btcd/database/log.go
Dave Collins d574a3af6d Import btcdb repo into database directory.
This commit contains the entire btcdb repository along with several
changes needed to move all of the files into the database directory in
order to prepare it for merging.  This does NOT update btcd or any of the
other packages to use the new location as that will be done separately.

- All import paths in the old btcdb test files have been changed to the
  new location
- All references to btcdb as the package name have been chagned to
  database
- The coveralls badge has been removed since it unfortunately doesn't
  support coverage of sub-packages

This is ongoing work toward #214.
2015-01-27 13:15:15 -06:00

64 lines
1.5 KiB
Go

// Copyright (c) 2013-2014 Conformal Systems LLC.
// Use of this source code is governed by an ISC
// license that can be found in the LICENSE file.
package database
import (
"errors"
"io"
"github.com/btcsuite/btclog"
)
// 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()
}
// 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
}
// SetLogWriter uses a specified io.Writer to output package logging info.
// This allows a caller to direct package logging output without needing a
// dependency on seelog. If the caller is also using btclog, UseLogger should
// be used instead.
func SetLogWriter(w io.Writer, level string) error {
if w == nil {
return errors.New("nil writer")
}
lvl, ok := btclog.LogLevelFromString(level)
if !ok {
return errors.New("invalid log level")
}
l, err := btclog.NewLoggerFromWriter(w, lvl)
if err != nil {
return err
}
UseLogger(l)
return nil
}
// GetLog returns the currently active logger.
func GetLog() btclog.Logger {
return log
}