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.test.performance;
22:
23: import java.io.File;
24:
25: import com.db4o.Db4o;
26: import com.db4o.ObjectContainer;
27: import com.db4o.ObjectSet;
28: import com.db4o.io.RandomAccessFileAdapter;
29:
30: /**
31: * @exclude
32: */
33: public class CreateSomeData {
34: public static final int DEPTH = 3;
35:
36: public static final int COUNT = 10;
37:
38: public static int c = 100;
39:
40: public static class SomeData {
41: public int id;
42:
43: public SomeData _parent;
44:
45: public SomeData(int id, SomeData parent) {
46: this .id = id;
47: this ._parent = parent;
48: }
49:
50: public String toString() {
51: return " " + id;
52: }
53: }
54:
55: public static void main(String[] args) {
56: new File(Util.BENCHFILE).delete();
57: new File(Util.DBFILE).delete();
58: Db4o.configure().io(
59: new RecordingIoAdapter(new RandomAccessFileAdapter(),
60: Util.BENCHFILE));
61: Db4o.configure().optimizeNativeQueries(true);
62: ObjectContainer db = Db4o.openFile(Util.DBFILE);
63:
64: long start = System.currentTimeMillis();
65:
66: for (int i = 1; i <= COUNT; i++) {
67: SomeData obj = new SomeData(i, null);
68:
69: for (int j = 0; j < DEPTH; j++) {
70: obj = new SomeData(c++, obj);
71: }
72: db.set(obj);
73:
74: }
75: db.commit();
76: System.err.println("to store " + (COUNT + COUNT * DEPTH)
77: + " objects needed "
78: + (System.currentTimeMillis() - start));
79: System.gc();
80: start = System.currentTimeMillis();
81: ObjectSet result = db.query(SomeData.class);
82: while (result.hasNext()) {
83: System.out.println(result.next());
84: }
85:
86: // System.out.println(result.size());
87: System.err.println("to query and retrive " + result.size()
88: + " objects needed "
89: + (System.currentTimeMillis() - start));
90: db.close();
91: }
92: }
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