WebFund 2015W: Tutorial 6

In this tutorial you'll be learning about and extending persistent-notes. This application is notes-demo from Tutorial 4 modified to work with MongoDB. The application expects there to be a MongoDB instance running on localhost with notes in the same format as that used by the code in Assignment 5 and Tutorial 5.

Note that persistent-notes includes a node_modules directory that may only work in the class VMs. If you are running it in another environment, you'll need to delete the node_modules directory and then type "npm install" to recreate it.

Tasks/Questions

• What happens to persistent-notes when mongodb is not running when the app is started? What if it is shut down while the app is running?
  • You can stop and start mongodb by typing sudo service mongodb stop and sudo service mongodb start.
• When does the app open a connection to MongoDB? Note that it happens twice.
• You'll notice that restarting the app preserves current sessions. How can you disconnect from a session manually (without "logging out") from the browser? How can you terminate a select session from the server? What about all sessions?
• Implement a delete note button as described in Assignment 6, Question 3.

Getting Credit for Tutorial

You can either:

• Attend most of a tutorial session and show you have made progress on the above tasks and questions, or
• Show a TA a working implementation of a delete note button and at least one way to manually terminate a session.