51 lines
1.2 KiB
Go
51 lines
1.2 KiB
Go
package logger
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import (
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"errors"
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"go.uber.org/zap"
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"go.uber.org/zap/zapcore"
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)
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// Logger represents a component
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// for writing messages to log.
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//
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// It is a type alias of
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// go.uber.org/zap.Logger.
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type Logger = zap.Logger
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// Prm groups Logger's parameters.
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type Prm struct {
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level zapcore.Level
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}
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// ErrNilLogger is returned by functions that
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// expect a non-nil Logger but received nil.
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var ErrNilLogger = errors.New("logger is nil")
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// SetLevelString sets the minimum logging level.
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//
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// Returns error of s is not a string representation of zap.Level
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// value (see zapcore.Level docs).
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func (p *Prm) SetLevelString(s string) error {
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return p.level.UnmarshalText([]byte(s))
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}
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// NewLogger constructs a new zap logger instance.
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//
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// Logger is built from production logging configuration with:
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// - parameterized level;
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// - console encoding;
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// - ISO8601 time encoding.
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//
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// Logger records a stack trace for all messages at or above fatal level.
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func NewLogger(prm Prm) (*Logger, error) {
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c := zap.NewProductionConfig()
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c.Level = zap.NewAtomicLevelAt(prm.level)
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c.Encoding = "console"
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c.EncoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder
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return c.Build(
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zap.AddStacktrace(zap.NewAtomicLevelAt(zap.FatalLevel)),
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)
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}
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