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pub mod session; use super::{ClientSession, Database}; use crate::{ bson::Document, concern::{ReadConcern, WriteConcern}, error::Result, options::{ ClientOptions, DatabaseOptions, ListDatabasesOptions, SelectionCriteria, SessionOptions, }, results::DatabaseSpecification, Client as AsyncClient, RUNTIME, }; /// This is the main entry point for the synchronous API. A `Client` is used to connect to a MongoDB /// cluster. By default, it will monitor the topology of the cluster, keeping track of any changes, /// such as servers being added or removed. /// /// `Client` is a wrapper around the asynchronous [`mongodb::Client`](../struct.Client.html), and it /// starts up an async-std runtime internally to run that wrapped client on. /// /// `Client` uses [`std::sync::Arc`](https://doc.rust-lang.org/std/sync/struct.Arc.html) internally, /// so it can safely be shared across threads. For example: /// /// ```rust /// # use mongodb::{bson::Document, sync::Client, error::Result}; /// # /// # fn start_workers() -> Result<()> { /// let client = Client::with_uri_str("mongodb://example.com")?; /// /// for i in 0..5 { /// let client_ref = client.clone(); /// /// std::thread::spawn(move || { /// let collection = client_ref.database("items").collection::<Document>(&format!("coll{}", i)); /// /// // Do something with the collection /// }); /// } /// # /// # // Technically we should join the threads here, but for the purpose of the example, we'll just /// # // sleep for a bit. /// # std::thread::sleep(std::time::Duration::from_secs(3)); /// # Ok(()) /// # } /// ``` /// /// ## TCP Keepalive /// TCP keepalive is enabled by default with ``tcp_keepalive_time`` set to 120 seconds. The /// driver does not set ``tcp_keepalive_intvl``. See the /// [MongoDB Diagnostics FAQ keepalive section](https://docs.mongodb.com/manual/faq/diagnostics/#does-tcp-keepalive-time-affect-mongodb-deployments) /// for instructions on setting these values at the system level. #[derive(Clone, Debug)] pub struct Client { async_client: AsyncClient, } impl From<AsyncClient> for Client { fn from(async_client: AsyncClient) -> Self { Self { async_client } } } impl Client { /// Creates a new `Client` connected to the cluster specified by `uri`. `uri` must be a valid /// MongoDB connection string. /// /// See the documentation on /// [`ClientOptions::parse`](../options/struct.ClientOptions.html#method.parse) for more /// details. pub fn with_uri_str(uri: impl AsRef<str>) -> Result<Self> { let async_client = RUNTIME.block_on(AsyncClient::with_uri_str(uri.as_ref()))?; Ok(Self { async_client }) } /// Creates a new `Client` connected to the cluster specified by `options`. pub fn with_options(options: ClientOptions) -> Result<Self> { let async_client = AsyncClient::with_options(options)?; Ok(Self { async_client }) } /// Gets the default selection criteria the `Client` uses for operations.. pub fn selection_criteria(&self) -> Option<&SelectionCriteria> { self.async_client.selection_criteria() } /// Gets the default read concern the `Client` uses for operations. pub fn read_concern(&self) -> Option<&ReadConcern> { self.async_client.read_concern() } /// Gets the default write concern the `Client` uses for operations. pub fn write_concern(&self) -> Option<&WriteConcern> { self.async_client.write_concern() } /// Gets a handle to a database specified by `name` in the cluster the `Client` is connected to. /// The `Database` options (e.g. read preference and write concern) will default to those of the /// `Client`. /// /// This method does not send or receive anything across the wire to the database, so it can be /// used repeatedly without incurring any costs from I/O. pub fn database(&self, name: &str) -> Database { Database::new(self.async_client.database(name)) } /// Gets a handle to a database specified by `name` in the cluster the `Client` is connected to. /// Operations done with this `Database` will use the options specified by `options` by default /// and will otherwise default to those of the `Client`. /// /// This method does not send or receive anything across the wire to the database, so it can be /// used repeatedly without incurring any costs from I/O. pub fn database_with_options(&self, name: &str, options: DatabaseOptions) -> Database { Database::new(self.async_client.database_with_options(name, options)) } /// Gets information about each database present in the cluster the Client is connected to. pub fn list_databases( &self, filter: impl Into<Option<Document>>, options: impl Into<Option<ListDatabasesOptions>>, ) -> Result<Vec<DatabaseSpecification>> { RUNTIME.block_on( self.async_client .list_databases(filter.into(), options.into()), ) } /// Gets the names of the databases present in the cluster the Client is connected to. pub fn list_database_names( &self, filter: impl Into<Option<Document>>, options: impl Into<Option<ListDatabasesOptions>>, ) -> Result<Vec<String>> { RUNTIME.block_on( self.async_client .list_database_names(filter.into(), options.into()), ) } /// Starts a new `ClientSession`. pub fn start_session(&self, options: Option<SessionOptions>) -> Result<ClientSession> { RUNTIME .block_on(self.async_client.start_session(options)) .map(Into::into) } }