private void writeTransport(
XMLExtendedStreamWriter writer, GlobalConfiguration globalConfiguration)
throws XMLStreamException {
TransportConfiguration transport = globalConfiguration.transport();
AttributeSet attributes = transport.attributes();
if (attributes.isModified()) {
writer.writeStartElement(Element.TRANSPORT);
attributes.write(writer, TransportConfiguration.CLUSTER_NAME, Attribute.CLUSTER);
attributes.write(writer, TransportConfiguration.MACHINE_ID, Attribute.MACHINE_ID);
attributes.write(writer, TransportConfiguration.RACK_ID, Attribute.RACK_ID);
if (transport.siteId() != null) {
attributes.write(writer, TransportConfiguration.SITE_ID, Attribute.SITE);
} else if (globalConfiguration.sites().localSite() != null) {
writer.writeAttribute(Attribute.SITE, globalConfiguration.sites().localSite());
}
attributes.write(writer, TransportConfiguration.NODE_NAME, Attribute.NODE_NAME);
TypedProperties properties = globalConfiguration.transport().properties();
if (properties.containsKey("stack")) {
writer.writeAttribute(Attribute.STACK, properties.getProperty("stack"));
}
if (transport.remoteCommandThreadPool().threadPoolFactory() != null) {
writer.writeAttribute(Attribute.REMOTE_COMMAND_EXECUTOR, "remote-command-pool");
}
if (transport.transportThreadPool().threadPoolFactory() != null) {
writer.writeAttribute(Attribute.EXECUTOR, "transport-pool");
}
writer.writeEndElement();
}
}
protected void initChannel() {
final TransportConfiguration transportCfg = configuration.transport();
if (channel == null) {
buildChannel();
String transportNodeName = transportCfg.nodeName();
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 (transportCfg.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(),
transportCfg.siteId(),
transportCfg.rackId(),
transportCfg.machineId());
}
});
} else {
if (channel.getAddress() instanceof TopologyUUID) {
TopologyUUID topologyAddress = (TopologyUUID) channel.getAddress();
if (!transportCfg.siteId().equals(topologyAddress.getSiteId())
|| !transportCfg.rackId().equals(topologyAddress.getRackId())
|| !transportCfg.machineId().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");
}
}
}
}