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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
38
39 public class TuningIdentityQuery {
40
41 static final int COUNT = 10000;
42
43 TIMember member;
44
45 public TuningIdentityQuery(){
46 }
47
48 public TuningIdentityQuery(TIMember member){
49 this.member = member;
50 }
51
52 public void configure() {
53 Db4o.configure().objectClass(this).objectField("member").indexed(true);
54 }
55
56 public void store(){
57 for (int i = 0; i < COUNT; i++) {
58 Test.store(new TuningIdentityQuery(new TIMember("" + i)));
59 }
60 }
61
62 public void test(){
63 Query q = Test.query();
64 q.constrain(TIMember.class);
65 ObjectSet objectSet = q.execute();
66 TIMember member = (TIMember) objectSet.next();
67 q = Test.query();
68 q.constrain(TuningIdentityQuery.class);
69 q.descend("member").constrain(member).identity();
70
71 long start = System.currentTimeMillis();
72 objectSet = q.execute();
73
74 long stop = System.currentTimeMillis();
75
76 Test.ensure(objectSet.size() == 1);
77 TuningIdentityQuery ti = (TuningIdentityQuery)objectSet.next();
78 Test.ensure(ti.member == member);
79
80 long duration = stop - start;
81 System.out.println("Querying " + COUNT + " objects for member identity: " + duration + "ms");
82 }
83
84 public static class TIMember{
85
86 String  name;
87
88 public TIMember(){
89
90 }
91
92 public TIMember(String name){
93 this.name = name;
94 }
95
96 }
97
98
99 }
100 |
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