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forked from cppforlife/bosh-provisioner
/
device.go
81 lines (64 loc) · 1.57 KB
/
device.go
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package eventlog
import (
"encoding/json"
"fmt"
"io"
"strings"
bosherr "github.com/cloudfoundry/bosh-utils/errors"
)
type Device interface {
WriteLogEntry(LogEntry) error
WriteErrorEntry(ErrorEntry) error
}
// JSONDevice writes events as JSON log entries
type JSONDevice struct {
writer io.Writer
}
// TextDevice writes events in user friendly format
type TextDevice struct {
writer io.Writer
}
func NewJSONDevice(writer io.Writer) JSONDevice {
return JSONDevice{writer: writer}
}
func NewTextDevice(writer io.Writer) TextDevice {
return TextDevice{writer: writer}
}
func (d JSONDevice) WriteLogEntry(entry LogEntry) error {
return d.writeEntry(entry)
}
func (d JSONDevice) WriteErrorEntry(entry ErrorEntry) error {
return d.writeEntry(entry)
}
func (d JSONDevice) writeEntry(entry interface{}) error {
bytes, err := json.Marshal(entry)
if err != nil {
return bosherr.WrapError(err, "Marshalling entry")
}
bytes = append(bytes, []byte("\n")...)
_, err = d.writer.Write(bytes)
if err != nil {
return bosherr.WrapError(err, "Writing entry")
}
return nil
}
func (d TextDevice) WriteLogEntry(entry LogEntry) error {
_, err := fmt.Fprintf(
d.writer,
"%s %s > %s\n",
strings.Title(entry.State),
strings.ToLower(entry.Stage),
entry.Task,
)
if err != nil {
return bosherr.WrapError(err, "Writing log entry")
}
return nil
}
func (d TextDevice) WriteErrorEntry(entry ErrorEntry) error {
_, err := fmt.Fprintf(d.writer, "\n-----\nError: %s\n-----\n", entry.Body.Message)
if err != nil {
return bosherr.WrapError(err, "Writing error entry")
}
return nil
}