01: /* Copyright (C) 2004 - 2007 db4objects Inc. http://www.db4o.com
02:
03: This file is part of the db4o open source object database.
04:
05: db4o is free software; you can redistribute it and/or modify it under
06: the terms of version 2 of the GNU General Public License as published
07: by the Free Software Foundation and as clarified by db4objects' GPL
08: interpretation policy, available at
09: http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
10: Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
11: Suite 350, San Mateo, CA 94403, USA.
12:
13: db4o is distributed in the hope that it will be useful, but WITHOUT ANY
14: WARRANTY; without even the implied warranty of MERCHANTABILITY or
15: FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16: for more details.
17:
18: You should have received a copy of the GNU General Public License along
19: with this program; if not, write to the Free Software Foundation, Inc.,
20: 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21: package com.db4o.diagnostic;
22:
23: /**
24: * provides methods to configure the behaviour of db4o diagnostics.
25: * <br><br>Diagnostic system can be enabled on a running db4o database
26: * to notify a user about possible problems or misconfigurations.
27: * Diagnostic listeners can be be added and removed with calls
28: * to this interface.
29: * To install the most basic listener call:<br>
30: * <code>Db4o.configure().diagnostic().addListener(new DiagnosticToConsole());</code>
31: * @see com.db4o.config.Configuration#diagnostic()
32: * @see DiagnosticListener
33: */
34: public interface DiagnosticConfiguration {
35:
36: /**
37: * adds a DiagnosticListener to listen to Diagnostic messages.
38: */
39: public void addListener(DiagnosticListener listener);
40:
41: /**
42: * removes all DiagnosticListeners.
43: */
44: public void removeAllListeners();
45: }
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