/**
* Connects this member to the cluster using the given <code>loadFactor</code>. The <code>
* loadFactor</code> defines the (approximate) relative load that this member will receive.
*
* <p>A good default value is 100, which will give this member 100 nodes on the distributed hash
* ring. Giving all members (proportionally) lower values will result in a less evenly distributed
* hash.
*
* @param loadFactor The load factor for this node.
* @throws ConnectionFailedException when an error occurs while connecting
*/
public synchronized void connect(int loadFactor) throws ConnectionFailedException {
this.currentLoadFactor = loadFactor;
Assert.isTrue(loadFactor >= 0, "Load Factor must be a positive integer value.");
Assert.isTrue(
channel.getReceiver() == null || channel.getReceiver() == messageReceiver,
"The given channel already has a receiver configured. "
+ "Has the channel been reused with other Connectors?");
try {
channel.setReceiver(messageReceiver);
if (channel.isConnected() && !clusterName.equals(channel.getClusterName())) {
throw new AxonConfigurationException(
"The Channel that has been configured with this JGroupsConnector "
+ "is already connected to another cluster.");
} else if (channel.isConnected()) {
// we need to fetch state now that we have attached our MessageReceiver
channel.getState(null, 10000);
} else {
// we need to connect. This will automatically fetch state as well.
channel.connect(clusterName, null, 10000);
}
updateMembership();
} catch (Exception e) {
joinedCondition.markJoined(false);
channel.disconnect();
throw new ConnectionFailedException("Failed to connect to JGroupsConnectorFactoryBean", e);
}
}
@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);
}
private static void injectView(View view, JChannel... channels) {
for (JChannel ch : channels) {
ch.down(new Event(Event.VIEW_CHANGE, view));
ch.up(new Event(Event.VIEW_CHANGE, view));
}
for (JChannel ch : channels) {
MyReceiver receiver = (MyReceiver) ch.getReceiver();
System.out.println("[" + receiver.name + "] view=" + ch.getView());
}
}
@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));
}