57 lines
1.2 KiB
Go
57 lines
1.2 KiB
Go
// Package log provides debug logging
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package log
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import (
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"encoding/json"
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"fmt"
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"time"
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)
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var (
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// Default buffer size if any
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DefaultSize = 256
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// Default formatter
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DefaultFormat = TextFormat
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)
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// Log is debug log interface for reading and writing logs
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type Log interface {
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// Read reads log entries from the logger
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Read(...ReadOption) ([]Record, error)
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// Write writes records to log
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Write(Record) error
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// Stream log records
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Stream() (Stream, error)
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}
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// Record is log record entry
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type Record struct {
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// Timestamp of logged event
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Timestamp time.Time `json:"timestamp"`
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// Metadata to enrich log record
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Metadata map[string]string `json:"metadata"`
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// Value contains log entry
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Message interface{} `json:"message"`
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}
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// Stream returns a log stream
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type Stream interface {
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Chan() <-chan Record
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Stop() error
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}
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// Format is a function which formats the output
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type FormatFunc func(Record) string
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// TextFormat returns text format
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func TextFormat(r Record) string {
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t := r.Timestamp.Format("2006-01-02 15:04:05")
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return fmt.Sprintf("%s %v", t, r.Message)
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}
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// JSONFormat is a json Format func
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func JSONFormat(r Record) string {
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b, _ := json.Marshal(r)
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return string(b)
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}
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