85 lines
2.3 KiB
JavaScript
85 lines
2.3 KiB
JavaScript
let async = require('../utils/async_extend.js');
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// TODO: need to separate colors from states
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// i.e use status: /on|off|warn/ not /red|green/
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// it's up to the logger or console to determine the color
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class ServicesMonitor {
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constructor(options) {
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this.events = options.events;
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this.logger = options.logger;
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this.checkList = {};
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this.checkTimers = {};
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this.checkState = {};
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this.working = false;
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}
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}
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ServicesMonitor.prototype.initCheck = function (checkName) {
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let self = this;
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let check = this.checkList[checkName];
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if (!check) {
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return false;
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}
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self.events.on('check:' + checkName, function (obj) {
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// TODO: see todo above
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if (check && check.status === 'red' && obj.status === 'green') {
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self.events.emit('check:backOnline:' + checkName);
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}
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if (check && check.status === 'green' && obj.status === 'red') {
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self.events.emit('check:wentOffline:' + checkName);
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}
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self.checkState[checkName] = obj.name[obj.status];
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check.status = obj.status;
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self.events.emit("servicesState", self.checkState);
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});
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if (check.interval !== 0) {
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self.checkTimers[checkName] = setInterval(function () {
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check.fn.call(check.fn, function (obj) {
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self.events.emit('check:' + checkName, obj);
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});
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}, check.interval);
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}
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check.fn.call(check.fn, function (obj) {
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self.events.emit('check:' + checkName, obj);
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});
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};
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ServicesMonitor.prototype.addCheck = function (checkName, checkFn, time) {
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let self = this;
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this.logger.trace('add check: ' + checkName);
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this.checkList[checkName] = {fn: checkFn, interval: time || 5000};
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if (this.working) {
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this.initCheck(checkName);
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}
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};
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ServicesMonitor.prototype.stopCheck = function (name) {
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clearInterval(this.checkTimers[name]);
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delete this.checkTimers[name];
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delete this.checkList[name];
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delete this.checkState[name];
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};
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ServicesMonitor.prototype.startMonitor = function () {
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let self = this;
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this.working = true;
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this.logger.trace('startMonitor');
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async.eachObject(this.checkList, function (checkName, check, callback) {
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self.initCheck(checkName);
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callback();
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}, function (err) {
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if (err) {
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self.logger.error("error running service check");
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self.logger.error(err.message);
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}
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});
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};
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module.exports = ServicesMonitor;
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