pub enum TimestampContext<T> {
TimelineTimestamp {
timeline: Timeline,
chosen_ts: T,
oracle_ts: Option<T>,
},
NoTimestamp,
}Expand description
The timeline and timestamp context of a read.
Variants§
TimelineTimestamp
Read is executed in a specific timeline with a specific timestamp.
Fields
§
chosen_ts: TThe timestamp that was chosen for a read. This can differ from the
oracle_ts when collections are not readable at the (linearized)
timestamp for the oracle. In those cases (when the chosen timestamp
is further ahead than the oracle timestamp) we have to delay
returning peek results until the timestamp oracle is also
sufficiently advanced.
NoTimestamp
Read is execute without a timeline or timestamp.
Implementations§
Source§impl<T: TimestampManipulation> TimestampContext<T>
impl<T: TimestampManipulation> TimestampContext<T>
Sourcepub fn from_timeline_context(
chosen_ts: T,
oracle_ts: Option<T>,
transaction_timeline: Option<Timeline>,
timeline_context: &TimelineContext,
) -> TimestampContext<T>
pub fn from_timeline_context( chosen_ts: T, oracle_ts: Option<T>, transaction_timeline: Option<Timeline>, timeline_context: &TimelineContext, ) -> TimestampContext<T>
Creates a TimestampContext from a timestamp and TimelineContext.
Sourcepub fn timeline(&self) -> Option<&Timeline>
pub fn timeline(&self) -> Option<&Timeline>
The timeline belonging to this context, if one exists.
Sourcepub fn timeline_timestamp(&self) -> Option<(&Timeline, &T)>
pub fn timeline_timestamp(&self) -> Option<(&Timeline, &T)>
The timeline and timestamp belonging to this context, if one exists.
Sourcepub fn timestamp_or_default(&self) -> T
pub fn timestamp_or_default(&self) -> T
The timestamp belonging to this context, or a sensible default if one does not exists.
Sourcepub fn contains_timestamp(&self) -> bool
pub fn contains_timestamp(&self) -> bool
Whether or not the context contains a timestamp.
Trait Implementations§
Source§impl<T: Clone> Clone for TimestampContext<T>
impl<T: Clone> Clone for TimestampContext<T>
Source§fn clone(&self) -> TimestampContext<T>
fn clone(&self) -> TimestampContext<T>
Returns a duplicate of the value. Read more
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source. Read moreSource§impl<T: Debug> Debug for TimestampContext<T>
impl<T: Debug> Debug for TimestampContext<T>
Source§impl<'de, T> Deserialize<'de> for TimestampContext<T>where
T: Deserialize<'de>,
impl<'de, T> Deserialize<'de> for TimestampContext<T>where
T: Deserialize<'de>,
Source§fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where
__D: Deserializer<'de>,
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where
__D: Deserializer<'de>,
Deserialize this value from the given Serde deserializer. Read more
Source§impl<T: PartialEq> PartialEq for TimestampContext<T>
impl<T: PartialEq> PartialEq for TimestampContext<T>
Source§impl<T> Serialize for TimestampContext<T>where
T: Serialize,
impl<T> Serialize for TimestampContext<T>where
T: Serialize,
impl<T> StructuralPartialEq for TimestampContext<T>
Auto Trait Implementations§
impl<T> Freeze for TimestampContext<T>where
T: Freeze,
impl<T> RefUnwindSafe for TimestampContext<T>where
T: RefUnwindSafe,
impl<T> Send for TimestampContext<T>where
T: Send,
impl<T> Sync for TimestampContext<T>where
T: Sync,
impl<T> Unpin for TimestampContext<T>where
T: Unpin,
impl<T> UnwindSafe for TimestampContext<T>where
T: UnwindSafe,
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