@Override
public void test() throws Exception {
if (!SysProperties.MODIFY_ON_WRITE) {
return;
}
deleteDb("modifyOnWrite");
String dbFile = getBaseDir() + "/modifyOnWrite.h2.db";
assertFalse(FileUtils.exists(dbFile));
Connection conn = getConnection("modifyOnWrite");
Statement stat = conn.createStatement();
stat.execute("create table test(id int)");
conn.close();
byte[] test = IOUtils.readBytesAndClose(FileUtils.newInputStream(dbFile), -1);
conn = getConnection("modifyOnWrite");
stat = conn.createStatement();
ResultSet rs;
rs = stat.executeQuery("select * from test");
assertFalse(rs.next());
conn.close();
assertTrue(FileUtils.exists(dbFile));
byte[] test2 = IOUtils.readBytesAndClose(FileUtils.newInputStream(dbFile), -1);
assertEquals(test, test2);
conn = getConnection("modifyOnWrite");
stat = conn.createStatement();
stat.execute("insert into test values(1)");
conn.close();
conn = getConnection("modifyOnWrite");
stat = conn.createStatement();
rs = stat.executeQuery("select * from test");
assertTrue(rs.next());
conn.close();
test2 = IOUtils.readBytesAndClose(FileUtils.newInputStream(dbFile), -1);
assertFalse(Utils.compareSecure(test, test2));
}
private boolean openWriter() {
if (printWriter == null) {
try {
FileUtils.createDirectories(FileUtils.getParent(fileName));
if (FileUtils.exists(fileName) && !FileUtils.canWrite(fileName)) {
// read only database: don't log error if the trace file
// can't be opened
return false;
}
fileWriter = IOUtils.getBufferedWriter(FileUtils.newOutputStream(fileName, true));
printWriter = new PrintWriter(fileWriter, true);
} catch (Exception e) {
logWritingError(e);
return false;
}
}
return true;
}
@Override
public FileStore openFile(String name, String mode, boolean mustExist) {
if (mustExist && !FileUtils.exists(name)) {
throw DbException.get(ErrorCode.FILE_NOT_FOUND_1, name);
}
FileStore store;
if (cipher == null) {
store = FileStore.open(this, name, mode);
} else {
store = FileStore.open(this, name, mode, cipher, fileEncryptionKey, 0);
}
store.setCheckedWriting(false);
try {
store.init();
} catch (DbException e) {
store.closeSilently();
throw e;
}
return store;
}
/**
* Get the unique and normalized database name (excluding settings).
*
* @return the database name
*/
public String getName() {
if (!persistent) {
return name;
}
if (nameNormalized == null) {
if (!SysProperties.IMPLICIT_RELATIVE_PATH) {
if (!FileUtils.isAbsolute(name)) {
if (name.indexOf("./") < 0
&& name.indexOf(".\\") < 0
&& name.indexOf(":/") < 0
&& name.indexOf(":\\") < 0) {
// the name could start with "./", or
// it could start with a prefix such as "nio:./"
// for Windows, the path "\test" is not considered
// absolute as the drive letter is missing,
// but we consider it absolute
throw DbException.get(ErrorCode.URL_RELATIVE_TO_CWD, originalURL);
}
}
}
String suffix = Constants.SUFFIX_PAGE_FILE;
String n;
if (FileUtils.exists(name + suffix)) {
n = FileUtils.toRealPath(name + suffix);
} else {
suffix = Constants.SUFFIX_MV_FILE;
n = FileUtils.toRealPath(name + suffix);
}
String fileName = FileUtils.getName(n);
if (fileName.length() < suffix.length() + 1) { // 例如: 没有设置baseDir且dbName="./"时
throw DbException.get(ErrorCode.INVALID_DATABASE_NAME_1, name);
}
nameNormalized = n.substring(0, n.length() - suffix.length());
}
return nameNormalized;
}
/**
* Restores database files.
*
* @param zipFileName the name of the backup file
* @param directory the directory name
* @param db the database name (null for all databases)
* @throws DbException if there is an IOException
*/
public static void execute(String zipFileName, String directory, String db) {
InputStream in = null;
try {
if (!FileUtils.exists(zipFileName)) {
throw new IOException("File not found: " + zipFileName);
}
String originalDbName = null;
int originalDbLen = 0;
if (db != null) {
originalDbName = getOriginalDbName(zipFileName, db);
if (originalDbName == null) {
throw new IOException("No database named " + db + " found");
}
if (originalDbName.startsWith(SysProperties.FILE_SEPARATOR)) {
originalDbName = originalDbName.substring(1);
}
originalDbLen = originalDbName.length();
}
in = FileUtils.newInputStream(zipFileName);
ZipInputStream zipIn = new ZipInputStream(in);
while (true) {
ZipEntry entry = zipIn.getNextEntry();
if (entry == null) {
break;
}
String fileName = entry.getName();
// restoring windows backups on linux and vice versa
fileName = fileName.replace('\\', SysProperties.FILE_SEPARATOR.charAt(0));
fileName = fileName.replace('/', SysProperties.FILE_SEPARATOR.charAt(0));
if (fileName.startsWith(SysProperties.FILE_SEPARATOR)) {
fileName = fileName.substring(1);
}
boolean copy = false;
if (db == null) {
copy = true;
} else if (fileName.startsWith(originalDbName + ".")) {
fileName = db + fileName.substring(originalDbLen);
copy = true;
}
if (copy) {
OutputStream o = null;
try {
o =
FileUtils.newOutputStream(
directory + SysProperties.FILE_SEPARATOR + fileName, false);
IOUtils.copy(zipIn, o);
o.close();
} finally {
IOUtils.closeSilently(o);
}
}
zipIn.closeEntry();
}
zipIn.closeEntry();
zipIn.close();
} catch (IOException e) {
throw DbException.convertIOException(e, zipFileName);
} finally {
IOUtils.closeSilently(in);
}
}
private void testTools() throws Exception {
if (config.memory) {
return;
}
deleteDb("web");
Connection conn = getConnection("web");
conn.createStatement().execute("create table test(id int) as select 1");
conn.close();
Server server = new Server();
server.setOut(new PrintStream(new ByteArrayOutputStream()));
server.runTool("-web", "-webPort", "8182", "-properties", "null", "-tcp", "-tcpPort", "9101");
try {
String url = "http://localhost:8182";
WebClient client;
String result;
client = new WebClient();
result = client.get(url);
client.readSessionId(result);
result = client.get(url, "tools.jsp");
FileUtils.delete(getBaseDir() + "/backup.zip");
result =
client.get(
url,
"tools.do?tool=Backup&args=-dir,"
+ getBaseDir()
+ ",-db,web,-file,"
+ getBaseDir()
+ "/backup.zip");
deleteDb("web");
assertTrue(FileUtils.exists(getBaseDir() + "/backup.zip"));
result =
client.get(url, "tools.do?tool=DeleteDbFiles&args=-dir," + getBaseDir() + ",-db,web");
assertFalse(FileUtils.exists(getBaseDir() + "/web.h2.db"));
result =
client.get(
url,
"tools.do?tool=Restore&args=-dir,"
+ getBaseDir()
+ ",-db,web,-file,"
+ getBaseDir()
+ "/backup.zip");
assertTrue(FileUtils.exists(getBaseDir() + "/web.h2.db"));
FileUtils.delete(getBaseDir() + "/web.h2.sql");
FileUtils.delete(getBaseDir() + "/backup.zip");
result = client.get(url, "tools.do?tool=Recover&args=-dir," + getBaseDir() + ",-db,web");
assertTrue(FileUtils.exists(getBaseDir() + "/web.h2.sql"));
FileUtils.delete(getBaseDir() + "/web.h2.sql");
result =
client.get(
url,
"tools.do?tool=RunScript&args=-script,"
+ getBaseDir()
+ "/web.h2.sql,-url,"
+ getURL("web", true)
+ ",-user,"
+ getUser()
+ ",-password,"
+ getPassword());
FileUtils.delete(getBaseDir() + "/web.h2.sql");
assertTrue(FileUtils.exists(getBaseDir() + "/web.h2.db"));
deleteDb("web");
} finally {
server.shutdown();
}
}
private void testStopWhileCommitting() throws Exception {
String fileName = getBaseDir() + "/testStopWhileCommitting.h3";
FileUtils.delete(fileName);
Random r = new Random(0);
for (int i = 0; i < 10; ) {
MVStore s;
TransactionStore ts;
Transaction tx;
TransactionMap<Integer, String> m;
s = MVStore.open(fileName);
ts = new TransactionStore(s);
tx = ts.begin();
s.setReuseSpace(false);
m = tx.openMap("test");
final String value = "x" + i;
for (int j = 0; j < 1000; j++) {
m.put(j, value);
}
final AtomicInteger state = new AtomicInteger();
final MVStore store = s;
final MVMap<Integer, String> other = s.openMap("other");
Task task =
new Task() {
@Override
public void call() throws Exception {
for (int i = 0; !stop; i++) {
state.set(i);
other.put(i, value);
store.commit();
}
}
};
task.execute();
// wait for the task to start
while (state.get() < 1) {
Thread.yield();
}
// commit while writing in the task
tx.commit();
// wait for the task to stop
task.get();
store.close();
s = MVStore.open(fileName);
// roll back a bit, until we have some undo log entries
assertTrue(s.hasMap("undoLog"));
for (int back = 0; back < 100; back++) {
int minus = r.nextInt(10);
s.rollbackTo(Math.max(0, s.getCurrentVersion() - minus));
MVMap<?, ?> undo = s.openMap("undoLog");
if (undo.size() > 0) {
break;
}
}
ts = new TransactionStore(s);
List<Transaction> list = ts.getOpenTransactions();
if (list.size() != 0) {
tx = list.get(0);
if (tx.getStatus() == Transaction.STATUS_COMMITTING) {
i++;
}
}
s.close();
FileUtils.delete(fileName);
assertFalse(FileUtils.exists(fileName));
}
}