LOGMINLEVEL: Difference between revisions
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{{PageParameters}} | {{PageParameters}} | ||
* The return value {{Parameter|level&}} is a number from 1 to 5 indicating the current minimum level of logging enabled. The below table indicates the mapping: | * The return value {{Parameter|level&}} is a number from 1 to 5 indicating the current minimum level of logging enabled. The below table indicates the mapping: | ||
┌────────┬─────────────┐ | ┌────────┬─────────────┐ | ||
│ Number │ Log level │ | │ Number │ Log level │ | ||
| Line 23: | Line 22: | ||
│ 5 │ None │ | │ 5 │ None │ | ||
└────────┴─────────────┘ | └────────┴─────────────┘ | ||
| Line 50: | Line 48: | ||
level& = {{Cl|_LOGMINLEVEL}} | level& = {{Cl|_LOGMINLEVEL}} | ||
{{Cl|IF}} level& | {{Cl|IF}} level& < {{Text|2|#F580B1}} {{Cl|THEN}} | ||
' Generate expensive log messages | {{Text|<nowiki>' Generate expensive log messages</nowiki>|#919191}} | ||
_LOGTRACE expensiveLogMessage$ | {{Cl|_LOGTRACE}} expensiveLogMessage$ | ||
{{Cl|END IF}} | {{Cl|END IF}} | ||
{{Cl|END}} | |||
{{CodeEnd}} | {{CodeEnd}} | ||
Revision as of 12:59, 7 December 2024
The _LOGMINLEVEL function returns the current minimum logging level that is being output.
Syntax
- level& = _LOGMINLEVEL
Parameters
- The return value level& is a number from 1 to 5 indicating the current minimum level of logging enabled. The below table indicates the mapping:
┌────────┬─────────────┐
│ Number │ Log level │
├────────┼─────────────┤
│ 1 │ Trace │
├────────┼─────────────┤
│ 2 │ Information │
├────────┼─────────────┤
│ 3 │ Warning │
├────────┼─────────────┤
│ 4 │ Error │
├────────┼─────────────┤
│ 5 │ None │
└────────┴─────────────┘
Description
- The purpose of _LOGMINLEVEL is to allow programs to skip generating expensive logging if that logging would not be output anywhere.
- For example, you may have a very large array of integers that you want to log fairly often - generating the strings of the log messages for that array can slow down your program even if those messages are ultimately never written anywhere. By checking _LOGMINLEVEL before generating those log messages you can avoid that expensive work if it would not be used but also still produce it when you request it.
- If the function returns a 2, that indicates that only logging at the Information level and above is being captured somewhere. If the function returns a 5, that means no logging is being captured anywhere.
Availability
no
v4.0.0
yes
yes
yes
Examples
- Example 1
- Writes a log message at the information level
level& = _LOGMINLEVEL IF level& < 2 THEN ' Generate expensive log messages _LOGTRACE expensiveLogMessage$ END IF END |
See also