Backup senica-RVO13 on 16.10.2025
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Jakub Klena
parent
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commit
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96 changed files with 41668 additions and 0 deletions
374
RVO13/flow_3_2_25/cloudmqttconnect.js
Executable file
374
RVO13/flow_3_2_25/cloudmqttconnect.js
Executable file
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exports.id = 'cloudmqttconnect';
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exports.title = 'Cloud connect mqtt';
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exports.group = 'MQTT';
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exports.color = '#888600';
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exports.version = '1.0.2';
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exports.icon = 'sign-out';
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exports.input = 2;
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exports.output = 2;
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exports.options = { host: 'tb-stage.worksys.io', port: 1883, clientid: "", username: "" };
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exports.html = `<div class="padding">
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<div class="row">
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<div class="col-md-6">
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<div data-jc="textbox" data-jc-path="host" data-jc-config="placeholder:test.mosquitto.org;required:false" class="m">Hostname or IP address (if not empty - setting will override db setting)</div>
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</div>
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<div class="col-md-6">
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<div data-jc="textbox" data-jc-path="port" data-jc-config="placeholder:1883;required:true" class="m">Port</div>
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</div>
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</div>
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<div class="row">
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<div class="col-md-6">
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<div data-jc="textbox" data-jc-path="clientid">@(Client id)</div>
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</div>
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<div class="col-md-6">
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<div data-jc="textbox" data-jc-path="topic" class="m">topic</div>
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</div>
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</div>
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</div>`;
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const { promisifyBuilder } = require('./helper/db_helper');
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const fs = require('fs');
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const mqtt = require('mqtt');
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const nosql = NOSQL('tbdatacloud');
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const SEND_TO = {
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debug: 0,
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rpcCall: 1,
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}
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//CONFIG
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let saveTelemetryOnError = true;//backup_on_failure overrides this value
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//------------------------
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const noSqlFileSizeLimit = 4194304;//use 5MB - 4194304
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let insertNoSqlCounter = 0;
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let insertBackupNoSqlCounter = 0;
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let processingData = false;
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let backup_on_failure = true;//== saveTelemetryOnError - create backup client send failure
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let restore_from_backup = 50; //how many rows process at once?
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let restore_backup_wait = 3;//wait seconds
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let lastRestoreTime = 0;
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// if there is an error in client connection, flow logs to monitor.txt. Not to log messages every second, we use sendClientError variable
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let sendClientError = true;
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exports.install = function(instance) {
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var client;
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var opts;
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var clientReady = false;
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let o = null; //options
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function main()
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{
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loadSettings();
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}
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//set opts according to db settings
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function loadSettings()
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{
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o = instance.options;
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if(!o.topic) o.topic = FLOW.GLOBALS.settings.cloud_topic;
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opts = {
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host: o.host,
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port: o.port,
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clientId: o.clientid,
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username: o.username,
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rejectUnauthorized: false,
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resubscribe: false
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};
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console.log("wsmqttpublich -> loadSettings from instance.options",o);
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connectToTbServer();
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}
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function connectToTbServer()
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{
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var url = "mqtt://" + opts.host + ":" + opts.port;
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console.log("MQTT URL: ", url);
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client = mqtt.connect(url, opts);
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client.on('connect', function() {
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client.subscribe(`${o.topic}_backward`, (err) => {
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if (!err) {
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console.log("MQTT subscribed");
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}
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});
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instance.status("Connected", "green");
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clientReady = true;
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sendClientError = true;
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});
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client.on('reconnect', function() {
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instance.status("Reconnecting", "yellow");
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clientReady = false;
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});
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client.on('message', function(topic, message) {
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// message is type of buffer
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message = message.toString();
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if (message[0] === '{') {
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TRY(function() {
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message = JSON.parse(message);
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if (message.hasOwnProperty("device") && message.hasOwnProperty("data") && message.data.hasOwnProperty("id")) {
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client.publish(`${o.topic}_forward`, `{"device": "${message.device}", "id": ${message.data.id}, "data": {"success": true}}`, {qos:1});
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instance.send(SEND_TO.rpcCall, {"device": message.device, "id": message.data.id, "RPC response": {"success": true}});
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}
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}, () => instance.debug('MQTT: Error parsing data', message));
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}
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instance.send(SEND_TO.rpcCall, {"topic":o.topic, "content":message });
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});
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client.on('close', function() {
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clientReady = false;
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instance.status("Disconnected", "red");
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instance.send(SEND_TO.debug, {"message":"Client CLOSE signal received !"});
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});
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client.on('error', function(err) {
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instance.status("Err: "+ err.code, "red");
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instance.send(SEND_TO.debug, {"message":"Client ERROR signal received !", "error":err, "opt":opts });
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if(sendClientError) {
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console.log('MQTT client error', err);
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sendClientError = false;
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}
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clientReady = false;
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});
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}
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instance.on('0', function(data) {
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if(clientReady)
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{
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//do we have some data in backup file? if any, process data from database
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if(saveTelemetryOnError)
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{
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//read telemetry data and send back to server
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if(!processingData) processDataFromDatabase();
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}
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let stringifiedJson = JSON.stringify(data.data)
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client.publish(`${o.topic}_forward`, stringifiedJson, {qos: 1});
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}
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else
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{
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//logger.debug("Client unavailable. Data not sent !", JSON.stringify(data.data));
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instance.send(SEND_TO.debug, {"message":"Client unavailable. Data not sent !", "data": data.data });
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if(saveTelemetryOnError)
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{
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//create new file from tbdata.nosql, if file size exceeds given limit, and clear tbdata.nosql
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makeBackupFromDbFile();
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//write to tb
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data.data.id = UID();
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nosql.insert(data.data);
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}
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}
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});
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instance.on("1", _ => {
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main();
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})
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instance.close = function(done) {
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if(clientReady){
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client.end();
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}
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};
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function getDbBackupFileCounter(type)
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{
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var files = fs.readdirSync(__dirname + "/../databases");
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let counter = 0;
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for(var i = 0; i < files.length; i++)
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{
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if(files[i] == "tbdatacloud.nosql") continue;
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if(files[i].endsWith(".nosql"))
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{
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let pos = files[i].indexOf(".");
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if(pos > -1)
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{
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let fileCounter = counter;
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let firstDigit = files[i].slice(0, pos);
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fileCounter = parseInt(firstDigit);
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if(isNaN(fileCounter)) fileCounter = 0;
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//console.log("getDbBackupFileCounter digit:", files[i], firstDigit, fileCounter, isNaN(fileCounter), type);
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if(type == "max")
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{
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if(fileCounter > counter)
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{
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counter = fileCounter;
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}
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}
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else if(type == "min")
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{
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if(counter == 0) counter = fileCounter;
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if(fileCounter < counter)
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{
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counter = fileCounter;
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}
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}
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}
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}
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}
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if(type == "max") counter++;
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return counter;
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}
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const makeBackupFromDbFile = async () => {
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if(!saveTelemetryOnError) return;
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//to avoid large file: tbdata.nosql
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//init value is 0!
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if(insertNoSqlCounter > 0)
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{
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--insertNoSqlCounter;
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return;
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}
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insertNoSqlCounter = 100;
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let source = __dirname + "/../databases/tbdatacloud.nosql";
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var stats = fs.statSync(source);
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var fileSizeInBytes = stats.size;
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if(fileSizeInBytes > noSqlFileSizeLimit)
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{
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let counter = 1;
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counter = getDbBackupFileCounter("max");
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let destination = __dirname + "/../databases/" + counter + "." + "tbdatacloud.nosql";
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//make backup file
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fs.copyFileSync(source, destination);
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//fs.renameSync(p, p + "." + counter);
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//clear tbdata.nosql
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fs.writeFileSync(source, "");
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fs.truncateSync(source, 0);
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}
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}
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const processDataFromDatabase = async () => {
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if(restore_from_backup <= 0) return;
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//calculate diff
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const now = new Date();
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let currentTime = now.getTime();
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let diff = currentTime - lastRestoreTime;
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if( (diff / 1000) < restore_backup_wait)
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{
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//console.log("*********restore_backup_wait", diff, restore_backup_wait);
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return;
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}
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processingData = true;
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//get filename to process
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let counter = getDbBackupFileCounter("min");
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//we have some backup files
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let dataBase = 'tbdata';
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var nosql;
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if(counter == 0) dataBase = 'tbdatacloud';
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else dataBase = counter + "." + 'tbdatacloud';
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nosql = NOSQL(dataBase);
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//select all data - use limit restore_from_backup
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let records = await promisifyBuilder(nosql.find().take(restore_from_backup));
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for(let i = 0; i < records.length; i++)
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{
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if(clientReady) {
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let item = records[i];
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let id = item.id;
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if(id !== undefined)
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{
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//console.log("------------processDataFromDatabase - remove", id, dataBase, i);
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try {
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let message = JSON.parse(JSON.stringify(item));
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delete message.id;
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client.publish(`${o.topic}_forward`, JSON.stringify(message), {qos:1});
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//remove from database
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await promisifyBuilder(nosql.remove().where("id", id));
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} catch(error) {
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//process error
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console.log("processDataFromDatabase", error);
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}
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}
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}
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else
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{
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processingData = false;
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return;
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}
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}
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if(records.length > 0)
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{
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//clean backup file
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if(counter > 0) nosql.clean();
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}
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//no data in db, remove
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if(records.length == 0)
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{
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if(counter > 0) nosql.drop();
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}
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const d = new Date();
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lastRestoreTime = d.getTime();
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processingData = false;
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}
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instance.on('options', main);
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};
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