29 lines
805 B
Go
29 lines
805 B
Go
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package mlog
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import (
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"github.com/mediocregopher/mediocre-go-lib/mcmp"
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)
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type cmpKey int
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// SetLogger sets the given logger onto the Component. The logger can later be
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// retrieved from the Component, or any of its children, using From.
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func SetLogger(cmp *mcmp.Component, l *Logger) {
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cmp.SetValue(cmpKey(0), l)
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}
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// DefaultLogger is an instance of Logger which is returned by From when a
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// Logger hasn't been previously set with SetLogger on the passed in Component.
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var DefaultLogger = NewLogger()
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// From returns the Logger which was set on the Component, or one of its
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// ancestors, using SetLogger. If no Logger was ever set then DefaultLogger is
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// returned.
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func From(cmp *mcmp.Component) *Logger {
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l, _ := cmp.Value(cmpKey(0)).(*Logger)
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if l == nil {
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l = DefaultLogger
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}
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return l
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}
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