Neo4j optimistic locking

1

create n:Person {name: "Bob", updated: timestamp()}
return n

2

match n:Person
where n.name = "Bob"
and n.updated = 1369253063366
set n.title = "The Bat", n.updated = timestamp()
return count(n)

3

create n:Person {name: "Fred", title: "The Cat", updated: timestamp()}
return n

4

match b:Person, f:Person
where b.name = "Bob" and f.name = "Fred" 
and b.updated = 1369253064500 and f.updated = 1369254187545
create b-[r:KNOWS]->f
set b.updated = timestamp(), f.updated = b.updated, r.updated = b.updated
return count(r)

5

{
  "statements" : [ {
    "statement" : "match b:Person where b.name ={name} and b.updated = {updated} set b.name = {new_name} return count(b)",
    "parameters" : {"updated" : 1369254281895,"name" : "Bob","new_name": "bob"
    }
  } ]
}