Enum PoolConfigError 

pub enum PoolConfigError {
    EmptyUrl,
    ZeroMaxConnections,
    InvalidConnectionRange,
    ZeroAcquireTimeout,
    ZeroConnectTimeout,
}

业务作用：描述公共池参数在任何网络 I/O 前被拒绝的原因。

Variants

EmptyUrl

URL 为空。

ZeroMaxConnections

连接池上限为零。

InvalidConnectionRange

连接池下限超过上限。

ZeroAcquireTimeout

获取连接超时为零。

ZeroConnectTimeout

建连超时为零。

Trait Implementations

impl Clone for PoolConfigError

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for PoolConfigError

impl Debug for PoolConfigError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for PoolConfigError

fn fmt(&self, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for PoolConfigError

impl Error for PoolConfigError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for PoolConfigError

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for PoolConfigError