Struct mz_persist_client::cli::args::ReadOnly

struct ReadOnly<T> {
    store: T,
    ignored_write: AtomicBool,
}

Wrap a lower-level service (Blob or Consensus) to make it read only. This is probably not elaborate enough to work in general – folks may expect to read their own writes, among other things – but it should handle the case of GC, where all reads finish before the writes begin.

Fields

store: T

ignored_write: AtomicBool

Implementations

impl<T> ReadOnly<T>

fn new(store: T) -> Self

fn ignored_write(&self) -> bool

fn ignoring_write(&self)

Trait Implementations

impl Blob for ReadOnly<Arc<dyn Blob>>

fn get<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<Option<SegmentedBytes>, ExternalError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Returns a reference to the value corresponding to the key.

fn list_keys_and_metadata<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, key_prefix: &'life1 str, f: &'life2 mut (dyn FnMut(BlobMetadata<'_>) + Send + Sync), ) -> Pin<Box<dyn Future<Output = Result<(), ExternalError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

List all of the keys in the map with metadata about the entry.

fn set<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 str, _value: Bytes, ) -> Pin<Box<dyn Future<Output = Result<(), ExternalError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Inserts a key-value pair into the map.

fn delete<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<Option<usize>, ExternalError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Remove a key from the map.

fn restore<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<(), ExternalError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Restores a previously-deleted key to the map, if possible.

impl Consensus for ReadOnly<Arc<dyn Consensus>>

fn list_keys(&self) -> ResultStream<'_, String>

Returns all the keys ever created in the consensus store.

fn head<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<Option<VersionedData>, ExternalError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Returns a recent version of data, and the corresponding sequence number, if one exists at this location.

fn compare_and_set<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 str, expected: Option<SeqNo>, new: VersionedData, ) -> Pin<Box<dyn Future<Output = Result<CaSResult, ExternalError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Update the VersionedData stored at this location to new, iff the current sequence number is exactly expected and new’s sequence number > the current sequence number.

fn scan<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 str, from: SeqNo, limit: usize, ) -> Pin<Box<dyn Future<Output = Result<Vec<VersionedData>, ExternalError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Return limit versions of data stored for this key at sequence numbers >= from, in ascending order of sequence number.

fn truncate<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 str, seqno: SeqNo, ) -> Pin<Box<dyn Future<Output = Result<usize, ExternalError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Deletes all historical versions of the data stored at key that are < seqno, iff seqno <= the current sequence number.

impl<T: Debug> Debug for ReadOnly<T>

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

Formats the value using the given formatter.