1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161

use async_trait::async_trait;

#[cfg(feature = "mysql")]
use crate::connector::MysqlUrl;
#[cfg(feature = "postgresql")]
use crate::connector::PostgresUrl;

use crate::{
    ast,
    connector::{self, Queryable, TransactionCapable, DBIO},
    error::Error,
};
use mobc::{Manager, Connection as MobcPooled};

/// A connection from the pool. Implements
/// [Queryable](connector/trait.Queryable.html).
pub struct PooledConnection {
    pub(crate) inner: MobcPooled<QuaintManager>,
}

impl TransactionCapable for PooledConnection {}

impl Queryable for PooledConnection {
    fn execute<'a>(&'a self, q: ast::Query<'a>) -> DBIO<'a, Option<ast::Id>> {
        self.inner.execute(q)
    }

    fn query<'a>(&'a self, q: ast::Query<'a>) -> DBIO<'a, connector::ResultSet> {
        self.inner.query(q)
    }

    fn query_raw<'a>(&'a self, sql: &'a str, params: &'a [ast::ParameterizedValue]) -> DBIO<'a, connector::ResultSet> {
        self.inner.query_raw(sql, params)
    }

    fn execute_raw<'a>(&'a self, sql: &'a str, params: &'a [ast::ParameterizedValue]) -> DBIO<'a, u64> {
        self.inner.execute_raw(sql, params)
    }

    fn raw_cmd<'a>(&'a self, cmd: &'a str) -> DBIO<'a, ()> {
        self.inner.raw_cmd(cmd)
    }
}

#[doc(hidden)]
pub enum QuaintManager {
    #[cfg(feature = "mysql")]
    Mysql(MysqlUrl),

    #[cfg(feature = "postgresql")]
    Postgres(PostgresUrl),

    #[cfg(feature = "sqlite")]
    Sqlite { file_path: String, db_name: String },
}

#[async_trait]
impl Manager for QuaintManager {
    type Connection = Box<dyn Queryable + Send + Sync>;
    type Error = Error;

    async fn connect(&self) -> crate::Result<Self::Connection> {
        match self {
            #[cfg(feature = "sqlite")]
            QuaintManager::Sqlite { file_path, db_name } => {
                use crate::connector::Sqlite;

                let mut conn = Sqlite::new(&file_path)?;
                conn.attach_database(db_name)?;

                Ok(Box::new(conn) as Self::Connection)
            }

            #[cfg(feature = "mysql")]
            QuaintManager::Mysql(url) => {
                use crate::connector::Mysql;
                Ok(Box::new(Mysql::new(url.clone())?) as Self::Connection)
            }

            #[cfg(feature = "postgresql")]
            QuaintManager::Postgres(url) => {
                use crate::connector::PostgreSql;
                Ok(Box::new(PostgreSql::new(url.clone()).await?) as Self::Connection)
            }
        }
    }

    async fn check(&self, conn: Self::Connection) -> crate::Result<Self::Connection> {
        conn.raw_cmd("SELECT 1").await?;
        Ok(conn)
    }
}

#[cfg(test)]
mod tests {
    use crate::pooled::Quaint;

    #[tokio::test]
    #[cfg(feature = "mysql")]
    async fn mysql_default_connection_limit() {
        let conn_string = std::env::var("TEST_MYSQL").expect("TEST_MYSQL connection string not set.");

        let pool = Quaint::new(&conn_string).await.unwrap();

        assert_eq!(num_cpus::get_physical() * 2 + 1, pool.capacity().await as usize);
    }

    #[tokio::test]
    #[cfg(feature = "mysql")]
    async fn mysql_custom_connection_limit() {
        let conn_string = format!(
            "{}?connection_limit=10",
            std::env::var("TEST_MYSQL").expect("TEST_MYSQL connection string not set.")
        );

        let pool = Quaint::new(&conn_string).await.unwrap();

        assert_eq!(10, pool.capacity().await as usize);
    }

    #[tokio::test]
    #[cfg(feature = "postgresql")]
    async fn psql_default_connection_limit() {
        let conn_string = std::env::var("TEST_PSQL").expect("TEST_PSQL connection string not set.");

        let pool = Quaint::new(&conn_string).await.unwrap();

        assert_eq!(num_cpus::get_physical() * 2 + 1, pool.capacity().await as usize);
    }

    #[tokio::test]
    #[cfg(feature = "postgresql")]
    async fn psql_custom_connection_limit() {
        let conn_string = format!(
            "{}?connection_limit=10",
            std::env::var("TEST_PSQL").expect("TEST_PSQL connection string not set.")
        );

        let pool = Quaint::new(&conn_string).await.unwrap();

        assert_eq!(10, pool.capacity().await as usize);
    }

    #[tokio::test]
    #[cfg(feature = "sqlite")]
    async fn test_default_connection_limit() {
        let conn_string = format!("file:db/test.db",);
        let pool = Quaint::new(&conn_string).await.unwrap();

        assert_eq!(num_cpus::get_physical() * 2 + 1, pool.capacity().await as usize);
    }

    #[tokio::test]
    #[cfg(feature = "sqlite")]
    async fn test_custom_connection_limit() {
        let conn_string = format!("file:db/test.db?connection_limit=10",);
        let pool = Quaint::new(&conn_string).await.unwrap();

        assert_eq!(10, pool.capacity().await as usize);
    }
}