/**
* 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);
}
/**
* 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;
}
}
private Future sendDataUdp(final InetSocketAddress clientLocation, final String employee) {
return executor.submit(
new Runnable() {
public void run() {
try {
Thread.sleep(SECONDS.toMillis(1));
DatagramSocket clientSocket = new DatagramSocket();
byte[] sendDataServer = serialize((String) employee);
DatagramPacket pongPacket =
new DatagramPacket(sendDataServer, sendDataServer.length, clientLocation);
clientSocket.send(pongPacket);
clientSocket.close();
} catch (IOException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
});
}
/**
* Test concurrent writers (GH-458).
*
* <p><b>Test case:</b>
*
* <ol>
* <li/>start several writers one after another;
* <li/>all writers should succeed.
* </ol>
*
* @throws Exception error during request execution
*/
@Test
public void testMultipleWriters() throws Exception {
final int count = 10;
final String template =
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
+ "<command xmlns=\"http://basex.org/rest\"><text><![CDATA["
+ "ADD TO %1$d <node id=\"%1$d\"/>"
+ "]]></text></command>";
@SuppressWarnings("unchecked")
final Future<HTTPResponse>[] tasks = new Future[count];
final ExecutorService exec = Executors.newFixedThreadPool(count);
// start all writers (not at the same time, but still in parallel)
for (int i = 0; i < count; i++) {
final String command = String.format(template, i);
tasks[i] = exec.submit(new Post("", Token.token(command)));
}
// check if all have finished successfully
for (final Future<HTTPResponse> task : tasks) {
assertEquals(HTTPCode.OK, task.get(TIMEOUT, TimeUnit.MILLISECONDS).status);
}
}
/**
* Discover WS device on the local network
*
* @return list of unique devices access strings which might be URLs in most cases
*/
public static Collection<String> discoverWsDevices() {
final Collection<String> addresses = new ConcurrentSkipListSet<>();
final CountDownLatch serverStarted = new CountDownLatch(1);
final CountDownLatch serverFinished = new CountDownLatch(1);
final Collection<InetAddress> addressList = new ArrayList<>();
try {
final Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
if (interfaces != null) {
while (interfaces.hasMoreElements()) {
NetworkInterface anInterface = interfaces.nextElement();
if (!anInterface.isLoopback()) {
final List<InterfaceAddress> interfaceAddresses = anInterface.getInterfaceAddresses();
for (InterfaceAddress address : interfaceAddresses) {
addressList.add(address.getAddress());
}
}
}
}
} catch (SocketException e) {
e.printStackTrace();
}
ExecutorService executorService = Executors.newCachedThreadPool();
for (final InetAddress address : addressList) {
Runnable runnable =
new Runnable() {
public void run() {
try {
final String uuid = UUID.randomUUID().toString();
final String probe =
WS_DISCOVERY_PROBE_MESSAGE.replaceAll(
"<wsa:MessageID>urn:uuid:.*</wsa:MessageID>",
"<wsa:MessageID>urn:uuid:" + uuid + "</wsa:MessageID>");
final int port = random.nextInt(20000) + 40000;
@SuppressWarnings("SocketOpenedButNotSafelyClosed")
final DatagramSocket server = new DatagramSocket(port, address);
new Thread() {
public void run() {
try {
final DatagramPacket packet = new DatagramPacket(new byte[4096], 4096);
server.setSoTimeout(WS_DISCOVERY_TIMEOUT);
long timerStarted = System.currentTimeMillis();
while (System.currentTimeMillis() - timerStarted < (WS_DISCOVERY_TIMEOUT)) {
serverStarted.countDown();
server.receive(packet);
final Collection<String> collection =
parseSoapResponseForUrls(
Arrays.copyOf(packet.getData(), packet.getLength()));
for (String key : collection) {
addresses.add(key);
}
}
} catch (SocketTimeoutException ignored) {
} catch (Exception e) {
e.printStackTrace();
} finally {
serverFinished.countDown();
server.close();
}
}
}.start();
try {
serverStarted.await(1000, TimeUnit.MILLISECONDS);
} catch (InterruptedException e) {
e.printStackTrace();
}
if (address instanceof Inet4Address) {
server.send(
new DatagramPacket(
probe.getBytes(),
probe.length(),
InetAddress.getByName(WS_DISCOVERY_ADDRESS_IPv4),
WS_DISCOVERY_PORT));
} else {
server.send(
new DatagramPacket(
probe.getBytes(),
probe.length(),
InetAddress.getByName(WS_DISCOVERY_ADDRESS_IPv6),
WS_DISCOVERY_PORT));
}
} catch (Exception e) {
e.printStackTrace();
}
try {
serverFinished.await((WS_DISCOVERY_TIMEOUT), TimeUnit.MILLISECONDS);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
};
executorService.submit(runnable);
}
try {
executorService.shutdown();
executorService.awaitTermination(WS_DISCOVERY_TIMEOUT + 2000, TimeUnit.MILLISECONDS);
} catch (InterruptedException ignored) {
}
return addresses;
}
