@Test
public void testJoinMessageReceivedForDisconnectedHost() throws Exception {
final AtomicInteger counter1 = new AtomicInteger(0);
final AtomicInteger counter2 = new AtomicInteger(0);
connector1.subscribe(String.class.getName(), new CountingCommandHandler(counter1));
connector1.connect(20);
assertTrue(
"Expected connector 1 to connect within 10 seconds",
connector1.awaitJoined(10, TimeUnit.SECONDS));
connector2.subscribe(String.class.getName(), new CountingCommandHandler(counter2));
connector2.connect(80);
assertTrue("Connector 2 failed to connect", connector2.awaitJoined());
// wait for both connectors to have the same view
waitForConnectorSync();
ConsistentHash hashBefore = connector1.getConsistentHash();
// secretly insert an illegal message
channel1
.getReceiver()
.receive(
new Message(
channel1.getAddress(),
new IpAddress(12345),
new JoinMessage(10, Collections.<String>emptySet())));
ConsistentHash hash2After = connector1.getConsistentHash();
assertEquals("That message should not have changed the ring", hashBefore, hash2After);
}
@SuppressWarnings("unchecked")
@Test(timeout = 30000)
public void testConnectAndDispatchMessages_Balanced() throws Exception {
assertNull(connector1.getNodeName());
assertNull(connector2.getNodeName());
final AtomicInteger counter1 = new AtomicInteger(0);
final AtomicInteger counter2 = new AtomicInteger(0);
connector1.subscribe(String.class.getName(), new CountingCommandHandler(counter1));
connector1.connect(20);
assertTrue(
"Expected connector 1 to connect within 10 seconds",
connector1.awaitJoined(10, TimeUnit.SECONDS));
connector2.subscribe(String.class.getName(), new CountingCommandHandler(counter2));
connector2.connect(80);
assertTrue("Connector 2 failed to connect", connector2.awaitJoined());
// wait for both connectors to have the same view
waitForConnectorSync();
List<FutureCallback> callbacks = new ArrayList<>();
for (int t = 0; t < 100; t++) {
FutureCallback<Object, Object> callback = new FutureCallback<>();
String message = "message" + t;
if ((t & 1) == 0) {
connector1.send(message, new GenericCommandMessage<>(message), callback);
} else {
connector2.send(message, new GenericCommandMessage<>(message), callback);
}
callbacks.add(callback);
}
for (FutureCallback callback : callbacks) {
assertEquals("The Reply!", callback.get());
}
assertEquals(100, counter1.get() + counter2.get());
System.out.println("Node 1 got " + counter1.get());
System.out.println("Node 2 got " + counter2.get());
verify(mockCommandBus1, atMost(40))
.dispatch(any(CommandMessage.class), isA(CommandCallback.class));
verify(mockCommandBus2, atLeast(60))
.dispatch(any(CommandMessage.class), isA(CommandCallback.class));
assertEquals(connector1.getMembers(), connector2.getMembers());
assertNotNull(connector1.getNodeName());
assertNotNull(connector2.getNodeName());
assertNotEquals(connector1.getNodeName(), connector2.getNodeName());
}
@Test
public void testConnectorRecoversWhenGossipRouterReconnects() throws Exception {
final AtomicInteger counter1 = new AtomicInteger(0);
final AtomicInteger counter2 = new AtomicInteger(0);
connector1.subscribe(String.class.getName(), new CountingCommandHandler<String>(counter1));
connector1.connect(20);
assertTrue(
"Expected connector 1 to connect within 10 seconds",
connector1.awaitJoined(10, TimeUnit.SECONDS));
connector2.subscribe(Long.class.getName(), new CountingCommandHandler<Long>(counter2));
connector2.connect(80);
assertTrue("Connector 2 failed to connect", connector2.awaitJoined());
// the nodes joined, but didn't detect eachother
gossipRouter.start();
// now, they should detect eachother and start syncing their state
waitForConnectorSync(60);
}
@Test(timeout = 300000)
public void testHashChangeNotification() throws Exception {
connector1.connect(10);
connector2.connect(10);
// wait for both connectors to have the same view
waitForConnectorSync();
// connector 1 joined
ConsistentHash notify1 = hashChangeListener.notifications.poll(5, TimeUnit.SECONDS);
// connector 2 joined
ConsistentHash notify2 = hashChangeListener.notifications.poll(5, TimeUnit.SECONDS);
// Self and other node have joined
assertEquals(connector1.getConsistentHash(), notify2);
channel2.close();
// Other node has left
ConsistentHash notify3 = hashChangeListener.notifications.poll(5, TimeUnit.SECONDS);
assertEquals(connector1.getConsistentHash(), notify3);
}
@Test(timeout = 30000)
public void testRingsProperlySynchronized_ChannelAlreadyConnected() throws Exception {
final AtomicInteger counter1 = new AtomicInteger(0);
final AtomicInteger counter2 = new AtomicInteger(0);
connector1.subscribe(String.class.getName(), new CountingCommandHandler(counter1));
channel1.connect(clusterName);
connector1.connect(20);
assertTrue(
"Expected connector 1 to connect within 10 seconds",
connector1.awaitJoined(10, TimeUnit.SECONDS));
connector2.subscribe(Long.class.getName(), new CountingCommandHandler(counter2));
channel2.connect(clusterName);
connector2.connect(80);
assertTrue("Connector 2 failed to connect", connector2.awaitJoined());
waitForConnectorSync();
FutureCallback<Object, Object> callback1 = new FutureCallback<>();
connector1.send("1", new GenericCommandMessage<>("Hello"), callback1);
FutureCallback<Object, Object> callback2 = new FutureCallback<>();
connector1.send("1", new GenericCommandMessage<>(1L), callback2);
FutureCallback<Object, Object> callback3 = new FutureCallback<>();
connector2.send("1", new GenericCommandMessage<>("Hello"), callback3);
FutureCallback<Object, Object> callback4 = new FutureCallback<>();
connector2.send("1", new GenericCommandMessage<>(1L), callback4);
assertEquals("The Reply!", callback1.get());
assertEquals("The Reply!", callback2.get());
assertEquals("The Reply!", callback3.get());
assertEquals("The Reply!", callback4.get());
assertTrue(connector1.getConsistentHash().equals(connector2.getConsistentHash()));
}
@Test
public void testSetupOfReplyingCallback() throws InterruptedException {
final String mockPayload = "DummyString";
final CommandMessage<String> commandMessage = new GenericCommandMessage<>(mockPayload);
final DispatchMessage dispatchMessage = new DispatchMessage(commandMessage, serializer, true);
final Message message = new Message(channel1.getAddress(), dispatchMessage);
connector1.connect(20);
assertTrue(
"Expected connector 1 to connect within 10 seconds",
connector1.awaitJoined(10, TimeUnit.SECONDS));
channel1.getReceiver().receive(message);
// Verify that the newly introduced ReplyingCallBack class is being wired in. Actual behaviour
// of ReplyingCallback is tested in its unit tests
verify(mockCommandBus1).dispatch(any(), any(ReplyingCallback.class));
}
@Test(expected = ConnectionFailedException.class, timeout = 30000)
public void testRingsProperlySynchronized_ChannelAlreadyConnectedToOtherCluster()
throws Exception {
channel1.connect("other");
connector1.connect(20);
}