Пример #1
0
// GetNSQDTopics returns a []string containing all the topics
// produced by the given nsqd
func GetNSQDTopics(nsqdHTTPAddrs []string) ([]string, error) {
	topics := make([]string, 0)
	var lock sync.Mutex
	var wg sync.WaitGroup
	success := false
	for _, addr := range nsqdHTTPAddrs {
		wg.Add(1)
		endpoint := fmt.Sprintf("http://%s/stats?format=json", addr)
		log.Printf("NSQD: querying %s", endpoint)

		go func(endpoint string) {
			data, err := util.ApiRequest(endpoint)
			lock.Lock()
			defer lock.Unlock()
			defer wg.Done()
			if err != nil {
				log.Printf("ERROR: lookupd %s - %s", endpoint, err.Error())
				return
			}
			success = true
			topicList, _ := data.Get("topics").Array()
			for i := range topicList {
				topicInfo := data.Get("topics").GetIndex(i)
				topics = util.StringAdd(topics, topicInfo.Get("topic_name").MustString())
			}
		}(endpoint)
	}
	wg.Wait()
	sort.Strings(topics)
	if success == false {
		return nil, errors.New("unable to query any nsqd")
	}
	return topics, nil
}
Пример #2
0
// GetLookupdTopicProducers returns a []string of the broadcast_address:http_port of all the
// producers for a given topic by unioning the results returned from the given lookupd
func GetLookupdTopicProducers(topic string, lookupdHTTPAddrs []string) ([]string, error) {
	success := false
	allSources := make([]string, 0)
	var lock sync.Mutex
	var wg sync.WaitGroup

	for _, addr := range lookupdHTTPAddrs {
		wg.Add(1)

		endpoint := fmt.Sprintf("http://%s/lookup?topic=%s", addr, url.QueryEscape(topic))
		log.Printf("LOOKUPD: querying %s", endpoint)

		go func(endpoint string) {
			data, err := nsq.ApiRequest(endpoint)
			lock.Lock()
			defer lock.Unlock()
			defer wg.Done()
			if err != nil {
				log.Printf("ERROR: lookupd %s - %s", endpoint, err.Error())
				return
			}
			success = true
			producers := data.Get("producers")
			producersArray, _ := producers.Array()
			for i := range producersArray {
				producer := producers.GetIndex(i)
				address := producer.Get("address").MustString() //TODO: remove for 1.0
				broadcastAddress := producer.Get("broadcast_address").MustString()
				if broadcastAddress == "" {
					broadcastAddress = address
				}
				httpPort := producer.Get("http_port").MustInt()
				key := fmt.Sprintf("%s:%d", broadcastAddress, httpPort)
				allSources = util.StringAdd(allSources, key)
			}
		}(endpoint)
	}
	wg.Wait()
	if success == false {
		return nil, errors.New("unable to query any lookupd")
	}
	return allSources, nil
}