import * as pulumi from "@pulumi/pulumi";
import * as inputs from "../../types/input";
import * as outputs from "../../types/output";
/**
 * Creates a subscription on a given topic for a given subscriber. 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.
 */
export declare class Subscription extends pulumi.CustomResource {
    /**
     * Get an existing Subscription 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): Subscription;
    /**
     * Returns true if the given object is an instance of Subscription.  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 Subscription;
    /**
     * For either push or pull delivery, the value is the maximum time after a subscriber receives a message before the subscriber should acknowledge or Nack the message. If the Ack deadline for a message passes without an Ack or a Nack, the Pub/Sub system will eventually redeliver the message. If a subscriber acknowledges after the deadline, the Pub/Sub system may accept the Ack, but it is possible that the message has been already delivered again. Multiple Acks to the message are allowed and will succeed. For push delivery, this value is used to set the request timeout for the call to the push endpoint. For pull delivery, this value is used as the initial value for the Ack deadline. It may be overridden for each message using its corresponding ack_id with ModifyAckDeadline. While a message is outstanding (i.e. it has been delivered to a pull subscriber and the subscriber has not yet Acked or Nacked), the Pub/Sub system will not deliver that message to another pull subscriber (on a best-effort basis).
     */
    readonly ackDeadlineSeconds: pulumi.Output<number>;
    /**
     * Name of the subscription.
     */
    readonly name: pulumi.Output<string>;
    /**
     * If push delivery is used with this subscription, this field is used to configure it.
     */
    readonly pushConfig: pulumi.Output<outputs.pubsub.v1beta1a.PushConfigResponse>;
    /**
     * The name of the topic from which this subscription is receiving messages.
     */
    readonly topic: pulumi.Output<string>;
    /**
     * Create a Subscription 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?: SubscriptionArgs, opts?: pulumi.CustomResourceOptions);
}
/**
 * The set of arguments for constructing a Subscription resource.
 */
export interface SubscriptionArgs {
    /**
     * For either push or pull delivery, the value is the maximum time after a subscriber receives a message before the subscriber should acknowledge or Nack the message. If the Ack deadline for a message passes without an Ack or a Nack, the Pub/Sub system will eventually redeliver the message. If a subscriber acknowledges after the deadline, the Pub/Sub system may accept the Ack, but it is possible that the message has been already delivered again. Multiple Acks to the message are allowed and will succeed. For push delivery, this value is used to set the request timeout for the call to the push endpoint. For pull delivery, this value is used as the initial value for the Ack deadline. It may be overridden for each message using its corresponding ack_id with ModifyAckDeadline. While a message is outstanding (i.e. it has been delivered to a pull subscriber and the subscriber has not yet Acked or Nacked), the Pub/Sub system will not deliver that message to another pull subscriber (on a best-effort basis).
     */
    ackDeadlineSeconds?: pulumi.Input<number>;
    /**
     * Name of the subscription.
     */
    name?: pulumi.Input<string>;
    /**
     * If push delivery is used with this subscription, this field is used to configure it.
     */
    pushConfig?: pulumi.Input<inputs.pubsub.v1beta1a.PushConfigArgs>;
    /**
     * The name of the topic from which this subscription is receiving messages.
     */
    topic?: pulumi.Input<string>;
}