示例#1
0
文件: topic.go 项目: absolute8511/nsq
func (t *Topic) LoadChannelMeta() error {
	fn := t.getChannelMetaFileName()
	data, err := ioutil.ReadFile(fn)
	if err != nil {
		if !os.IsNotExist(err) {
			nsqLog.LogErrorf("failed to read channel metadata from %s - %s", fn, err)
		}
		return err
	}
	channels := make([]*ChannelMetaInfo, 0)
	err = json.Unmarshal(data, &channels)
	if err != nil {
		nsqLog.LogErrorf("failed to parse metadata - %s", err)
		return err
	}

	for _, ch := range channels {
		channelName := ch.Name
		if !protocol.IsValidChannelName(channelName) {
			nsqLog.LogWarningf("skipping creation of invalid channel %s", channelName)
			continue
		}
		channel := t.GetChannel(channelName)

		if ch.Paused {
			channel.Pause()
		}
	}
	return nil
}
示例#2
0
func getTopicChan(command string, params []string) (string, string, string, error) {
	if len(params) <= 1 {
		return "", "", "", protocol.NewFatalClientErr(nil, "E_INVALID", fmt.Sprintf("%s insufficient number of params", command))
	}

	topicName := params[0]
	partitionID := params[1]
	var channelName string
	if len(params) >= 3 {
		channelName = params[2]
	}

	if !protocol.IsValidTopicName(topicName) {
		return "", "", "", protocol.NewFatalClientErr(nil, "E_BAD_TOPIC", fmt.Sprintf("%s topic name '%s' is not valid", command, topicName))
	}

	if channelName != "" && !protocol.IsValidChannelName(channelName) {
		return "", "", "", protocol.NewFatalClientErr(nil, "E_BAD_CHANNEL", fmt.Sprintf("%s channel name '%s' is not valid", command, channelName))
	}

	if _, err := GetValidPartitionID(partitionID); err != nil {
		return "", "", "", protocol.NewFatalClientErr(nil, "E_BAD_PARTITIONID", fmt.Sprintf("%s partition id '%s' is not valid", command, partitionID))
	}
	return topicName, channelName, partitionID, nil
}
示例#3
0
func GetTopicPartitionChannelArgs(rp getter) (string, int, string, error) {
	topicName, topicPart, err := GetTopicPartitionArgs(rp)
	if err != nil {
		return "", -1, "", err
	}
	channelName := rp.Get("channel")
	if channelName == "" {
		return "", -1, "", errors.New("MISSING_ARG_CHANNEL")
	}

	if !protocol.IsValidChannelName(channelName) {
		return "", -1, "", errors.New("INVALID_ARG_CHANNEL")
	}

	return topicName, topicPart, channelName, nil
}
示例#4
0
func getTopicChanFromOld(command string, params []string) (string, string, error) {
	if len(params) <= 0 {
		return "", "", protocol.NewFatalClientErr(nil, "E_INVALID", fmt.Sprintf("%s insufficient number of params", command))
	}

	topicName := params[0]
	var channelName string
	if len(params) >= 2 {
		channelName = params[1]
	}

	if !protocol.IsValidTopicName(topicName) {
		return "", "", protocol.NewFatalClientErr(nil, "E_BAD_TOPIC", fmt.Sprintf("%s topic name '%s' is not valid", command, topicName))
	}

	if channelName != "" && !protocol.IsValidChannelName(channelName) {
		return "", "", protocol.NewFatalClientErr(nil, "E_BAD_CHANNEL", fmt.Sprintf("%s channel name '%s' is not valid", command, channelName))
	}
	return topicName, channelName, nil
}
示例#5
0
文件: nsqd.go 项目: absolute8511/nsq
func (n *NSQD) LoadMetadata(disabled int32) {
	atomic.StoreInt32(&n.isLoading, 1)
	defer atomic.StoreInt32(&n.isLoading, 0)
	fn := fmt.Sprintf(path.Join(n.GetOpts().DataPath, "nsqd.%d.dat"), n.GetOpts().ID)
	data, err := ioutil.ReadFile(fn)
	if err != nil {
		if !os.IsNotExist(err) {
			nsqLog.LogErrorf("failed to read channel metadata from %s - %s", fn, err)
		}
		return
	}

	js, err := simplejson.NewJson(data)
	if err != nil {
		nsqLog.LogErrorf("failed to parse metadata - %s", err)
		return
	}

	topics, err := js.Get("topics").Array()
	if err != nil {
		nsqLog.LogErrorf("failed to parse metadata - %s", err)
		return
	}

	for ti := range topics {
		topicJs := js.Get("topics").GetIndex(ti)

		topicName, err := topicJs.Get("name").String()
		if err != nil {
			nsqLog.LogErrorf("failed to parse metadata - %s", err)
			return
		}
		if !protocol.IsValidTopicName(topicName) {
			nsqLog.LogWarningf("skipping creation of invalid topic %s", topicName)
			continue
		}
		part, err := topicJs.Get("partition").Int()
		if err != nil {
			nsqLog.LogErrorf("failed to parse metadata - %s", err)
			return
		}
		topic := n.internalGetTopic(topicName, part, disabled)

		// old meta should also be loaded
		channels, err := topicJs.Get("channels").Array()
		if err != nil {
			nsqLog.LogErrorf("failed to parse metadata - %s", err)
			return
		}

		for ci := range channels {
			channelJs := topicJs.Get("channels").GetIndex(ci)

			channelName, err := channelJs.Get("name").String()
			if err != nil {
				nsqLog.LogErrorf("failed to parse metadata - %s", err)
				return
			}
			if !protocol.IsValidChannelName(channelName) {
				nsqLog.LogWarningf("skipping creation of invalid channel %s", channelName)
				continue
			}
			channel := topic.GetChannel(channelName)

			paused, _ := channelJs.Get("paused").Bool()
			if paused {
				channel.Pause()
			}
		}
		// we load channels from the new meta file
		topic.LoadChannelMeta()
	}
}
示例#6
0
func main() {
	var selectedMode int

	cCfg := nsq.NewConfig()
	pCfg := nsq.NewConfig()

	// TODO: remove, deprecated
	flag.Var(&nsq.ConfigFlag{cCfg}, "reader-opt", "(deprecated) use --consumer-opt")
	flag.Var(&nsq.ConfigFlag{cCfg}, "consumer-opt", "option to passthrough to nsq.Consumer (may be given multiple times, see http://godoc.org/github.com/absolute8511/go-nsq#Config)")
	flag.Var(&nsq.ConfigFlag{pCfg}, "producer-opt", "option to passthrough to nsq.Producer (may be given multiple times, see http://godoc.org/github.com/absolute8511/go-nsq#Config)")

	flag.Parse()

	if *showVersion {
		fmt.Printf("nsq_to_nsq v%s\n", version.Binary)
		return
	}

	if *topic == "" || *channel == "" {
		log.Fatal("--topic and --channel are required")
	}

	if *destTopic == "" {
		*destTopic = *topic
	}

	if !protocol.IsValidTopicName(*topic) {
		log.Fatal("--topic is invalid")
	}

	if !protocol.IsValidTopicName(*destTopic) {
		log.Fatal("--destination-topic is invalid")
	}

	if !protocol.IsValidChannelName(*channel) {
		log.Fatal("--channel is invalid")
	}

	if len(lookupdHTTPAddrs) == 0 {
		log.Fatal("--lookupd-http-address required")
	}

	if len(destNsqdTCPAddrs) == 0 {
		log.Fatal("--destination-nsqd-tcp-address required")
	}

	switch *mode {
	case "round-robin":
		selectedMode = ModeRoundRobin
	case "hostpool", "epsilon-greedy":
		selectedMode = ModeHostPool
	}

	termChan := make(chan os.Signal, 1)
	signal.Notify(termChan, syscall.SIGINT, syscall.SIGTERM)

	defaultUA := fmt.Sprintf("nsq_to_nsq/%s go-nsq/%s", version.Binary, nsq.VERSION)

	cCfg.UserAgent = defaultUA
	cCfg.MaxInFlight = *maxInFlight

	// TODO: remove, deprecated
	if hasArg("max-backoff-duration") {
		log.Printf("WARNING: --max-backoff-duration is deprecated in favor of --consumer-opt=max_backoff_duration,X")
		cCfg.MaxBackoffDuration = *maxBackoffDuration
	}

	consumer, err := nsq.NewConsumer(*topic, *channel, cCfg)
	if err != nil {
		log.Fatal(err)
	}

	pCfg.UserAgent = defaultUA

	producers := make(map[string]*nsq.Producer)
	for _, addr := range destNsqdTCPAddrs {
		producer, err := nsq.NewProducer(addr, pCfg)
		if err != nil {
			log.Fatalf("failed creating producer %s", err)
		}
		producers[addr] = producer
	}

	perAddressStatus := make(map[string]*timer_metrics.TimerMetrics)
	if len(destNsqdTCPAddrs) == 1 {
		// disable since there is only one address
		perAddressStatus[destNsqdTCPAddrs[0]] = timer_metrics.NewTimerMetrics(0, "")
	} else {
		for _, a := range destNsqdTCPAddrs {
			perAddressStatus[a] = timer_metrics.NewTimerMetrics(*statusEvery,
				fmt.Sprintf("[%s]:", a))
		}
	}

	hostPool := hostpool.New(destNsqdTCPAddrs)
	if *mode == "epsilon-greedy" {
		hostPool = hostpool.NewEpsilonGreedy(destNsqdTCPAddrs, 0, &hostpool.LinearEpsilonValueCalculator{})
	}

	handler := &PublishHandler{
		addresses:        destNsqdTCPAddrs,
		producers:        producers,
		mode:             selectedMode,
		hostPool:         hostPool,
		respChan:         make(chan *nsq.ProducerTransaction, len(destNsqdTCPAddrs)),
		perAddressStatus: perAddressStatus,
		timermetrics:     timer_metrics.NewTimerMetrics(*statusEvery, "[aggregate]:"),
	}
	consumer.AddConcurrentHandlers(handler, len(destNsqdTCPAddrs))

	for i := 0; i < len(destNsqdTCPAddrs); i++ {
		go handler.responder()
	}

	err = consumer.ConnectToNSQLookupds(lookupdHTTPAddrs)
	if err != nil {
		log.Fatal(err)
	}

	for {
		select {
		case <-consumer.StopChan:
			return
		case <-termChan:
			consumer.Stop()
		}
	}
}
示例#7
0
func (p *protocolV2) internalSUB(client *nsqd.ClientV2, params [][]byte, enableTrace bool,
	ordered bool, startFrom *ConsumeOffset) ([]byte, error) {

	state := atomic.LoadInt32(&client.State)
	if state != stateInit {
		nsqd.NsqLogger().LogWarningf("[%s] command in wrong state: %v", client, state)
		return nil, protocol.NewFatalClientErr(nil, E_INVALID, "cannot SUB in current state")
	}

	if client.HeartbeatInterval <= 0 {
		return nil, protocol.NewFatalClientErr(nil, E_INVALID, "cannot SUB with heartbeats disabled")
	}

	if len(params) < 3 {
		return nil, protocol.NewFatalClientErr(nil, E_INVALID, "SUB insufficient number of parameters")
	}

	topicName := string(params[1])
	if !protocol.IsValidTopicName(topicName) {
		return nil, protocol.NewFatalClientErr(nil, "E_BAD_TOPIC",
			fmt.Sprintf("SUB topic name %q is not valid", topicName))
	}

	partition := -1
	channelName := ""
	var err error
	channelName = string(params[2])
	if !protocol.IsValidChannelName(channelName) {
		return nil, protocol.NewFatalClientErr(nil, "E_BAD_CHANNEL",
			fmt.Sprintf("SUB channel name %q is not valid", channelName))
	}

	if len(params) == 4 {
		partition, err = strconv.Atoi(string(params[3]))
		if err != nil {
			return nil, protocol.NewFatalClientErr(nil, "E_BAD_PARTITION",
				fmt.Sprintf("topic partition is not valid: %v", err))
		}
	}

	if err = p.CheckAuth(client, "SUB", topicName, channelName); err != nil {
		return nil, err
	}

	if partition == -1 {
		partition = p.ctx.getDefaultPartition(topicName)
	}

	topic, err := p.ctx.getExistingTopic(topicName, partition)
	if err != nil {
		nsqd.NsqLogger().Logf("sub to not existing topic: %v, err:%v", topicName, err.Error())
		return nil, protocol.NewFatalClientErr(nil, E_TOPIC_NOT_EXIST, "")
	}
	if !p.ctx.checkForMasterWrite(topicName, partition) {
		nsqd.NsqLogger().Logf("sub failed on not leader: %v-%v, remote is : %v", topicName, partition, client.RemoteAddr())
		// we need disable topic here to trigger a notify, maybe we failed to notify lookup last time.
		topic.DisableForSlave()
		return nil, protocol.NewFatalClientErr(nil, FailedOnNotLeader, "")
	}
	channel := topic.GetChannel(channelName)
	err = channel.AddClient(client.ID, client)
	if err != nil {
		nsqd.NsqLogger().Logf("sub failed to add client: %v, %v", client, err)
		return nil, protocol.NewFatalClientErr(nil, FailedOnNotWritable, "")
	}

	atomic.StoreInt32(&client.State, stateSubscribed)
	client.Channel = channel
	if enableTrace {
		nsqd.NsqLogger().Logf("sub channel %v with trace enabled, remote is : %v", channelName, client.RemoteAddr())
	}
	if ordered {
		if atomic.LoadInt32(&client.SampleRate) != 0 {
			nsqd.NsqLogger().Errorf("%v", ErrOrderChannelOnSampleRate)
			return nil, protocol.NewFatalClientErr(nil, E_INVALID, ErrOrderChannelOnSampleRate.Error())
		}
		channel.SetOrdered(true)
	}
	if startFrom != nil {
		cnt := channel.GetClientsCount()
		if cnt > 1 {
			nsqd.NsqLogger().LogDebugf("the consume offset: %v can only be set by the first client: %v", startFrom, cnt)
		} else {
			queueOffset, cnt, err := p.ctx.SetChannelOffset(channel, startFrom, false)
			if err != nil {
				return nil, protocol.NewFatalClientErr(nil, E_INVALID, err.Error())
			}
			nsqd.NsqLogger().Logf("set the channel offset: %v (actual set : %v:%v), by client:%v, %v",
				startFrom, queueOffset, cnt, client.String(), client.UserAgent)
		}
	}
	client.EnableTrace = enableTrace
	// update message pump
	client.SubEventChan <- channel

	return okBytes, nil
}