/**
* Stops the server.
*
* @param port server port
* @param eport event port
* @throws IOException I/O exception
*/
public static void stop(final int port, final int eport) throws IOException {
final File stop = stopFile(port);
try {
stop.createNewFile();
new Socket(LOCALHOST, eport).close();
new Socket(LOCALHOST, port).close();
// check if server was really stopped
while (ping(LOCALHOST, port)) Performance.sleep(50);
Performance.sleep(50);
} catch (final IOException ex) {
stop.delete();
throw ex;
}
}
/**
* Test concurrent reader and writer (GH-458).
*
* <p><b>Test case:</b>
*
* <ol>
* <li/>start a long running reader;
* <li/>try to start a writer: it should time out;
* <li/>stop the reader;
* <li/>start the writer again: it should succeed.
* </ol>
*
* @throws Exception error during request execution
*/
@Test
@Ignore("There is no way to stop a query on the server!")
public void testReaderWriter() throws Exception {
final String readerQuery = "?query=(1%20to%20100000000000000)%5b.=1%5d";
final String writerQuery = "/test.xml";
final byte[] content = Token.token("<a/>");
final Get readerAction = new Get(readerQuery);
final Put writerAction = new Put(writerQuery, content);
final ExecutorService exec = Executors.newFixedThreadPool(2);
// start reader
exec.submit(readerAction);
Performance.sleep(TIMEOUT); // delay in order to be sure that the reader has started
// start writer
Future<HTTPResponse> writer = exec.submit(writerAction);
try {
final HTTPResponse result = writer.get(TIMEOUT, TimeUnit.MILLISECONDS);
if (result.status.isSuccess()) fail("Database modified while a reader is running");
throw new Exception(result.toString());
} catch (final TimeoutException e) {
// writer is blocked by the reader: stop it
writerAction.stop = true;
}
// stop reader
readerAction.stop = true;
// start the writer again
writer = exec.submit(writerAction);
assertEquals(HTTPCode.CREATED, writer.get().status);
}
/** Drops users. */
@Test
public void dropUsers() {
no(new DropUser(NAME), testSession);
no(new DropUser(NAME), adminSession);
ok(new Exit(), testSession);
// give the server some time to close the client session
Performance.sleep(50);
ok(new DropUser(NAME), adminSession);
}
@Override
public void run() {
while (text != null) {
flashing ^= true;
panel.repaint();
Performance.sleep(500);
}
flashing = false;
panel.repaint();
}
/** Clean up method. */
@After
public void cleanUp() {
try {
testSession.close();
adminSession.execute(new DropDB(RENAMED));
adminSession.execute(new DropDB(NAME));
adminSession.close();
// give the server some time to clean up the sessions before next test
Performance.sleep(100);
} catch (final Exception ex) {
fail(Util.message(ex));
}
}
@Override
public void run() {
try {
for (int i = 0; i < runs; ++i) {
Performance.sleep((long) (50 * RND.nextDouble()));
// Return nth text of the database
final int n = RND.nextInt() % MAX + 1;
final String qu = Util.info(QUERY, n);
new XQuery(qu).execute(context);
}
} catch (final BaseXException ex) {
ex.printStackTrace();
}
}
/**
* Starts the database server in a separate process.
*
* @param port server port
* @param args command-line arguments
* @throws BaseXException database exception
*/
public static void start(final int port, final String... args) throws BaseXException {
// check if server is already running (needs some time)
if (ping(LOCALHOST, port)) throw new BaseXException(SRV_RUNNING);
Util.start(BaseXServer.class, args);
// try to connect to the new server instance
for (int c = 0; c < 10; ++c) {
if (ping(LOCALHOST, port)) return;
Performance.sleep(100);
}
throw new BaseXException(CONNECTION_ERROR);
}
/**
* Authenticate the user and returns a new client {@link Context} instance.
*
* @return client context
* @throws LoginException login exception
*/
public Context authenticate() throws LoginException {
final byte[] address = token(req.getRemoteAddr());
try {
if (user == null || user.isEmpty() || pass == null || pass.isEmpty())
throw new LoginException(NOPASSWD);
final Context ctx = new Context(context(), null);
ctx.user = ctx.users.get(user);
if (ctx.user == null || !ctx.user.password.equals(md5(pass))) throw new LoginException();
context.blocker.remove(address);
return ctx;
} catch (final LoginException ex) {
// delay users with wrong passwords
for (int d = context.blocker.delay(address); d > 0; d--) Performance.sleep(100);
throw ex;
}
}
@Override
public void run() {
try {
// Perform some queries
for (int i = 0; i < runs; ++i) {
Performance.sleep((long) (50 * RND.nextDouble()));
// Return nth text of the database
final int n = RND.nextInt() % MAX + 1;
final String qu = Util.info(QUERY, n);
session.execute("xquery " + qu);
}
session.close();
} catch (final Exception ex) {
ex.printStackTrace();
}
}
/**
* Test 2 concurrent readers (GH-458).
*
* <p><b>Test case:</b>
*
* <ol>
* <li/>start a long running reader;
* <li/>start a fast reader: it should succeed.
* </ol>
*
* @throws Exception error during request execution
*/
@Test
public void testMultipleReaders() throws Exception {
final String number = "63177";
final String slowQuery = "?query=(1%20to%20100000000000000)%5b.=1%5d";
final String fastQuery = "?query=" + number;
final Get slowAction = new Get(slowQuery);
final Get fastAction = new Get(fastQuery);
final ExecutorService exec = Executors.newFixedThreadPool(2);
exec.submit(slowAction);
Performance.sleep(TIMEOUT); // delay in order to be sure that the reader has started
final Future<HTTPResponse> fast = exec.submit(fastAction);
try {
final HTTPResponse result = fast.get(TIMEOUT, TimeUnit.MILLISECONDS);
assertEquals(HTTPCode.OK, result.status);
assertEquals(number, result.data);
} finally {
slowAction.stop = true;
}
}
/** Exits the session. */
public synchronized void quit() {
running = false;
if (log != null) log.write(this, "LOGOUT " + context.user.name, OK);
// wait until running command was stopped
if (command != null) {
command.stop();
while (command != null) Performance.sleep(50);
}
context.delete(this);
try {
new Close().execute(context);
socket.close();
if (events) {
esocket.close();
// remove this session from all events in pool
for (final Sessions s : context.events.values()) s.remove(this);
}
} catch (final Exception ex) {
if (log != null) log.write(ex.getMessage());
Util.stack(ex);
}
}
/** Stop BaseX HTTP. */
private void stopBaseXHTTP() {
Util.start(BaseXHTTP.class, "stop");
Performance.sleep(TIMEOUT); // give the server some time to stop
}
/** Start BaseX HTTP. */
private void startBaseXHTTP() {
Util.start(BaseXHTTP.class, "-U" + UserText.ADMIN, "-P" + UserText.ADMIN);
Performance.sleep(TIMEOUT); // give the server some time to stop
}
/**
* Constructor.
*
* @param ctx database context
* @param args command-line arguments
* @throws IOException I/O exception
*/
public BaseXServer(final Context ctx, final String... args) throws IOException {
super(args, ctx);
final MainProp mprop = context.mprop;
final int port = mprop.num(MainProp.SERVERPORT);
final int eport = mprop.num(MainProp.EVENTPORT);
// check if ports are distinct
if (port == eport) throw new BaseXException(PORT_TWICE_X, port);
final String host = mprop.get(MainProp.SERVERHOST);
final InetAddress addr = host.isEmpty() ? null : InetAddress.getByName(host);
if (service) {
start(port, args);
Util.outln(SRV_STARTED);
Performance.sleep(1000);
return;
}
if (stopped) {
stop(port, eport);
Util.outln(SRV_STOPPED);
Performance.sleep(1000);
return;
}
try {
// execute command-line arguments
for (final String c : commands) execute(c);
log = new Log(context, quiet);
log.write(SRV_STARTED);
socket = new ServerSocket();
socket.setReuseAddress(true);
socket.bind(new InetSocketAddress(addr, port));
esocket = new ServerSocket();
esocket.setReuseAddress(true);
esocket.bind(new InetSocketAddress(addr, eport));
stop = stopFile(port);
// show info when server is aborted
Runtime.getRuntime()
.addShutdownHook(
new Thread() {
@Override
public void run() {
log.write(SRV_STOPPED);
log.close();
Util.outln(SRV_STOPPED);
}
});
new Thread(this).start();
while (!running) Performance.sleep(100);
Util.outln(CONSOLE + (console ? TRY_MORE_X : SRV_STARTED), SERVERMODE);
if (console) {
console();
quit();
}
} catch (final IOException ex) {
if (log != null) log.write(ex.getMessage());
throw ex;
}
}
