Using Neo4j embedded in Java applications

This section describes how to use Neo4j embedded in Java applications.

The following topics are:

Embedding Neo4j in your Java application
Hello world
Property values
Using indexes
Resource iterator — Managing resources in long-running transactions.
Controlling logging
Traversing a graph
Domain entities
Graph algorithm examples
Unique nodes — Getting or creating a unique node using Cypher and uniqueness constraints.
Bolt connector — Accessing Neo4j embedded via the Bolt protocol.
Terminate a transaction — How to terminate (abort) a long-running transaction from another thread.
Cypher queries — How to use the Cypher query language with Java.
Query parameters

When running your own code and Neo4j in the same JVM, there are a few things to keep in mind:

Do not create or retain more objects than you strictly need to. Large caches in particular tend to promote more objects to the old generation, thus increasing the need for expensive full garbage collections.
Do not use internal Neo4j APIs. They are internal to Neo4j and subject to change without notice, which may break or change the behavior of your code.
Do not enable the -XX:+TrustFinalNonStaticFields JVM flag when running in embedded mode.