Neo4j 3.0

├── bin
├── certificates
├── conf
├── data
│   ├── databases
│   │   └── graph.db
│   └── dbms
├── import
├── lib
├── logs
├── plugins
└── run

...
#
# Bolt connector
#
dbms.connector.bolt.type=BOLT
dbms.connector.bolt.enabled=true
dbms.connector.bolt.tls_level=OPTIONAL
# To have Bolt accept non-local connections, uncomment this line:
# dbms.connector.bolt.address=0.0.0.0:7687
...

logs/
├── debug.log <= anciennement messages.log dans graph.db
└── neo4j.log

// Javascript
var driver = Graph.Database.driver("bolt://localhost");
var session = driver.session();
var result = session.run("MATCH (u:User) RETURN u.name");

// Python
driver = Graph.Database.driver("bolt://localhost")
session = driver.session()
result = session.run("MATCH (u:User) RETURN u.name")

// Java
Driver driver = GraphDatabase.driver( "bolt://localhost" );
try ( Session session = driver.session() ) {
    StatementResult result = session.run("MATCH (u:User) RETURN u.name");
}

// .NET
using (var driver = GraphDatabase.Driver("bolt://localhost"))
using (var session = driver.Session())
{
    var result = session.Run("MATCH (u:User) RETURN u.name");
}

CALL dbms.procedures() YIELD name
with split(name,".") AS parts
WHERE not parts[0] = 'apoc'
RETURN parts[0..-1] AS package, count(*),collect(parts[-1]) AS procs

cypher planner=rule
MATCH (p:Product),(c:Category)
WHERE p.category_id = c.id
CREATE (c)-[:CONTAINS]->(p);

cypher planner=cost
MATCH (p:Product),(c:Category)
WHERE p.category_id = c.id
CREATE (c)-[:CONTAINS]->(p);

MATCH (a:Loc {name:"Nantes"}),(b:Loc {name:"Paris"})
MATCH trip = shortestPath((a)-[roads:ROAD*]->(b))
WHERE
  NONE(r in roads WHERE r.closed or r.speed < 30) AND
  ALL (r in  roads WHERE r.type = 'Autoroute') AND
  reduce(s=0, r in roads | s + r.distance) < 300
RETURN trip;