Package google.cloud.pubsublite.v1

Index

• AdminService (interface)
• CursorService (interface)
• PartitionAssignmentService (interface)
• PublisherService (interface)
• SubscriberService (interface)
• TopicStatsService (interface)
• AttributeValues (message)
• CommitCursorRequest (message)
• CommitCursorResponse (message)
• ComputeHeadCursorRequest (message)
• ComputeHeadCursorResponse (message)
• ComputeMessageStatsRequest (message)
• ComputeMessageStatsResponse (message)
• CreateSubscriptionRequest (message)
• CreateTopicRequest (message)
• Cursor (message)
• DeleteSubscriptionRequest (message)
• DeleteTopicRequest (message)
• FlowControlRequest (message)
• GetSubscriptionRequest (message)
• GetTopicPartitionsRequest (message)
• GetTopicRequest (message)
• InitialCommitCursorRequest (message)
• InitialCommitCursorResponse (message)
• InitialPartitionAssignmentRequest (message)
• InitialPublishRequest (message)
• InitialPublishResponse (message)
• InitialSubscribeRequest (message)
• InitialSubscribeResponse (message)
• ListPartitionCursorsRequest (message)
• ListPartitionCursorsResponse (message)
• ListSubscriptionsRequest (message)
• ListSubscriptionsResponse (message)
• ListTopicSubscriptionsRequest (message)
• ListTopicSubscriptionsResponse (message)
• ListTopicsRequest (message)
• ListTopicsResponse (message)
• MessagePublishRequest (message)
• MessagePublishResponse (message)
• MessageResponse (message)
• PartitionAssignment (message)
• PartitionAssignmentAck (message)
• PartitionAssignmentRequest (message)
• PartitionCursor (message)
• PubSubMessage (message)
• PublishRequest (message)
• PublishResponse (message)
• SeekRequest (message)
• SeekRequest.NamedTarget (enum)
• SeekResponse (message)
• SequencedCommitCursorRequest (message)
• SequencedCommitCursorResponse (message)
• SequencedMessage (message)
• StreamingCommitCursorRequest (message)
• StreamingCommitCursorResponse (message)
• SubscribeRequest (message)
• SubscribeResponse (message)
• Subscription (message)
• Subscription.DeliveryConfig (message)
• Subscription.DeliveryConfig.DeliveryRequirement (enum)
• Topic (message)
• Topic.PartitionConfig (message)
• Topic.PartitionConfig.Capacity (message)
• Topic.RetentionConfig (message)
• TopicPartitions (message)
• UpdateSubscriptionRequest (message)
• UpdateTopicRequest (message)

AdminService

The service that a client application uses to manage topics and subscriptions, such creating, listing, and deleting topics and subscriptions.

CreateSubscription
rpc CreateSubscription(CreateSubscriptionRequest) returns (Subscription) Creates a new subscription. Authorization Scopes Requires the following OAuth scope: https://www.googleapis.com/auth/cloud-platform For more information, see the Authentication Overview.

CreateTopic
rpc CreateTopic(CreateTopicRequest) returns (Topic) Creates a new topic. Authorization Scopes Requires the following OAuth scope: https://www.googleapis.com/auth/cloud-platform For more information, see the Authentication Overview.

DeleteSubscription
rpc DeleteSubscription(DeleteSubscriptionRequest) returns (Empty) Deletes the specified subscription. Authorization Scopes Requires the following OAuth scope: https://www.googleapis.com/auth/cloud-platform For more information, see the Authentication Overview.

DeleteTopic
rpc DeleteTopic(DeleteTopicRequest) returns (Empty) Deletes the specified topic. Authorization Scopes Requires the following OAuth scope: https://www.googleapis.com/auth/cloud-platform For more information, see the Authentication Overview.

GetSubscription
rpc GetSubscription(GetSubscriptionRequest) returns (Subscription) Returns the subscription configuration. Authorization Scopes Requires the following OAuth scope: https://www.googleapis.com/auth/cloud-platform For more information, see the Authentication Overview.

GetTopic
rpc GetTopic(GetTopicRequest) returns (Topic) Returns the topic configuration. Authorization Scopes Requires the following OAuth scope: https://www.googleapis.com/auth/cloud-platform For more information, see the Authentication Overview.

GetTopicPartitions
rpc GetTopicPartitions(GetTopicPartitionsRequest) returns (TopicPartitions) Returns the partition information for the requested topic. Authorization Scopes Requires the following OAuth scope: https://www.googleapis.com/auth/cloud-platform For more information, see the Authentication Overview.

ListSubscriptions
rpc ListSubscriptions(ListSubscriptionsRequest) returns (ListSubscriptionsResponse) Returns the list of subscriptions for the given project. Authorization Scopes Requires the following OAuth scope: https://www.googleapis.com/auth/cloud-platform For more information, see the Authentication Overview.

ListTopicSubscriptions
rpc ListTopicSubscriptions(ListTopicSubscriptionsRequest) returns (ListTopicSubscriptionsResponse) Lists the subscriptions attached to the specified topic. Authorization Scopes Requires the following OAuth scope: https://www.googleapis.com/auth/cloud-platform For more information, see the Authentication Overview.

ListTopics
rpc ListTopics(ListTopicsRequest) returns (ListTopicsResponse) Returns the list of topics for the given project. Authorization Scopes Requires the following OAuth scope: https://www.googleapis.com/auth/cloud-platform For more information, see the Authentication Overview.

UpdateSubscription
rpc UpdateSubscription(UpdateSubscriptionRequest) returns (Subscription) Updates properties of the specified subscription. Authorization Scopes Requires the following OAuth scope: https://www.googleapis.com/auth/cloud-platform For more information, see the Authentication Overview.

UpdateTopic
rpc UpdateTopic(UpdateTopicRequest) returns (Topic) Updates properties of the specified topic. Authorization Scopes Requires the following OAuth scope: https://www.googleapis.com/auth/cloud-platform For more information, see the Authentication Overview.

CursorService

The service that a subscriber client application uses to manage committed cursors while receiving messsages. A cursor represents a subscriber's progress within a topic partition for a given subscription.

CommitCursor
rpc CommitCursor(CommitCursorRequest) returns (CommitCursorResponse) Updates the committed cursor. Authorization Scopes Requires the following OAuth scope: https://www.googleapis.com/auth/cloud-platform For more information, see the Authentication Overview.

ListPartitionCursors
rpc ListPartitionCursors(ListPartitionCursorsRequest) returns (ListPartitionCursorsResponse) Returns all committed cursor information for a subscription. Authorization Scopes Requires the following OAuth scope: https://www.googleapis.com/auth/cloud-platform For more information, see the Authentication Overview.

StreamingCommitCursor
rpc StreamingCommitCursor(StreamingCommitCursorRequest) returns (StreamingCommitCursorResponse) Establishes a stream with the server for managing committed cursors. Authorization Scopes Requires the following OAuth scope: https://www.googleapis.com/auth/cloud-platform For more information, see the Authentication Overview.

PartitionAssignmentService

The service that a subscriber client application uses to determine which partitions it should connect to.

AssignPartitions

rpc AssignPartitions(PartitionAssignmentRequest) returns (PartitionAssignment) Assign partitions for this client to handle for the specified subscription. The client must send an InitialPartitionAssignmentRequest first. The server will then send at most one unacknowledged PartitionAssignment outstanding on the stream at a time. The client should send a PartitionAssignmentAck after updating the partitions it is connected to to reflect the new assignment. Authorization Scopes Requires the following OAuth scope: https://www.googleapis.com/auth/cloud-platform For more information, see the Authentication Overview.

PublisherService

The service that a publisher client application uses to publish messages to topics. Published messages are retained by the service for the duration of the retention period configured for the respective topic, and are delivered to subscriber clients upon request (via the SubscriberService).

Publish

rpc Publish(PublishRequest) returns (PublishResponse) Establishes a stream with the server for publishing messages. Once the stream is initialized, the client publishes messages by sending publish requests on the stream. The server responds with a PublishResponse for each PublishRequest sent by the client, in the same order that the requests were sent. Note that multiple PublishRequests can be in flight simultaneously, but they will be processed by the server in the order that they are sent by the client on a given stream. Authorization Scopes Requires the following OAuth scope: https://www.googleapis.com/auth/cloud-platform For more information, see the Authentication Overview.

SubscriberService

The service that a subscriber client application uses to receive messages from subscriptions.

Subscribe
rpc Subscribe(SubscribeRequest) returns (SubscribeResponse) Establishes a stream with the server for receiving messages. Authorization Scopes Requires the following OAuth scope: https://www.googleapis.com/auth/cloud-platform For more information, see the Authentication Overview.

TopicStatsService

This service allows users to get stats about messages in their topic.

ComputeHeadCursor

rpc ComputeHeadCursor(ComputeHeadCursorRequest) returns (ComputeHeadCursorResponse) Compute the head cursor for the partition. The head cursor's offset is guaranteed to be less than or equal to all messages which have not yet been acknowledged as published, and greater than the offset of any message whose publish has already been acknowledged. It is zero if there have never been messages in the partition. Authorization Scopes Requires the following OAuth scope: https://www.googleapis.com/auth/cloud-platform For more information, see the Authentication Overview.

ComputeMessageStats
rpc ComputeMessageStats(ComputeMessageStatsRequest) returns (ComputeMessageStatsResponse) Compute statistics about a range of messages in a given topic and partition. Authorization Scopes Requires the following OAuth scope: https://www.googleapis.com/auth/cloud-platform For more information, see the Authentication Overview.

AttributeValues

The values associated with a key of an attribute.

Fields
values[]	bytes The list of values associated with a key.

CommitCursorRequest

Request for CommitCursor.

Fields
subscription	string The subscription for which to update the cursor. Authorization requires the following IAM permission on the specified resource subscription: pubsublite.subscriptions.setCursor
partition	int64 The partition for which to update the cursor. Partitions are zero indexed, so partition must be in the range [0, topic.num_partitions).
cursor	Cursor The new value for the committed cursor.

CommitCursorResponse

Response for CommitCursor.

ComputeHeadCursorRequest

Compute the current head cursor for a partition.

Fields
topic	string Required. The topic for which we should compute the head cursor. Authorization requires the following IAM permission on the specified resource topic: pubsublite.topics.computeHeadCursor
partition	int64 Required. The partition for which we should compute the head cursor.

ComputeHeadCursorResponse

Response containing the head cursor for the requested topic and partition.

Fields
head_cursor	Cursor The head cursor.

ComputeMessageStatsRequest

Compute statistics about a range of messages in a given topic and partition.

Fields
topic	string Required. The topic for which we should compute message stats. Authorization requires the following IAM permission on the specified resource topic: pubsublite.topics.computeMessageStats
partition	int64 Required. The partition for which we should compute message stats.
start_cursor	Cursor The inclusive start of the range.
end_cursor	Cursor The exclusive end of the range. The range is empty if end_cursor <= start_cursor. Specifying a start_cursor before the first message and an end_cursor after the last message will retrieve all messages.

ComputeMessageStatsResponse

Response containing stats for messages in the requested topic and partition.

Fields
message_count	int64 The count of messages.
message_bytes	int64 The number of quota bytes accounted to these messages.
minimum_publish_time	Timestamp The minimum publish timestamp across these messages. Note that publish timestamps within a partition are not guaranteed to be non-decreasing. The timestamp will be unset if there are no messages.
minimum_event_time	Timestamp The minimum event timestamp across these messages. For the purposes of this computation, if a message does not have an event time, we use the publish time. The timestamp will be unset if there are no messages.

CreateSubscriptionRequest

Request for CreateSubscription.

Fields
parent	string Required. The parent location in which to create the subscription. Structured like projects/{project_number}/locations/{location}. Authorization requires the following IAM permission on the specified resource parent: pubsublite.subscriptions.create
subscription	Subscription Required. Configuration of the subscription to create. Its name field is ignored. Authorization requires the following IAM permission on the specified resource subscription: pubsublite.topics.subscribe
subscription_id	string Required. The ID to use for the subscription, which will become the final component of the subscription's name. This value is structured like: my-sub-name.
skip_backlog	bool If true, the newly created subscription will only receive messages published after the subscription was created. Otherwise, the entire message backlog will be received on the subscription. Defaults to false.

CreateTopicRequest

Request for CreateTopic.

Fields
parent	string Required. The parent location in which to create the topic. Structured like projects/{project_number}/locations/{location}. Authorization requires the following IAM permission on the specified resource parent: pubsublite.topics.create
topic	Topic Required. Configuration of the topic to create. Its name field is ignored.
topic_id	string Required. The ID to use for the topic, which will become the final component of the topic's name. This value is structured like: my-topic-name.

Cursor

A cursor that describes the position of a message within a topic partition.

Fields
offset	int64 The offset of a message within a topic partition. Must be greater than or equal 0.

DeleteSubscriptionRequest

Request for DeleteSubscription.

Fields
name	string Required. The name of the subscription to delete. Authorization requires the following IAM permission on the specified resource name: pubsublite.subscriptions.delete

DeleteTopicRequest

Request for DeleteTopic.

Fields
name	string Required. The name of the topic to delete. Authorization requires the following IAM permission on the specified resource name: pubsublite.topics.delete

FlowControlRequest

Request to grant tokens to the server, requesting delivery of messages when they become available.

Fields
allowed_messages	int64 The number of message tokens to grant. Must be greater than or equal to 0.
allowed_bytes	int64 The number of byte tokens to grant. Must be greater than or equal to 0.

GetSubscriptionRequest

Request for GetSubscription.

Fields
name	string Required. The name of the subscription whose configuration to return. Authorization requires the following IAM permission on the specified resource name: pubsublite.subscriptions.get

GetTopicPartitionsRequest

Request for GetTopicPartitions.

Fields
name	string Required. The topic whose partition information to return. Authorization requires the following IAM permission on the specified resource name: pubsublite.topics.getPartitions

GetTopicRequest

Request for GetTopic.

Fields
name	string Required. The name of the topic whose configuration to return. Authorization requires the following IAM permission on the specified resource name: pubsublite.topics.get

InitialCommitCursorRequest

The first streaming request that must be sent on a newly-opened stream. The client must wait for the response before sending subsequent requests on the stream.

Fields
subscription	string The subscription for which to manage committed cursors. Authorization requires the following IAM permission on the specified resource subscription: pubsublite.subscriptions.setCursor
partition	int64 The partition for which to manage committed cursors. Partitions are zero indexed, so partition must be in the range [0, topic.num_partitions).

InitialCommitCursorResponse

Response to an InitialCommitCursorRequest.

InitialPartitionAssignmentRequest

The first request that must be sent on a newly-opened stream. The client must wait for the response before sending subsequent requests on the stream.

Fields
subscription	string The subscription name. Structured like: projects//locations//subscriptions/ Authorization requires the following IAM permission on the specified resource subscription: pubsublite.subscriptions.subscribe
client_id	bytes An opaque, unique client identifier. This field must be exactly 16 bytes long and is interpreted as an unsigned 128 bit integer. Other size values will be rejected and the stream will be failed with a non-retryable error. This field is large enough to fit a uuid from standard uuid algorithms like uuid1 or uuid4, which should be used to generate this number. The same identifier should be reused following disconnections with retryable stream errors.

InitialPublishRequest

The first request that must be sent on a newly-opened stream.

Fields
topic	string The topic to which messages will be written. Authorization requires the following IAM permission on the specified resource topic: pubsublite.topics.publish
partition	int64 The partition within the topic to which messages will be written. Partitions are zero indexed, so partition must be in the range [0, topic.num_partitions).

InitialPublishResponse

Response to an InitialPublishRequest.

InitialSubscribeRequest

The first request that must be sent on a newly-opened stream. The client must wait for the response before sending subsequent requests on the stream.

Fields
subscription	string The subscription from which to receive messages. Authorization requires the following IAM permission on the specified resource subscription: pubsublite.subscriptions.subscribe
partition	int64 The partition from which to receive messages. Partitions are zero indexed, so partition must be in the range [0, topic.num_partitions).

InitialSubscribeResponse

Response to an InitialSubscribeRequest.

Fields
cursor	Cursor The cursor from which the subscriber will start receiving messages once flow control tokens become available.

ListPartitionCursorsRequest

Request for ListPartitionCursors.

Fields
parent	string Required. The subscription for which to retrieve cursors. Structured like projects/{project_number}/locations/{location}/subscriptions/{subscription_id}. Authorization requires the following IAM permission on the specified resource parent: pubsublite.subscriptions.getCursor
page_size	int32 The maximum number of cursors to return. The service may return fewer than this value. If unset or zero, all cursors for the parent will be returned.
page_token	string A page token, received from a previous ListPartitionCursors call. Provide this to retrieve the subsequent page. When paginating, all other parameters provided to ListPartitionCursors must match the call that provided the page token.

ListPartitionCursorsResponse

Response for ListPartitionCursors

Fields
partition_cursors[]	PartitionCursor The partition cursors from this request.
next_page_token	string A token, which can be sent as page_token to retrieve the next page. If this field is omitted, there are no subsequent pages.

ListSubscriptionsRequest

Request for ListSubscriptions.

Fields
parent	string Required. The parent whose subscriptions are to be listed. Structured like projects/{project_number}/locations/{location}. Authorization requires the following IAM permission on the specified resource parent: pubsublite.subscriptions.list
page_size	int32 The maximum number of subscriptions to return. The service may return fewer than this value. If unset or zero, all subscriptions for the parent will be returned.
page_token	string A page token, received from a previous ListSubscriptions call. Provide this to retrieve the subsequent page. When paginating, all other parameters provided to ListSubscriptions must match the call that provided the page token.

ListSubscriptionsResponse

Response for ListSubscriptions.

Fields
subscriptions[]	Subscription The list of subscriptions in the requested parent. The order of the subscriptions is unspecified.
next_page_token	string A token that can be sent as page_token to retrieve the next page of results. If this field is omitted, there are no more results.

ListTopicSubscriptionsRequest

Request for ListTopicSubscriptions.

Fields
name	string Required. The name of the topic whose subscriptions to list. Authorization requires the following IAM permission on the specified resource name: pubsublite.topics.listSubscriptions
page_size	int32 The maximum number of subscriptions to return. The service may return fewer than this value. If unset or zero, all subscriptions for the given topic will be returned.
page_token	string A page token, received from a previous ListTopicSubscriptions call. Provide this to retrieve the subsequent page. When paginating, all other parameters provided to ListTopicSubscriptions must match the call that provided the page token.

ListTopicSubscriptionsResponse

Response for ListTopicSubscriptions.

Fields
subscriptions[]	string The names of subscriptions attached to the topic. The order of the subscriptions is unspecified.
next_page_token	string A token that can be sent as page_token to retrieve the next page of results. If this field is omitted, there are no more results.

ListTopicsRequest

Request for ListTopics.

Fields
parent	string Required. The parent whose topics are to be listed. Structured like projects/{project_number}/locations/{location}. Authorization requires the following IAM permission on the specified resource parent: pubsublite.topics.list
page_size	int32 The maximum number of topics to return. The service may return fewer than this value. If unset or zero, all topics for the parent will be returned.
page_token	string A page token, received from a previous ListTopics call. Provide this to retrieve the subsequent page. When paginating, all other parameters provided to ListTopics must match the call that provided the page token.

ListTopicsResponse

Response for ListTopics.

Fields
topics[]	Topic The list of topic in the requested parent. The order of the topics is unspecified.
next_page_token	string A token that can be sent as page_token to retrieve the next page of results. If this field is omitted, there are no more results.

MessagePublishRequest

Request to publish messages to the topic.

Fields
messages[]	PubSubMessage The messages to publish.

MessagePublishResponse

Response to a MessagePublishRequest.

Fields
start_cursor	Cursor The cursor of the first published message in the batch. The cursors for any remaining messages in the batch are guaranteed to be sequential.

MessageResponse

Response containing a list of messages. Upon delivering a MessageResponse to the client, the server: * Updates the stream's delivery cursor to one greater than the cursor of the last message in the list. * Subtracts the total number of bytes and messages from the tokens available to the server.

Fields
messages[]	SequencedMessage Messages from the topic partition.

PartitionAssignment

PartitionAssignments should not race with acknowledgements. There should be exactly one unacknowledged PartitionAssignment at a time. If not, the client must break the stream.

Fields
partitions[]	int64 The list of partition numbers this subscriber is assigned to.

PartitionAssignmentAck

Acknowledge receipt and handling of the previous assignment. If not sent within a short period after receiving the assignment, partitions may remain unassigned for a period of time until the client is known to be inactive, after which time the server will break the stream.

PartitionAssignmentRequest

A request on the PartitionAssignment stream.

Fields
Union field request. The type of request this is. request can be only one of the following:
initial	InitialPartitionAssignmentRequest Initial request on the stream.
ack	PartitionAssignmentAck Acknowledgement of a partition assignment.

PartitionCursor

A pair of a Cursor and the partition it is for.

Fields
partition	int64 The partition this is for.
cursor	Cursor The value of the cursor.

PubSubMessage

A message that is published by publishers and delivered to subscribers.

Fields
key	bytes The key used for routing messages to partitions or for compaction (e.g., keep the last N messages per key). If the key is empty, the message is routed to an arbitrary partition.
data	bytes The payload of the message.
attributes	map<string, AttributeValues> Optional attributes that can be used for message metadata/headers.
event_time	Timestamp An optional, user-specified event time.

PublishRequest

Request sent from the client to the server on a stream.

Fields
Union field request_type. The type of request this is. request_type can be only one of the following:
initial_request	InitialPublishRequest Initial request on the stream.
message_publish_request	MessagePublishRequest Request to publish messages.

PublishResponse

Response to a PublishRequest.

Fields
Union field response_type. The type of response this is. response_type can be only one of the following:
initial_response	InitialPublishResponse Initial response on the stream.
message_response	MessagePublishResponse Response to publishing messages.

SeekRequest

Request to update the stream's delivery cursor based on the given target. Resets the server available tokens to 0. SeekRequests may not be sent while another SeekRequest is outstanding (i.e., has not received a SeekResponse) on the same stream. SeekRequests past head result in stream breakage.

Fields
Union field target. The target to seek to. Must be set. target can be only one of the following:
named_target	NamedTarget A named target.
cursor	Cursor A target corresponding to the cursor, pointing to anywhere in the topic partition.

NamedTarget

A special target in the partition that takes no other parameters.

Enums
NAMED_TARGET_UNSPECIFIED	Default value. This value is unused.
HEAD	A target corresponding to the most recently published message in the partition.
COMMITTED_CURSOR	A target corresponding to the committed cursor for the given subscription and topic partition.

SeekResponse

Response to a SeekRequest.

Fields
cursor	Cursor The new delivery cursor for the current stream.

SequencedCommitCursorRequest

Streaming request to update the committed cursor. Subsequent SequencedCommitCursorRequests override outstanding ones.

Fields
cursor	Cursor The new value for the committed cursor.

SequencedCommitCursorResponse

Response to a SequencedCommitCursorRequest.

Fields
acknowledged_commits	int64 The number of outstanding SequencedCommitCursorRequests acknowledged by this response. Note that SequencedCommitCursorRequests are acknowledged in the order that they are received.

SequencedMessage

A message that has been stored and sequenced by the Pub/Sub Lite system.

Fields
cursor	Cursor The position of a message within the partition where it is stored.
publish_time	Timestamp The time when the message was received by the server when it was first published.
message	PubSubMessage The user message.
size_bytes	int64 The size in bytes of this message for flow control and quota purposes.

StreamingCommitCursorRequest

A request sent from the client to the server on a stream.

Fields
Union field request. The type of request this is. request can be only one of the following:
initial	InitialCommitCursorRequest Initial request on the stream.
commit	SequencedCommitCursorRequest Request to commit a new cursor value.

StreamingCommitCursorResponse

Response to a StreamingCommitCursorRequest.

Fields
Union field request. The type of request this is. request can be only one of the following:
initial	InitialCommitCursorResponse Initial response on the stream.
commit	SequencedCommitCursorResponse Response to committing a new cursor value.

SubscribeRequest

A request sent from the client to the server on a stream.

Fields
Union field request. The type of request this is. request can be only one of the following:
initial	InitialSubscribeRequest Initial request on the stream.
seek	SeekRequest Request to update the stream's delivery cursor.
flow_control	FlowControlRequest Request to grant tokens to the server,

SubscribeResponse

Response to SubscribeRequest.

Fields
Union field response. The type of response this is. response can be only one of the following:
initial	InitialSubscribeResponse Initial response on the stream.
seek	SeekResponse Response to a Seek operation.
messages	MessageResponse Response containing messages from the topic partition.

Subscription

Metadata about a subscription resource.

Fields
name	string The name of the subscription. Structured like: projects/{project_number}/locations/{location}/subscriptions/{subscription_id}
topic	string The name of the topic this subscription is attached to. Structured like: projects/{project_number}/locations/{location}/topics/{topic_id}
delivery_config	DeliveryConfig The settings for this subscription's message delivery.

DeliveryConfig

The settings for a subscription's message delivery.

Fields
delivery_requirement	DeliveryRequirement The DeliveryRequirement for this subscription.

DeliveryRequirement

When this subscription should send messages to subscribers relative to messages persistence in storage. For details, see Creating Lite subscriptions.

Enums
DELIVERY_REQUIREMENT_UNSPECIFIED	Default value. This value is unused.
DELIVER_IMMEDIATELY	The server does not wait for a published message to be successfully written to storage before delivering it to subscribers.
DELIVER_AFTER_STORED	The server will not deliver a published message to subscribers until the message has been successfully written to storage. This will result in higher end-to-end latency, but consistent delivery.

Topic

Metadata about a topic resource.

Fields
name	string The name of the topic. Structured like: projects/{project_number}/locations/{location}/topics/{topic_id}
partition_config	PartitionConfig The settings for this topic's partitions.
retention_config	RetentionConfig The settings for this topic's message retention.

PartitionConfig

The settings for a topic's partitions.

Fields
count	int64 The number of partitions in the topic. Must be at least 1. Once a topic has been created the number of partitions can be increased but not decreased. Message ordering is not guaranteed across a topic resize. For more information see https://cloud.google.com/pubsub/lite/docs/topics#scaling_capacity
Union field dimension. The throughput dimension of this topic. dimension can be only one of the following:
scale (deprecated)	int32 This item is deprecated! DEPRECATED: Use capacity instead which can express a superset of configurations. Every partition in the topic is allocated throughput equivalent to scale times the standard partition throughput (4 MiB/s). This is also reflected in the cost of this topic; a topic with scale of 2 and count of 10 is charged for 20 partitions. This value must be in the range [1,4].
capacity	Capacity The capacity configuration.

Capacity

The throughput capacity configuration for each partition.

Fields
publish_mib_per_sec	int32 Publish throughput capacity per partition in MiB/s. Must be >= 4 and <= 16.
subscribe_mib_per_sec	int32 Subscribe throughput capacity per partition in MiB/s. Must be >= 4 and <= 32.

RetentionConfig

The settings for a topic's message retention.

Fields
per_partition_bytes	int64 The provisioned storage, in bytes, per partition. If the number of bytes stored in any of the topic's partitions grows beyond this value, older messages will be dropped to make room for newer ones, regardless of the value of period.
period	Duration How long a published message is retained. If unset, messages will be retained as long as the bytes retained for each partition is below per_partition_bytes.

TopicPartitions

Response for GetTopicPartitions.

Fields
partition_count	int64 The number of partitions in the topic.

UpdateSubscriptionRequest

Request for UpdateSubscription.

Fields
subscription	Subscription Required. The subscription to update. Its name field must be populated. Topic field must not be populated. Authorization requires the following IAM permission on the specified resource subscription: pubsublite.subscriptions.update
update_mask	FieldMask Required. A mask specifying the subscription fields to change.

UpdateTopicRequest

Request for UpdateTopic.

Fields
topic	Topic Required. The topic to update. Its name field must be populated. Authorization requires the following IAM permission on the specified resource topic: pubsublite.topics.update
update_mask	FieldMask Required. A mask specifying the topic fields to change.