Enum TransactionError

pub enum TransactionError<C, P>
where
    C: Error,
    P: Error,
{
    ReadOnly,
    Conflict,
    Discard,
    LargeTxn,
    Pwm(P),
    Cm(C),
}

Error type for the transaction.

Variants

ReadOnly

Returned if an update function is called on a read-only transaction.

Conflict

Returned when a transaction conflicts with another transaction. This can happen if the read rows had been updated concurrently by another transaction.

Discard

Returned if a previously discarded transaction is re-used.

LargeTxn

Returned if too many writes are fit into a single transaction.

Pwm(P)

Returned if the transaction manager error occurs.

Cm(C)

Returned if the conflict manager error occurs.

Implementations

impl<C, P> TransactionError<C, P>

where C: Error, P: Error,

pub const fn conflict(err: C) -> TransactionError<C, P>

Create a new error from the database error.

pub const fn pending(err: P) -> TransactionError<C, P>

Create a new error from the transaction error.

Trait Implementations

impl<C, P> Clone for TransactionError<C, P>

where C: Clone + Error, P: Clone + Error,

fn clone(&self) -> TransactionError<C, P>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<C, P> Debug for TransactionError<C, P>

where C: Debug + Error, P: Debug + Error,

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

Formats the value using the given formatter.

impl<C, P> Display for TransactionError<C, P>

where C: Error + Display, P: Error + Display,

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

Formats the value using the given formatter.

impl<C, P> Error for TransactionError<C, P>

where C: Error, P: Error, TransactionError<C, P>: Debug + Display,

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<C, P, E> From<TransactionError<C, P>> for WtmError<C, P, E>

where C: Error, P: Error, E: Error,

fn from(err: TransactionError<C, P>) -> WtmError<C, P, E>

Converts to this type from the input type.

impl<C, P> Hash for TransactionError<C, P>

where C: Hash + Error, P: Hash + Error,

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<C, P> PartialEq for TransactionError<C, P>

where C: PartialEq + Error, P: PartialEq + Error,

fn eq(&self, other: &TransactionError<C, P>) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<C, P> Eq for TransactionError<C, P>

where C: Eq + Error, P: Eq + Error,

impl<C, P> StructuralPartialEq for TransactionError<C, P>

where C: Error, P: Error,