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Major changes around events, event log, etc.

Browse source 
* User event log is now functional & attached to various events
* Add additional missing system events
* Completely re-write last_callers to have new functionality, etc.
* Events.addListenerMultipleEvents()
* New 'moduleInitialize' export for module init vs Event specific registerEvents
* Add docs on last_callers mod
This commit is contained in:
Bryan Ashby 2018-07-21 14:32:06 -06:00
parent c1ae3d88ba
commit 52585c78f0
16 changed files with 392 additions and 171 deletions
Download patch file Download diff file Expand all files Collapse all files

46
core/events.js
View file

@ -1,20 +1,14 @@
/* jslint node: true */
'use strict';
const paths = require('path');
const events = require('events');
const Log = require('./logger.js').log;
const SystemEvents = require('./system_events.js');
// deps
const _ = require('lodash');
const async = require('async');
const glob = require('glob');
module.exports = new class Events extends events.EventEmitter {
constructor() {
super();
this.setMaxListeners(32); // :TODO: play with this...
this.setMaxListeners(64); // :TODO: play with this...
}
getSystemEvents() {
@ -41,39 +35,21 @@ module.exports = new class Events extends events.EventEmitter {
return super.once(event, listener);
}
addListenerMultipleEvents(events, listener) {
Log.trace( { events }, 'Registring event listeners');
events.forEach(eventName => {
this.on(eventName, event => {
listener(eventName, event);
});
});
}
removeListener(event, listener) {
Log.trace( { event : event }, 'Removing listener');
return super.removeListener(event, listener);
}
startup(cb) {
async.each(require('./module_util.js').getModulePaths(), (modulePath, nextPath) => {
glob('*{.js,/*.js}', { cwd : modulePath }, (err, files) => {
if(err) {
return nextPath(err);
}
async.each(files, (moduleName, nextModule) => {
const fullModulePath = paths.join(modulePath, moduleName);
try {
const mod = require(fullModulePath);
if(_.isFunction(mod.registerEvents)) {
// :TODO: ... or just systemInit() / systemShutdown() & mods could call Events.on() / Events.removeListener() ?
mod.registerEvents(this);
}
} catch(e) {
Log.warn( { error : e }, 'Exception during module "registerEvents"');
}
return nextModule(null);
}, err => {
return nextPath(err);
});
});
}, err => {
return cb(err);
});
return cb(null);
}
};