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// Copyright 2025 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//! Google Cloud Client Libraries for Rust - Pub/Sub
//!
//! **WARNING:** this crate is under active development. We expect multiple
//! breaking changes in the upcoming releases. Testing is also incomplete, we do
//! **not** recommend that you use this crate in production. We welcome feedback
//! about the APIs, documentation, missing features, bugs, etc.
//!
//! This crate contains traits, types, and functions to interact with
//! [Pub/Sub]. Most applications will use the structs defined in the
//! [client] module.
//!
//! For administrative operations:
//! * [TopicAdmin][client::TopicAdmin]
//! * [SubscriptionAdmin][client::SubscriptionAdmin]
//! * [SchemaService][client::SchemaService]
//!
//! For publishing messages:
//! * [PublisherFactory][client::PublisherFactory] and [Publisher][client::Publisher]
//!
//! Receiving messages is not yet supported by this crate.
//!
//! **NOTE:** This crate used to contain a different implementation, with a
//! different surface. [@yoshidan](https://github.com/yoshidan) generously
//! donated the crate name to Google. Their crate continues to live as
//! [gcloud-pubsub].
//!
//! [pub/sub]: https://cloud.google.com/pubsub
//! [gcloud-pubsub]: https://crates.io/crates/gcloud-pubsub
pub
pub
pub use Result;
pub use Error;
/// Request and client builders.
/// The messages and enums that are part of this client library.
/// Extends [model] with types that improve type safety and/or ergonomics.
/// Clients to interact with Google Cloud Pub/Sub.
///
/// This module contains the primary entry points for the library, including
/// clients for publishing messages and managing topics and subscriptions.
///
/// # Example: Publishing Messages
///
/// ```
/// # async fn sample() -> anyhow::Result<()> {
/// use google_cloud_pubsub::client::PublisherFactory;
/// use google_cloud_pubsub::model::PubsubMessage;
///
/// // Create a factory for creating publishers.
/// let factory = PublisherFactory::builder().build().await?;
///
/// // Create a publisher that handles batching for a specific topic.
/// let publisher = factory.publisher("projects/my-project/topics/my-topic").build();
///
/// // Publish several messages.
/// // The client will automatically batch them in the background.
/// let mut handles = Vec::new();
/// for i in 0..10 {
/// let msg = PubsubMessage::new().set_data(format!("message {}", i));
/// handles.push(publisher.publish(msg));
/// }
///
/// // The handles are futures that resolve to the server-assigned message IDs.
/// // You can await them to get the results. Messages will still be sent even
/// // if the handles are dropped.
/// for (i, handle) in handles.into_iter().enumerate() {
/// let message_id = handle.await?;
/// println!("Message {} sent with ID: {}", i, message_id);
/// }
/// # Ok(())
/// # }
/// ```
/// Traits to mock the clients in this library.
const DEFAULT_HOST: &str = "https://pubsub.googleapis.com";
pub