Struct OpLog 

pub struct OpLog<'a> { /* private fields */ }

The log in a store.

Implementations

impl<'a> OpLog<'a>

pub fn new(store: &'a Store) -> Self

pub fn head(&self) -> Result<Option<GitId>>

pub fn append( &self, op: &SignedOp, expected_head: Option<&GitId>, ) -> Result<GitId>

Appends one signed entry. expected_head must be the current head commit (compare-and-swap), so two writers can never interleave.

pub fn read_at(&self, commit: &GitId) -> Result<SignedOp>

pub fn read_all(&self) -> Result<Vec<SignedOp>>

All entries, oldest first.

pub fn read_from(&self, seq: u64) -> Result<Vec<SignedOp>>

The entries from sequence seq on, oldest first. The log is walked from its head, so this costs what it returns, however long the log.