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1
21 package com.db4o.test.tuning;
22
23 import com.db4o.*;
24 import com.db4o.query.*;
25 import com.db4o.test.*;
26
27
28
34
35 public class TuningMemberFieldQuery {
36
37 static final int COUNT = 2;
38
39 TMFMember member;
40
41 public TuningMemberFieldQuery(){
42 }
43
44 public TuningMemberFieldQuery(TMFMember member){
45 this.member = member;
46 }
47
48 public void configure() {
49 Db4o.configure().objectClass(this).objectField("member").indexed(true);
50 Db4o.configure().objectClass(TMFMember.class).objectField("name").indexed(true);
51 }
52
53 public void store(){
54 for (int i = 0; i < COUNT; i++) {
55 Test.store(new TuningMemberFieldQuery(new TMFMember("" + i)));
56 }
57 }
58
59 public void test(){
60 Query q = Test.query();
61 q.constrain(TuningMemberFieldQuery.class);
62
63 q.descend("member").descend("name").constrain("1");
64
65
66
67 long start = System.currentTimeMillis();
68 ObjectSet objectSet = q.execute();
69
70 long stop = System.currentTimeMillis();
71
72 Test.ensure(objectSet.size() == 1);
73 TuningMemberFieldQuery tmf = (TuningMemberFieldQuery)objectSet.next();
74 Test.ensure(tmf.member.name.equals("1"));
75
76 long duration = stop - start;
77 System.out.println("Querying " + COUNT + " objects for member identity: " + duration + "ms");
78 }
79
80 public static class TMFMember{
81
82 String  name;
83
84 public TMFMember(){
85 }
86
87 public TMFMember(String name){
88 this.name = name;
89 }
90
91 }
92
93 }
94 |
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