levelup that uses a leveldown that writes to a changes feed to store its state
npm install changesdown
var changesdown = require('changesdown')
var changes = require('changes-feed')
var level = require('level')
var feed = changes(level('changes'))
var db = changesdown(level('db'), feed)
db.put('hello', 'world', function() {
db.get('hello', function(err, value) {
console.log(value) // should print world
})
})
db.createChangesStream({live:true})
.on('data', function(data) {
console.log('change:', data.value) // should print some changes
})Returns a new levelup (db) that reads and writes from the changes feed.
The levelup you pass in is used to store a view of the feed.
Any options passed will be forwarded to the levelup constructor.
Read from the changes stream and decode the changes value with the same encoding that was used in the levelup.
For example if you pass {valueEncoding: 'json'} the values
will be decoded as JSON instead of buffers
MIT