d0200e7fea
The jsonlog logger currently allows specifying envs and labels that should be propagated to the log message, however there has been no way to read that back. This adds a new API option to enable inserting these attrs back to the log reader. With timestamps, this looks like so: ``` 92016-04-08T15:28:09.835913720Z foo=bar,hello=world hello ``` The extra attrs are comma separated before the log message but after timestamps. Without timestaps it looks like so: ``` foo=bar,hello=world hello ``` Signed-off-by: Brian Goff <cpuguy83@gmail.com>
42 lines
1.2 KiB
Go
42 lines
1.2 KiB
Go
package jsonlog
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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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// JSONLog represents a log message, typically a single entry from a given log stream.
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// JSONLogs can be easily serialized to and from JSON and support custom formatting.
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type JSONLog struct {
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// Log is the log message
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Log string `json:"log,omitempty"`
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// Stream is the log source
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Stream string `json:"stream,omitempty"`
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// Created is the created timestamp of log
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Created time.Time `json:"time"`
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// Attrs is the list of extra attributes provided by the user
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Attrs map[string]string `json:"attrs,omitempty"`
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}
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// Format returns the log formatted according to format
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// If format is nil, returns the log message
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// If format is json, returns the log marshaled in json format
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// By default, returns the log with the log time formatted according to format.
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func (jl *JSONLog) Format(format string) (string, error) {
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if format == "" {
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return jl.Log, nil
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}
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if format == "json" {
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m, err := json.Marshal(jl)
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return string(m), err
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}
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return fmt.Sprintf("%s %s", jl.Created.Format(format), jl.Log), nil
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}
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// Reset resets the log to nil.
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func (jl *JSONLog) Reset() {
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jl.Log = ""
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jl.Stream = ""
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jl.Created = time.Time{}
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}
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