DataNucleus supports 3 modes of operation of
db4o
- file-based, embedded-server-based
and client-server based.
In order to do so and to fit in with the JDO/JPA APIs we have defined the following means of
connection.
The following persistence properties will connect to a local
file-based
DB4O running
on your local machine
datanucleus.ConnectionURL=db4o:file:{my_db4o_file}
datanucleus.ConnectionUserName=
datanucleus.ConnectionPassword=
The filename (my_db4o_file) can be absolute OR relative.
The following persistence properties will connect to
embedded-server-based
DB4O running
on with a local file
datanucleus.ConnectionURL=db4o:server:{my_db4o_file}
datanucleus.ConnectionUserName=
datanucleus.ConnectionPassword=
The filename (my_db4o_file) can be absolute OR relative.
The following persistence properties will connect as a client to a
TCP/IP DB4O Server
datanucleus.ConnectionURL=db4o:{db4o_host}:{db4o_port}
datanucleus.ConnectionUserName=
datanucleus.ConnectionPassword=
DB4O doesn't itself use such URLs so it was necessary to define this DataNucleus-specific way of addressing DB4O.
