Struct MemoryJournal 

pub struct MemoryJournal { /* private fields */ }

In-memory journal backed by a ring buffer.

Useful for development, testing, and short-lived routers that don’t need persistence across restarts.

Implementations

impl MemoryJournal

pub fn new(capacity: usize) -> Self

Create a new memory journal with the given capacity.

pub fn default_capacity() -> Self

Create with default capacity (10,000 entries)

Trait Implementations

impl Journal for MemoryJournal

fn append<'life0, 'async_trait>( &'life0 self, entry: JournalEntry, ) -> Pin<Box<dyn Future<Output = Result<u64>> + Send + 'async_trait>>

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

Append an entry to the journal. Returns the assigned sequence number.

fn query<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, pattern: &'life1 str, from: Option<u64>, to: Option<u64>, limit: Option<u32>, types: &'life2 [SignalType], ) -> Pin<Box<dyn Future<Output = Result<Vec<JournalEntry>>> + Send + 'async_trait>>

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

Query entries matching a pattern within a time range.

fn since<'life0, 'async_trait>( &'life0 self, seq: u64, limit: Option<u32>, ) -> Pin<Box<dyn Future<Output = Result<Vec<JournalEntry>>> + Send + 'async_trait>>

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

Get entries since a given sequence number.

fn latest_seq<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<u64>> + Send + 'async_trait>>

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

Get the latest sequence number.

fn snapshot<'life0, 'life1, 'async_trait>( &'life0 self, state: &'life1 [ParamSnapshot], ) -> Pin<Box<dyn Future<Output = Result<u64>> + Send + 'async_trait>>

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

Save a state snapshot for faster recovery.

fn load_snapshot<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<Option<Vec<ParamSnapshot>>>> + Send + 'async_trait>>

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

Load the most recent snapshot.

fn compact<'life0, 'async_trait>( &'life0 self, before_seq: u64, ) -> Pin<Box<dyn Future<Output = Result<u64>> + Send + 'async_trait>>

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

Remove entries older than the given sequence number. Returns the number of entries removed.

fn len<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<usize>> + Send + 'async_trait>>

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

Get the total number of entries in the journal.

fn is_empty<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<bool>> + Send + 'async_trait>>

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

Check whether the journal is empty.