azure.servicebus.aio package¶

class azure.servicebus.aio.ServiceBusClient(fully_qualified_namespace: str, credential: TokenCredential, **kwargs: Any)[source]¶

The ServiceBusClient class defines a high level interface for getting ServiceBusSender and ServiceBusReceiver.

Variables

fully_qualified_namespace (str) – The fully qualified host name for the Service Bus namespace. The namespace format is: <yournamespace>.servicebus.windows.net.

Parameters

fully_qualified_namespace (str) – The fully qualified host name for the Service Bus namespace. The namespace format is: <yournamespace>.servicebus.windows.net.
credential (TokenCredential) – The credential object used for authentication which implements a particular interface for getting tokens. It accepts credential objects generated by the azure-identity library and objects that implement the get_token(self, *scopes) method.

Keyword Arguments

logging_enable (bool) – Whether to output network trace logs to the logger. Default is False.
transport_type (TransportType) – The type of transport protocol that will be used for communicating with the Service Bus service. Default is TransportType.Amqp.
http_proxy (dict) – HTTP proxy settings. This must be a dictionary with the following keys: ‘proxy_hostname’ (str value) and ‘proxy_port’ (int value). Additionally the following keys may also be present: ‘username’, ‘password’.
user_agent (str) – If specified, this will be added in front of the built-in user agent string.
retry_total (int) – The total number of attempts to redo a failed operation when an error occurs. Default value is 3.
retry_backoff_factor (float) – Delta back-off internal in the unit of second between retries. Default value is 0.8.
retry_backoff_max (float) – Maximum back-off interval in the unit of second. Default value is 120.

Example:

Create a new instance of the ServiceBusClient.¶

import os
from azure.identity.aio import DefaultAzureCredential
from azure.servicebus.aio import ServiceBusClient
fully_qualified_namespace = os.environ['SERVICE_BUS_FULLY_QUALIFIED_NAMESPACE']
servicebus_client = ServiceBusClient(
    fully_qualified_namespace=fully_qualified_namespace,
    credential=DefaultAzureCredential()
)

async close() → None [source]¶

Close down the ServiceBus client. All spawned senders, receivers and underlying connection will be shutdown.

Returns: None

classmethod from_connection_string(conn_str: str, **kwargs: Any) → azure.servicebus.aio._servicebus_client_async.ServiceBusClient[source]¶

Create a ServiceBusClient from a connection string.

Parameters

conn_str (str) – The connection string of a Service Bus.

Keyword Arguments

logging_enable (bool) – Whether to output network trace logs to the logger. Default is False.
transport_type (TransportType) – The type of transport protocol that will be used for communicating with the Service Bus service. Default is TransportType.Amqp.
http_proxy (dict) – HTTP proxy settings. This must be a dictionary with the following keys: ‘proxy_hostname’ (str value) and ‘proxy_port’ (int value). Additionally the following keys may also be present: ‘username’, ‘password’.
user_agent (str) – If specified, this will be added in front of the built-in user agent string.
retry_total (int) – The total number of attempts to redo a failed operation when an error occurs. Default value is 3.
retry_backoff_factor (float) – Delta back-off internal in the unit of second between retries. Default value is 0.8.
retry_backoff_max (float) – Maximum back-off interval in the unit of second. Default value is 120.

Return type

ServiceBusClient

Example:

Create a new instance of the ServiceBusClient from connection string.¶

import os
from azure.servicebus.aio import ServiceBusClient
servicebus_connection_str = os.environ['SERVICE_BUS_CONNECTION_STR']
servicebus_client = ServiceBusClient.from_connection_string(conn_str=servicebus_connection_str)

get_queue_receiver(queue_name: str, **kwargs: Any) → azure.servicebus.aio._servicebus_receiver_async.ServiceBusReceiver[source]¶

Get ServiceBusReceiver for the specific queue.

Parameters

queue_name (str) – The path of specific Service Bus Queue the client connects to.

Keyword Arguments

session_id (Union[str, NEXT_AVAILABLE_SESSION]) – A specific session from which to receive. This must be specified for a sessionful queue, otherwise it must be None. In order to receive messages from the next available session, set this to ~azure.servicebus.NEXT_AVAILABLE_SESSION.
str]] sub_queue (Optional[Union[ServiceBusSubQueue,) – If specified, the subqueue this receiver will connect to. This includes the DEAD_LETTER and TRANSFER_DEAD_LETTER queues, holds messages that can’t be delivered to any receiver or messages that can’t be processed. The default is None, meaning connect to the primary queue. Can be assigned values from ServiceBusSubQueue enum or equivalent string values “deadletter” and “transferdeadletter”.
receive_mode (Union[ServiceBusReceiveMode, str]) – The mode with which messages will be retrieved from the entity. The two options are PEEK_LOCK and RECEIVE_AND_DELETE. Messages received with PEEK_LOCK must be settled within a given lock period before they will be removed from the queue. Messages received with RECEIVE_AND_DELETE will be immediately removed from the queue, and cannot be subsequently rejected or re-received if the client fails to process the message. The default mode is PEEK_LOCK.
max_wait_time (Optional[float]) – The timeout in seconds between received messages after which the receiver will automatically stop receiving. The default value is None, meaning no timeout.
auto_lock_renewer (Optional[AutoLockRenewer]) – An ~azure.servicebus.aio.AutoLockRenewer can be provided such that messages are automatically registered on receipt. If the receiver is a session receiver, it will apply to the session instead.
prefetch_count (int) – The maximum number of messages to cache with each request to the service. This setting is only for advanced performance tuning. Increasing this value will improve message throughput performance but increase the chance that messages will expire while they are cached if they’re not processed fast enough. The default value is 0, meaning messages will be received from the service and processed one at a time. In the case of prefetch_count being 0, ServiceBusReceiver.receive would try to cache max_message_count (if provided) within its request to the service.

Return type

ServiceBusReceiver

Example:

Create a new instance of the ServiceBusSender from ServiceBusClient.¶

import os
from azure.servicebus.aio import ServiceBusClient
servicebus_connection_str = os.environ['SERVICE_BUS_CONNECTION_STR']
queue_name = os.environ['SERVICE_BUS_QUEUE_NAME']
servicebus_client = ServiceBusClient.from_connection_string(conn_str=servicebus_connection_str)
async with servicebus_client:
    queue_receiver = servicebus_client.get_queue_receiver(queue_name=queue_name)

get_queue_sender(queue_name: str, **kwargs: Any) → azure.servicebus.aio._servicebus_sender_async.ServiceBusSender[source]¶

Get ServiceBusSender for the specific queue.

Parameters: queue_name (str) – The path of specific Service Bus Queue the client connects to.
Return type: ServiceBusSender

Example:

Create a new instance of the ServiceBusClient from connection string.¶

import os
from azure.servicebus.aio import ServiceBusClient
servicebus_connection_str = os.environ['SERVICE_BUS_CONNECTION_STR']
queue_name = os.environ['SERVICE_BUS_QUEUE_NAME']
servicebus_client = ServiceBusClient.from_connection_string(conn_str=servicebus_connection_str)
async with servicebus_client:
    queue_sender = servicebus_client.get_queue_sender(queue_name=queue_name)

get_subscription_receiver(topic_name: str, subscription_name: str, **kwargs: Any) → azure.servicebus.aio._servicebus_receiver_async.ServiceBusReceiver[source]¶

Get ServiceBusReceiver for the specific subscription under the topic.

Parameters

topic_name (str) – The name of specific Service Bus Topic the client connects to.
subscription_name (str) – The name of specific Service Bus Subscription under the given Service Bus Topic.

Keyword Arguments

session_id (Union[str, NEXT_AVAILABLE_SESSION]) – A specific session from which to receive. This must be specified for a sessionful subscription, otherwise it must be None. In order to receive messages from the next available session, set this to ~azure.servicebus.NEXT_AVAILABLE_SESSION.
str]] sub_queue (Optional[Union[ServiceBusSubQueue,) – If specified, the subqueue this receiver will connect to. This includes the DEAD_LETTER and TRANSFER_DEAD_LETTER queues, holds messages that can’t be delivered to any receiver or messages that can’t be processed. The default is None, meaning connect to the primary queue. Can be assigned values from ServiceBusSubQueue enum or equivalent string values “deadletter” and “transferdeadletter”.
receive_mode (Union[ServiceBusReceiveMode, str]) – The mode with which messages will be retrieved from the entity. The two options are PEEK_LOCK and RECEIVE_AND_DELETE. Messages received with PEEK_LOCK must be settled within a given lock period before they will be removed from the subscription. Messages received with RECEIVE_AND_DELETE will be immediately removed from the subscription, and cannot be subsequently rejected or re-received if the client fails to process the message. The default mode is PEEK_LOCK.
max_wait_time (Optional[float]) – The timeout in seconds between received messages after which the receiver will automatically stop receiving. The default value is None, meaning no timeout.
auto_lock_renewer (Optional[AutoLockRenewer]) – An ~azure.servicebus.aio.AutoLockRenewer can be provided such that messages are automatically registered on receipt. If the receiver is a session receiver, it will apply to the session instead.
prefetch_count (int) – The maximum number of messages to cache with each request to the service. This setting is only for advanced performance tuning. Increasing this value will improve message throughput performance but increase the chance that messages will expire while they are cached if they’re not processed fast enough. The default value is 0, meaning messages will be received from the service and processed one at a time. In the case of prefetch_count being 0, ServiceBusReceiver.receive would try to cache max_message_count (if provided) within its request to the service.

Return type

ServiceBusReceiver

Example:

Create a new instance of the ServiceBusReceiver from ServiceBusClient.¶

import os
from azure.servicebus.aio import ServiceBusClient
servicebus_connection_str = os.environ['SERVICE_BUS_CONNECTION_STR']
topic_name = os.environ["SERVICE_BUS_TOPIC_NAME"]
subscription_name = os.environ["SERVICE_BUS_SUBSCRIPTION_NAME"]
servicebus_client = ServiceBusClient.from_connection_string(conn_str=servicebus_connection_str)
async with servicebus_client:
    subscription_receiver = servicebus_client.get_subscription_receiver(
        topic_name=topic_name,
        subscription_name=subscription_name,
    )

get_topic_sender(topic_name: str, **kwargs: Any) → azure.servicebus.aio._servicebus_sender_async.ServiceBusSender[source]¶

Get ServiceBusSender for the specific topic.

Parameters: topic_name (str) – The path of specific Service Bus Topic the client connects to.
Return type: ServiceBusSender

Example:

Create a new instance of the ServiceBusSender from ServiceBusClient.¶

import os
from azure.servicebus.aio import ServiceBusClient
servicebus_connection_str = os.environ['SERVICE_BUS_CONNECTION_STR']
topic_name = os.environ['SERVICE_BUS_TOPIC_NAME']
servicebus_client = ServiceBusClient.from_connection_string(conn_str=servicebus_connection_str)
async with servicebus_client:
    topic_sender = servicebus_client.get_topic_sender(topic_name=topic_name)

class azure.servicebus.aio.ServiceBusSender(fully_qualified_namespace: str, credential: TokenCredential, **kwargs: Any)[source]¶

The ServiceBusSender class defines a high level interface for sending messages to the Azure Service Bus Queue or Topic.

Please use the `get_<queue/topic>_sender` method of ~azure.servicebus.aio.ServiceBusClient to create a ServiceBusSender instance.

Variables

fully_qualified_namespace (str) – The fully qualified host name for the Service Bus namespace. The namespace format is: <yournamespace>.servicebus.windows.net.
entity_name (str) – The name of the entity that the client connects to.

Parameters

fully_qualified_namespace (str) – The fully qualified host name for the Service Bus namespace. The namespace format is: <yournamespace>.servicebus.windows.net.
credential (TokenCredential) – The credential object used for authentication which implements a particular interface for getting tokens. It accepts :class: credential objects generated by the azure-identity library and objects that implement the get_token(self, *scopes) method.

Keyword Arguments

queue_name (str) – The path of specific Service Bus Queue the client connects to. Only one of queue_name or topic_name can be provided.
topic_name (str) – The path of specific Service Bus Topic the client connects to. Only one of queue_name or topic_name can be provided.
logging_enable (bool) – Whether to output network trace logs to the logger. Default is False.
transport_type (TransportType) – The type of transport protocol that will be used for communicating with the Service Bus service. Default is TransportType.Amqp.
http_proxy (dict) – HTTP proxy settings. This must be a dictionary with the following keys: ‘proxy_hostname’ (str value) and ‘proxy_port’ (int value). Additionally the following keys may also be present: ‘username’, ‘password’.
user_agent (str) – If specified, this will be added in front of the built-in user agent string.

async cancel_scheduled_messages(sequence_numbers: Union[int, List[int]], **kwargs: Any) → None [source]¶

Cancel one or more messages that have previously been scheduled and are still pending.

Parameters: sequence_numbers (int or list[int]) – The sequence numbers of the scheduled messages.
Keyword Arguments: timeout (float) – The total operation timeout in seconds including all the retries. The value must be greater than 0 if specified. The default value is None, meaning no timeout.
Return type: None
Raises: ~azure.servicebus.exceptions.ServiceBusError if messages cancellation failed due to message already cancelled or enqueued.

Example:

Cancelling messages scheduled to be sent in future¶

async with servicebus_sender:
    await servicebus_sender.cancel_scheduled_messages(sequence_nums)

async close() → None ¶

Close down the handler connection.

If the handler has already closed, this operation will do nothing. An optional exception can be passed in to indicate that the handler was shutdown due to error.

Return type: None

async create_message_batch(max_size_in_bytes: Optional[int] = None) → azure.servicebus._common.message.ServiceBusMessageBatch[source]¶

Create a ServiceBusMessageBatch object with the max size of all content being constrained by max_size_in_bytes. The max_size should be no greater than the max allowed message size defined by the service.

Parameters: max_size_in_bytes (Optional[int]) – The maximum size of bytes data that a ServiceBusMessageBatch object can hold. By default, the value is determined by your Service Bus tier.
Return type: ServiceBusMessageBatch

Example:

Create ServiceBusMessageBatch object within limited size¶

async with servicebus_sender:
    batch_message = await servicebus_sender.create_message_batch()
    batch_message.add_message(ServiceBusMessage("Single message inside batch"))

async schedule_messages(messages: Union[azure.servicebus._common.message.ServiceBusMessage, List[azure.servicebus._common.message.ServiceBusMessage]], schedule_time_utc: datetime.datetime, **kwargs: Any) → List[int][source]¶

Send Message or multiple Messages to be enqueued at a specific time by the service. Returns a list of the sequence numbers of the enqueued messages.

Parameters

messages (ServiceBusMessage or list[ServiceBusMessage]) – The message or list of messages to schedule.
schedule_time_utc (datetime) – The utc date and time to enqueue the messages.

Keyword Arguments

timeout (float) – The total operation timeout in seconds including all the retries. The value must be greater than 0 if specified. The default value is None, meaning no timeout.

Return type

list[int]

Example:

Schedule a message to be sent in future¶

async with servicebus_sender:
    scheduled_time_utc = datetime.datetime.utcnow() + datetime.timedelta(seconds=30)
    scheduled_messages = [ServiceBusMessage("Scheduled message") for _ in range(10)]
    sequence_nums = await servicebus_sender.schedule_messages(scheduled_messages, scheduled_time_utc)

async send_messages(message: Union[azure.servicebus._common.message.ServiceBusMessage, azure.servicebus._common.message.ServiceBusMessageBatch, List[azure.servicebus._common.message.ServiceBusMessage]], **kwargs: Any) → None [source]¶

Sends message and blocks until acknowledgement is received or operation times out.

If a list of messages was provided, attempts to send them as a single batch, throwing a ValueError if they cannot fit in a single batch.

Parameters

message (Union[ServiceBusMessage,ServiceBusMessageBatch, list[ServiceBusMessage]]) – The ServiceBus message to be sent.

Keyword Arguments

timeout (Optional[float]) – The total operation timeout in seconds including all the retries. The value must be greater than 0 if specified. The default value is None, meaning no timeout.

Return type

None

Raises

class: ~azure.servicebus.exceptions.OperationTimeoutError if sending times out.
class: ~azure.servicebus.exceptions.MessageSizeExceededError if the size of the message is over service bus frame size limit.
class: ~azure.servicebus.exceptions.ServiceBusError when other errors happen such as connection error, authentication error, and any unexpected errors. It’s also the top-level root class of above errors.

Example:

Send message.¶

async with servicebus_sender:
    message = ServiceBusMessage("Hello World")
    await servicebus_sender.send_messages(message)

class azure.servicebus.aio.ServiceBusReceiver(fully_qualified_namespace: str, credential: TokenCredential, **kwargs: Any)[source]¶

The ServiceBusReceiver class defines a high level interface for receiving messages from the Azure Service Bus Queue or Topic Subscription.

The two primary channels for message receipt are receive() to make a single request for messages, and async for message in receiver: to continuously receive incoming messages in an ongoing fashion.

Please use the `get_<queue/subscription>_receiver` method of ~azure.servicebus.aio.ServiceBusClient to create a ServiceBusReceiver instance.

Variables

fully_qualified_namespace (str) – The fully qualified host name for the Service Bus namespace. The namespace format is: <yournamespace>.servicebus.windows.net.
entity_path (str) – The path of the entity that the client connects to.

Parameters

fully_qualified_namespace (str) – The fully qualified host name for the Service Bus namespace. The namespace format is: <yournamespace>.servicebus.windows.net.
credential (TokenCredential) – The credential object used for authentication which implements a particular interface for getting tokens. It accepts :class: credential objects generated by the azure-identity library and objects that implement the get_token(self, *scopes) method.

Keyword Arguments

queue_name (str) – The path of specific Service Bus Queue the client connects to.
topic_name (str) – The path of specific Service Bus Topic which contains the Subscription the client connects to.
subscription_name (str) – The path of specific Service Bus Subscription under the specified Topic the client connects to.
receive_mode (Union[ServiceBusReceiveMode, str]) – The mode with which messages will be retrieved from the entity. The two options are PEEK_LOCK and RECEIVE_AND_DELETE. Messages received with PEEK_LOCK must be settled within a given lock period before they will be removed from the queue. Messages received with RECEIVE_AND_DELETE will be immediately removed from the queue, and cannot be subsequently abandoned or re-received if the client fails to process the message. The default mode is PEEK_LOCK.
max_wait_time (Optional[float]) – The timeout in seconds between received messages after which the receiver will automatically stop receiving. The default value is None, meaning no timeout.
logging_enable (bool) – Whether to output network trace logs to the logger. Default is False.
transport_type (TransportType) – The type of transport protocol that will be used for communicating with the Service Bus service. Default is TransportType.Amqp.
http_proxy (dict) – HTTP proxy settings. This must be a dictionary with the following keys: ‘proxy_hostname’ (str value) and ‘proxy_port’ (int value). Additionally the following keys may also be present: ‘username’, ‘password’.
user_agent (str) – If specified, this will be added in front of the built-in user agent string.
auto_lock_renewer (Optional[AutoLockRenewer]) – An ~azure.servicebus.aio.AutoLockRenewer can be provided such that messages are automatically registered on receipt. If the receiver is a session receiver, it will apply to the session instead.
prefetch_count (int) – The maximum number of messages to cache with each request to the service. This setting is only for advanced performance tuning. Increasing this value will improve message throughput performance but increase the chance that messages will expire while they are cached if they’re not processed fast enough. The default value is 0, meaning messages will be received from the service and processed one at a time. In the case of prefetch_count being 0, ServiceBusReceiver.receive would try to cache max_message_count (if provided) within its request to the service.

async abandon_message(message)[source]¶

Abandon the message.

This message will be returned to the queue and made available to be received again.

Parameters: message (ServiceBusReceivedMessage) – The received message to be abandoned.
Return type: None
Raises: ~azure.servicebus.exceptions.MessageAlreadySettled if the message has been settled.
Raises: ~azure.servicebus.exceptions.SessionLockLostError if session lock has already expired.
Raises: ~azure.servicebus.exceptions.ServiceBusError when errors happen.

Example:

Abandon a received message.¶

    messages = await servicebus_receiver.receive_messages(max_wait_time=5)
    for message in messages:
        await servicebus_receiver.abandon_message(message)

async close() → None [source]¶

Close down the handler connection.

If the handler has already closed, this operation will do nothing. An optional exception can be passed in to indicate that the handler was shutdown due to error.

Return type: None

async complete_message(message)[source]¶

Complete the message.

This removes the message from the queue.

Parameters: message (ServiceBusReceivedMessage) – The received message to be completed.
Return type: None
Raises: ~azure.servicebus.exceptions.MessageAlreadySettled if the message has been settled.
Raises: ~azure.servicebus.exceptions.SessionLockLostError if session lock has already expired.
Raises: ~azure.servicebus.exceptions.ServiceBusError when errors happen.

Example:

Complete a received message.¶

    messages = await servicebus_receiver.receive_messages(max_wait_time=5)
    for message in messages:
        await servicebus_receiver.complete_message(message)

async dead_letter_message(message, reason=None, error_description=None)[source]¶

Move the message to the Dead Letter queue.

The Dead Letter queue is a sub-queue that can be used to store messages that failed to process correctly, or otherwise require further inspection or processing. The queue can also be configured to send expired messages to the Dead Letter queue.

Parameters

message (ServiceBusReceivedMessage) – The received message to be dead-lettered.
reason (Optional[str]) – The reason for dead-lettering the message.
error_description (Optional[str]) – The detailed error description for dead-lettering the message.

Return type

None

Raises

~azure.servicebus.exceptions.MessageAlreadySettled if the message has been settled.

Raises

~azure.servicebus.exceptions.SessionLockLostError if session lock has already expired.

Raises

~azure.servicebus.exceptions.ServiceBusError when errors happen.

Example:

Dead letter a received message.¶

    messages = await servicebus_receiver.receive_messages(max_wait_time=5)
    for message in messages:
        await servicebus_receiver.dead_letter_message(message)

async defer_message(message)[source]¶

Defers the message.

This message will remain in the queue but must be requested specifically by its sequence number in order to be received.

Parameters: message (ServiceBusReceivedMessage) – The received message to be deferred.
Return type: None
Raises: ~azure.servicebus.exceptions.MessageAlreadySettled if the message has been settled.
Raises: ~azure.servicebus.exceptions.SessionLockLostError if session lock has already expired.
Raises: ~azure.servicebus.exceptions.ServiceBusError when errors happen.

Example:

Defer a received message.¶

    messages = await servicebus_receiver.receive_messages(max_wait_time=5)
    for message in messages:
        await servicebus_receiver.defer_message(message)

async peek_messages(max_message_count: int = 1, **kwargs: Any) → List[azure.servicebus._common.message.ServiceBusReceivedMessage][source]¶

Browse messages currently pending in the queue.

Peeked messages are not removed from queue, nor are they locked. They cannot be completed, deferred or dead-lettered.

Parameters

max_message_count (int) – The maximum number of messages to try and peek. The default value is 1.

Keyword Arguments

sequence_number (int) – A message sequence number from which to start browsing messages.
timeout (Optional[float]) – The total operation timeout in seconds including all the retries. The value must be greater than 0 if specified. The default value is None, meaning no timeout.

Return type

list[ServiceBusReceivedMessage]

Example:

Peek messages in the queue.¶

async with servicebus_receiver:
    messages = await servicebus_receiver.peek_messages()
    for message in messages:
        print(str(message))

async receive_deferred_messages(sequence_numbers: Union[int, List[int]], **kwargs: Any) → List[azure.servicebus._common.message.ServiceBusReceivedMessage][source]¶

Receive messages that have previously been deferred.

When receiving deferred messages from a partitioned entity, all of the supplied sequence numbers must be messages from the same partition.

Parameters: list[int]] sequence_numbers (Union[int,) – A list of the sequence numbers of messages that have been deferred.
Keyword Arguments: timeout (Optional[float]) – The total operation timeout in seconds including all the retries. The value must be greater than 0 if specified. The default value is None, meaning no timeout.
Return type: list[ServiceBusReceivedMessage]

Example:

Receive deferred messages from ServiceBus.¶

async with servicebus_receiver:
    deferred_sequenced_numbers = []
    messages = await servicebus_receiver.receive_messages(max_wait_time=5)
    for message in messages:
        deferred_sequenced_numbers.append(message.sequence_number)
        print(str(message))
        await servicebus_receiver.defer_message(message)

    received_deferred_msg = await servicebus_receiver.receive_deferred_messages(
        sequence_numbers=deferred_sequenced_numbers
    )

    for message in received_deferred_msg:
        await servicebus_receiver.complete_message(message)

async receive_messages(max_message_count: Optional[int] = 1, max_wait_time: Optional[float] = None) → List[azure.servicebus._common.message.ServiceBusReceivedMessage][source]¶

Receive a batch of messages at once.

This approach is optimal if you wish to process multiple messages simultaneously, or perform an ad-hoc receive as a single call.

Note that the number of messages retrieved in a single batch will be dependent on whether prefetch_count was set for the receiver. If prefetch_count is not set for the receiver, the receiver would try to cache max_message_count (if provided) messages within the request to the service.

This call will prioritize returning quickly over meeting a specified batch size, and so will return as soon as at least one message is received and there is a gap in incoming messages regardless of the specified batch size.

Parameters

max_message_count (Optional[int]) – Maximum number of messages in the batch. Actual number returned will depend on prefetch_count size and incoming stream rate. Setting to None will fully depend on the prefetch config. The default value is 1.
max_wait_time (Optional[float]) – Maximum time to wait in seconds for the first message to arrive. If no messages arrive, and no timeout is specified, this call will not return until the connection is closed. If specified, and no messages arrive within the timeout period, an empty list will be returned.

Return type

list[ServiceBusReceivedMessage]

Example:

Receive messages from ServiceBus.¶

async with servicebus_receiver:
    messages = await servicebus_receiver.receive_messages(max_wait_time=5)
    for message in messages:
        print(str(message))
        await servicebus_receiver.complete_message(message)

async renew_message_lock(message: azure.servicebus._common.message.ServiceBusReceivedMessage, **kwargs: Any) → datetime.datetime [source]¶

Renew the message lock.

This will maintain the lock on the message to ensure it is not returned to the queue to be reprocessed.

In order to complete (or otherwise settle) the message, the lock must be maintained, and cannot already have expired; an expired lock cannot be renewed.

Messages received via RECEIVE_AND_DELETE mode are not locked, and therefore cannot be renewed. This operation is only available for non-sessionful messages as well.

Parameters: message (ServiceBusReceivedMessage) – The message to renew the lock for.
Keyword Arguments: timeout (Optional[float]) – The total operation timeout in seconds including all the retries. The value must be greater than 0 if specified. The default value is None, meaning no timeout.
Returns: The utc datetime the lock is set to expire at.
Return type: datetime.datetime
Raises: TypeError if the message is sessionful.
Raises: ~azure.servicebus.exceptions.MessageAlreadySettled if the message has been settled.
Raises: ~azure.servicebus.exceptions.MessageLockLostError if message lock has already expired.

Example:

Renew the lock on a received message.¶

    messages = await servicebus_receiver.receive_messages(max_wait_time=5)
    for message in messages:
        await servicebus_receiver.renew_message_lock(message)

property session¶

Get the ServiceBusSession object linked with the receiver. Session is only available to session-enabled entities, it would return None if called on a non-sessionful receiver.

Return type: ServiceBusSession

Example:

Get session from a receiver¶

    async with servicebus_client.get_queue_receiver(queue_name=queue_name, session_id=session_id) as receiver:
        session = receiver.session

class azure.servicebus.aio.ServiceBusSession(session_id: str, receiver: Union[ServiceBusReceiver, ServiceBusReceiverAsync])[source]¶

The ServiceBusSession is used for manage session states and lock renewal.

Please use the property `session` on the ServiceBusReceiver to get the corresponding ServiceBusSession object linked with the receiver instead of instantiating a ServiceBusSession object directly.

Example:

Get session from a receiver¶

    async with servicebus_client.get_queue_receiver(queue_name=queue_name, session_id=session_id) as receiver:
        session = receiver.session

async get_state(**kwargs: Any) → bytes [source]¶

Get the session state.

Returns None if no state has been set.

Keyword Arguments: timeout (Optional[float]) – The total operation timeout in seconds including all the retries. The value must be greater than 0 if specified. The default value is None, meaning no timeout.
Return type: str

Example:

Get the session state¶

    async with servicebus_client.get_queue_receiver(queue_name=queue_name, session_id=session_id) as receiver:
        session = receiver.session
        session_state = await session.get_state()

async renew_lock(**kwargs: Any) → datetime.datetime [source]¶

Renew the session lock.

This operation must be performed periodically in order to retain a lock on the session to continue message processing.

Once the lock is lost the connection will be closed; an expired lock cannot be renewed.

This operation can also be performed as a threaded background task by registering the session with an azure.servicebus.aio.AutoLockRenewer instance.

Keyword Arguments: timeout (Optional[float]) – The total operation timeout in seconds including all the retries. The value must be greater than 0 if specified. The default value is None, meaning no timeout.
Returns: The utc datetime the lock is set to expire at.
Return type: datetime

Example:

Renew the session lock before it expires¶

    async with servicebus_client.get_queue_receiver(queue_name=queue_name, session_id=session_id) as receiver:
        session = receiver.session
        await session.renew_lock()

async set_state(state: Union[str, bytes, bytearray], **kwargs: Any) → None [source]¶

Set the session state.

Parameters: state (Union[str, bytes, bytearray]) – The state value.
Keyword Arguments: timeout (Optional[float]) – The total operation timeout in seconds including all the retries. The value must be greater than 0 if specified. The default value is None, meaning no timeout.
Return type: None

Example:

Set the session state¶

    async with servicebus_client.get_queue_receiver(queue_name=queue_name, session_id=session_id) as receiver:
        session = receiver.session
        await session.set_state("START")

property locked_until_utc¶

The time at which this session’s lock will expire.

Return type: datetime.datetime

property session_id¶

Session id of the current session.

Return type: str

class azure.servicebus.aio.AutoLockRenewer(max_lock_renewal_duration: float = 300, on_lock_renew_failure: Optional[Callable[[Union[azure.servicebus.aio._servicebus_session_async.ServiceBusSession, azure.servicebus._common.message.ServiceBusReceivedMessage], Optional[Exception]], Awaitable[None]]] = None, loop: Optional[asyncio.events.AbstractEventLoop] = None)[source]¶

Auto lock renew.

An asynchronous AutoLockRenewer handler for renewing the lock tokens of messages and/or sessions in the background.

Parameters

max_lock_renewal_duration (float) – A time in seconds that locks registered to this renewer should be maintained for. Default value is 300 (5 minutes).
on_lock_renew_failure (Optional[LockRenewFailureCallback]) – A callback may be specified to be called when the lock is lost on the renewable that is being registered. Default value is None (no callback).
loop (Optional[AbstractEventLoop]) – An async event loop.

Example:

Automatically renew a message lock¶

from azure.servicebus.aio import AutoLockRenewer

lock_renewal = AutoLockRenewer()
async with servicebus_receiver:
    async for message in servicebus_receiver:
        lock_renewal.register(servicebus_receiver, message, max_lock_renewal_duration=60)
        await process_message(message)
        await servicebus_receiver.complete_message(message)

Automatically renew a session lock¶

    from azure.servicebus.aio import AutoLockRenewer

    lock_renewal = AutoLockRenewer()
    async 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(receiver, session, max_lock_renewal_duration=120)
        async for message in receiver:
            await process_message(message)
            await receiver.complete_message(message)

async close() → None [source]¶: Cease autorenewal by cancelling any remaining open lock renewal futures.

register(receiver: azure.servicebus.aio._servicebus_receiver_async.ServiceBusReceiver, renewable: Union[azure.servicebus._common.message.ServiceBusReceivedMessage, azure.servicebus.aio._servicebus_session_async.ServiceBusSession], max_lock_renewal_duration: Optional[float] = None, on_lock_renew_failure: Optional[Callable[[Union[azure.servicebus.aio._servicebus_session_async.ServiceBusSession, azure.servicebus._common.message.ServiceBusReceivedMessage], Optional[Exception]], Awaitable[None]]] = None) → None [source]¶

Register a renewable entity for automatic lock renewal.

Parameters

receiver (ServiceBusReceiver) – The ServiceBusReceiver instance that is associated with the message or the session to be auto-lock-renewed.
renewable (Union[ServiceBusReceivedMessage,ServiceBusSession]) – A locked entity that needs to be renewed.
max_lock_renewal_duration (Optional[float]) – A time in seconds that locks registered to this renewer should be maintained for. Default value is 300 (5 minutes).
on_lock_renew_failure (Optional[AsyncLockRenewFailureCallback]) – An async callback may be specified to be called when the lock is lost on the renewable being registered. Default value is None (no callback). :rtype: None

Subpackages¶

azure.servicebus.aio.management package