Struct MemoryLogWriter 

pub struct MemoryLogWriter { /* private fields */ }

In-memory ring buffer for log entries with a configurable capacity.

Once the buffer reaches max_entries the oldest entry is evicted for every new entry written. This is useful for WASM containers and short-lived executions where disk I/O is unavailable or undesirable.

Implementations

impl MemoryLogWriter

pub fn new(max_entries: usize) -> Self

Creates a new ring buffer that holds at most max_entries entries.

pub fn write_entry(&self, entry: LogEntry)

Pushes an entry into the buffer, evicting the oldest entry if the buffer is at capacity.

Panics

Panics if the internal mutex is poisoned.

pub fn write_line(&self, stream: LogStream, message: &str, source: LogSource)

Convenience method that constructs a LogEntry with Utc::now() as the timestamp, then writes it.

pub fn entries(&self) -> Vec<LogEntry>

Returns a clone of all entries currently in the buffer, in chronological order (oldest first).

Panics

Panics if the internal mutex is poisoned.

pub fn tail(&self, n: usize) -> Vec<LogEntry>

Returns the last n entries (or fewer if the buffer holds less).

Panics

Panics if the internal mutex is poisoned.