6e3be7f3d5
This fix updates vendor with `go dep` Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
63 lines
1.5 KiB
Go
63 lines
1.5 KiB
Go
package zipkintracer
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import (
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"errors"
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"fmt"
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"log"
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"strings"
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)
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// ErrMissingValue adds a Missing Value Error when the Logging Parameters are
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// not even in number
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var ErrMissingValue = errors.New("(MISSING)")
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// Logger interface used by this package.
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// This means that we accept Go kit Log compatible loggers
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type Logger interface {
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Log(keyvals ...interface{}) error
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}
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// NewNopLogger provides a Logger that discards all Log data sent to it.
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func NewNopLogger() Logger {
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return &nopLogger{}
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}
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// LogWrapper wraps a standard library logger into a Logger compatible with this
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// package.
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func LogWrapper(l *log.Logger) Logger {
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return &wrappedLogger{l: l}
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}
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// wrappedLogger implements Logger
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type wrappedLogger struct {
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l *log.Logger
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}
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// Log implements Logger
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func (l *wrappedLogger) Log(k ...interface{}) error {
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if len(k)%2 == 1 {
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k = append(k, ErrMissingValue)
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}
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o := make([]string, len(k)/2)
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for i := 0; i < len(k); i += 2 {
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o[i/2] = fmt.Sprintf("%s=%q", k[i], k[i+1])
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}
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l.l.Println(strings.Join(o, " "))
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return nil
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}
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// nopLogger implements Logger
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type nopLogger struct{}
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// Log implements Logger
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func (*nopLogger) Log(_ ...interface{}) error { return nil }
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// LoggerFunc is an adapter to allow use of ordinary functions as Loggers. If
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// f is a function with the appropriate signature, LoggerFunc(f) is a Logger
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// object that calls f.
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type LoggerFunc func(...interface{}) error
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// Log implements Logger by calling f(keyvals...).
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func (f LoggerFunc) Log(keyvals ...interface{}) error {
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return f(keyvals...)
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}
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