golang-nsq訊息佇列應用

這是一個建立於 的文章，其中的資訊可能已經有所發展或是發生改變。

　　訊息佇列由生產者和消費者共同協作，生產者產生訊息放入隊列中，消費者從隊列中取出訊息。

 

1.消費者type Producer struct {    id     int64    addr   string    conn   producerConn    config Config    logger   logger    logLvl   LogLevel    logGuard sync.RWMutex    responseChan chan []byte    errorChan    chan []byte    closeChan    chan int    transactionChan chan *ProducerTransaction    transactions    []*ProducerTransaction    state           int32    concurrentProducers int32    stopFlag            int32    exitChan            chan int    wg                  sync.WaitGroup    guard               sync.Mutex}func TestProducerConnection(t *testing.T) {    config := NewConfig()    laddr := "127.0.0.1"    config.LocalAddr, _ = net.ResolveTCPAddr("tcp", laddr+":0")    w, _ := NewProducer("127.0.0.1:4150", config)    w.SetLogger(nullLogger, LogLevelInfo)    err := w.Publish("write_test", []byte("test"))    if err != nil {        t.Fatalf("should lazily connect - %s", err)    }    w.Stop()    err = w.Publish("write_test", []byte("fail test"))    if err != ErrStopped {        t.Fatalf("should not be able to write after Stop()")    }}