protected void initChannel() {
if (channel == null) {
buildChannel();
String transportNodeName = configuration.getTransportNodeName();
if (transportNodeName != null && transportNodeName.length() > 0) {
long range = Short.MAX_VALUE * 2;
long randomInRange = (long) ((Math.random() * range) % range) + 1;
transportNodeName = transportNodeName + "-" + randomInRange;
channel.setName(transportNodeName);
}
}
// Channel.LOCAL *must* be set to false so we don't see our own messages - otherwise
// invalidations targeted at remote instances will be received by self.
channel.setDiscardOwnMessages(true);
// if we have a TopologyAwareConsistentHash, we need to set our own address generator in
// JGroups
if (configuration.hasTopologyInfo()) {
// We can do this only if the channel hasn't been started already
if (startChannel) {
((JChannel) channel)
.setAddressGenerator(
new AddressGenerator() {
@Override
public org.jgroups.Address generateAddress() {
return TopologyUUID.randomUUID(
channel.getName(),
configuration.getSiteId(),
configuration.getRackId(),
configuration.getMachineId());
}
});
} else {
if (channel.getAddress() instanceof TopologyUUID) {
TopologyUUID topologyAddress = (TopologyUUID) channel.getAddress();
if (!configuration.getSiteId().equals(topologyAddress.getSiteId())
|| !configuration.getRackId().equals(topologyAddress.getRackId())
|| !configuration.getMachineId().equals(topologyAddress.getMachineId())) {
throw new CacheException(
"Topology information does not match the one set by the provided JGroups channel");
}
} else {
throw new CacheException("JGroups address does not contain topology coordinates");
}
}
}
}
@Override
public Channel createChannel(String id) throws Exception {
JChannel channel = new MuxChannel(this);
// We need to synchronize on shared transport,
// so we don't attempt to init a shared transport multiple times
TP transport = channel.getProtocolStack().getTransport();
if (transport.isSingleton()) {
synchronized (transport) {
this.init(transport);
}
} else {
this.init(transport);
}
channel.setName(configuration.getEnvironment().getNodeName() + "/" + id);
TransportConfiguration transportConfiguration = this.configuration.getTransport();
if (transportConfiguration.hasTopology()) {
channel.setAddressGenerator(
new TopologyAddressGenerator(
channel,
transportConfiguration.getSiteId(),
transportConfiguration.getRackId(),
transportConfiguration.getMachineId()));
}
MBeanServer server = this.configuration.getMBeanServer();
if (server != null) {
try {
this.channels.put(channel, id);
JmxConfigurator.registerChannel(channel, server, id);
} catch (Exception e) {
ROOT_LOGGER.warn(e.getMessage(), e);
}
channel.addChannelListener(this);
}
return channel;
}
