Controlling logging

Neo4j embedded provides logging via its own org.neo4j.logging.Log layer and does not natively use any existing Java logging framework. All logging events produced by Neo4j have a name, a level, and a message. The name is а fully qualified class name (FQCN).

Table 1. Neo4j uses the following log levels:
Level Name	Description
`ERROR`	For serious errors that are almost always fatal.
`WARN`	For events that are serious, but not fatal.
`INFO`	Informational events.
`DEBUG`	Debugging events.

To enable logging, an implementation of org.neo4j.logging.LogProvider must be provided to the org.neo4j.dbms.api.DatabaseManagementServiceBuilder, as follows:

LogProvider logProvider = new MyCustomLogProvider( output );
managementService = new DatabaseManagementServiceBuilder( databaseDirectory ).setUserLogProvider( logProvider ).build();