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@axah/mq
Advanced tools
@axah/mq a Node library that provides a convenient and easy-to-use wrapper for [Rascal](https://github.com/onebeyond/rascal), which itself is a wrapper for AMQP (Advanced Message Queuing Protocol) client library [amqplib](https://amqp-node.github.io/amqpl
@axah/mq a Node library that provides a convenient and easy-to-use wrapper for Rascal, which itself is a wrapper for AMQP (Advanced Message Queuing Protocol) client library amqplib to be used in the convenience plattform .
This library aims to simplify the process of setting up a Rascal config
and provide an easy way to subscribe
and publish
to a queue. In case the default config is not suitable there is always the option to use the full feature set of rascal.
In the best case scenario it takes a queue name and generates a Rascal vhost configuration with a default exchange, the specified queue name, a dead letter queue, bindings, subscriptions and publications.
Using the following configuration:
{
"queueName": "document-extraction-request.main",
"options": { "withSubscription": true }
}
will generate the following rascal config.
{
"vhosts": {
"rabbit": {
"connection": {
"hostname": "localhost",
"management": {
"hostname": "localhost",
"port": "15672",
"protocol": "http",
"user": "admin",
"password": "*****",
"vhost": "/"
},
"port": "5672",
"protocol": "amqp",
"user": "admin",
"password": "*****",
"vhost": ""
},
"exchanges": [
{
"assert": true,
"name": "document-extraction-request.exchange",
"type": "direct"
}
],
"queues": [
{
"assert": true,
"name": "document-extraction-request.main",
"options": {
"arguments": {
"x-dead-letter-exchange": "document-extraction-request.exchange",
"x-dead-letter-routing-key": "document-extraction-request.backout"
}
}
},
{
"assert": true,
"name": "document-extraction-request.backout"
}
],
"bindings": [
{
"bindingKeys": [
"document-extraction-request.main"
],
"destination": "document-extraction-request.main",
"destinationType": "queue",
"source": "document-extraction-request.exchange"
},
{
"bindingKey": "document-extraction-request.backout",
"destination": "document-extraction-request.backout",
"destinationType": "queue",
"source": "document-extraction-request.exchange"
}
],
"publications": {},
"subscriptions": {
"document-extraction-request-subscription": {
"contentType": "application/json",
"queue": "document-extraction-request.main",
"vhost": "rabbit"
}
}
}
}
}
To use @axah/mq
in your Node.js project, you need to install it first via pnpm:
pnpm install @axah/mq
pnpm install -D @types/rascal
After installation, you can use the library in your code:
import {mq} from '@axah/mq';
const config = {
mq: {
paymentQueue: {
queueName: 'payment-service-address-update.main',
options: {
withSubscription: true,
withPublication: true,
},
},
}
}
const addressUpdateMessageSchema = z.object({id: z.string()});
type AddressUpdateMessage = z.infer<typeof addressUpdateMessageSchema>;
//setup and assert queue
await mq.initBroker(config.mq, log);
//publish to queue
await mq.publish({
vHostConfig: config.mq.paymentQueue,
contentValidator: addressUpdateMessageSchema,
content: {id: "b3b2273b-25a7-42bd-9b6d-bf49615eddef"},
log,
});
//publish to queue
await mq.subscribe({
vHostConfig: config.mq.paymentQueue,
contentValidator: addressUpdateMessageSchema,
messageHandler: createOpenPositionMessageHandler,
log,
});
const updateAddressConsumer = async ({ content} : Message<AddressUpdateMessage>) => {
//handle message
}
FAQs
MQ lib used at AXA Health
The npm package @axah/mq receives a total of 1,607 weekly downloads. As such, @axah/mq popularity was classified as popular.
We found that @axah/mq demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
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