: {}".format(message.partition_key))
                    print("Locked until: {}".format(message.locked_until_utc))
                    print("Lock Token: {}".format(message.lock_token))
                    print("Enqueued time: {}".format(
                        message.enqueued_time_utc))
                    message.complete()
                    if str(message) == 'shutdown':
                        receiver.session.set_session_state("CLOSED")
                renewer.shutdown()
        except NoActiveSession:
            print(
                "There are no non-empty sessions remaining; exiting.  This may present as a UserError in the azure portal."
            )
            return
Exemplo n.º 6
0
def renew_lock_on_session_of_the_sessionful_entity():
    servicebus_client = ServiceBusClient.from_connection_string(conn_str=CONNECTION_STR)

    with servicebus_client:

        with servicebus_client.get_queue_sender(queue_name=SESSION_QUEUE_NAME) as sender:
            msgs_to_send = [Message("session message: {}".format(i), session_id='SESSION') for i in range(10)]
            sender.send_messages(msgs_to_send)
            print('Send messages to sessionful queue.')

        renewer = AutoLockRenew()

        with servicebus_client.get_queue_session_receiver(
            queue_name=SESSION_QUEUE_NAME,
            session_id='SESSION',
            prefetch=10
        ) as receiver:

            # automatically renew the lock on the session for 100 seconds
            renewer.register(receiver.session, timeout=100)
            print('Register session into AutoLockRenew.')

            received_msgs = receiver.receive_messages(max_batch_size=10, max_wait_time=5)
            time.sleep(100)  # message handling for long period (E.g. application logic)

            for msg in received_msgs:
                msg.complete()

            print('Complete messages.')

        renewer.close()
Exemplo n.º 7
0
def renew_lock_on_message_received_from_non_sessionful_entity():
    servicebus_client = ServiceBusClient.from_connection_string(conn_str=CONNECTION_STR)

    with servicebus_client:
        with servicebus_client.get_queue_sender(queue_name=QUEUE_NAME) as sender:
            msgs_to_send = [Message("message: {}".format(i)) for i in range(10)]
            sender.send_messages(msgs_to_send)
            print('Send messages to non-sessionful queue.')
        
        # Can also be called via "with AutoLockRenew() as renewer" to automate shutdown.
        renewer = AutoLockRenew()

        with servicebus_client.get_queue_receiver(queue_name=QUEUE_NAME, prefetch=10) as receiver:
            received_msgs = receiver.receive_messages(max_batch_size=10, max_wait_time=5)

            for msg in received_msgs:
                # automatically renew the lock on each message for 100 seconds
                renewer.register(msg, timeout=100)
            print('Register messages into AutoLockRenew done.')

            time.sleep(100)  # message handling for long period (E.g. application logic)

            for msg in received_msgs:
                msg.complete() # Settling the message deregisters it from the AutoLockRenewer
            print('Complete messages.')

        renewer.close()
Exemplo n.º 8
0
    def test_session_by_conn_str_receive_handler_with_autolockrenew(
            self, servicebus_namespace_connection_string, servicebus_queue,
            **kwargs):

        session_id = str(uuid.uuid4())
        queue_client = QueueClient.from_connection_string(
            servicebus_namespace_connection_string,
            name=servicebus_queue.name,
            debug=False)

        with queue_client.get_sender(session=session_id) as sender:
            for i in range(10):
                message = Message("{}".format(i))
                sender.send(message)

        renewer = AutoLockRenew()
        messages = []
        with queue_client.get_receiver(session=session_id,
                                       idle_timeout=5,
                                       mode=ReceiveSettleMode.PeekLock,
                                       prefetch=10) as session:
            renewer.register(session, timeout=60)
            print("Registered lock renew thread", session.locked_until,
                  datetime.now())
            with pytest.raises(SessionLockExpired):
                for message in session:
                    if not messages:
                        print("Starting first sleep")
                        time.sleep(40)
                        print("First sleep {}".format(session.locked_until -
                                                      datetime.now()))
                        assert not session.expired
                        with pytest.raises(TypeError):
                            message.expired
                        assert message.locked_until is None
                        with pytest.raises(TypeError):
                            message.renew_lock()
                        assert message.lock_token is None
                        message.complete()
                        messages.append(message)

                    elif len(messages) == 1:
                        print("Starting second sleep")
                        time.sleep(40)
                        print("Second sleep {}".format(session.locked_until -
                                                       datetime.now()))
                        assert session.expired
                        assert isinstance(session.auto_renew_error,
                                          AutoLockRenewTimeout)
                        try:
                            message.complete()
                            raise AssertionError(
                                "Didn't raise SessionLockExpired")
                        except SessionLockExpired as e:
                            assert isinstance(e.inner_exception,
                                              AutoLockRenewTimeout)
                        messages.append(message)

        renewer.shutdown()
        assert len(messages) == 2
def renew_lock_with_lock_renewal_failure_callback():
    servicebus_client = ServiceBusClient.from_connection_string(
        conn_str=CONNECTION_STR)

    with servicebus_client:
        with servicebus_client.get_queue_sender(
                queue_name=QUEUE_NAME) as sender:
            sender.send_messages(Message("message"))

        with AutoLockRenew() as renewer:
            # For this sample we're going to set the renewal recurrence of the autolockrenewer to greater than the
            # service side message lock duration, to demonstrate failure.  Normally, this should not be adjusted.
            renewer._sleep_time = 40
            with servicebus_client.get_queue_receiver(
                    queue_name=QUEUE_NAME, prefetch_count=10) as receiver:

                def on_lock_renew_failure_callback(renewable, error):
                    # If auto-lock-renewal fails, this function will be called.
                    # If failure is due to an error, the second argument will be populated, otherwise
                    # it will default to `None`.
                    # This callback can be an ideal location to log the failure, or take action to safely
                    # handle any processing on the message or session that was in progress.
                    print("Intentionally failed to renew lock on {} due to {}".
                          format(renewable, error))

                received_msgs = receiver.receive_messages(max_message_count=1,
                                                          max_wait_time=5)

                for msg in received_msgs:
                    # automatically renew the lock on each message for 120 seconds
                    renewer.register(
                        msg,
                        timeout=90,
                        on_lock_renew_failure=on_lock_renew_failure_callback)
                print('Register messages into AutoLockRenew done.')

                # Cause the messages and autorenewal to time out.
                # Other reasons for renew failure could include a network or service outage.
                time.sleep(80)

                try:
                    for msg in received_msgs:
                        msg.complete()
                except MessageLockExpired as e:
                    print(
                        'Messages cannot be settled if they have timed out. (This is expected)'
                    )

                print('Lock renew failure demonstration complete.')
def test_pqueue_by_queue_client_conn_str_receive_handler_with_autolockrenew(
        live_servicebus_config, partitioned_queue):
    queue_client = QueueClient.from_connection_string(
        live_servicebus_config['conn_str'],
        name=partitioned_queue,
        debug=False)

    with queue_client.get_sender() as sender:
        for i in range(10):
            message = Message("{}".format(i))
            sender.send(message)

    renewer = AutoLockRenew()
    messages = []
    with queue_client.get_receiver(idle_timeout=5,
                                   mode=ReceiveSettleMode.PeekLock,
                                   prefetch=10) as receiver:
        for message in receiver:
            if not messages:
                messages.append(message)
                assert not message.expired
                renewer.register(message, timeout=60)
                print("Registered lock renew thread", message.locked_until,
                      datetime.now())
                time.sleep(50)
                print("Finished first sleep", message.locked_until)
                assert not message.expired
                time.sleep(25)
                print("Finished second sleep", message.locked_until,
                      datetime.now())
                assert message.expired
                try:
                    message.complete()
                    raise AssertionError("Didn't raise MessageLockExpired")
                except MessageLockExpired as e:
                    assert isinstance(e.inner_exception, AutoLockRenewTimeout)
            else:
                if message.expired:
                    print("Remaining messages", message.locked_until,
                          datetime.now())
                    assert message.expired
                    with pytest.raises(MessageLockExpired):
                        message.complete()
                else:
                    assert message.header.delivery_count >= 1
                    print("Remaining messages", message.locked_until,
                          datetime.now())
                    messages.append(message)
                    message.complete()
    renewer.shutdown()
    assert len(messages) == 11
Exemplo n.º 11
0
    def test_session_by_conn_str_receive_handler_with_autolockrenew(self, servicebus_namespace_connection_string, servicebus_queue, **kwargs):

        session_id = str(uuid.uuid4())
        with ServiceBusClient.from_connection_string(
            servicebus_namespace_connection_string, logging_enable=False) as sb_client:

            with sb_client.get_queue_sender(servicebus_queue.name) as sender:
                for i in range(10):
                    message = Message("{}".format(i), session_id=session_id)
                    sender.send(message)

            renewer = AutoLockRenew()
            messages = []
            with sb_client.get_queue_session_receiver(servicebus_queue.name, session_id=session_id, idle_timeout=5, mode=ReceiveSettleMode.PeekLock, prefetch=10) as receiver:
                renewer.register(receiver.session, timeout=60)
                print("Registered lock renew thread", receiver.session._locked_until_utc, utc_now())
                with pytest.raises(SessionLockExpired):
                    for message in receiver:
                        if not messages:
                            print("Starting first sleep")
                            time.sleep(40)
                            print("First sleep {}".format(receiver.session._locked_until_utc - utc_now()))
                            assert not receiver.session.expired
                            with pytest.raises(TypeError):
                                message.expired
                            assert message.locked_until_utc is None
                            with pytest.raises(TypeError):
                                message.renew_lock()
                            assert message.lock_token is not None
                            message.complete()
                            messages.append(message)

                        elif len(messages) == 1:
                            print("Starting second sleep")
                            time.sleep(40) # ensure renewer expires
                            print("Second sleep {}".format(receiver.session._locked_until_utc - utc_now()))
                            sleep_until_expired(receiver.session) # and then ensure it didn't slip a renew under the wire.
                            assert receiver.session.expired
                            assert isinstance(receiver.session.auto_renew_error, AutoLockRenewTimeout)
                            try:
                                message.complete()
                                raise AssertionError("Didn't raise SessionLockExpired")
                            except SessionLockExpired as e:
                                assert isinstance(e.inner_exception, AutoLockRenewTimeout)
                            messages.append(message)

            renewer.shutdown()
            assert len(messages) == 2
Exemplo n.º 12
0
def example_send_and_receive_sync():
    servicebus_sender = example_create_servicebus_sender_sync()
    servicebus_receiver = example_create_servicebus_receiver_sync()

    from azure.servicebus import Message
    # [START send_sync]
    with servicebus_sender:
        message = Message("Hello World")
        servicebus_sender.send(message)
    # [END send_sync]

    # [START create_batch_sync]
    with servicebus_sender:
        batch_message = servicebus_sender.create_batch()
        batch_message.add(Message("Single message inside batch"))
    # [END create_batch_sync]

    # [START send_complex_message]
    message = Message("Hello World!!")
    message.session_id = "MySessionID"
    message.partition_key = "UsingSpecificPartition"
    message.user_properties = {'data': 'custom_data'}
    message.time_to_live = datetime.timedelta(seconds=30)
    # [END send_complex_message]

    # [START peek_messages_sync]
    with servicebus_receiver:
        messages = servicebus_receiver.peek()
        for message in messages:
            print(message)
    # [END peek_messages_sync]

    # [START auto_lock_renew_message_sync]
    from azure.servicebus import AutoLockRenew
    lock_renewal = AutoLockRenew(max_workers=4)
    with servicebus_receiver:
        for message in servicebus_receiver:
            # Auto renew message for 1 minute.
            lock_renewal.register(message, timeout=60)
            process_message(message)
            message.complete()
            # [END auto_lock_renew_message_sync]
            break

    # [START receive_sync]
    with servicebus_receiver:
        messages = servicebus_receiver.receive(max_wait_time=5)
        for message in messages:
            print(message)
            message.complete()
    # [END receive_sync]

    # [START receive_complex_message]
        messages = servicebus_receiver.receive(max_wait_time=5)
        for message in messages:
            print("Receiving: {}".format(message))
            print("Time to live: {}".format(message.time_to_live))
            print("Sequence number: {}".format(message.sequence_number))
            print("Enqueue Sequence numger: {}".format(
                message.enqueue_sequence_number))
            print("Partition ID: {}".format(message.partition_id))
            print("Partition Key: {}".format(message.partition_key))
            print("User Properties: {}".format(message.user_properties))
            print("Annotations: {}".format(message.annotations))
            print("Delivery count: {}".format(message.header.delivery_count))
            print("Message ID: {}".format(message.properties.message_id))
            print("Locked until: {}".format(message.locked_until_utc))
            print("Lock Token: {}".format(message.lock_token))
            print("Enqueued time: {}".format(message.enqueued_time_utc))
Exemplo n.º 13
0
def test_example_send_receive_service_bus(live_servicebus_config, standard_queue, session_queue):
    import os
    import datetime
    from azure.servicebus import ServiceBusClient, ServiceBusResourceNotFound
    from azure.servicebus import Message

    client = create_servicebus_client()

    try:
        # [START create_queue_client_directly]
        import os
        from azure.servicebus import QueueClient

        connection_str = os.environ['SERVICE_BUS_CONNECTION_STR']
        queue_client = QueueClient.from_connection_string(connection_str, name="MyQueue")
        queue_properties = queue_client.get_properties()

        # [END create_queue_client_directly]
    except ServiceBusResourceNotFound:
        pass

    try:
        # [START create_topic_client_directly]
        import os
        from azure.servicebus import TopicClient

        connection_str = os.environ['SERVICE_BUS_CONNECTION_STR']
        topic_client = TopicClient.from_connection_string(connection_str, name="MyTopic")
        properties = topic_client.get_properties()

        # [END create_topic_client_directly]
    except ServiceBusResourceNotFound:
        pass

    try:
        # [START create_sub_client_directly]
        import os
        from azure.servicebus import SubscriptionClient

        connection_str = os.environ['SERVICE_BUS_CONNECTION_STR']
        subscription_client = SubscriptionClient.from_connection_string(
            connection_str, name="MySub", topic="MyTopic")
        properties = subscription_client.get_properties()

        # [END create_sub_client_directly]
    except ServiceBusResourceNotFound:
        pass

    queue_client = client.get_queue(standard_queue)
    session_client = client.get_queue(session_queue)

    # [START get_sender]
    with queue_client.get_sender() as queue_sender:

        queue_sender.send(Message("First"))
        queue_sender.send(Message("Second"))
    # [END get_sender]

    # [START send_message_service_bus_multiple]
    from azure.servicebus import Message

    message1 = Message("Hello World!")
    message2 = Message("How are you?")
    queue_client.send([message1, message2])
    # [END send_message_service_bus_multiple]

    # [START send_complex_message]
    message = Message("Hello World!")
    message.session_id = "MySessionID"
    message.partition_key = "UsingSpecificPartition"
    message.user_properties = {'data': 'custom_data'}
    message.time_to_live = datetime.timedelta(seconds=30)

    queue_client.send(message)
    # [END send_complex_message]

    # [START send_batch_message]
    from azure.servicebus import BatchMessage

    def batched_data():
        for i in range(100):
            yield "Batched Message no. {}".format(i)

    message = BatchMessage(batched_data())
    results = queue_client.send(message)
    # [END send_batch_message]

    # [START send_message_service_bus]
    from azure.servicebus import Message

    message = Message("Hello World!")
    queue_client.send(message)
    # [END send_message_service_bus]

    # [START get_receiver]
    with queue_client.get_receiver() as queue_receiver:
        messages = queue_receiver.fetch_next(timeout=3)
    # [END get_receiver]

    # [START peek_messages_service_bus]
    # Specify the number of messages to peek at.
    pending_messages = queue_client.peek(count=5)
    # [END peek_messages_service_bus]

    # [START auto_lock_renew_message]
    from azure.servicebus import AutoLockRenew

    lock_renewal = AutoLockRenew(max_workers=4)
    with queue_client.get_receiver(idle_timeout=3) as queue_receiver:
        for message in queue_receiver:
            # Auto renew message for 1 minute.
            lock_renewal.register(message, timeout=60)
            process_message(message)

            message.complete()
    # [END auto_lock_renew_message]

    # [START auto_lock_renew_session]
    from azure.servicebus import AutoLockRenew

    lock_renewal = AutoLockRenew(max_workers=4)
    with session_client.get_receiver(session="MySessionID", idle_timeout=3) as session:
        # Auto renew session lock for 2 minutes
        lock_renewal.register(session, timeout=120)

        for message in session:
            process_message(message)
            message.complete()
    # [END auto_lock_renew_session]

    # [START list_sessions_service_bus]
    session_ids = session_client.list_sessions()

    # List sessions updated after specific time
    import datetime
    yesterday = datetime.datetime.today() - datetime.timedelta(days=1)
    session_ids = session_client.list_sessions(updated_since=yesterday)
    # [END list_sessions_service_bus]

    try:
        # [START receive_deferred_messages_service_bus]
        seq_numbers = []
        with queue_client.get_receiver(idle_timeout=3) as queue_receiver:
            for message in queue_receiver:
                seq_numbers.append(message.sequence_number)
                message.defer()

        # Receive deferred messages - provide sequence numbers of
        # messages which were deferred.
        deferred = queue_client.receive_deferred_messages(sequence_numbers=seq_numbers)
        # [END receive_deferred_messages_service_bus]
    except ValueError:
        pass
    deferred = []
    try:
        # [START settle_deferred_messages_service_bus]
        queue_client.settle_deferred_messages('completed', deferred)
        # [END settle_deferred_messages_service_bus]
    except ValueError:
        pass

    # [START get_dead_letter_receiver]
    # Get dead lettered messages
    with queue_client.get_deadletter_receiver(idle_timeout=1) as dead_letter_receiver:

        # Receive dead lettered message continuously
        for message in dead_letter_receiver:
            print(message)
            message.complete()
Exemplo n.º 14
0
def test_example_send_receive_service_bus(live_servicebus_config, standard_queue, session_queue):
    import os
    import datetime
    from azure.servicebus import ServiceBusClient, ServiceBusResourceNotFound
    from azure.servicebus import Message

    client = create_servicebus_client()

    try:
        # [START create_queue_client_directly]
        import os
        from azure.servicebus import QueueClient

        connection_str = os.environ['SERVICE_BUS_CONNECTION_STR']
        queue_client = QueueClient.from_connection_string(connection_str, name="MyQueue")
        queue_properties = queue_client.get_properties()

        # [END create_queue_client_directly]
    except ServiceBusResourceNotFound:
        pass

    try:
        # [START create_topic_client_directly]
        import os
        from azure.servicebus import TopicClient

        connection_str = os.environ['SERVICE_BUS_CONNECTION_STR']
        topic_client = TopicClient.from_connection_string(connection_str, name="MyTopic")
        properties = topic_client.get_properties()

        # [END create_topic_client_directly]
    except ServiceBusResourceNotFound:
        pass

    try:
        # [START create_sub_client_directly]
        import os
        from azure.servicebus import SubscriptionClient

        connection_str = os.environ['SERVICE_BUS_CONNECTION_STR']
        subscription_client = SubscriptionClient.from_connection_string(
            connection_str, name="MySub", topic="MyTopic")
        properties = subscription_client.get_properties()

        # [END create_sub_client_directly]
    except ServiceBusResourceNotFound:
        pass

    queue_client = client.get_queue(standard_queue)
    session_client = client.get_queue(session_queue)

    # [START get_sender]
    with queue_client.get_sender() as queue_sender:

        queue_sender.send(Message("First"))
        queue_sender.send(Message("Second"))
    # [END get_sender]

    # [START send_message_service_bus_multiple]
    from azure.servicebus import Message

    message1 = Message("Hello World!")
    message2 = Message("How are you?")
    queue_client.send([message1, message2])
    # [END send_message_service_bus_multiple]

    # [START send_complex_message]
    message = Message("Hello World!")
    message.session_id = "MySessionID"
    message.partition_key = "UsingSpecificPartition"
    message.user_properties = {'data': 'custom_data'}
    message.time_to_live = datetime.timedelta(seconds=30)

    queue_client.send(message)
    # [END send_complex_message]

    # [START send_batch_message]
    from azure.servicebus import BatchMessage

    def batched_data():
        for i in range(100):
            yield "Batched Message no. {}".format(i)

    message = BatchMessage(batched_data())
    results = queue_client.send(message)
    # [END send_batch_message]

    # [START send_message_service_bus]
    from azure.servicebus import Message

    message = Message("Hello World!")
    queue_client.send(message)
    # [END send_message_service_bus]

    # [START get_receiver]
    with queue_client.get_receiver() as queue_receiver:
        messages = queue_receiver.fetch_next(timeout=3)
    # [END get_receiver]

    # [START peek_messages_service_bus]
    # Specify the number of messages to peek at.
    pending_messages = queue_client.peek(count=5)
    # [END peek_messages_service_bus]

    # [START auto_lock_renew_message]
    from azure.servicebus import AutoLockRenew

    lock_renewal = AutoLockRenew(max_workers=4)
    with queue_client.get_receiver(idle_timeout=3) as queue_receiver:
        for message in queue_receiver:
            # Auto renew message for 1 minute.
            lock_renewal.register(message, timeout=60)
            process_message(message)

            message.complete()
    # [END auto_lock_renew_message]

    # [START auto_lock_renew_session]
    from azure.servicebus import AutoLockRenew

    lock_renewal = AutoLockRenew(max_workers=4)
    with session_client.get_receiver(session="MySessionID", idle_timeout=3) as session:
        # Auto renew session lock for 2 minutes
        lock_renewal.register(session, timeout=120)

        for message in session:
            process_message(message)
            message.complete()
    # [END auto_lock_renew_session]

    # [START list_sessions_service_bus]
    session_ids = session_client.list_sessions()

    # List sessions updated after specific time
    import datetime
    yesterday = datetime.datetime.today() - datetime.timedelta(days=1)
    session_ids = session_client.list_sessions(updated_since=yesterday)
    # [END list_sessions_service_bus]

    try:
        # [START receive_deferred_messages_service_bus]
        seq_numbers = []
        with queue_client.get_receiver(idle_timeout=3) as queue_receiver:
            for message in queue_receiver:
                seq_numbers.append(message.sequence_number)
                message.defer()

        # Receive deferred messages - provide sequence numbers of
        # messages which were deferred.
        deferred = queue_client.receive_deferred_messages(sequence_numbers=seq_numbers)
        # [END receive_deferred_messages_service_bus]
    except ValueError:
        pass
    deferred = []
    try:
        # [START settle_deferred_messages_service_bus]
        queue_client.settle_deferred_messages('completed', deferred)
        # [END settle_deferred_messages_service_bus]
    except ValueError:
        pass

    # [START get_dead_letter_receiver]
    # Get dead lettered messages
    with queue_client.get_deadletter_receiver(idle_timeout=1) as dead_letter_receiver:

        # Receive dead lettered message continuously
        for message in dead_letter_receiver:
            print(message)
            message.complete()