112 lines
3.1 KiB
Rust
112 lines
3.1 KiB
Rust
#[cfg(feature = "nightly")]
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use crate::syn::TransactionClient;
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use crate::syn::{ConnectionClient, PersistencePool};
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pub use r2d2::{Pool, PooledConnection};
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pub use r2d2_postgres::postgres;
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pub use r2d2_postgres::PostgresConnectionManager as Manager;
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/// Inner connection of r2d2 implementation.
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pub type InnerConn<M> = PooledConnection<M>;
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/// Inner transaction of postgres.
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#[cfg(feature = "nightly")]
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pub type InnerTrx<'t> = postgres::Transaction<'t>;
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/// Alias for r2d2 postgres no tls manager.
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pub type NoTlsManager = Manager<postgres::NoTls>;
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/// Alias for r2d2 postgres no tls persistence.
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pub type NoTlsPersistence<'p> = Persistence<'p, NoTlsManager>;
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/// Alias for r2d2 postgres no tls connection.
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pub type NoTlsConnection = Connection<NoTlsManager>;
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/// Alias for r2d2 postgres no tls inner connection.
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pub type NoTlsInnerConn = InnerConn<NoTlsManager>;
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/// Alias for r2d2 postgres no tls pool.
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pub type NoTlsPool = Pool<NoTlsManager>;
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/// It creates new persistence of r2d2 postgres implementation.
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#[must_use]
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pub fn new<M>(pool: &Pool<M>) -> Persistence<M>
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where
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M: r2d2::ManageConnection,
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{
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Persistence(pool)
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}
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/// Persistence wrap over r2d2 pool.
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#[derive(Clone)]
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pub struct Persistence<'p, M>(&'p Pool<M>)
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where
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M: r2d2::ManageConnection;
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impl PersistencePool for NoTlsPersistence<'_> {
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type Conn = NoTlsConnection;
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fn get_connection(&self) -> crate::Result<Self::Conn> {
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self.0
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.get()
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.map_err(|_| crate::Error::GetConnection)
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.map(Connection)
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}
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}
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/// Connection wrap over r2d2 postgres inner connection.
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pub struct Connection<M>(InnerConn<M>)
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where
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M: r2d2::ManageConnection;
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impl ConnectionClient for NoTlsConnection {
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type InnerConn = NoTlsInnerConn;
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#[cfg(feature = "nightly")]
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type Trx<'t> = Transaction<'t>;
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fn inner(&mut self) -> &mut Self::InnerConn {
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&mut self.0
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}
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#[cfg(feature = "nightly")]
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fn start_transaction(&mut self) -> crate::Result<Self::Trx<'_>> {
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self.0
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.transaction()
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.map_err(|_| crate::Error::UpgradeToTransaction)
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.map(Transaction)
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}
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}
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/// Transaction wrap over postgres transaction.
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///
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/// **Note:** requires nightly rust channel and enabling the `nightly` feature.
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#[cfg(feature = "nightly")]
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pub struct Transaction<'me>(InnerTrx<'me>);
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#[cfg(feature = "nightly")]
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impl<'me> ConnectionClient for Transaction<'me> {
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type InnerConn = InnerTrx<'me>;
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type Trx<'t> = Transaction<'t>;
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fn inner(&mut self) -> &mut Self::InnerConn {
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&mut self.0
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}
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fn start_transaction(&mut self) -> crate::Result<Self::Trx<'_>> {
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self.0
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.transaction()
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.map_err(|_| crate::Error::UpgradeToNestedTransaction)
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.map(Transaction)
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}
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}
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#[cfg(feature = "nightly")]
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impl TransactionClient for Transaction<'_> {
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fn commit(self) -> crate::Result<()> {
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self.0.commit().map_err(|_| crate::Error::CommitTransaction)
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}
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fn rollback(self) -> crate::Result<()> {
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self.0
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.rollback()
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.map_err(|_| crate::Error::RollbackTransaction)
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}
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}
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