KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > com > db4o > test > performance > IndexQueryingIsFast


1 /* Copyright (C) 2004 - 2006 db4objects Inc. http://www.db4o.com
2
3 This file is part of the db4o open source object database.
4
5 db4o is free software; you can redistribute it and/or modify it under
6 the terms of version 2 of the GNU General Public License as published
7 by the Free Software Foundation and as clarified by db4objects' GPL
8 interpretation policy, available at
9 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 com.db4o.*;
24 import com.db4o.config.*;
25 import com.db4o.query.*;
26 import com.db4o.test.*;
27
28
29 public class IndexQueryingIsFast {
30     
31     public int _int;
32     
33     public String JavaDoc _string;
34     
35     public IndexQueryingIsFast() {
36         
37     }
38     
39     public IndexQueryingIsFast(int i, String JavaDoc str) {
40         _int = i;
41         _string = str;
42     }
43
44     public void configure(){
45         ObjectClass oc = Db4o.configure().objectClass(this.getClass());
46         oc.objectField("_int").indexed(true);
47         oc.objectField("_string").indexed(true);
48     }
49     
50     public void store(){
51         Test.deleteAllInstances(this);
52         for (int i = 0; i < 5000; i++) {
53             Test.store(new IndexQueryingIsFast(i, "" + i));
54         }
55     }
56     
57     public void test(){
58         
59         Query q = Test.query();
60         q.constrain(IndexQueryingIsFast.class);
61         q.descend("_int").constrain(new Integer JavaDoc(3));
62         check(q);
63         
64         q = Test.query();
65         q.constrain(IndexQueryingIsFast.class);
66         q.descend("_string").constrain("3");
67         check(q);
68         
69         
70     }
71
72     private void check(Query q) {
73         long start = System.currentTimeMillis();
74         ObjectSet objectSet = q.execute();
75         long stop = System.currentTimeMillis();
76         Test.ensure(objectSet.size() == 1);
77         IndexQueryingIsFast iqiF = (IndexQueryingIsFast) objectSet.next();
78         Test.ensure(iqiF._int == 3);
79         long duration = stop - start;
80         long max = Test.isClientServer() ? 250 : 50;
81         Test.ensure(duration < max);
82         if(duration >= max){
83             System.out.println("Indexed query too slow: " + duration + "ms");
84         }
85         
86     }
87     
88     
89     
90
91 }
92
Popular Tags