Async-logger-trace

Enqueue a trace-level record through the async logger. This is the convenience wrapper for log(Level::Trace, ...).

Interface

pub async fn[S] AsyncLogger::trace(
  self : AsyncLogger[S],
  message : String,
  fields~ : Array[@bitlogger.Field] = [],
) -> Unit {}

input

• self : AsyncLogger[S] - Async logger that should receive the trace record.
• message : String - Trace message text.
• fields : Array[Field] - Optional structured fields added to the record.

output

• Unit - No return value. The record is handled according to logger state and policy.

Explanation

Detailed rules explaining key parameters and behaviors

• This helper delegates to log(Level::Trace, ..., fields=fields).
• The record is still subject to min-level gating, patching, filtering, and overflow policy.
• This helper does not accept a per-call target override. It uses the logger's stored target unless the logger was derived earlier with with_target(...) or child(...).
• Trace records are often skipped in production because they are the lowest built-in severity.
• Use this helper when explicit trace intent is clearer than a raw log(...) call.

How to Use

Here are some specific examples provided.

When Need Fine-grained Async Diagnostics

When low-level execution flow should be observable during debugging:

logger.trace("entered reconciliation step")

In this example, the call site makes trace intent explicit.

When Attach Structured Trace Data

When a trace event should carry extra fields:

logger.trace(
  "cache probe",
  fields=[@bitlogger.field("key", "user:42")],
)

In this example, the record stays lightweight while still carrying structured detail.

Error Case

e.g.:

• If the logger minimum level is above Trace, the record is skipped before enqueue.

• If the logger is closed or overflow policy prevents acceptance, the write may not become a normal queued record.

Notes

1. Prefer this helper when trace intent is more readable than log(Level::Trace, ...).

2. Use log(...) instead when one trace call needs a one-off target override.

3. Trace-level async logging can increase queue pressure quickly under verbose workloads.