Triggers for levelup.
<img src=https://secure.travis-ci.org/dominictarr/level-trigger.png?branch=master>
Jobs must be idempotent! If the process crashes before job has calledback, it will be rerun the next time it's started, for consistency!
Stable: Expect bugfixes.
var db = require('levelup')('/tmp/level-trigger-example')
var SubLevel = require('level-sublevel'); SubLevel(db) //MUST install sublevel.
var Trigger = require('level-trigger')
var trigDb = Trigger(db, 'example', function (ch) {
//optionally index the job with a different key.
//if there are two jobs with the same key,
//it will only be triggered once.
return ch.key
},
function (value, done) {
//call done when job is done.
done()
}
})
//if you want, start the trigger in batch mode.
//this will process all the keys in the input db.
//otherwise, jobs will be processed whenever a key is inserted!
if(require('optimist').argv.batch)
trigDb.start()MIT