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Typings on Amqp

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This commit is contained in:
Günther Erb 2020-12-30 13:29:29 +01:00
parent dfa847cfee
commit 7648ee8d93
1 changed files with 63 additions and 53 deletions
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116
packages/nodes-base/nodes/Amqp/AmqpTrigger.node.ts
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@ -1,4 +1,4 @@
import { ContainerOptions } from 'rhea';
import { Container, ContainerOptions, EventContext, ReceiverOptions } from 'rhea';
import { ITriggerFunctions } from 'n8n-core';
import {
@ -55,6 +55,20 @@ export class AmqpTrigger implements INodeType {
description: 'Leave empty for non-durable topic subscriptions or queues',
},
{
displayName: 'Pull N Messages per Cicle',
name: 'pullMessagesNumber',
type: 'number',
default: 100,
description: 'Number of messages to pull from the bus for every cicle',
},
{
displayName: 'Sleep time after cicle',
name: 'sleepTime',
type: 'number',
default: 10,
description: 'Milliseconds to sleep after every cicle',
},
{
displayName: 'Options',
name: 'options',
type: 'collection',
@ -119,7 +133,7 @@ export class AmqpTrigger implements INodeType {
},
],
},
],
]
};
@ -134,10 +148,10 @@ export class AmqpTrigger implements INodeType {
const clientname = this.getNodeParameter('clientname', '') as string;
const subscription = this.getNodeParameter('subscription', '') as string;
const options = this.getNodeParameter('options', {}) as IDataObject;
const pullMessagesNumber = options.pullMessagesNumber || 100;
const pullMessagesNumber = options.pullMessagesNumber as number || 100;
const container_id = options.containerID as string;
const containerReconnect = options.reconnect || true as boolean;
const containerReconnectLimit = options.reconnectLimit || 50 as number;
const containerReconnect = options.reconnect as boolean || true ;
const containerReconnectLimit = options.reconnectLimit as number || 50;
if (sink === '') {
throw new Error('Queue or Topic required!');
@ -149,38 +163,23 @@ export class AmqpTrigger implements INodeType {
durable = true;
}
const container = require('rhea');
const container: Container = require('rhea');
/*
Values are documentet here: https://github.com/amqp/rhea#container
*/
const connectOptions: ContainerOptions = {
host: credentials.hostname,
hostname: credentials.hostname,
port: credentials.port,
reconnect: containerReconnect,
reconnect_limit: containerReconnectLimit,
};
if (credentials.username || credentials.password) {
connectOptions.username = credentials.username;
connectOptions.password = credentials.password;
}
if (credentials.transportType) {
connectOptions.transport = credentials.transportType;
}
if(container_id) {
connectOptions.id = container_id;
connectOptions.container_id = container_id;
}
let lastMsgId: number | undefined = undefined;
let lastMsgId: string| number | Buffer | undefined = undefined;
const self = this;
container.on('receiver_open', (context: any) => { // tslint:disable-line:no-any
context.receiver.add_credit(pullMessagesNumber);
});
container.on('message', (context: any) => { // tslint:disable-line:no-any
container.on('message', (context: EventContext) => { // tslint:disable-line:no-any
// No message in the context
if(!context.message)
return;
console.log("New Message on Amqp Trigger from " + container.id + " context conteaineer id: " + context.container.id);
// ignore duplicate message check, don't think it's necessary, but it was in the rhea-lib example code
if (context.message.message_id && context.message.message_id === lastMsgId) {
return;
@ -188,6 +187,12 @@ export class AmqpTrigger implements INodeType {
lastMsgId = context.message.message_id;
let data = context.message;
if(options.jsonConvertByteArrayToString === true && data.body.content !== undefined) {
// The buffer is not ready... Stringify and parse back to load it.
let cont = JSON.stringify(data.body.content);
data.body = String.fromCharCode.apply(null,JSON.parse(cont).data);
}
if (options.jsonConvertByteArrayToString === true && data.body.content !== undefined) {
// The buffer is not ready... Stringify and parse back to load it.
@ -209,35 +214,40 @@ export class AmqpTrigger implements INodeType {
}
self.emit([self.helpers.returnJsonArray([data])]);
self.emit([self.helpers.returnJsonArray([data as any])]);
if (context.receiver.credit === 0) {
if (!context.receiver?.has_credit()) {
setTimeout(() => {
context.receiver.add_credit(pullMessagesNumber);
context.receiver?.add_credit(pullMessagesNumber);
}, options.sleepTime as number || 10);
}
});
/*
Values are documentet here: https://github.com/amqp/rhea#container
*/
const connectOptions: ContainerOptions = {
host: credentials.hostname,
hostname: credentials.hostname,
port: credentials.port,
reconnect: containerReconnect,
reconnect_limit: containerReconnectLimit,
username: credentials.username ? credentials.username : undefined,
password: credentials.password ? credentials.password : undefined,
transport: credentials.transportType ? credentials.transportType : undefined,
container_id: container_id ? container_id : undefined,
id: container_id ? container_id : undefined,
};
const connection = container.connect(connectOptions);
let clientOptions = undefined;
if (durable) {
clientOptions = {
name: subscription,
source: {
address: sink,
durable: 2,
expiry_policy: 'never',
},
credit_window: 0, // prefetch 1
};
} else {
clientOptions = {
source: {
address: sink,
},
credit_window: 0, // prefetch 1
};
}
let clientOptions : ReceiverOptions = {
source: {
address: sink,
durable: (durable ? 2 : undefined),
expiry_policy: (durable ? 'never' : undefined),
},
credit_window: 0, // prefetch 1
};
connection.open_receiver(clientOptions);
@ -248,7 +258,7 @@ export class AmqpTrigger implements INodeType {
container.removeAllListeners('message');
connection.close();
}
// The "manualTriggerFunction" function gets called by n8n
// when a user is in the workflow editor and starts the
// workflow manually.
@ -258,7 +268,7 @@ export class AmqpTrigger implements INodeType {
await new Promise((resolve, reject) => {
const timeoutHandler = setTimeout(() => {
reject(new Error('Aborted, no message received within 30secs. This 30sec timeout is only set for "manually triggered execution". Active Workflows will listen indefinitely.'));
}, 30000);
}, 3000);
container.on('message', (context: any) => { // tslint:disable-line:no-any
// Check if the only property present in the message is body
// in which case we only emit the content of the body property