sqs-quooler
v1.9.1
Published
An abstraction of AWS SQS
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SQS Quooler
:walking::walking::walking::walking: An abstraction of Amazon's SQS SDK. It provides an easier to use interface than that of Amazon's SDK.
Installation
npm install --save sqs-quooler
Usage
Connecting to the queue
Note
aws-sdk
still needs to be imported. SQS Quooler is just a wrapper.
const { SQS, Credentials } = require('aws-sdk')
const { Queue } = require('sqs-quooler')
const sqs = new SQS({
region: 'your aws region',
endpoint: 'your aws endpoint',
// Credentials can be used with YOPA as below
// credentials: new Credentials({
// accessKeyId: 'x',
// secretAccessKey: 'x',
// }),
})
const myQueue = new Queue({
sqs,
endpoint: 'your aws endpoint + queue name',
concurrency: 1, // MaxNumberOfMessages
})
Pushing items to the queue
myQueue.push
(data: any) : Promise
Data sent via .push
will be stringified before it's sent to SQS.
myQueue.push({
data: 'test',
})
Removing items from the queue
myQueue.remove
(message: object) : Promise
Message object should have a ReceiptHandle
property, to identify the message.
myQueue.remove({
...
ReceiptHandle: 'receipt handle',
...
})
Changing message visibility
myQueue.changeMessageVisibility
(parameters: object) : Promise
Parameters object should have a ReceiptHandle
property, to identify the message, and a VisibilityTimeout
property to determine in how many seconds the item will return to the queue.
myQueue.changeMessageVisibility({
...
ReceiptHandle: 'receipt handle',
VisibilityTimeout: 0, // returns immediately to the queue
...
})
Retrieving items from the queue
myQueue.startProcessing
(handler: function, options: object) : Promise
Handler function should accept 2 arguments, the first one being the parsed message Body
value, and the second one being the whole message object. It will be called once for every message found in the queue (depending on the queue's concurrency
).
The options object is optional and accept the following properties:
keepMessages
(boolean): To avoid deleting the message after processing it. Default isfalse
.messageAttributesNames
(string array): The value which will be sent to thereceiveMessage
SQS method at theMessageAttributeNames
property. Default value is['All']
.attributeNames
(string array): A list of attributes that need to be returned along with each message, within theAttributes
property. Default value is['All']
.
After the handler returns (if it returns a Promise, SQS Quooler will wait for it to resolve), the item is automatically deleted from the queue. If your handler throws an error, or returns a rejected Promise, the item will not be removed from the queue.
myQueue.startProcessing((body, message) => {
// body: {
// data: 'test',
// }
// message: {
// Body: '{"data":"test"}',
// ReceiptHandle: 'receipt handle',
// MessageAttributes: {
// custom_attribute: {
// StringValue: 'custom_attribute value',
// StringListValues: [],
// BinaryListValues: [],
// DataType: 'String'
// }
// }
// ...
// }
})
Stop processing the queue
myQueue.stopProcessing
() : Promise
myQueue.stopProcessing()
Purge the queue
myQueue.purge
() : Promise
Deletes all messages in a queue
myQueue.purge()
License
You can check out the full license here
This project is licensed under the terms of the MIT license.