public void publish(String key, String value) {
logger.log(Level.INFO, "adding cache entry: " + key + " = " + value);
try {
if (cache == null) {
cache = gms.getGroupHandle().getDistributedStateCache();
}
cache.addToCache(GROUP_NAME, gms.getInstanceName(), key, value);
GroupHandle gh = gms.getGroupHandle();
gh.sendMessage(CACHE_CHANGE, CACHE_CHANGE.getBytes());
} catch (GMSException e) {
logger.log(Level.SEVERE, "Error updating cache" + e);
}
}
public void addObserver(Observer o) {
logger.log(Level.INFO, "Registering for group notifications");
gms.addActionFactory(new JoinNotificationActionFactoryImpl(this));
gms.addActionFactory(new JoinedAndReadyNotificationActionFactoryImpl(this));
gms.addActionFactory(new MessageActionFactoryImpl(this), CACHE_CHANGE);
gms.addActionFactory(new FailureNotificationActionFactoryImpl(this));
gms.addActionFactory(new FailureSuspectedActionFactoryImpl(this));
gms.addActionFactory(new PlannedShutdownActionFactoryImpl(this));
super.addObserver(o);
}
public void start(String serverName) {
logger.log(Level.INFO, "Initializing Shoal for with server name: " + serverName);
gms =
(GroupManagementService)
GMSFactory.startGMSModule(
serverName, GROUP_NAME, GroupManagementService.MemberType.CORE, null);
// TODO: shutdown hook is not working in linux , fix
// Runtime.getRuntime().addShutdownHook(new Thread() {
// @Override
// public void run() {
// System.out.println("system shutting down....");
// gms.shutdown(GMSConstants.shutdownType.INSTANCE_SHUTDOWN);
// }
// });
try {
gms.join();
} catch (GMSException e) {
logger.log(Level.SEVERE, "Error joining group" + e);
}
}
public List<String> getAgent() {
return gms.getGroupHandle().getAllCurrentMembers();
}
public Map getCache() {
if (cache == null) {
cache = gms.getGroupHandle().getDistributedStateCache();
}
return cache.getAllCache();
}