1.9 KiB
name, group, category, update-time, description, key-word
| name | group | category | update-time | description | key-word | ||||
|---|---|---|---|---|---|---|---|---|---|
| global-trace | api | global | 20260512 | Emit a trace-level record through the shared default logger shortcut. |
|
Global-trace
Emit a trace-level record through the shared default logger. This is the global convenience wrapper for log(Level::Trace, ...).
Interface
pub fn trace(message : String, fields~ : Array[Field] = []) -> Unit {}
input
message : String- Trace message text.fields : Array[Field]- Optional structured fields attached to the record.
output
Unit- No return value. The record is handled through the shared default logger.
Explanation
Detailed rules explaining key parameters and behaviors
- This helper delegates to
default_logger().trace(...). - Trace is the lowest built-in severity and is commonly disabled unless the shared minimum level is lowered.
- The shared default target and console sink are used.
- This helper favors convenience over explicit per-component logger ownership.
How to Use
Here are some specific examples provided.
When Need Quick Global Trace Output
When a script or small app wants temporary low-level diagnostics:
set_default_min_level(Level::Trace)
trace("entered sync loop")
In this example, the shared global path begins accepting trace records.
When Attach Structured Trace Context
When a global trace event should carry fields:
trace("cache probe", fields=[field("key", "user:42")])
In this example, the global helper still supports structured metadata.
Error Case
e.g.:
-
If the shared minimum level is above
Trace, the record is skipped. -
If you need per-call target control, use an explicit
Loggerinstead of this helper.
Notes
-
Global trace logging is convenient for scripts but easy to overuse in larger systems.
-
This helper always goes through the shared default logger path.