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1f69f9eed9
* Remove Subsystems map and replace with RegisterSubSystem * Clean up the logger * Fix LOGFLAGS and make LongFile work correctly * Parallelize the logger backend * More logger cleanup * Initialize and close the logger backend wherever it's needed * Move the location where the backend is closed, also print the log if it panics while writing * Add TestMain to reachability manager tests to preserve the same log level * Fix review comments Co-authored-by: Svarog <feanorr@gmail.com>
45 lines
1.3 KiB
Go
45 lines
1.3 KiB
Go
package logger
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import (
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"fmt"
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"runtime"
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"time"
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)
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// LogAndMeasureExecutionTime logs that `functionName` has
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// started. The user is expected to defer `onEnd`, which
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// will then log that the function has ended, as well as
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// the time duration the function had ran.
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func LogAndMeasureExecutionTime(log *Logger, functionName string) (onEnd func()) {
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start := time.Now()
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log.Debugf("%s start", functionName)
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return func() {
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log.Debugf("%s end. Took: %s", functionName, time.Since(start))
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}
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}
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// LogMemoryStats logs memory stats for `functionName`
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func LogMemoryStats(log *Logger, functionName string) {
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log.Debug(NewLogClosure(func() string {
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stats := runtime.MemStats{}
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runtime.ReadMemStats(&stats)
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return fmt.Sprintf("%s: used memory: %d bytes, total: %d bytes", functionName,
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stats.Alloc, stats.HeapIdle-stats.HeapReleased+stats.HeapInuse)
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}))
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}
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// LogClosure is a closure that can be printed with %s to be used to
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// generate expensive-to-create data for a detailed log level and avoid doing
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// the work if the data isn't printed.
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type LogClosure func() string
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func (c LogClosure) String() string {
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return c()
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}
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// NewLogClosure casts a function to a LogClosure.
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// See LogClosure for details.
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func NewLogClosure(c func() string) LogClosure {
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return c
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}
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