import * as pulumi from "@pulumi/pulumi";
/**
 * Creates a snapshot from the requested subscription. 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. 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.
 * Auto-naming is currently not supported for this resource.
 */
export declare class Snapshot extends pulumi.CustomResource {
    /**
     * Get an existing Snapshot resource's state with the given name, ID, and optional extra
     * properties used to qualify the lookup.
     *
     * @param name The _unique_ name of the resulting resource.
     * @param id The _unique_ provider ID of the resource to lookup.
     * @param opts Optional settings to control the behavior of the CustomResource.
     */
    static get(name: string, id: pulumi.Input<pulumi.ID>, opts?: pulumi.CustomResourceOptions): Snapshot;
    /**
     * Returns true if the given object is an instance of Snapshot.  This is designed to work even
     * when multiple copies of the Pulumi SDK have been loaded into the same process.
     */
    static isInstance(obj: any): obj is Snapshot;
    /**
     * Optional. The snapshot is guaranteed to exist up until this time. A newly-created snapshot expires no later than 7 days from the time of its creation. Its exact lifetime is determined at creation by the existing backlog in the source subscription. Specifically, the lifetime of the snapshot is `7 days - (age of oldest unacked message in the subscription)`. For example, consider a subscription whose oldest unacked message is 3 days old. If a snapshot is created from this subscription, the snapshot -- which will always capture this 3-day-old backlog as long as the snapshot exists -- will expire in 4 days. The service will refuse to create a snapshot that would expire in less than 1 hour after creation.
     */
    readonly expireTime: pulumi.Output<string>;
    /**
     * Optional. See [Creating and managing labels] (https://cloud.google.com/pubsub/docs/labels).
     */
    readonly labels: pulumi.Output<{
        [key: string]: string;
    }>;
    /**
     * Optional. The name of the snapshot.
     */
    readonly name: pulumi.Output<string>;
    readonly project: pulumi.Output<string>;
    readonly snapshotId: pulumi.Output<string>;
    /**
     * Optional. The name of the topic from which this snapshot is retaining messages.
     */
    readonly topic: pulumi.Output<string>;
    /**
     * Create a Snapshot resource with the given unique name, arguments, and options.
     *
     * @param name The _unique_ name of the resource.
     * @param args The arguments to use to populate this resource's properties.
     * @param opts A bag of options that control this resource's behavior.
     */
    constructor(name: string, args: SnapshotArgs, opts?: pulumi.CustomResourceOptions);
}
/**
 * The set of arguments for constructing a Snapshot resource.
 */
export interface SnapshotArgs {
    /**
     * Optional. See [Creating and managing labels](https://cloud.google.com/pubsub/docs/labels).
     */
    labels?: pulumi.Input<{
        [key: string]: pulumi.Input<string>;
    }>;
    project?: pulumi.Input<string>;
    snapshotId: pulumi.Input<string>;
    /**
     * The subscription whose backlog the snapshot retains. Specifically, the created snapshot is guaranteed to retain: (a) The existing backlog on the subscription. More precisely, this is defined as the messages in the subscription's backlog that are unacknowledged upon the successful completion of the `CreateSnapshot` request; as well as: (b) Any messages published to the subscription's topic following the successful completion of the CreateSnapshot request. Format is `projects/{project}/subscriptions/{sub}`.
     */
    subscription: pulumi.Input<string>;
}