1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.collections;
import org.junit.jupiter.api.Test;
import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.concurrent.atomic.AtomicBoolean;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotSame;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertSame;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;
class MethodCacheTest {
@Test
void testCache() throws Exception {
URL url = MethodCacheTest.class.getClassLoader().getResource("dummy").toURI().resolve(".").toURL();
class MyLoader extends URLClassLoader {
MyLoader() { super(new URL[] { url }, MethodCacheTest.class.getClassLoader()); }
public Class<?> loadClass(String name) throws ClassNotFoundException {
if (name.equals(Dummy.class.getName())) synchronized (getClassLoadingLock(name)) { return findClass(name); }
else return super.loadClass(name);
}
}
try (MyLoader myLoader = new MyLoader()) {
Class<?> applicationClass = Dummy.class;
Class<?> customClass = myLoader.loadClass(Dummy.class.getName());
assertNotSame(applicationClass, customClass);
assertSame(applicationClass.getName(), customClass.getName());
MethodCache methods = new MethodCache("clone");
AtomicBoolean updatedCache = new AtomicBoolean();
Object applicationDummy = applicationClass.getConstructor().newInstance();
Object customDummy = customClass.getConstructor().newInstance();
Method applicationMethod = methods.get(applicationDummy, __ -> updatedCache.set(true));
assertTrue(updatedCache.getAndSet(false), "cache was updated");
Method cachedApplicationMethod = methods.get(applicationDummy, __ -> updatedCache.set(true));
assertFalse(updatedCache.getAndSet(false), "cache was updated");
Method customMethod = methods.get(customDummy, __ -> updatedCache.set(true));
assertTrue(updatedCache.getAndSet(false), "cache was updated");
Method cachedCustomMethod = methods.get(customDummy, __ -> updatedCache.set(true));
assertFalse(updatedCache.getAndSet(false), "cache was updated");
assertSame(applicationMethod, cachedApplicationMethod);
assertNotSame(applicationMethod, customMethod);
assertSame(customMethod, cachedCustomMethod);
cachedApplicationMethod.invoke(applicationDummy);
cachedCustomMethod.invoke(customDummy);
assertThrows(IllegalArgumentException.class, () -> applicationMethod.invoke(customDummy));
assertThrows(IllegalArgumentException.class, () -> customMethod.invoke(applicationDummy));
Object noDummy = new NoDummy();
Method noMethod = methods.get(noDummy, __ -> updatedCache.set(true));
assertTrue(updatedCache.getAndSet(false), "cache was updated");
assertNull(noMethod);
Method cachedNoMethod = methods.get(noDummy, __ -> updatedCache.set(true));
assertFalse(updatedCache.getAndSet(false), "cache was updated");
assertNull(cachedNoMethod);
}
}
public static class NoDummy implements Cloneable { }
public static class Dummy implements Cloneable {
public Object clone() throws CloneNotSupportedException { return super.clone(); }
}
}
|
