Spray.io REST service - MongoDB - Lesson 4

View the lessons list at https://github.com/karthik20522/SprayLearning

Now that we have Spray Service Setup and Routes defined, we can now hookup the database to add and fetch customer information. For the database I am using MongoDB and Casbah. Casbah is a Scala toolkit for MongoDB. Casbah is a "toolkit" rather than "driver", as Casbah is a layer on top of the official mongo-java-driver for better integration with Scala.

To get Casbah setup, we need to add casbah and it's related dependencies to the Build.scala file.
Note that we have slf4j and scala logging in the dependencies. Without slf4j you would get "Failed to load class org.slf4j.impl.StaticLoggerBinder" error.

In my example, I have created a MongoFactory that has 3 functions: getConnection, getCollection and closeConnection.
Now that we have our Factory method, the next is building the data access class for inserting and fetching data. Following code snippet has 2 operations:

• saveCustomer - which returns back the GUID after inserting into MongoDB
• findCustomer - find customer by GUID

Now to integrate this to the service: More information and resources on Casbah:

• http://mongodb.github.io/casbah/
• http://mongocasbahcookbook.tumblr.com/post/44240846005/mongodbobject-as-criteria-and-as-actions
• http://janxspirit.blogspot.com/2011/11/introduction-to-casbah-scala-mongodb.html
• http://stackoverflow.com/questions/tagged/casbah