Wait for connections to MongoDB and redis to be established on startup. Added configuration option to specify redis DB.

lib/cwmp.coffee

@@ -559,20 +559,24 @@ cluster = require 'cluster'
 numCPUs = require('os').cpus().length
 
 if cluster.isMaster
-  db.redisClient.flushdb()
-  cluster.on('listening', (worker, address) ->
-    util.log("Worker #{worker.process.pid} listening to #{address.address}:#{address.port}")
-  )
+  db.connect((err) ->
+    throw err if err
+    db.redisClient.flushdb()
+    db.disconnect()
+    cluster.on('listening', (worker, address) ->
+      util.log("Worker #{worker.process.pid} listening to #{address.address}:#{address.port}")
+    )
 
-  cluster.on('exit', (worker, code, signal) ->
-    util.log("Worker #{worker.process.pid} died (#{worker.process.exitCode})")
-    setTimeout(()->
+    cluster.on('exit', (worker, code, signal) ->
+      util.log("Worker #{worker.process.pid} died (#{worker.process.exitCode})")
+      setTimeout(()->
+        cluster.fork()
+      , config.WORKER_RESPAWN_TIME)
+    )
+
+    for [1 .. numCPUs]
       cluster.fork()
-    , config.WORKER_RESPAWN_TIME)
   )
-
-  for [1 .. numCPUs]
-    cluster.fork()
 else
   options = {
     key: fs.readFileSync('../config/httpscert.key'),
@@ -582,8 +586,8 @@ else
   httpServer = http.createServer(listener)
   httpsServer = https.createServer(options, listener)
 
-  # wait until DB connections are established
-  setTimeout(() ->
+  db.connect((err) ->
+    throw err if err
     httpServer.listen(config.ACS_PORT, config.ACS_INTERFACE)
     httpsServer.listen(config.ACS_HTTPS_PORT, config.ACS_HTTPS_INTERFACE)
-  , 1000)
+  )