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77 lines
1.6 KiB
77 lines
1.6 KiB
package log
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import (
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"context"
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"log"
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)
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// DefaultLogger is default logger.
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var DefaultLogger = NewStdLogger(log.Writer())
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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 logger struct {
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logger Logger
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prefix []interface{}
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hasValuer bool
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ctx context.Context
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}
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func (c *logger) 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(c.ctx, kvs)
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}
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kvs = append(kvs, keyvals...)
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return c.logger.Log(level, kvs...)
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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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c, ok := l.(*logger)
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if !ok {
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return &logger{logger: l, prefix: kv, hasValuer: containsValuer(kv), ctx: context.Background()}
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}
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kvs := make([]interface{}, 0, len(c.prefix)+len(kv))
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kvs = append(kvs, c.prefix...)
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kvs = append(kvs, kv...)
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return &logger{
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logger: c.logger,
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prefix: kvs,
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hasValuer: containsValuer(kvs),
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ctx: c.ctx,
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}
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}
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// WithContext returns a shallow copy of l with its context changed
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// to ctx. The provided ctx must be non-nil.
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func WithContext(ctx context.Context, l Logger) Logger {
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c, ok := l.(*logger)
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if ok {
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return &logger{
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logger: c.logger,
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prefix: c.prefix,
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hasValuer: c.hasValuer,
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ctx: ctx,
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}
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}
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f, ok := l.(*Filter)
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if ok {
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f.ctx = ctx
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return &Filter{
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ctx: ctx,
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logger: f.logger,
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level: f.level,
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key: f.key,
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value: f.value,
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filter: f.filter,
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}
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}
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return &logger{logger: l, ctx: ctx}
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}
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