static void sessionStopped(Session a_session) {
i_sessions.remove(a_session);
}
/**
* opens an {@link ObjectContainer ObjectContainer} on the specified database file for local use.
* <br>
* <br>
* Subsidiary calls with the same database file name will return the same {@link ObjectContainer
* ObjectContainer} object.<br>
* <br>
* Every call to <code>openFile()</code> requires a corresponding {@link ObjectContainer#close
* ObjectContainer.close}.<br>
* <br>
* Database files can only be accessed for readwrite access from one process (one Java VM) at one
* time. All versions except for db4o mobile edition use an internal mechanism to lock the
* database file for other processes. <br>
* <br>
*
* @param databaseFileName the full path to the database file
* @return an open {@link ObjectContainer ObjectContainer}
* @see Configuration#readOnly
* @see Configuration#encrypt
* @see Configuration#password
*/
public static final ObjectContainer openFile(String databaseFileName)
throws DatabaseFileLockedException {
synchronized (Db4o.lock) {
return i_sessions.open(databaseFileName);
}
}
static void forEachSession(Visitor4 visitor) {
i_sessions.forEach(visitor);
}