Struct mysql::Pool [−][src]
pub struct Pool { /* fields omitted */ }
Expand description
Pool
serves to provide you with a PooledConn
’s.
However you can prepare statements directly on Pool
without
invoking Pool::get_conn
.
Pool
will hold at least min
connections and will create as many as max
connections with possible overhead of one connection per alive thread.
Example of multithreaded Pool
usage:
let opts = get_opts(); let pool = Pool::new(opts).unwrap(); let mut threads = Vec::new(); for _ in 0..100 { let pool = pool.clone(); threads.push(std::thread::spawn(move || { let mut conn = pool.get_conn().unwrap(); let result: u8 = conn.query_first("SELECT 1").unwrap().unwrap(); assert_eq!(result, 1_u8); })); } for t in threads.into_iter() { assert!(t.join().is_ok()); }
For more info on how to work with mysql connection please look at
PooledConn
documentation.
Implementations
Creates new pool with min = 10
and max = 100
.
Same as new
but you can set min
and max
.
A way to turn off connection health check on each call to get_conn
(on by default).
Gives you a PooledConn
.
Pool
will check that connection is alive via
Conn::ping
and will
call Conn::reset
if
necessary.
Will try to get connection for a duration of timeout_ms
milliseconds.
Failure
This function will return Error::DriverError(DriverError::Timeout)
if timeout was
reached while waiting for new connection to become available.
Shortcut for pool.get_conn()?.start_transaction(..)
.
Trait Implementations
Auto Trait Implementations
impl !RefUnwindSafe for Pool
impl !UnwindSafe for Pool
Blanket Implementations
Mutably borrows from an owned value. Read more
fn fmt_binary(self) -> FmtBinary<Self> where
Self: Binary,
fn fmt_binary(self) -> FmtBinary<Self> where
Self: Binary,
Causes self
to use its Binary
implementation when Debug
-formatted.
fn fmt_display(self) -> FmtDisplay<Self> where
Self: Display,
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Self: Display,
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fn fmt_lower_exp(self) -> FmtLowerExp<Self> where
Self: LowerExp,
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Self: LowerExp,
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fn fmt_lower_hex(self) -> FmtLowerHex<Self> where
Self: LowerHex,
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Self: LowerHex,
Causes self
to use its LowerHex
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Debug
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Causes self
to use its Octal
implementation when Debug
-formatted.
fn fmt_pointer(self) -> FmtPointer<Self> where
Self: Pointer,
fn fmt_pointer(self) -> FmtPointer<Self> where
Self: Pointer,
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fn fmt_upper_exp(self) -> FmtUpperExp<Self> where
Self: UpperExp,
fn fmt_upper_exp(self) -> FmtUpperExp<Self> where
Self: UpperExp,
Causes self
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Self: UpperHex,
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Self: UpperHex,
Causes self
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pub fn lift_into(self) -> U
pub fn lift_into(self) -> U
Performs the indexed conversion.
impl<T> Pipe for T where
T: ?Sized,
impl<T> Pipe for T where
T: ?Sized,
Pipes by value. This is generally the method you want to use. Read more
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fn pipe_ref_mut<'a, R>(&'a mut self, func: impl FnOnce(&'a mut Self) -> R) -> R where
R: 'a,
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Self: Borrow<B>,
B: 'a + ?Sized,
R: 'a,
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Self: Borrow<B>,
B: 'a + ?Sized,
R: 'a,
Borrows self
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fn pipe_borrow_mut<'a, B, R>(
&'a mut self,
func: impl FnOnce(&'a mut B) -> R
) -> R where
Self: BorrowMut<B>,
B: 'a + ?Sized,
R: 'a,
fn pipe_borrow_mut<'a, B, R>(
&'a mut self,
func: impl FnOnce(&'a mut B) -> R
) -> R where
Self: BorrowMut<B>,
B: 'a + ?Sized,
R: 'a,
Mutably borrows self
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fn pipe_as_ref<'a, U, R>(&'a self, func: impl FnOnce(&'a U) -> R) -> R where
Self: AsRef<U>,
U: 'a + ?Sized,
R: 'a,
fn pipe_as_ref<'a, U, R>(&'a self, func: impl FnOnce(&'a U) -> R) -> R where
Self: AsRef<U>,
U: 'a + ?Sized,
R: 'a,
Borrows self
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fn pipe_as_mut<'a, U, R>(&'a mut self, func: impl FnOnce(&'a mut U) -> R) -> R where
Self: AsMut<U>,
U: 'a + ?Sized,
R: 'a,
fn pipe_as_mut<'a, U, R>(&'a mut self, func: impl FnOnce(&'a mut U) -> R) -> R where
Self: AsMut<U>,
U: 'a + ?Sized,
R: 'a,
Mutably borrows self
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Self: Deref<Target = T>,
T: 'a + ?Sized,
R: 'a,
fn pipe_deref<'a, T, R>(&'a self, func: impl FnOnce(&'a T) -> R) -> R where
Self: Deref<Target = T>,
T: 'a + ?Sized,
R: 'a,
Borrows self
, then passes self.deref()
into the pipe function.
type Output = T
type Output = T
Should always be Self
fn tap_borrow<B>(self, func: impl FnOnce(&B)) -> Self where
Self: Borrow<B>,
B: ?Sized,
fn tap_borrow<B>(self, func: impl FnOnce(&B)) -> Self where
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fn tap_borrow_mut<B>(self, func: impl FnOnce(&mut B)) -> Self where
Self: BorrowMut<B>,
B: ?Sized,
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B: ?Sized,
Mutable access to the BorrowMut<B>
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fn tap_ref_mut<R>(self, func: impl FnOnce(&mut R)) -> Self where
Self: AsMut<R>,
R: ?Sized,
fn tap_ref_mut<R>(self, func: impl FnOnce(&mut R)) -> Self where
Self: AsMut<R>,
R: ?Sized,
Mutable access to the AsMut<R>
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Calls .tap()
only in debug builds, and is erased in release builds.
fn tap_mut_dbg(self, func: impl FnOnce(&mut Self)) -> Self
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fn tap_borrow_dbg<B>(self, func: impl FnOnce(&B)) -> Self where
Self: Borrow<B>,
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fn tap_borrow_mut_dbg<B>(self, func: impl FnOnce(&mut B)) -> Self where
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fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self where
Self: AsRef<R>,
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fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self where
Self: AsRef<R>,
R: ?Sized,
Calls .tap_ref()
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fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self where
Self: AsMut<R>,
R: ?Sized,
fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self where
Self: AsMut<R>,
R: ?Sized,
Calls .tap_ref_mut()
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pub fn vzip(self) -> V