Example of using through2-concurrent with sqs-readable-stream
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
var AWS = require('aws-sdk'); | |
var SQSReadableStream = require('sqs-readable-stream'); | |
var through2Concurrent = require('through2-concurrent'); | |
var sqs = new AWS.SQS({ | |
apiVersion: '2012-11-05', | |
region: 'us-east-1', | |
accessKeyId: 'YOUR AMAZON ACCESS KEY' | |
}); | |
var sqsStream = new SQSReadableStream({ | |
sqsClient: sqs, | |
queueUrl: queueUrl | |
}); | |
sqsStream | |
.pipe(through2Concurrent.obj({maxConcurrency: 10}, function (message, _enc, callback) { | |
var self = this; | |
console.log('New message:', message.Body); | |
message.deleteMessage(function (err) { | |
if (err) { | |
console.log('Failed to delete message'); | |
} else { | |
console.log('Deleted message'); | |
self.push(message); | |
} | |
callback(err); | |
}); | |
})) | |
.on('data', function (message) { | |
console.log('Message that has already been deleted:', message); | |
}); | |
sqsStream.on('error', function (error) { | |
console.log('Error receiving messages:', error); | |
}); |
And one more thing: if the created transform stream emits an error (on line 26, callback(err)
), then node unpipes it from sqsStream. See here:
http://www.bennadel.com/blog/2679-how-error-events-affect-piped-streams-in-node-js.htm
Thanks @frontierpsycho, I've updated it with your fixes
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Some corrections to make it more copy-pastable:
(note
.obj
)