added plugin for mongodb

src/plugins/mongodb.coffee

@@ -0,0 +1,54 @@
+mongo = require 'mongoskin'
+_ = require 'underscore'
+
+
+module.exports = 
+  name: 'q-mongodb'
+  # establish db connection
+  # ---
+  # param: db                -  Database Connection URL 
+  # param: collection_name   -  Name of Cloudq Collection (Defaults cloudq.jobs)
+  init: (done) ->
+    # Init MongoDb
+    @db = mongo.db(process.env.MONGOSVR or 'localhost:27017/cloudq')
+    @jobs = @db.collection('cloudq.jobs')
+    done()
+
+  attach: (options) ->
+    # queue job
+    # ---
+    # param: name   - Name of Queue
+    # param: job    - Job Object
+    # param: cb     - callback 
+    @queueJob = (name, job, cb) ->
+      _.extend job, 
+        queue: name
+        queue_state: @QUEUED
+        inserted_at: new Date()
+      @jobs.insert job, cb
+
+    # reserve job for processing
+    # ---
+    # param: name    - Name of Queue
+    # param: cb      - Callback
+    @reserveJob = (name, cb) ->
+      @jobs.findAndModify(
+        {queue: name, queue_state: @QUEUED }
+        , [['inserted_at', 'ascending']]
+        , {$set: {queue_state: @RESERVED, updated_at: new Date() }}
+        , {new: true }
+        cb
+      )
+
+    # remove job
+    # ---
+    # param: job_id    - id of job to remove
+    # param: cb        - callback  
+    @removeJob = (job_id, cb) -> @jobs.removeById job_id, cb
+
+    # jobs by queue by state
+    # ---
+    # param: cb        - callback
+    @groupJobs = (cb) ->
+      @jobs.group ['queue','queue_state'], {}, {"count":0}, "function(obj,prev){ prev.count++; }", true, cb
+

src/queue.coffee

@@ -1,6 +1,7 @@
 broadway = require 'broadway'
 queue = new broadway.App()
 queue.use(require(process.env.PLUGIN or './plugins/couchdb'))
+#queue.use(require(process.env.PLUGIN or './plugins/mongodb'))
 
 # # Queue
 #