Struct persist::mem::MemLog

pub struct MemLog {
    core: Option<Arc<Mutex<MemLogCore>>>,
}

An in-memory implementation of Log.

Fields

core: Option<Arc<Mutex<MemLogCore>>>

Implementations

impl MemLog

pub fn new(lock_info: LockInfo) -> Self

Constructs a new, empty MemLog.

fn open(
    core: Arc<Mutex<MemLogCore>>,
    lock_info: LockInfo
) -> Result<Self, Error>

Open a pre-existing MemLog.

fn core_lock<'c>(&'c self) -> Result<MutexGuard<'c, MemLogCore>, Error>

Trait Implementations

impl Debug for MemLog

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

Formats the value using the given formatter.

impl Drop for MemLog

fn drop(&mut self)

Executes the destructor for this type.

impl Log for MemLog

fn write_sync(&mut self, buf: Vec<u8>) -> Result<SeqNo, Error>

Synchronously appends an entry.

fn snapshot<F>(&self, logic: F) -> Result<Range<SeqNo>, Error> where
    F: FnMut(SeqNo, &[u8]) -> Result<(), Error>, 

Returns a consistent snapshot of all written but not yet truncated entries.

fn truncate(&mut self, upper: SeqNo) -> Result<(), Error>

Removes all entries with a SeqNo strictly less than the given upper bound.

fn close(&mut self) -> Result<bool, Error>

Synchronously closes the log, releasing exclusive-writer locks and causing all future commands to error.