CheckpointStore Class

CheckpointStore deals with the interaction with the chosen storage service.

It can list and claim partition ownerships as well as list and save checkpoints.

Constructor

CheckpointStore()

Methods

claim_ownership	Tries to claim ownership for a list of specified partitions.
list_checkpoints	List the updated checkpoints from the chosen storage service.
list_ownership	Retrieves a complete ownership list from the chosen storage service.
update_checkpoint	Updates the checkpoint using the given information for the offset, associated partition and consumer group in the chosen storage service. Note: If you plan to implement a custom checkpoint store with the intention of running between cross-language EventHubs SDKs, it is recommended to persist the offset value as an integer.

claim_ownership

Tries to claim ownership for a list of specified partitions.

abstract claim_ownership(ownership_list: Iterable[Dict[str, Any]], **kwargs: Any) -> Iterable[Dict[str, Any]]

Parameters

Name	Description
ownership_list Required	Iterable[Dict[str,Any]] Iterable of dictionaries containing all the ownerships to claim.

Returns

Type

Description

Iterable[Dict[str,Any]], Iterable <xref:of> <xref:dictionaries> <xref:containing> <xref:azure.eventhub.amqp.AmqpMessageBodyType.partition> <xref:ownership> <xref:information>:fully_qualified_namespace (str): <xref:The> <xref:fully> <xref:qualified> <xref:namespace> <xref:that> <xref:the> <xref:Event> <xref:Hub> <xref:belongs> <xref:to.> <xref:The> <xref:azure.eventhub.amqp.AmqpMessageBodyType.format> <xref:is> <xref:like> “<<xref:namespace>><xref:.servicebus.windows.net>”<xref:.> eventhub_name (str): <xref:The> <xref:name> <xref:of> <xref:the> <xref:specific> <xref:Event> <xref:Hub> <xref:the> <xref:checkpoint> <xref:is> <xref:associated> <xref:with>, <xref:relative> <xref:to> <xref:the> <xref:Event> <xref:Hubs> <xref:namespace> <xref:that> <xref:contains> <xref:it.> <xref:consumer_group> (str): <xref:The> <xref:name> <xref:of> <xref:the> <xref:consumer> <xref:group> <xref:the> <xref:ownership> <xref:are> <xref:associated> <xref:with.> <xref:partition_id> (str): <xref:The> <xref:azure.eventhub.amqp.AmqpMessageBodyType.partition> <xref:ID> <xref:which> <xref:the> <xref:checkpoint> <xref:is> <xref:created> <xref:for.> <xref:owner_id> (str): <xref:A> <xref:UUID> <xref:representing> <xref:the> <xref:owner> <xref:attempting> <xref:to> <xref:claim> <xref:this> <xref:partition.> <xref:last_modified_time> (<xref:UTC> datetime): <xref:The> <xref:last> time <xref:this> <xref:ownership> <xref:was> <xref:claimed.> <xref:etag> (str): <xref:The> <xref:Etag> <xref:value> <xref:for> <xref:the> <xref:last> time <xref:this> <xref:ownership> <xref:was> <xref:modified.> Optional <xref:depending> <xref:on> <xref:storage> <xref:implementation.>

list_checkpoints

List the updated checkpoints from the chosen storage service.

abstract list_checkpoints(fully_qualified_namespace: str, eventhub_name: str, consumer_group: str, **kwargs: Any) -> Iterable[Dict[str, Any]]

Parameters

Name	Description
fully_qualified_namespace Required	str The fully qualified namespace that the Event Hub belongs to. The format is like ".servicebus.windows.net".
eventhub_name Required	str The name of the specific Event Hub the checkpoints are associated with, relative to the Event Hubs namespace that contains it.
consumer_group Required	str The name of the consumer group the checkpoints are associated with.

Returns

Type

Description

Iterable[Dict[str,Any]], Iterable <xref:of> <xref:dictionaries> <xref:containing> <xref:azure.eventhub.amqp.AmqpMessageBodyType.partition> <xref:checkpoint> <xref:information>:fully_qualified_namespace (str): <xref:The> <xref:fully> <xref:qualified> <xref:namespace> <xref:that> <xref:the> <xref:Event> <xref:Hub> <xref:belongs> <xref:to.> <xref:The> <xref:azure.eventhub.amqp.AmqpMessageBodyType.format> <xref:is> <xref:like> “<<xref:namespace>><xref:.servicebus.windows.net>”<xref:.> eventhub_name (str): <xref:The> <xref:name> <xref:of> <xref:the> <xref:specific> <xref:Event> <xref:Hub> <xref:the> <xref:checkpoints> <xref:are> <xref:associated> <xref:with>, <xref:relative> <xref:to> <xref:the> <xref:Event> <xref:Hubs> <xref:namespace> <xref:that> <xref:contains> <xref:it.> <xref:consumer_group> (str): <xref:The> <xref:name> <xref:of> <xref:the> <xref:consumer> <xref:group> <xref:the> <xref:checkpoints> <xref:are> <xref:associated> <xref:with.> <xref:partition_id> (str): <xref:The> <xref:azure.eventhub.amqp.AmqpMessageBodyType.partition> <xref:ID> <xref:which> <xref:the> <xref:checkpoint> <xref:is> <xref:created> <xref:for.> sequence_number (int): <xref:The> <xref:sequence> <xref:number> <xref:of> <xref:the> <xref:EventData.> offset (str): <xref:The> offset <xref:of> <xref:the> <xref:EventData.>

list_ownership

Retrieves a complete ownership list from the chosen storage service.

abstract list_ownership(fully_qualified_namespace: str, eventhub_name: str, consumer_group: str, **kwargs: Any) -> Iterable[Dict[str, Any]]

Parameters

Name	Description
fully_qualified_namespace Required	str The fully qualified namespace that the Event Hub belongs to. The format is like ".servicebus.windows.net".
eventhub_name Required	str The name of the specific Event Hub the partition ownerships are associated with, relative to the Event Hubs namespace that contains it.
consumer_group Required	str The name of the consumer group the ownerships are associated with.

Returns

Type

Description

Iterable[Dict[str, Any]], Iterable <xref:of> <xref:dictionaries> <xref:containing> <xref:azure.eventhub.amqp.AmqpMessageBodyType.partition> <xref:ownership> <xref:information>:fully_qualified_namespace (str): <xref:The> <xref:fully> <xref:qualified> <xref:namespace> <xref:that> <xref:the> <xref:Event> <xref:Hub> <xref:belongs> <xref:to.> <xref:The> <xref:azure.eventhub.amqp.AmqpMessageBodyType.format> <xref:is> <xref:like> “<<xref:namespace>><xref:.servicebus.windows.net>”<xref:.> eventhub_name (str): <xref:The> <xref:name> <xref:of> <xref:the> <xref:specific> <xref:Event> <xref:Hub> <xref:the> <xref:checkpoint> <xref:is> <xref:associated> <xref:with>, <xref:relative> <xref:to> <xref:the> <xref:Event> <xref:Hubs> <xref:namespace> <xref:that> <xref:contains> <xref:it.> <xref:consumer_group> (str): <xref:The> <xref:name> <xref:of> <xref:the> <xref:consumer> <xref:group> <xref:the> <xref:ownership> <xref:are> <xref:associated> <xref:with.> <xref:partition_id> (str): <xref:The> <xref:azure.eventhub.amqp.AmqpMessageBodyType.partition> <xref:ID> <xref:which> <xref:the> <xref:checkpoint> <xref:is> <xref:created> <xref:for.> <xref:owner_id> (str): <xref:A> <xref:UUID> <xref:representing> <xref:the> <xref:current> <xref:owner> <xref:of> <xref:this> <xref:partition.> <xref:last_modified_time> (<xref:UTC> datetime): <xref:The> <xref:last> time <xref:this> <xref:ownership> <xref:was> <xref:claimed.> <xref:etag> (str): <xref:The> <xref:Etag> <xref:value> <xref:for> <xref:the> <xref:last> time <xref:this> <xref:ownership> <xref:was> <xref:modified.> Optional <xref:depending> <xref:on> <xref:storage> <xref:implementation.>

update_checkpoint

Updates the checkpoint using the given information for the offset, associated partition and consumer group in the chosen storage service.

Note: If you plan to implement a custom checkpoint store with the intention of running between cross-language EventHubs SDKs, it is recommended to persist the offset value as an integer.

abstract update_checkpoint(checkpoint: Dict[str, str | int | None], **kwargs: Any) -> None

Parameters

Name

Description

checkpoint Required

Dict[str,Any] A dict containing checkpoint information: fully_qualified_namespace (str): The fully qualified namespace that the Event Hub belongs to. The format is like ".servicebus.windows.net". eventhub_name (str): The name of the specific Event Hub the checkpoint is associated with, relative to the Event Hubs namespace that contains it. consumer_group (str): The name of the consumer group the checkpoint is associated with. partition_id (str): The partition ID which the checkpoint is created for. sequence_number (int): The sequence number of the EventData the new checkpoint will be associated with. offset (str): The offset of the EventData the new checkpoint will be associated with.

Returns

Type	Description
None