Golang log4go.Trace函數代碼示例

func (q *queue) housekeeping() {
	defer func() {
		log.Trace("queue[%s] housekeeping done", q.ident())
		q.wg.Done()
	}()

	log.Trace("queue[%s] start housekeeping...", q.ident())

	purgeTick := time.NewTicker(q.purgeInterval)
	defer purgeTick.Stop()

	cursorChkpnt := time.NewTicker(time.Second)
	defer cursorChkpnt.Stop()

	for {
		select {
		case <-purgeTick.C:
			if err := q.Purge(); err != nil {
				log.Error("queue[%s] purge: %s", q.ident(), err)
			}

		case <-cursorChkpnt.C:
			if err := q.cursor.dump(); err != nil {
				log.Error("queue[%s] cursor checkpoint: %s", q.ident(), err)
			}

		case <-q.quit:
			return
		}
	}
}

func (this *controller) RunForever() (err error) {
	log.Info("controller[%s] starting", this.Id())

	if err = this.orchestrator.RegisterActor(this.Id(), this.Bytes()); err != nil {
		return err
	}
	defer this.orchestrator.ResignActor(this.Id())

	if err = manager.Default.Start(); err != nil {
		return
	}
	log.Trace("manager[%s] started", manager.Default.Name())

	go this.runWebServer()

	jobDispatchQuit := make(chan struct{})
	go this.dispatchJobQueues(jobDispatchQuit)

	webhookDispatchQuit := make(chan struct{})
	go this.dispatchWebhooks(webhookDispatchQuit)

	select {
	case <-jobDispatchQuit:
		log.Warn("dispatchJobQueues quit")

	case <-webhookDispatchQuit:
		log.Warn("dispatchWebhooks quit")
	}

	manager.Default.Stop()
	log.Trace("manager[%s] stopped", manager.Default.Name())

	return
}

func (this *pubStore) watchDeadPartitions() {
	ticker := time.NewTicker(time.Minute * 2) // TODO
	defer ticker.Stop()

	var lastTopics = make(map[string]struct{})
	for {
		select {
		case <-ticker.C:
			deadPartitions := manager.Default.DeadPartitions()
			for topic, dp := range deadPartitions {
				this.markPartitionsDead(topic, dp)

				lastTopics[topic] = struct{}{}
			}

			for lastDeadTopic := range lastTopics {
				if _, present := deadPartitions[lastDeadTopic]; !present {
					// this topic was marked dead last round, but this round it comes alive

					log.Trace("%s come alive again", lastDeadTopic)

					this.markPartitionsDead(lastDeadTopic, nil)
					delete(lastTopics, lastDeadTopic)
				}
			}

		case <-this.shutdownCh:
			return
		}
	}

}

func (this *subStore) Start() (err error) {
	this.subManager = newSubManager()

	this.wg.Add(1)
	go func() {
		defer this.wg.Done()

		var remoteAddr string
		for {
			select {
			case <-this.shutdownCh:
				log.Trace("sub store[%s] stopped", this.Name())
				return

			case remoteAddr = <-this.closedConnCh:
				this.wg.Add(1)
				go func(id string) {
					this.subManager.killClient(id)
					this.wg.Done()
				}(remoteAddr)
			}
		}
	}()

	return
}

func (this *pubStore) Start() (err error) {
	if ctx.KafkaHome() == "" {
		return fmt.Errorf("empty kafka_home in ~/.gafka.cf")
	}
	if !gio.DirExists(ctx.KafkaHome()) {
		return fmt.Errorf("kafka not installed in %s, run 'gk deploy -kfkonly'", ctx.KafkaHome())
	}

	// warmup: create pools according the current kafka topology
	for _, cluster := range meta.Default.ClusterNames() {
		this.pubPools[cluster] = newPubPool(this, cluster,
			meta.Default.BrokerList(cluster), this.pubPoolsCapcity)
	}

	this.wg.Add(1)
	go func() {
		defer this.wg.Done()

		for {
			select {
			case <-meta.Default.RefreshEvent():
				this.doRefresh()

			case <-this.shutdownCh:
				log.Trace("pub store[%s] stopped", this.Name())
				return
			}
		}
	}()

	return
}

func (f *File) Attr(ctx context.Context, o *fuse.Attr) error {
	f.RLock()
	defer f.RUnlock()

	*o = f.attr

	// calculate size
	if !f.opened {
		if err := f.dir.reconnectKafkaIfNecessary(); err != nil {
			return err
		}

		latestOffset, err := f.dir.GetOffset(f.topic, f.partitionId, sarama.OffsetNewest)
		if err != nil {
			log.Error(err)

			return err
		}
		oldestOffset, err := f.dir.GetOffset(f.topic, f.partitionId, sarama.OffsetOldest)
		if err != nil {
			log.Error(err)

			return err
		}

		o.Size = uint64(latestOffset - oldestOffset)
	} else {
		o.Size = uint64(len(f.content))
	}

	log.Trace("File Attr, topic=%s, partitionId=%d, size=%d", f.topic, f.partitionId, o.Size)

	return nil
}

// Close stops the queue for reading and writing
func (q *queue) Close() error {
	close(q.quit)
	// wait for pump and housekeeping finish
	q.wg.Wait()

	q.mu.Lock()
	defer q.mu.Unlock()

	for _, s := range q.segments {
		if err := s.Close(); err != nil {
			return err
		}
	}

	q.head = nil
	q.tail = nil
	q.segments = nil

	log.Trace("queue[%s] dumping cursor", q.ident())
	if err := q.cursor.dump(); err != nil {
		return err
	}
	q.cursor = nil
	return nil
}

func (this *Client) Warmup() {
	var (
		sess *mgo.Session
		err  error
		t1   = time.Now()
	)
	for retries := 0; retries < 3; retries++ {
		for _, server := range this.selector.ServerList() {
			sess, err = this.getConn(server.Uri())
			if err != nil {
				log.Error("Warmup %v fail: %s", server.Uri(), err)
				break
			} else {
				this.putFreeConn(server.Uri(), sess)
			}
		}

		if err == nil {
			break
		}
	}

	if err == nil {
		log.Trace("Mongodb warmup within %s: %+v",
			time.Since(t1), this.freeconns)
	} else {
		log.Error("Mongodb failed to warmup within %s: %s",
			time.Since(t1), err)
	}

}

func (this *profiler) do(callName string, ctx *rpc.Context, format string,
	args ...interface{}) {
	if this == nil {
		return
	}

	elapsed := time.Since(this.t1)
	slow := elapsed > config.Engine.Servants.CallSlowThreshold
	if !(slow || this.on) {
		return
	}

	body := fmt.Sprintf(format, args...)
	if slow {
		svtStats.incCallSlow()

		header := fmt.Sprintf("SLOW=%s/%s Q=%s ",
			elapsed, time.Since(this.t0), callName)
		log.Warn(header + this.truncatedStr(body))
	} else if this.on {
		header := fmt.Sprintf("T=%s/%s Q=%s ",
			elapsed, time.Since(this.t0), callName)
		log.Trace(header + this.truncatedStr(body))
	}

}

// NewMessage is the supported way to obtain a new Message.  This makes
// use of a "slab allocator" which greatly reduces the load on the
// garbage collector.
func NewMessage(size int) *Message {
	var ch chan *Message
	for _, slabClass := range messagePool { // TODO binary search
		if size <= slabClass.maxSize {
			ch = slabClass.ch
			size = slabClass.maxSize
			break
		}
	}

	var msg *Message
	select {
	case msg = <-ch:
	default:
		// message pool empty:
		// too busy or size greater than largest slab class
		log.Trace("allocating message memory pool: %dB", size)

		msg = &Message{}
		msg.slabSize = size
		msg.bodyBuf = make([]byte, 0, msg.slabSize)
	}

	msg.Body = msg.bodyBuf
	return msg
}

// Close must be called before Recycle
func (this *syncProducerClient) Close() {
	log.Trace("cluster[%s] closing kafka sync client: %d", this.cluster, this.id)

	// will close the producer and the kafka tcp conn
	this.SyncProducer.Close()
	this.closed = true
}

func (f *File) ReadAll(ctx context.Context) ([]byte, error) {
	f.RLock()
	defer f.RUnlock()

	log.Trace("File ReadAll, topic=%s, partitionId=%d", f.topic, f.partitionId)

	return f.content, nil
}

func (f *File) Release(ctx context.Context, req *fuse.ReleaseRequest) error {
	log.Trace("File Release, req=%#v, topic=%s, partitionId=%d", req,
		f.topic, f.partitionId)
	f.opened = false
	close(f.closeCh)
	f.content = make([]byte, 0, 16<<10)
	return f.consumer.Close()
}

func (this *subServer) waitExit(exit <-chan struct{}) {
	<-exit

	if this.httpServer != nil {
		// HTTP response will have "Connection: close"
		this.httpServer.SetKeepAlivesEnabled(false)

		// avoid new connections
		if err := this.httpListener.Close(); err != nil {
			log.Error(err.Error())
		}

		log.Trace("%s on %s listener closed", this.name, this.httpServer.Addr)
	}

	if this.httpsServer != nil {
		// HTTP response will have "Connection: close"
		this.httpsServer.SetKeepAlivesEnabled(false)

		// avoid new connections
		if err := this.httpsListener.Close(); err != nil {
			log.Error(err.Error())
		}

		log.Trace("%s on %s listener closed", this.name, this.httpsServer.Addr)
	}

	this.idleConnsLock.Lock()
	t := time.Now().Add(time.Millisecond * 100)
	for c := range this.idleConns {
		c.SetReadDeadline(t)
	}
	this.idleConnsLock.Unlock()

	if this.idleConnsWg.WaitTimeout(Options.SubTimeout) {
		log.Warn("%s waiting for all connected client close timeout: %s",
			this.name, Options.SubTimeout)
	}

	this.subMetrics.Flush()
	this.timer.Stop()

	this.gw.wg.Done()
	close(this.closed)
}

func (this *ClientPool) Warmup() {
	t1 := time.Now()
	for _, client := range this.clients {
		client.Warmup()
	}

	log.Trace("Memcache pool warmup within %s: %+v",
		time.Since(t1), this.FreeConnMap())
}