veliovgroup/neo4j-demo

Demo application for Neo4j-fiber package

Demo app

• NPM Package
• Meteor Package
• Heroku hosted demo

Functionality:

• Create / Change / Remove Cities (nodes)
• Create / Change / Remove Routes (relationships)
• Calculate shortest path (dijkstra, cheapest distance)
• Graph visualization (by visjs)
• Latency compensation (on visjs level, but we wait for server response)
• Client synchronization with minimal delay
• Exception-less conflicts UX-workflow
• Example powered by GrapheneDB
• No dependency from MongoDB

Set up Neo4j

Locally:

• Download Neo4j
• In Terminal go to downloads folder and type tar -xf <downloaded filename> -C ~/neo4j/
• Start Neo4j: ~/neo4j/bin/neo4j start
• Go to localhost:7474 and set up new credentials
• Set NEO4J_URL environment variable to connection URL for Neo4j (NEO4J_URL="http://neo4j:1234@localhost:7474" node main.js)
• Further reading

GrapheneDB:

• Go to GrapheneDB, create an account and free (or paid) plan DB
• Get DB's credentials from "DATABASES" > "Connection" tab
• Go to server/main.coffee, change credentials to your instance of Neo4j

Heroku GrapheneDB Add-on:

• From dashboard go to your app
• On "Resouces" tab type in "Add-ons" section: graphenedb
• Select plan and proceed through further steps
• Get DB's credentials
• Go to server/main.coffee, change credentials to your instance of Neo4j

Deploy to Heroku

• Go to Heroku create and confirm your new account
• Go though Node.js Tutorial
• Install Heroku Toolbet
• Set up Neo4j - see sections above
• Then go to Terminal into Meteor's project directory and run:

meteor build ../build-<your-app-name>
cd ../build-<your-app-name>
tar xvzf <name-of-archive> -C ./
cd bundle/
cp -Rf * ../
cd ../
rm -Rf bundle/
rm -Rf <name-of-archive>
git init 
git add .
nano Procfile
web: node main.js
# press ctrl + o
# press Enter (return)
# press ctrl + x
npm init
# Ignore all warnings (but not errors)
heroku create <your-app-name> --buildpack https://github.com/heroku/heroku-buildpack-nodejs
# This command will output something like: https://<your-app-name>.herokuapp.com/ | https://git.heroku.com/<your-app-name>.git
# Copy this: `http://<your-app-name>.herokuapp.com`, note use only `http://` protocol!
heroku config:set ROOT_URL=http://<your-app-name>.herokuapp.com
heroku config:set NEO4J_URL=http://<url-to-neo4j>
git commit -m "initial"
git push heroku master

• Go to http://<your-app-name>.herokuapp.com
• If you app has errors:
  • Check logs: heroku logs --tail
  • Try to run locally and debug: heroku run node