Added Background Agent (git resync + cache purge)

This commit is contained in:
NGPixel 2016-08-31 22:45:28 -04:00
parent e8ebf9d231
commit 59feacd846
6 changed files with 156 additions and 4 deletions

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@ -18,6 +18,7 @@
##### Milestones
- [ ] Assets Management
- [ ] Authentication
- [x] Background Agent (git sync, cache purge, etc.)
- [x] Caching
- [x] Create Entry
- [x] Edit Entry
@ -27,4 +28,5 @@
- [x] Navigation
- [x] Parsing / Tree / Metadata
- [ ] Search
- [x] UI
- [x] UI
- [x] View Entry Source

91
agent.js Normal file
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@ -0,0 +1,91 @@
// ===========================================
// REQUARKS WIKI - Background Agent
// 1.0.0
// Licensed under AGPLv3
// ===========================================
global.ROOTPATH = __dirname;
// ----------------------------------------
// Load modules
// ----------------------------------------
global.winston = require('winston');
winston.info('[AGENT] Requarks Wiki BgAgent is initializing...');
var appconfig = require('./models/config')('./config.yml');
global.git = require('./models/git').init(appconfig, true);
global.entries = require('./models/entries').init(appconfig);
global.mark = require('./models/markdown');
var _ = require('lodash');
var moment = require('moment');
var Promise = require('bluebird');
var cron = require('cron').CronJob;
// ----------------------------------------
// Start Cron
// ----------------------------------------
var jobIsBusy = false;
var job = new cron({
cronTime: '0 */5 * * * *',
onTick: () => {
// Make sure we don't start two concurrent jobs
if(jobIsBusy) {
winston.warn('[AGENT] Previous job has not completed gracefully or is still running! Skipping for now. (This is not normal, you should investigate)');
return;
}
jobIsBusy = true;
// Prepare async job collector
let jobs = [];
// ----------------------------------------
// Compile Jobs
// ----------------------------------------
//-> Resync with Git remote
jobs.push(git.resync().then(() => {
//-> Purge outdated cache
return entries.purgeStaleCache();
}));
// ----------------------------------------
// Run
// ----------------------------------------
Promise.all(jobs).then(() => {
winston.info('[AGENT] All jobs completed successfully! Going to sleep for now... [' + moment().toISOString() + ']');
}).catch((err) => {
winston.error('[AGENT] One or more jobs have failed [' + moment().toISOString() + ']: ', err);
}).finally(() => {
jobIsBusy = false;
});
},
start: true,
timeZone: 'UTC'
});
// ----------------------------------------
// Shutdown gracefully
// ----------------------------------------
process.on('disconnect', () => {
winston.warn('[AGENT] Lost connection to main server. Exiting... [' + moment().toISOString() + ']');
job.stop();
process.exit();
});
process.on('exit', () => {
job.stop();
});

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@ -6,7 +6,8 @@ var Promise = require('bluebird'),
_ = require('lodash'),
farmhash = require('farmhash'),
BSONModule = require('bson'),
BSON = new BSONModule.BSONPure.BSON();
BSON = new BSONModule.BSONPure.BSON(),
moment = require('moment');
/**
* Entries Model
@ -259,6 +260,17 @@ module.exports = {
return path.join(this._cachePath, farmhash.fingerprint32(entryPath) + '.bson');
},
/**
* Gets the entry path from full path.
*
* @param {String} fullPath The full path
* @return {String} The entry path
*/
getEntryPathFromFullPath(fullPath) {
let absRepoPath = path.resolve(ROOTPATH, this._repoPath);
return _.chain(fullPath).replace(absRepoPath, '').replace('.md', '').replace(new RegExp('\\\\', 'g'),'/').value();
},
/**
* Update an existing document
*
@ -344,6 +356,35 @@ module.exports = {
return _.replace(contents, new RegExp('{TITLE}', 'g'), formattedTitle);
});
},
purgeStaleCache() {
let self = this;
let cacheJobs = [];
fs.walk(self._repoPath)
.on('data', function (item) {
if(path.extname(item.path) === '.md') {
let entryPath = self.parsePath(self.getEntryPathFromFullPath(item.path));
let cachePath = self.getCachePath(entryPath);
cacheJobs.push(fs.statAsync(cachePath).then((st) => {
if(moment(st.mtime).isBefore(item.stats.mtime)) {
return fs.unlinkAsync(cachePath);
} else {
return true;
}
}).catch((err) => {
return (err.code !== 'EEXIST') ? err : true;
}));
}
});
return Promise.all(cacheJobs);
}
};

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@ -37,10 +37,12 @@ module.exports = {
* @param {Object} appconfig The application config
* @return {Object} Git model instance
*/
init(appconfig) {
init(appconfig, sync) {
let self = this;
self._repo.sync = sync;
//-> Build repository path
if(_.isEmpty(appconfig.datadir.repo)) {

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@ -42,6 +42,7 @@
"connect-loki": "^1.0.6",
"connect-redis": "^3.1.0",
"cookie-parser": "^1.4.3",
"cron": "^1.1.0",
"express": "^4.14.0",
"express-brute": "^1.0.0",
"express-brute-loki": "^1.0.0",

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@ -17,7 +17,7 @@ var appconfig = require('./models/config')('./config.yml');
let lcdata = require('./models/localdata');
global.db = require('./models/db')(appconfig);
global.git = require('./models/git').init(appconfig);
global.git = require('./models/git').init(appconfig, false);
global.entries = require('./models/entries').init(appconfig);
global.mark = require('./models/markdown');
@ -192,4 +192,19 @@ server.on('error', (error) => {
server.on('listening', () => {
winston.info('[SERVER] HTTP server started successfully! [RUNNING]');
});
// ----------------------------------------
// Start Background Agent
// ----------------------------------------
var fork = require('child_process').fork;
var bgAgent = fork('agent.js');
bgAgent.on('message', (m) => {
});
process.on('exit', (code) => {
bgAgent.disconnect();
});