[−][src]Struct reool::instrumentation::StateCounters
Simply tracks the following values:
- number of existing connections
- number of idle connections
- number of in flight connections
- number of reservations
- number of tasks waiting before the lock
This is mostly useful for testing purposes only.
Call the instrumentation
method to create an
Instrumentation
that can be put into a pool.
The logged or printed output might not be accurate
since there are multiple race conditions possible inside
the StateCounters
. This is desired behaviour to not
block threads. So the values you see in the output
might already have changed to something different when
logged.
Methods
impl StateCounters
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pub fn new() -> Self
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Create a new StateCounter
.
This method checks the environment:
- If an env var "PRINT" is set, counter changes will be printed to stdout.
- If an env var "LOG" or "RUST_LOG" is set counter changes will be logged at info level
pub fn with_logging() -> Self
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Log counter changes at info level
pub fn with_printing() -> Self
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Print counter changes to stdout
pub fn state(&self) -> PoolState
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pub fn connections(&self) -> usize
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pub fn idle(&self) -> usize
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pub fn in_flight(&self) -> usize
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pub fn reservations(&self) -> usize
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pub fn pools(&self) -> usize
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pub fn instrumentation(&self) -> StateCountersInstrumentation
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Create the Instrumentation
to be put into the pool to instrument.
Trait Implementations
impl Clone for StateCounters
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fn clone(&self) -> StateCounters
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fn clone_from(&mut self, source: &Self)
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impl Default for StateCounters
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fn default() -> StateCounters
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Auto Trait Implementations
impl Send for StateCounters
impl Sync for StateCounters
impl Unpin for StateCounters
impl UnwindSafe for StateCounters
impl RefUnwindSafe for StateCounters
Blanket Implementations
impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> From<T> for T
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impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
V: MultiLane<T>,