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log.go
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log.go
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package log
//go:generate errorgen
import (
"context"
"sync"
"v2ray.com/core/common"
"v2ray.com/core/common/log"
)
// Instance is a log.Handler that handles logs.
type Instance struct {
sync.RWMutex
config *Config
accessLogger log.Handler
errorLogger log.Handler
active bool
}
// New creates a new log.Instance based on the given config.
func New(ctx context.Context, config *Config) (*Instance, error) {
g := &Instance{
config: config,
active: false,
}
log.RegisterHandler(g)
return g, nil
}
func (g *Instance) initAccessLogger() error {
switch g.config.AccessLogType {
case LogType_File:
creator, err := log.CreateFileLogWriter(g.config.AccessLogPath)
if err != nil {
return err
}
g.accessLogger = log.NewLogger(creator)
case LogType_Console:
g.accessLogger = log.NewLogger(log.CreateStdoutLogWriter())
default:
}
return nil
}
func (g *Instance) initErrorLogger() error {
switch g.config.ErrorLogType {
case LogType_File:
creator, err := log.CreateFileLogWriter(g.config.ErrorLogPath)
if err != nil {
return err
}
g.errorLogger = log.NewLogger(creator)
case LogType_Console:
g.errorLogger = log.NewLogger(log.CreateStdoutLogWriter())
default:
}
return nil
}
// Type implements common.HasType.
func (*Instance) Type() interface{} {
return (*Instance)(nil)
}
func (g *Instance) startInternal() error {
g.Lock()
defer g.Unlock()
if g.active {
return nil
}
g.active = true
if err := g.initAccessLogger(); err != nil {
return newError("failed to initialize access logger").Base(err).AtWarning()
}
if err := g.initErrorLogger(); err != nil {
return newError("failed to initialize error logger").Base(err).AtWarning()
}
return nil
}
// Start implements common.Runnable.Start().
func (g *Instance) Start() error {
if err := g.startInternal(); err != nil {
return err
}
newError("Logger started").AtDebug().WriteToLog()
return nil
}
// Handle implements log.Handler.
func (g *Instance) Handle(msg log.Message) {
g.RLock()
defer g.RUnlock()
if !g.active {
return
}
switch msg := msg.(type) {
case *log.AccessMessage:
if g.accessLogger != nil {
g.accessLogger.Handle(msg)
}
case *log.GeneralMessage:
if g.errorLogger != nil && msg.Severity <= g.config.ErrorLogLevel {
g.errorLogger.Handle(msg)
}
default:
// Swallow
}
}
// Close implements common.Closable.Close().
func (g *Instance) Close() error {
newError("Logger closing").AtDebug().WriteToLog()
g.Lock()
defer g.Unlock()
if !g.active {
return nil
}
g.active = false
common.Close(g.accessLogger) // nolint: errcheck
g.accessLogger = nil
common.Close(g.errorLogger) // nolint: errcheck
g.errorLogger = nil
return nil
}
func init() {
common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
return New(ctx, config.(*Config))
}))
}