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56 lines
1.1 KiB
56 lines
1.1 KiB
package log
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import (
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"log"
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)
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var (
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// DefaultLogger is default logger.
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DefaultLogger Logger = NewStdLogger(log.Writer())
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)
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// Logger is a logger interface.
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type Logger interface {
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Log(level Level, keyvals ...interface{}) error
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}
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type context struct {
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logs []Logger
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prefix []interface{}
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hasValuer bool
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}
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func (c *context) Log(level Level, keyvals ...interface{}) error {
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kvs := make([]interface{}, 0, len(c.prefix)+len(keyvals))
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kvs = append(kvs, c.prefix...)
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if c.hasValuer {
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bindValues(kvs)
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}
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kvs = append(kvs, keyvals...)
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for _, l := range c.logs {
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if err := l.Log(level, kvs...); err != nil {
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return err
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}
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}
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return nil
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}
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// With with logger fields.
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func With(l Logger, kv ...interface{}) Logger {
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if c, ok := l.(*context); ok {
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kvs := make([]interface{}, 0, len(c.prefix)+len(kv))
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kvs = append(kvs, kv...)
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kvs = append(kvs, c.prefix...)
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return &context{
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logs: c.logs,
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prefix: kvs,
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hasValuer: containsValuer(kvs),
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}
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}
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return &context{logs: []Logger{l}, prefix: kv, hasValuer: containsValuer(kv)}
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}
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// MultiLogger wraps multi logger.
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func MultiLogger(logs ...Logger) Logger {
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return &context{logs: logs}
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}
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