BitLogger/docs/api/runtime-sink-file-state.md

name, group, category, update-time, description, key-word

name	group	category	update-time	description	key-word
runtime-sink-file-state	api	runtime	20260707	Read the current file sink snapshot from a RuntimeSink, with a compatibility fallback for non-file sinks.	runtime sink file public

Runtime-sink-file-state

Read the current file sink snapshot from a RuntimeSink. This helper exposes path, availability, policy flags, rotation config, and failure counters as one object.

The returned FileSinkState value is owned by src/file_model; this method belongs to the runtime facade layer and reads file snapshots through src/runtime over file-backed variants that ultimately use src/file_runtime.FileSink.

file_state() is the compatibility form. For truthful file-semantics detection, prefer file_state_or_none().

Interface

pub fn RuntimeSink::file_state(self : RuntimeSink) -> FileSinkState {

input

• self : RuntimeSink - Runtime sink whose file state snapshot should be inspected.

output

• FileSinkState - Current file sink snapshot.

Explanation

Detailed rules explaining key parameters and behaviors

• Plain File runtime variants return a live snapshot from the wrapped FileSink.
• QueuedFile runtime variants forward the snapshot from the wrapped inner FileSink.
• The returned snapshot object itself is the shared @file_model.FileSinkState model, not a runtime-owned concrete type.
• Non-file runtime variants return a fallback empty-style state with path="", available=false, append=false, auto_flush=false, rotation=None, and all failure counters set to 0.
• This fallback keeps older callers source-compatible, but it is not a live file-backed snapshot.
• New diagnostic or recovery code should prefer file_state_or_none().
• This helper is broader than individual file counters or policy accessors because it aggregates core file status into one read.

How to Use

Here are some specific examples provided.

When Need A Full File Health Snapshot

When diagnostics should inspect direct runtime file state as one object:

let state = sink.file_state()

In this example, callers receive a single file-state snapshot instead of querying each property separately.

When Need To Export File Runtime Diagnostics

When a support path should serialize current file state:

println(stringify_file_sink_state(sink.file_state(), pretty=true))

In this example, the runtime sink snapshot can be exported directly through existing JSON helpers.

Error Case

e.g.:

• If the runtime sink is not file-backed, the returned snapshot is a fallback empty-style state rather than a live file view.

• If callers need a truthful file-semantics check, use file_state_or_none().

• If callers also need queue context for queued file sinks, file_runtime_state() is the richer API.

Notes

1. Use this helper for the main one-shot file status snapshot.

2. Prefer file_state_or_none() or file_runtime_state() when broader truthful diagnostics are needed.