Files for example regarding data writer + reader to test concurrency of neo4j access through neo4j gem (http://wiki.neo4j.org/content/Getting_Started_With_Ruby)

reader.rb

require "rubygems"
require "neo4j"

#domain model
class Waypoint
  include Neo4j::NodeMixin
  #the persistent properties of this class
  property :name, :lon, :lat
  #friend relationships to other persons
  has_n :roads
  index :name
end

while(true) do
  Waypoint.find(:name => 'Seattle').each { |x|
    puts "Found Waypoint: #{x.name}"
  }
  sleep 1
end

writer.rb

require "rubygems"
require "neo4j"

#domain model
class Waypoint
  include Neo4j::NodeMixin
  #the persistent properties of this class
  property :name, :lon, :lat
  #friend relationships to other persons
  has_n :roads
  index :name
end

#populate the db
Neo4j::Transaction.run do
  #the waypoints
  NYC = Waypoint.new :name=>'New York', :lon=>-74.007124, :lat=>40.714550
  SF  = Waypoint.new :name=>'San Francisco', :lon=>-122.420139, :lat=>37.779600
  SEA = Waypoint.new :name=>'Seattle', :lon=>-122.329439, :lat=>47.603560
  #the roads
  NYC.roads << SF
  NYC.roads << SEA
  SEA.roads << SF
end

while(true) do
  Waypoint.find(:name => 'New York').each { |x|
    puts "Found Waypoint: #{x.name}"
  }
  sleep 1
end