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loopdb: enable logging

Previous code in log.go assumed there would by sub system level
enable/disable for loop. This is not yet in place, so converting to same
style as used in the lndclient package.
Joost Jager 1 year ago
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1 changed files with 12 additions and 35 deletions
  1. +12

+ 12
- 35
loopdb/log.go View File

@ -1,44 +1,21 @@
package loopdb
import (
// log is a logger that is initialized with no output filters. This means
// the package will not perform any logging by default until the caller
// requests it.
var log btclog.Logger
// The default amount of logging is none.
func init() {
// DisableLog disables all library log output. Logging output is disabled
// by default until either UseLogger or SetLogWriter are called.
func DisableLog() {
log = btclog.Disabled
// UseLogger uses a specified Logger to output package logging info.
// This should be used in preference to SetLogWriter if the caller is also
// using btclog.
func UseLogger(logger btclog.Logger) {
log = logger
// logClosure is used to provide a closure over expensive logging operations so
// don't have to be performed when the logging level doesn't warrant it.
type logClosure func() string
var (
backendLog = btclog.NewBackend(logWriter{})
log = backendLog.Logger("STORE")
// String invokes the underlying function and returns the result.
func (c logClosure) String() string {
return c()
// logWriter implements an io.Writer that outputs to both standard output and
// the write-end pipe of an initialized log rotator.
type logWriter struct{}
// newLogClosure returns a new closure over a function that returns a string
// which itself provides a Stringer interface so that it can be used with the
// logging system.
func newLogClosure(c func() string) logClosure {
return logClosure(c)
func (logWriter) Write(p []byte) (n int, err error) {
return len(p), nil