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77 lines
2.1 KiB
Go
77 lines
2.1 KiB
Go
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package logger
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import (
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"io"
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"log"
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"sync/atomic"
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)
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// LogSystem is implemented by log output devices.
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// All methods can be called concurrently from multiple goroutines.
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type LogSystem interface {
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LogPrint(LogMsg)
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}
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// NewStdLogSystem creates a LogSystem that prints to the given writer.
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// The flag values are defined package log.
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func NewStdLogSystem(writer io.Writer, flags int, level LogLevel) *StdLogSystem {
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logger := log.New(writer, "", flags)
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return &StdLogSystem{logger, uint32(level)}
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}
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type StdLogSystem struct {
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logger *log.Logger
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level uint32
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}
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func (t *StdLogSystem) LogPrint(msg LogMsg) {
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stdmsg, ok := msg.(stdMsg)
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if ok {
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if t.GetLogLevel() >= stdmsg.Level() {
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t.logger.Print(stdmsg.String())
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}
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}
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}
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func (t *StdLogSystem) SetLogLevel(i LogLevel) {
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atomic.StoreUint32(&t.level, uint32(i))
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}
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func (t *StdLogSystem) GetLogLevel() LogLevel {
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return LogLevel(atomic.LoadUint32(&t.level))
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}
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// NewJSONLogSystem creates a LogSystem that prints to the given writer without
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// adding extra information irrespective of loglevel only if message is JSON type
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func NewJsonLogSystem(writer io.Writer) LogSystem {
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logger := log.New(writer, "", 0)
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return &jsonLogSystem{logger}
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}
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type jsonLogSystem struct {
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logger *log.Logger
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}
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func (t *jsonLogSystem) LogPrint(msg LogMsg) {
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jsonmsg, ok := msg.(jsonMsg)
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if ok {
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t.logger.Print(jsonmsg.String())
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}
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}
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