From 0eede1309fd981afebc70c9e096b4464ffe0d414 Mon Sep 17 00:00:00 2001 From: Wolfgang Hottgenroth Date: Thu, 26 Apr 2018 16:23:12 +0200 Subject: [PATCH] significantly improved --- package-lock.json | 704 ++++++++++++++++++++++++++++++++++++++++++++ package.json | 3 +- src/main.ts | 42 ++- src/mqtt_message.ts | 14 +- src/queue.ts | 4 +- 5 files changed, 745 insertions(+), 22 deletions(-) create mode 100644 package-lock.json diff --git a/package-lock.json b/package-lock.json new file mode 100644 index 0000000..7838d1b --- /dev/null +++ b/package-lock.json @@ -0,0 +1,704 @@ +{ + "name": "mqtt_mongo", + "version": "1.0.0", + "lockfileVersion": 1, + "requires": true, + "dependencies": { + "@types/bson": { + "version": "1.0.8", + "resolved": "https://registry.npmjs.org/@types/bson/-/bson-1.0.8.tgz", + "integrity": "sha512-PMa4nkRhLaqwsXQDDTzGbTyCIpej0ERznyAP9fyuGnlsmUbcC4Y25mdqjibYjkOPNyK/BWWUKneruaKHcS3Q8g==", + "dev": true, + "requires": { + "@types/node": "*" + } + }, + "@types/events": { 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from './queue' import * as MqttMessage from './mqtt_message' -var console = require('chalk-console') +let console = require('chalk-console') -var MQTT_BROKER_URL : String = 'mqtt://localhost' -var MONGO_DATABASE_URL : String = 'mongodb://localhost/test' -var COLLECTION : String = 'mqttMongo' -var TOPIC : String = 'mqttMongo' +const MQTT_BROKER_URL : String = 'mqtt://localhost' +const MONGO_DATABASE_URL : String = 'mongodb://localhost/test' +const COLLECTION : String = 'mqttMongo' + + +function collect(val: string, memo: string[]) { + memo.push(val); + return memo; +} import options = require('commander') options @@ -19,7 +24,9 @@ options .option('-b, --broker [broker url]', 'Broker URL', MQTT_BROKER_URL) .option('-m, --database [database url]', 'MongoDB Database URL', MONGO_DATABASE_URL) .option('-c, --collection [mongodb collection]', 'Collection in MongoDB Database', COLLECTION) - .option('-t, --topic [topic to subscribe]', 'Topic to subscribe', TOPIC) + .option('-t, --topic [topic to subscribe]', 'Topic to subscribe, can appear multiple times', collect, []) + .option('-e, --encapsulate', 'store current timestamp, topic and payload in document', false) + .option('-p, --parsePayload', 'parse payload when encapsulating (otherwise always)', false) .parse(process.argv) @@ -42,7 +49,7 @@ class MqttMongo extends Events.EventEmitter { connectToDatabase() { console.info("About to connect to database") - Mongo.MongoClient.connect(this.options['database']) + Mongo.MongoClient.connect(this.options.database) .then( (tmpDbHandle: Mongo.Db) => { this.dbHandle = tmpDbHandle @@ -71,9 +78,9 @@ class MqttMongo extends Events.EventEmitter { this.queue.on('data', () => { if (this.dbReady || true) { while (! this.queue.isEmpty()) { - var msg : MqttMessage.MqttMessage = this.queue.deq() + let msg : MqttMessage.MqttMessage = this.queue.deq() console.info(`Something in the queue: ${JSON.stringify(msg)}`) - var coll = this.dbHandle.collection(options['collection']) + let coll = this.dbHandle.collection(this.options.collection) coll.insertOne(msg.getMessage()) .then( (r) => { @@ -96,29 +103,32 @@ class MqttMongo extends Events.EventEmitter { } }) - this.mqttClient = Mqtt.connect(options['broker']) + this.mqttClient = Mqtt.connect(this.options.broker) this.mqttClient.on('offline', () => { console.warn("MQTT client is offline") }) this.mqttClient.on('reconnect', () => { console.warn("MQTT client is reconnecting") }) this.mqttClient.on('close', () => { console.warn("MQTT connection closed") }) this.mqttClient.on('connect', () => { console.info("MQTT broker connected") - this.mqttClient.subscribe(options['topic']) + this.options.topic.forEach((topic: string) => { + this.mqttClient.subscribe(topic) + console.info(`Subscribed to ${topic}`) + }) this.mqttClient.subscribe('MqttMongo/Command') this.mqttClient.publish('MqttMongo/Status', 'hello, started up') }) - var msgCnt : number = 0 - this.mqttClient.on('message', (topic : string, message : string) => { + let msgCnt : number = 0 + this.mqttClient.on('message', (topic : string, messageBuf : Buffer) => { msgCnt++; + let message = messageBuf.toString('UTF-8') console.info(`Message received ${msgCnt}, topic ${topic}, payload ${message}`) if (topic == "MqttMongo/Command" && message == "shutdown") { this.shutdown() } else { try { - var mqttMessage = new MqttMessage.MqttMessage(topic, message) - this.queue.enq(mqttMessage) + this.queue.enq(new MqttMessage.MqttMessage(topic, message, this.options.encapsulate, this.options.parsePayload)) } catch (e) { console.error(`Error while parsing Mqtt message, topic '${topic}', message '${message}' , ${e.toString()}`) } @@ -145,7 +155,7 @@ class MqttMongo extends Events.EventEmitter { } } -var mqttMongo : MqttMongo = new MqttMongo(options) +let mqttMongo : MqttMongo = new MqttMongo(options) mqttMongo.connectToDatabase() mqttMongo.connectToBroker() mqttMongo.setupHeartbeat() diff --git a/src/mqtt_message.ts b/src/mqtt_message.ts index f32fa2d..0d99ed5 100644 --- a/src/mqtt_message.ts +++ b/src/mqtt_message.ts @@ -8,10 +8,20 @@ export class MqttMessage { private topic : string private message : object - constructor(topic : string, inMessage : string) { + constructor(topic : string, inMessage : string, encapsulate: boolean = false, parsePayload: boolean = false) { this.topic = topic try { - this.message = JSON.parse(inMessage) + if (encapsulate) { + let payload: string + if (parsePayload) { + payload = JSON.parse(inMessage) + } else { + payload = inMessage + } + this.message = {'topic': topic, 'payload': payload, 'ts': new Date()} + } else { + this.message = JSON.parse(inMessage) + } } catch (e) { throw new MqttMessageError(`error while parsing message, ${e.toString()}`) } diff --git a/src/queue.ts b/src/queue.ts index 1301133..286bb02 100644 --- a/src/queue.ts +++ b/src/queue.ts @@ -27,7 +27,7 @@ export class Queue extends Events.EventEmitter { } deq() : T { - var x : T = this.peek() + let x : T = this.peek() this.q.shift() return x @@ -38,7 +38,7 @@ export class Queue extends Events.EventEmitter { throw new Error("queue is empty") } - var x : T = this.q[0] + let x : T = this.q[0] return x }