Created
November 30, 2011 03:31
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Run function for a Node cron job
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require './schema.js' | |
mongoose = require "mongoose" | |
mongodb = require "mongodb" | |
sys = require 'sys' | |
lock = require './lock.js' | |
run = require './run.js' | |
# Sample cron | |
# * * * * * /usr/local/bin/node /var/some/dir/cron.js > /var/log/cronjs.log | |
run.attempt('every 1 minute', () -> | |
lock.check('one', (conflict) -> | |
return false if conflict | |
# Pull all the links that expire today | |
# This is done by selecting links via <date logged> - timeframe | |
# Then sending out emails | |
db = mongoose.connect(mongurl) | |
Link = mongoose.model('links', LinkSchema) | |
date = new Date() | |
# Iterate through items | |
Link.find( | |
date_expire: | |
$gte: new Date() | |
).sort('date','descending').execFind((err,docs)-> | |
console.log(err) if err | |
// Do something with docs | |
lock.destroy() | |
process.kill(process.pid, 'SIGTERM'); | |
) | |
) | |
) |
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fs = require 'fs' | |
path = require 'path' | |
lockPath = "/var/www/some/dir/" | |
lockFile = '' | |
process.on('SIGTERM', () -> | |
process.exit(1) | |
) | |
exports.check = (filename, contents..., callback) -> | |
lockFile = "#{lockPath}/#{filename}.lock" | |
path.exists lockFile, (exists) -> | |
fs.writeFileSync(lockFile, contents.join('')) unless exists | |
console.log "Lock file #{filename} already exists. Exiting..." if exists | |
callback exists | |
exports.destroy = () -> | |
path.exists(lockFile, (exists) -> | |
fs.unlinkSync(lockFile) if exists | |
) |
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exports.attempt = (time, callback) -> | |
d = new Date | |
hours = d.getHours() | |
minutes = d.getMinutes() | |
m = time.match(/every ([0-9]+) hours?/) | |
if(minutes == 0 && m && hours % m[1] == 0) then return(callback()) | |
m = time.match(/every ([0-9]+) minutes?/) | |
if(m && minutes % m[1] == 0) then return(callback()) | |
false |
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