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
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2002,2010 Oracle. All rights reserved.
*
* $Id: FSyncManagerTest.java,v 1.13.2.2 2010/01/04 15:30:44 cwl Exp $
*/
package com.sleepycat.je.log;
import java.io.File;
import junit.framework.TestCase;
import com.sleepycat.je.DatabaseException;
import com.sleepycat.je.DbInternal;
import com.sleepycat.je.Environment;
import com.sleepycat.je.EnvironmentConfig;
import com.sleepycat.je.config.EnvironmentParams;
import com.sleepycat.je.dbi.EnvironmentImpl;
import com.sleepycat.je.junit.JUnitThread;
import com.sleepycat.je.util.TestUtils;
/**
* Exercise the synchronization aspects of the sync manager.
*/
public class FSyncManagerTest extends TestCase {
private File envHome;
public FSyncManagerTest() {
super();
envHome = new File(System.getProperty(TestUtils.DEST_DIR));
}
protected void setUp()
throws Exception {
/* Remove files to start with a clean slate. */
TestUtils.removeLogFiles("Setup", envHome, false);
}
protected void tearDown()
throws Exception {
TestUtils.removeLogFiles("TearDown", envHome, false);
}
public void testBasic()
throws Throwable{
Environment env = null;
try {
EnvironmentConfig envConfig = TestUtils.initEnvConfig();
envConfig.setConfigParam(EnvironmentParams.LOG_FSYNC_TIMEOUT.getName(),
"50000000");
envConfig.setAllowCreate(true);
env = new Environment(envHome, envConfig);
WaitVal waitVal = new WaitVal(0);
FSyncManager syncManager =
new TestSyncManager(DbInternal.envGetEnvironmentImpl(env),
waitVal);
JUnitThread t1 = new TestSyncThread(syncManager);
JUnitThread t2 = new TestSyncThread(syncManager);
JUnitThread t3 = new TestSyncThread(syncManager);
t1.start();
t2.start();
t3.start();
/* Wait for all threads to request a sync, so they form a group.*/
Thread.sleep(500);
/* Free thread 1. */
synchronized (waitVal) {
waitVal.value = 1;
waitVal.notify();
}
t1.join();
t2.join();
t3.join();
/*
* All three threads ask for fsyncs.
* 2 do fsyncs -- the initial leader, and the leader of the
* waiting group of 2.
* The last thread gets a free ride.
*/
assertEquals(3, syncManager.getNFSyncRequests());
assertEquals(2, syncManager.getNFSyncs());
assertEquals(0, syncManager.getNTimeouts());
} finally {
if (env != null) {
env.close();
}
}
}
/* This test class waits for an object instead of executing a sync.
* This way, we can manipulate grouping behavior.
*/
class TestSyncManager extends FSyncManager {
private WaitVal waitVal;
TestSyncManager(EnvironmentImpl env, WaitVal waitVal)
throws DatabaseException {
super(env);
this.waitVal = waitVal;
}
protected void executeFSync()
throws DatabaseException {
try {
synchronized (waitVal) {
if (waitVal.value < 1) {
waitVal.wait();
}
}
} catch (InterruptedException e) {
// woken up.
}
}
}
class TestSyncThread extends JUnitThread {
private FSyncManager syncManager;
TestSyncThread(FSyncManager syncManager) {
super("syncThread");
this.syncManager = syncManager;
}
public void testBody()
throws Throwable {
syncManager.fsync();
}
}
class WaitVal {
public int value;
WaitVal(int value) {
this.value = value;
}
}
}
|
