public Container buildContainer(String containerClass) {
notNull(
containerClass,
"Container type " + Arrays.deepToString(Server.values()) + " or container class");
Class<Container> clazz = null;
for (Server container : Server.values()) {
if (container.name().equalsIgnoreCase(containerClass)) {
clazz = loadServerClass(container.serverClass());
break;
}
}
if (clazz == null) clazz = loadServerClass(containerClass);
try {
return clazz
.getConstructor(ContainerConfiguration.class)
.newInstance(ContainerConfiguration.from(this));
} catch (InvocationTargetException e) {
if (e.getTargetException() instanceof RuntimeException)
throw (RuntimeException) e.getTargetException();
else throw new RuntimeException(e.getTargetException().getMessage(), e.getTargetException());
} catch (Exception e) {
throw new IllegalArgumentException(
"Cannot instanciate class ["
+ clazz
+ "]. Ensure there is a public constructor having a parameter of type "
+ ContainerConfiguration.class.getName(),
e);
}
}
public void setContent(byte[] cntnt) throws Exception {
StringBuffer sb = new StringBuffer(isHTTP11 ? "HTTP/1.1" : "HTTP/1.0");
sb.append(OK_HDR);
sb.append("Content-Type: ");
sb.append(contentType);
if (!isHTTP11 || !keepAlive || isMessages) {
sb.append("\r\nConnection: close\r\nProxy-Connection: close");
} else {
sb.append("\r\nConnection: Keep-Alive\r\nProxy-Connection: Keep-Alive");
sb.append("\r\nContent-Length: ");
sb.append(cntnt.length);
}
sb.append("\r\n\r\n");
sb.trimToSize();
CharBuffer cb = CharBuffer.wrap(sb.toString());
ByteBuffer tempBuffer;
try {
tempBuffer = Charset.forName("iso-8859-1").newEncoder().encode(cb);
} catch (CharacterCodingException cce) {
Server.debug(this, "prepareForSending: ", cce, Server.MSG_ERROR, Server.LVL_MINOR);
try {
tempBuffer = ByteBuffer.wrap(cb.toString().getBytes(Server.srv.DEFAULT_CHARSET));
} catch (Exception e) {
Server.debug(this, "prepareForSending: ", e, Server.MSG_ERROR, Server.LVL_MAJOR);
throw e;
}
}
this.buf = ByteBuffer.allocate(tempBuffer.capacity() + cntnt.length);
this.buf.put(tempBuffer.array());
this.buf.put(cntnt);
this.buf.flip();
}
private String getSocketIn() {
try {
String s = "";
while (true) {
int count = socket_in.read(buffer);
if (count < 0) {
for (Iterator<Server> it = servers.iterator(); it.hasNext(); ) {
Server server = it.next();
if (server.host.equals(host)) {
server.deleteThis();
break;
}
}
deleteThis();
Bundle bundle = new Bundle();
bundle.putInt(Constants.CLIENTS_STATUS, Constants.CLIENTS_STATUS_UPDATE_STATUS);
Message msg = new Message();
msg.setData(bundle);
MainActivity.this.clientMessageHandler.sendMessage(msg);
return null;
}
s += new String(buffer, 0, count);
if (s.endsWith("\n")) {
s = s.substring(0, s.length() - 1);
break;
}
}
return s;
} catch (Exception e) {
return null;
}
}
@Override
@Transactional
public Application start(Application application) throws ServiceException {
try {
User user = authentificationUtils.getAuthentificatedUser();
logger.debug("start : Methods parameters : " + application);
List<Module> modules = application.getModules();
for (Module module : modules) {
try {
module = moduleService.startModule(module);
} catch (ServiceException e) {
logger.error("failed to start " + application.toString(), e);
}
}
List<Server> servers = application.getServers();
for (Server server : servers) {
logger.info("old server ip : " + server.getContainerIP());
server = serverService.startServer(server);
}
if (application.getAliases() != null && !application.getAliases().isEmpty()) {
updateAliases(application);
}
logger.info("ApplicationService : Application successfully started ");
} catch (PersistenceException e) {
throw new ServiceException(e.getLocalizedMessage(), e);
}
return application;
}
@Override
public void run() {
ConnectivityManager connMgr =
(ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();
if ((networkInfo == null)
|| (!networkInfo.isConnected())
|| (networkInfo.getType() != ConnectivityManager.TYPE_WIFI)) {
bundle.putInt(
Constants.SERVER_THREAD_STATUS, Constants.SERVER_THREAD_STATUS_WIFI_NOT_CONNECTED);
msg.setData(bundle);
MainActivity.this.serverThreadMessageHandler.sendMessage(msg);
return;
}
WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
WifiInfo wifiInfo = wifiManager.getConnectionInfo();
int ipAddress = wifiInfo.getIpAddress();
String ip =
(ipAddress & 0xff)
+ "."
+ (ipAddress >> 8 & 0xff)
+ "."
+ (ipAddress >> 16 & 0xff)
+ "."
+ (ipAddress >> 24 & 0xff);
try {
serverSocket = new ServerSocket(Constants.SERVER_PORT);
bundle.putInt(Constants.SERVER_THREAD_STATUS, Constants.SERVER_THREAD_STATUS_LISTENING);
bundle.putString(Constants.IP_ADDRESS, ip);
msg.setData(bundle);
MainActivity.this.serverThreadMessageHandler.sendMessage(msg);
} catch (Exception e) {
bundle.putInt(Constants.SERVER_THREAD_STATUS, Constants.SERVER_THREAD_STATUS_INIT_FAILED);
msg.setData(bundle);
MainActivity.this.serverThreadMessageHandler.sendMessage(msg);
return;
}
Socket clientSocket;
while (true) {
try {
clientSocket = serverSocket.accept();
String hostAddress = clientSocket.getInetAddress().getHostAddress();
boolean inClients = false;
for (Client client : clients)
if (client.host.equals(hostAddress)) {
inClients = true;
break;
}
if (!inClients) {
Client newClient = new Client(hostAddress);
clients.add(newClient);
newClient.connect();
}
Server server = new Server(clientSocket, hostAddress);
servers.add(server);
server.start();
} catch (Exception e) {
}
}
}
@Test(timeout = 90000)
public void testRPCInterruptedSimple() throws IOException {
final Configuration conf = new Configuration();
Server server =
new RPC.Builder(conf)
.setProtocol(TestProtocol.class)
.setInstance(new TestImpl())
.setBindAddress(ADDRESS)
.setPort(0)
.setNumHandlers(5)
.setVerbose(true)
.setSecretManager(null)
.build();
server.start();
InetSocketAddress addr = NetUtils.getConnectAddress(server);
final TestProtocol proxy = RPC.getProxy(TestProtocol.class, TestProtocol.versionID, addr, conf);
// Connect to the server
proxy.ping();
// Interrupt self, try another call
Thread.currentThread().interrupt();
try {
proxy.ping();
fail("Interruption did not cause IPC to fail");
} catch (IOException ioe) {
if (!ioe.toString().contains("InterruptedException")) {
throw ioe;
}
// clear interrupt status for future tests
Thread.interrupted();
}
}
/** Update the server. */
private void updateServer() {
System.out.println("Updating the server.");
// PLACEHOLDER
server.SendData("HELO");
System.out.println(server.getData());
}
private void refreshTimeoutOnEvade(User user, Server server) {
ServerTimeout timeout =
SafeNav.of(serverStorage.get(server.getId()))
.next(TempServerConfig::getServerTimeouts)
.next(ServerTimeoutStorage::getTimeouts)
.next(timeouts -> timeouts.get(user.getId()))
.get();
if (timeout == null) {
LOGGER.warn(
"Attempted to refresh a timeout on a user who was not timed out! {} ({})",
user.getUsername(),
user.getId());
return;
}
LOGGER.info(
"User {} ({}) attempted to evade a timeout on {} ({})!",
user.getUsername(),
user.getId(),
server.getName(),
server.getId());
Channel channel = apiClient.getChannelById(server.getId(), server);
apiClient.sendMessage(
loc.localize(
"listener.mod.timeout.on_evasion",
user.getId(),
formatDuration(Duration.between(Instant.now(), timeout.getEndTime())),
formatInstant(timeout.getEndTime())),
channel);
applyTimeoutRole(user, server, channel);
}
// ainda nao acabou
public Server chooseServer() {
int maximun = -1;
Vector<Server> bestServers = new Vector<Server>();
// escolher os servidores com maior capacidade
for (int i = 0; i < p.getServers().size(); i++) {
if (p.getServers().get(i).getCapacity() >= maximun) {
if (p.getServers().get(i).getCapacity() > maximun) {
bestServers = new Vector<Server>();
maximun = p.getServers().get(i).getCapacity();
}
bestServers.add(p.getServers().get(i));
}
}
if (maximun == -1) {
return null;
}
// escolher os servidores com menor tamanho
Server bestServer = bestServers.get(0);
for (int i = 1; i < bestServers.size(); i++) {
if (bestServers.get(i).getSlots() < bestServer.getSlots()) {
bestServer = bestServers.get(i);
}
}
return null;
}
public void testSerial(
int handlerCount, boolean handlerSleep, int clientCount, int callerCount, int callCount)
throws Exception {
Server server = new TestServer(handlerCount, handlerSleep);
InetSocketAddress addr = NetUtils.getConnectAddress(server);
server.start();
Client[] clients = new Client[clientCount];
for (int i = 0; i < clientCount; i++) {
clients[i] = new Client(LongWritable.class, conf);
}
SerialCaller[] callers = new SerialCaller[callerCount];
for (int i = 0; i < callerCount; i++) {
callers[i] = new SerialCaller(clients[i % clientCount], addr, callCount);
callers[i].start();
}
for (int i = 0; i < callerCount; i++) {
callers[i].join();
assertFalse(callers[i].failed);
}
for (int i = 0; i < clientCount; i++) {
clients[i].stop();
}
server.stop();
}
/**
* Method declaration
*
* @return
*/
private Session init() {
try {
mSocket.setTcpNoDelay(true);
mInput = new DataInputStream(new BufferedInputStream(mSocket.getInputStream()));
mOutput = new DataOutputStream(new BufferedOutputStream(mSocket.getOutputStream()));
user = mInput.readUTF();
String password = mInput.readUTF();
Session c;
try {
mServer.trace(mThread + ":trying to connect user " + user);
return mServer.mDatabase.connect(user, password);
} catch (SQLException e) {
write(new Result(e.getMessage(), e.getErrorCode()).getBytes());
}
} catch (Exception e) {
mServer.trace(mThread + ":couldn't connect " + user);
}
close();
return null;
}
public void run() {
try {
Telnet.writeLine(cs, "<fggreen> >>> Welcome to AdaMUD <<< <reset>");
Telnet.flushInput(cs);
while ((player = s.getPlayerDB().login(cs, s)) == null) ;
player.look();
while (true) {
System.out.println("Waiting for message");
String message = Telnet.readLine(cs).trim();
if (message == null) {
// Disconnected
break;
}
if (message.equals("bye")) {
Telnet.writeLine(cs, "Goodbye!");
break;
}
parseCommand(message);
}
cs.close();
} catch (IOException e) {
System.out.println("Client error: " + e);
} finally {
s.getPlayerDB().remove(player);
s.remove(cs);
}
}
public void run() {
ServerSocket mainSocket = null;
try {
mainSocket = new ServerSocket(wyldConfig.getPort());
} catch (IOException e) {
Misc.println(Messages.PORT_IN_USE.getDesc());
}
Misc.println(
"[Socket] Listening on port " + wyldConfig.getPort() + " for incoming connections.");
while (true) {
Socket connectionSocket = null;
try {
connectionSocket = mainSocket.accept();
} catch (IOException e) {
Misc.servere(e.toString());
}
try {
Server thread = new Server(connectionSocket, i, irc);
thread.start();
irc.clients.add(thread);
} catch (java.lang.NullPointerException e) {
e.printStackTrace();
}
i++;
}
}
public void Dispose() {
for (Server server : servers) {
server.Dispose();
}
super.Dispose();
}
private int getScore() {
List<Integer> guaranteedCapacity = new ArrayList<Integer>();
for (int i = 0; i < this.nbPools; i++) {
List<Integer> capacityPerRow = new ArrayList<Integer>();
for (int j = 0; j < this.nbRows; j++) {
capacityPerRow.add(0);
}
for (Server s : this.servers) {
if (s.getPool() == i) {
capacityPerRow.set(s.getRow(), capacityPerRow.get(s.getRow()) + s.getCapacity());
}
}
int max = 0, sum = 0;
for (Integer n : capacityPerRow) {
max = (max > n) ? max : n;
sum += n;
}
guaranteedCapacity.add(sum - max);
}
int min = Integer.MAX_VALUE;
for (Integer n : guaranteedCapacity) {
min = (min < n) ? min : n;
}
return min;
}
public boolean cast(Player player, String[] command) {
if (removeReagents(player, reagents)) {
// reagents removed - cast spell
// get targeted block
HitBlox hit = new HitBlox(player);
Block target = hit.getTargetBlock();
// remove blocks around target block
Server s = etc.getServer();
for (int x = target.getX() - BLAST_RADIUS; x <= target.getX() + BLAST_RADIUS; x++) {
for (int y = target.getY() - BLAST_RADIUS; y <= target.getY() + BLAST_RADIUS; y++) {
for (int z = target.getZ() - BLAST_RADIUS; z <= target.getZ() + BLAST_RADIUS; z++) {
s.setBlockAt(0, x, y, z);
}
}
}
// send alerts
player.sendMessage(TEXT_COLOR + STR_CAST);
sendMessageToPlayersInRange(player, STR_CAST_OTHERS);
return true;
} else {
// reagents missing
player.sendMessage(TEXT_COLOR + STR_NO_REAGENTS);
return false;
}
}
public static void main(String[] args) {
Server c = new Server();
int status = c.main("Server", args);
System.gc();
System.exit(status);
}
@Test
public void memoryTest() throws InterruptedException {
final StatefulKnowledgeSession ksession = createKnowledgeSession();
Event myevent = new Event();
ksession.setGlobal("event", myevent);
final Server node1 = new Server(1500, "server1");
new Thread(
new Runnable() {
public void run() {
ksession.fireUntilHalt();
}
})
.start();
serverHandle = ksession.insert(node1);
int memory = 1500;
for (int i = 0; i < 5; i++) {
Thread.sleep(6000);
memory = memory - 200;
node1.setMemory(memory);
ksession.update(serverHandle, node1);
}
ksession.halt();
System.out.println(myevent.getEvents());
}
private void stopTimeout(MessageContext context, String args) {
if (args.isEmpty()) {
apiClient.sendMessage(
loc.localize("commands.mod.stoptimeout.response.invalid"), context.getChannel());
return;
}
String uid = args;
if (uid.length() > 4) {
if (uid.startsWith("<@")) {
uid = uid.substring(2, uid.length() - 1);
}
Server server = context.getServer();
User user = apiClient.getUserById(uid, server);
if (user == NO_USER) {
user = new User("UNKNOWN", uid, "", null);
}
LOGGER.info(
"{} ({}) is attempting to cancel timeout for {} ({}) in {} ({})",
context.getAuthor().getUsername(),
context.getAuthor().getId(),
user.getUsername(),
user.getId(),
server.getName(),
server.getId());
cancelTimeout(user, server, context.getChannel());
} else {
apiClient.sendMessage(
loc.localize("commands.mod.stoptimeout.response.invalid"), context.getChannel());
}
}
@Test
public void testProxyAddress() throws IOException {
Server server =
new RPC.Builder(conf)
.setProtocol(TestProtocol.class)
.setInstance(new TestImpl())
.setBindAddress(ADDRESS)
.setPort(0)
.build();
TestProtocol proxy = null;
try {
server.start();
InetSocketAddress addr = NetUtils.getConnectAddress(server);
// create a client
proxy = RPC.getProxy(TestProtocol.class, TestProtocol.versionID, addr, conf);
assertEquals(addr, RPC.getServerAddress(proxy));
} finally {
server.stop();
if (proxy != null) {
RPC.stopProxy(proxy);
}
}
}
@Test(timeout = 90000)
public void testRPCInterruptedSimple() throws Exception {
final Configuration conf = new Configuration();
Server server =
RPC.getServer(TestProtocol.class, new TestImpl(), ADDRESS, 0, 5, true, conf, null);
server.start();
InetSocketAddress addr = NetUtils.getConnectAddress(server);
final TestProtocol proxy = RPC.getProxy(TestProtocol.class, TestProtocol.versionID, addr, conf);
// Connect to the server
proxy.ping();
// Interrupt self, try another call
Thread.currentThread().interrupt();
try {
proxy.ping();
fail("Interruption did not cause IPC to fail");
} catch (IOException ioe) {
if (!ioe.toString().contains("InterruptedException")) {
throw ioe;
}
// clear interrupt status for future tests
Thread.interrupted();
} finally {
server.stop();
}
}
@Override
@Transactional
public void addNewAlias(Application application, String alias)
throws ServiceException, CheckException {
logger.info("ALIAS VALUE IN addNewAlias : " + alias);
if (checkAliasIfExists(alias)) {
throw new CheckException(
"This alias is already used by another application on this CloudUnit instance");
}
alias = alias.toLowerCase();
if (alias.startsWith("https://") || alias.startsWith("http://") || alias.startsWith("ftp://")) {
alias = alias.substring(alias.lastIndexOf("//") + 2, alias.length());
}
if (!StringUtils.isAlphanumeric(alias)) {
throw new CheckException(
"This alias must be alphanumeric. Please remove all other characters");
}
try {
Server server = application.getServers().get(0);
application.getAliases().add(alias);
hipacheRedisUtils.writeNewAlias(alias, application, server.getServerAction().getServerPort());
applicationDAO.save(application);
} catch (DataAccessException e) {
throw new ServiceException(e.getLocalizedMessage(), e);
}
}
@Test
public void testConnectionPing() throws Exception {
Configuration conf = new Configuration();
int pingInterval = 50;
conf.setBoolean(CommonConfigurationKeys.IPC_CLIENT_PING_KEY, true);
conf.setInt(CommonConfigurationKeys.IPC_PING_INTERVAL_KEY, pingInterval);
final Server server =
new RPC.Builder(conf)
.setProtocol(TestProtocol.class)
.setInstance(new TestImpl())
.setBindAddress(ADDRESS)
.setPort(0)
.setNumHandlers(5)
.setVerbose(true)
.build();
server.start();
final TestProtocol proxy =
RPC.getProxy(TestProtocol.class, TestProtocol.versionID, server.getListenerAddress(), conf);
try {
// this call will throw exception if server couldn't decode the ping
proxy.sleep(pingInterval * 4);
} finally {
if (proxy != null) RPC.stopProxy(proxy);
}
}
public void startLobby() {
server.broadcastMessage(GOLD + "[ServerGames]" + GREEN + " Countdown started.");
clearAll();
bets.clear();
this.clearEnt();
load();
tpAll(waiting);
ServerGames.current = worlds.get(new Random().nextInt(ServerGames.worlds.size()));
for (Player p : server.getOnlinePlayers()) {
showAllFor(p);
showPlayer(p);
if (isTribute(p) || isSpectator(p)) clearItems(p);
}
loaded.clear();
this.resetPlayers();
state = State.LOBBY;
game = new Lobby(this);
startTimer();
}
/** Test that server.stop() properly stops all threads */
@Test
public void testStopsAllThreads() throws IOException, InterruptedException {
int threadsBefore = countThreads("Server$Listener$Reader");
assertEquals("Expect no Reader threads running before test", 0, threadsBefore);
final Server server =
new RPC.Builder(conf)
.setProtocol(TestProtocol.class)
.setInstance(new TestImpl())
.setBindAddress(ADDRESS)
.setPort(0)
.setNumHandlers(5)
.setVerbose(true)
.build();
server.start();
try {
// Wait for at least one reader thread to start
int threadsRunning = 0;
long totalSleepTime = 0;
do {
totalSleepTime += 10;
Thread.sleep(10);
threadsRunning = countThreads("Server$Listener$Reader");
} while (threadsRunning == 0 && totalSleepTime < 5000);
// Validate that at least one thread started (we didn't timeout)
threadsRunning = countThreads("Server$Listener$Reader");
assertTrue(threadsRunning > 0);
} finally {
server.stop();
}
int threadsAfter = countThreads("Server$Listener$Reader");
assertEquals("Expect no Reader threads left running after test", 0, threadsAfter);
}
/**
* Konstruktor, uebernimmt eine Socket-Verbindung vom Server, initialisiert die Ein-und
* Ausgabestreams des Sockets und speichert seine Spielernummer, die er vom Server zugewiesen
* bekommt. Diese wird dann zuletzt an den Communicator gesendet.
*
* @param connection Socketverbindung
* @param server Server-Objekt
* @param cnt Spielernummer
* @param gameID Spiel-ID
* @param name Spielname
* @exception IOException
* @exception SocketException
*/
public ServerThread(Socket connection, Server server, int cnt, int gameID, String name) {
this.connection = connection;
this.server = server;
this.myNumber = cnt;
this.gameID = gameID;
this.nameOfTheGame = name;
try {
out =
new PrintWriter(
new BufferedWriter(new OutputStreamWriter(this.connection.getOutputStream())));
in = new BufferedReader(new InputStreamReader(this.connection.getInputStream()));
} catch (IOException e) {
String log = "player " + (myNumber + 1) + ":error creating ServerThread\n";
System.out.print(log);
this.server.log(log, server.getPort());
}
send("1" + Integer.toString(myNumber)); // sende die zugewiesene
// Spielernummer
// an den Communicator
try {
this.connection.setSoTimeout(1800000);
this.connection.setSoLinger(true, 6); // optional?
} catch (SocketException e) {
String log = "player " + (myNumber + 1) + ": error setting socket options\n";
System.out.print(log);
this.server.log(log, server.getPort());
}
}
public void markServerDown(String id) {
boolean triggered = false;
id = Server.normalizeId(id);
if (id == null) {
return;
}
Lock writeLock = upServerLock.writeLock();
try {
writeLock.lock();
final List<Server> changedServers = new ArrayList<Server>();
for (Server svr : upServerList) {
if (svr.isAlive() && (svr.getId().equals(id))) {
triggered = true;
svr.setAlive(false);
changedServers.add(svr);
}
}
if (triggered) {
logger.error("LoadBalancer: markServerDown called on [" + id + "]");
notifyServerStatusChangeListener(changedServers);
}
} finally {
try {
writeLock.unlock();
} catch (Exception e) { // NOPMD
}
}
}
/* ------------------------------------------------------------ */
protected void doStart() throws Exception {
if (_server == null) throw new IllegalStateException("No server");
// open listener port
open();
super.doStart();
if (_threadPool == null) _threadPool = _server.getThreadPool();
if (_threadPool != _server.getThreadPool() && (_threadPool instanceof LifeCycle))
((LifeCycle) _threadPool).start();
// Start selector thread
synchronized (this) {
_acceptorThread = new Thread[getAcceptors()];
for (int i = 0; i < _acceptorThread.length; i++) {
if (!_threadPool.dispatch(new Acceptor(i))) {
Log.warn("insufficient maxThreads configured for {}", this);
break;
}
}
}
Log.info("Started {}", this);
}
@Test
public void testTwoEndPoints() throws Exception {
new Thread(
() -> {
final ArrayList<ServiceDefinition> endpoints = new ArrayList<>();
endpoints.add(DEF);
endpoints.add(DEF2);
final Server server = new Server(logger, handlerFactory());
server.init(PORT, endpoints, Executors.newSingleThreadExecutor());
})
.start();
final ClientFactory clientFactory = new MultiplexedClientFactory(PORT);
final TestService.AsyncIface client = clientFactory.create(DEF, HOSTNAME);
final TestResponse response = callTestService(client);
logger.info("Received: " + response);
assertEquals(response.getResult(), Handler.RESULT);
final TestService2.AsyncIface client2 = clientFactory.create(DEF2, HOSTNAME);
final TestResponse2 response2 = callTestService2(client2);
logger.info("Received: " + response2);
assertEquals(response2.getResult(), Handler2.RESULT);
clientFactory.close();
}
private void testSampler(final int count, float frequency) {
server.setMaxConnections(1);
final ArrayList<String> expected = new ArrayList<String>(count);
Timeout gen =
new Timeout() {
Tag tag = new SimpleTag(0);
int sent = 0;
@Override
public void onSample(DatawireEvent e) {
String body = template.render(sent);
expected.add(body);
Message message = Message.Factory.create();
message.setBody(new AmqpValue(body));
DatawireUtils.send(e.getLink(), tag, message);
sent += 1;
if (sent >= count) {
e.getLink().close();
cancel();
}
}
};
Sender snd =
Sender.Builder()
.withTarget(server.address())
.withHandlers(new Sampler(gen, frequency))
.create();
reactor.getHandler().add(snd);
gen.setTimeout(reactor, 2000);
snd.start(reactor);
reactor.run();
assertTrue("Sampling timed out", gen.isCancelled());
assertEquals("Expected messages", expected, sink.getMessages());
}