各dbのdeferred wrapper

README.md

deferred化しました

使い方は次のようになります

dLevel = require "dLevel"
db = dLevel("./mydb")
db.set("name", "dLevel")
.then(()->
  db.get("name")
)
.then((val)->
  console.log(val)
  db.end()
)

dLevel.coffee

"use strict"

deferred        = require "deferred"
Level           = require "level"

module.exports = dLevel = (dbname)->
  dLevel = {}

  db = Level dbname

  for k, v of db
    continue unless typeof v is 'function'
    do (k, v)->
      dLevel[k] = (args...)->
        d = deferred()
        args.push (err, ret...)->
          return d.reject err if err
          d.resolve.apply d, ret

        db[k].apply db, args
        d.promise

  dLevel

dMySql.coffee

"use strict"

deferred        = require "deferred"
MySql           = require "mysql"

dMySql = (config = {})->
  mysql = MySql.createConnection(config)
  dMySql = {}
  for k, v of mysql
    continue unless typeof v is 'function'
    do (k, v)->
      dMySql[k] = (args...)->
        d = deferred()
        args.push (err, ret...)->
          return d.reject err if err
          d.resolve.apply d, ret

        mysql[k].apply mysql, args
        d.promise

  # end does not require callback
  dMySql.end = ()->
    d = deferred()
    d.resolve mysql.end()
    d.promise

  dMySql

dRedis.coffee

"use strict"

deferred        = require "deferred"
Redis           = require "redis"

dRedis = (port = 6379, host = "localhost", options)->
  redis = Redis.createClient(port, host, options)
  dRedis = {}
  for k, v of redis
    continue unless typeof v is 'function'
    do (k, v)->
      dRedis[k] = (args...)->
        d = deferred()
        args.push (err, ret...)->
          return d.reject err if err
          d.resolve.apply d, ret

        redis[k].apply redis, args
        d.promise

  # end does not require callback
  dRedis.end = ()->
    d = deferred()
    d.resolve redis.end()
    d.promise

  dRedis