/**
* Constructs an instance for the cluster service
*
* @param localServerId id of the server instance in which this ClusterStateService instance is
* running
* @param timeout timeout for waiting on an individual server (millisec)
* @param period checking cycle period (millisecs)
* @param members map if server id - > url for all cluster members
* @throws Exception
*/
protected ClusterStateService(
SessionService sessionService,
String localServerId,
int timeout,
long period,
Map<String, String> members)
throws Exception {
if ((localServerId == null) || (localServerId.isEmpty())) {
String message =
"ClusterStateService: Local Server Id argument is null, unable to instantiate Cluster State Service!";
sessionDebug.error(message);
throw new IllegalArgumentException(message);
}
// Ensure we Synchronize this Instantiation.
synchronized (this) {
this.sessionService = sessionService;
this.localServerId = localServerId;
this.timeout = timeout;
this.period = period;
serverSelectionList = new ServerInfo[members.size()];
for (Map.Entry<String, String> entry : members.entrySet()) {
ServerInfo info = new ServerInfo();
info.id = entry.getKey();
URL url = new URL(entry.getValue() + "/namingservice");
info.url = url;
info.protocol = url.getProtocol();
info.address = new InetSocketAddress(url.getHost(), url.getPort());
// Fix for Deadlock. If this is our server, set to true, else false.
info.isUp = isLocalServerId(info.id);
info.isLocal = info.isUp; // Set our Local Server Indicator, per above interrogation.
// Check for Down Servers.
if (!info.isUp) {
downServers.add(info.id);
}
// Add Server to Server List.
servers.put(info.id, info);
// Associate to a Server Selection Bucket.
serverSelectionList[getNextSelected()] = info;
if (sessionDebug.messageEnabled()) {
sessionDebug.error("Added Server to ClusterStateService: " + info.toString());
}
} // End of For Loop.
// to ensure that ordering in different server instances is identical
Arrays.sort(serverSelectionList);
SystemTimer.getTimer().schedule(this, new Date((System.currentTimeMillis() / 1000) * 1000));
} // End of Synchronized Block.
}
