## SubscriptionAdmin

# Struct SubscriptionAdmin

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    pub struct SubscriptionAdmin { /* private fields */ }

Expand description

Implements a client for the Cloud Pub/Sub API.

## §Example

    let client = SubscriptionAdmin::builder().build().await?;
    // use `client` to make requests to the Cloud Pub/Sub API.

## §Service Description

The service that an application uses to manipulate subscriptions.

## §Configuration

To configure `SubscriptionAdmin` use the `with_*` methods in the type returned by builder(). The default configuration should work for most applications. Common configuration changes include

- with_endpoint(): by default this client uses the global default endpoint (`https://pubsub.googleapis.com`). Applications using regional endpoints or running in restricted networks (e.g. a network configured override this default.
- with_credentials(): by default this client uses Application Default Credentials. Applications using custom authentication may need to override this default.

## §Pooling and Cloning

`SubscriptionAdmin` holds a connection pool internally, it is advised to create one and the reuse it. You do not need to wrap `SubscriptionAdmin` in an Rc or Arc to reuse it, because it already uses an `Arc` internally.

## Implementations§

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### impl SubscriptionAdmin

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#### pub fn builder() -> ClientBuilder

Returns a builder for SubscriptionAdmin.

    let client = SubscriptionAdmin::builder().build().await?;

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#### pub fn from_stub<T>(stub: T) -> Self
where T: SubscriptionAdmin + 'static,

Creates a new client from the provided stub.

The most common case for calling this function is in tests mocking the client’s behavior.

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#### pub fn create_subscription(&self) -> CreateSubscription

Creates a subscription to a given topic. See the [resource name rules] (https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names). If the subscription already exists, returns `ALREADY_EXISTS`. If the corresponding topic doesn’t exist, returns `NOT_FOUND`.

If the name is not provided in the request, the server will assign a random name for this subscription on the same project as the topic, conforming to the [resource name format] (https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names). The generated name is populated in the returned Subscription object. Note that for REST API requests, you must specify a name in the request.

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#### pub fn get_subscription(&self) -> GetSubscription

Gets the configuration details of a subscription.

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#### pub fn update_subscription(&self) -> UpdateSubscription

Updates an existing subscription by updating the fields specified in the update mask. Note that certain properties of a subscription, such as its topic, are not modifiable.

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#### pub fn list_subscriptions(&self) -> ListSubscriptions

Lists matching subscriptions.

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#### pub fn delete_subscription(&self) -> DeleteSubscription

Deletes an existing subscription. All messages retained in the subscription are immediately dropped. Calls to `Pull` after deletion will return `NOT_FOUND`. After a subscription is deleted, a new one may be created with the same name, but the new one has no association with the old subscription or its topic unless the same topic is specified.

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#### pub fn modify_push_config(&self) -> ModifyPushConfig

Modifies the `PushConfig` for a specified subscription.

This may be used to change a push subscription to a pull one (signified by an empty `PushConfig`) or vice versa, or change the endpoint URL and other attributes of a push subscription. Messages will accumulate for delivery continuously through the call regardless of changes to the `PushConfig`.

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#### pub fn get_snapshot(&self) -> GetSnapshot

Gets the configuration details of a snapshot. Snapshots are used in Seek operations, which allow you to manage message acknowledgments in bulk. That is, you can set the acknowledgment state of messages in an existing subscription to the state captured by a snapshot.

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#### pub fn list_snapshots(&self) -> ListSnapshots

Lists the existing snapshots. Snapshots are used in Seek operations, which allow you to manage message acknowledgments in bulk. That is, you can set the acknowledgment state of messages in an existing subscription to the state captured by a snapshot.

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#### pub fn create_snapshot(&self) -> CreateSnapshot

Creates a snapshot from the requested subscription. Snapshots are used in Seek operations, which allow you to manage message acknowledgments in bulk. That is, you can set the acknowledgment state of messages in an existing subscription to the state captured by a snapshot. If the snapshot already exists, returns `ALREADY_EXISTS`. If the requested subscription doesn’t exist, returns `NOT_FOUND`. If the backlog in the subscription is too old – and the resulting snapshot would expire in less than 1 hour – then `FAILED_PRECONDITION` is returned. See also the `Snapshot.expire_time` field. If the name is not provided in the request, the server will assign a random name for this snapshot on the same project as the subscription, conforming to the [resource name format] (https://cloud.google.com/pubsub/docs/pubsub-basics#resource_names). The generated name is populated in the returned Snapshot object. Note that for REST API requests, you must specify a name in the request.

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#### pub fn update_snapshot(&self) -> UpdateSnapshot

Updates an existing snapshot by updating the fields specified in the update mask. Snapshots are used in Seek operations, which allow you to manage message acknowledgments in bulk. That is, you can set the acknowledgment state of messages in an existing subscription to the state captured by a snapshot.

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#### pub fn delete_snapshot(&self) -> DeleteSnapshot

Removes an existing snapshot. Snapshots are used in [Seek] (https://cloud.google.com/pubsub/docs/replay-overview) operations, which allow you to manage message acknowledgments in bulk. That is, you can set the acknowledgment state of messages in an existing subscription to the state captured by a snapshot. When the snapshot is deleted, all messages retained in the snapshot are immediately dropped. After a snapshot is deleted, a new one may be created with the same name, but the new one has no association with the old snapshot or its subscription, unless the same subscription is specified.

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#### pub fn seek(&self) -> Seek

Seeks an existing subscription to a point in time or to a given snapshot, whichever is provided in the request. Snapshots are used in [Seek] (https://cloud.google.com/pubsub/docs/replay-overview) operations, which allow you to manage message acknowledgments in bulk. That is, you can set the acknowledgment state of messages in an existing subscription to the state captured by a snapshot. Note that both the subscription and the snapshot must be on the same topic.

## Trait Implementations§

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### impl Clone for SubscriptionAdmin

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#### fn clone(&self) -> SubscriptionAdmin

Returns a duplicate of the value. Read more
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#### fn clone_from(&mut self, source: &Self)

Performs copy-assignment from `source`. Read more
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### impl Debug for SubscriptionAdmin

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#### fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

## Auto Trait Implementations§

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### impl Freeze for SubscriptionAdmin

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### impl !RefUnwindSafe for SubscriptionAdmin

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### impl Send for SubscriptionAdmin

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### impl Sync for SubscriptionAdmin

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### impl Unpin for SubscriptionAdmin

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### impl !UnwindSafe for SubscriptionAdmin

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🔬This is a nightly-only experimental API. (`clone_to_uninit`)
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