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.db4ounit.common.concurrency;
22:
23: import com.db4o.*;
24: import com.db4o.ext.*;
25: import com.db4o.query.*;
26:
27: import db4ounit.*;
28: import db4ounit.extensions.*;
29:
30: public class PeekPersistedTestCase extends Db4oClientServerTestCase {
31:
32: public static void main(String[] args) {
33: new PeekPersistedTestCase().runConcurrency();
34: }
35:
36: public String name;
37:
38: public PeekPersistedTestCase child;
39:
40: protected void store() {
41: PeekPersistedTestCase current = this ;
42: current.name = "1";
43: for (int i = 2; i < 11; i++) {
44: current.child = new PeekPersistedTestCase();
45: current.child.name = "" + i;
46: current = current.child;
47: }
48: store(this );
49: }
50:
51: public void conc(ExtObjectContainer oc) {
52: Query q = oc.query();
53: q.constrain(PeekPersistedTestCase.class);
54: q.descend("name").constrain("1");
55: ObjectSet objectSet = q.execute();
56: PeekPersistedTestCase pp = (PeekPersistedTestCase) objectSet
57: .next();
58: for (int i = 0; i < 10; i++) {
59: peek(oc, pp, i);
60: }
61: }
62:
63: private void peek(ExtObjectContainer oc,
64: PeekPersistedTestCase original, int depth) {
65: PeekPersistedTestCase peeked = (PeekPersistedTestCase) oc
66: .peekPersisted(original, depth, true);
67: for (int i = 0; i <= depth; i++) {
68: Assert.isNotNull(peeked);
69: Assert.isFalse(oc.isStored(peeked));
70: peeked = peeked.child;
71: }
72: Assert.isNull(peeked);
73: }
74:
75: }
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