我试图通过打开读取流来读取一些文件,并通过 ZMQ 将文件 block 发送到另一个进程来使用它们。该流正在正常工作,但是当我启动工作程序时,它看不到已发送的数据。
我尝试每 500 毫秒通过套接字发送数据,而不是在回调中,当我启动工作程序时,它会收集所有以前的数据 block :
sender = zmq.socket('push')
setInterval(() ->
console.log('sending work');
sender.send('some work')
, 500)
<小时/>
receiver = zmq.socket("pull")
receiver.on "message", (msg) ->
console.log('work is here: %s', msg.toString())
<小时/>
输出:
sending work
sending work
sending work
sending work
sending work
// here I start the worker
sending work
work is here: some work
work is here: some work
work is here: some work
work is here: some work
work is here: some work
work is here: some work
sending work
work is here: some work
sending work
work is here: some work
sending work
work is here: some work
因此,当工作进程启动时,它首先提取所有以前的数据,然后每次有新数据进入时都会提取它。当我这样做时,这不适用:
readStream = fs.createReadStream("./data/pg2701.txt", {'bufferSize': 100 * 1024})
readStream.on "data", (data) ->
console.log('sending work');
sender.send('some work'); // I'd send 'data' if it worked..
在这种情况下,工作线程根本不会提取任何数据。 那些类型的套接字是否应该创建队列?我在这里缺少什么?
最佳答案
是的,推送套接字在达到 HWM 之前一直处于阻塞状态,并且没有人可以发送。 也许发件人尚未绑定(bind),请尝试如下操作:
sender.bind('address', function(err) {
if (err) throw err;
console.log('sender bound!');
// the readStream code.
}
您的代码示例中还缺少 connect
,我敢打赌它就在那里,但也许您忘记了。
关于node.js - ZeroMQ 推/拉和 Nodejs 读取流,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/13276680/