pub struct RoleStateBuilder { /* private fields */ }Expand description
Folds the records of one role into a RoleState.
The builder keeps the record of the highest offset for every key, which is what log compaction keeps. A later registration for a member replaces the earlier one and moves the member to the tail of the roster. A registration tombstone removes the member. A lease tombstone clears the lease.
The builder ignores a record of another role, so a caller folds a partition that holds several roles without a filter of its own.
Implementations§
Source§impl RoleStateBuilder
impl RoleStateBuilder
Sourcepub fn apply(
&mut self,
offset: i64,
key: CoordinationKey,
record: CoordinationRecord,
)
pub fn apply( &mut self, offset: i64, key: CoordinationKey, record: CoordinationRecord, )
Applies one record of the coordination partition.
The key carries the identity, because the key is the compaction key. The
builder takes the member from key and not from the registration value,
and it takes the record kind from key too. It ignores a value whose
kind does not match the kind of the key. decode_value reads the kind
from the key, so a decoder cannot produce such a pair.
Trait Implementations§
Source§impl Clone for RoleStateBuilder
impl Clone for RoleStateBuilder
Source§fn clone(&self) -> RoleStateBuilder
fn clone(&self) -> RoleStateBuilder
1.0.0 (const: unstable) · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source. Read moreAuto Trait Implementations§
impl Freeze for RoleStateBuilder
impl RefUnwindSafe for RoleStateBuilder
impl Send for RoleStateBuilder
impl Sync for RoleStateBuilder
impl Unpin for RoleStateBuilder
impl UnsafeUnpin for RoleStateBuilder
impl UnwindSafe for RoleStateBuilder
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