Send array via RabbitMQ

Question

How can I send an array of messages using RabbitMQ? I do not want to send every message separately.

For example:

ch.publish(ex, '', new Buffer('hello world'));

How could I use something like:

ch.publish(ex, '', new Buffer([msg1, msg2, msg3...]));

Thank you!

score 2 · Answer 1 · answered Jan 21 '19 at 04:24

2

You can pass JSON through like so:

var json = JSON.stringify(arr);
ch.publish(ex, '', new Buffer(json));

Then the consumer would parse the JSON.

answered Jan 21 '19 at 04:24

Edward

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score 1 · Answer 2 · answered Sep 15 '15 at 13:23

How could I send array of messages using RabbitMQ? I do not want to send every message separately.

You can't. Each message must be sent individually.

If you tried to do what you want, you would end up with a single "message" that contained all of the individual messages you wanted to send.

If you want to make an API that looks like you can do this, just create a function that takes an array of messages, loops through them and sends them one at a time.

(nodejs / amqplib)

function publishAll(ex, ...messages){
  return messages.map((msg) => {
    ch.publish(ex, '', msg);
  });
}

var pub = publishAll("my.exchange", [msg1, msg2, msg3]);
pub.then(() => {
  // run code after they are all published
});

score 0 · Answer 3 · answered Jun 12 '18 at 21:39

I addition to what @derick-bailey said, if you need more than one variable to be sent in each message you could always make a string with the variables comma separated. Or, if you'll use commas in the text you can find some other symbol that will work.

Send array via RabbitMQ

3 Answers3