void applyApplicationStateLocally(
InetAddress addr, EndpointState localStatePtr, EndpointState remoteStatePtr) {
Map<ApplicationState, VersionedValue> localAppStateMap = localStatePtr.getApplicationStateMap();
for (Entry<ApplicationState, VersionedValue> remoteEntry :
remoteStatePtr.getApplicationStateMap().entrySet()) {
ApplicationState remoteKey = remoteEntry.getKey();
VersionedValue remoteValue = remoteEntry.getValue();
VersionedValue localValue = localAppStateMap.get(remoteKey);
/* If state doesn't exist locally for this key then just apply it */
if (localValue == null) {
localStatePtr.addApplicationState(remoteKey, remoteValue);
doNotifications(addr, remoteKey, remoteValue);
continue;
}
int remoteGeneration = remoteStatePtr.getHeartBeatState().getGeneration();
int localGeneration = localStatePtr.getHeartBeatState().getGeneration();
assert remoteGeneration
>= localGeneration; // SystemTable makes sure we never generate a smaller generation on
// start
/* If the remoteGeneration is greater than localGeneration then apply state blindly */
if (remoteGeneration > localGeneration) {
localStatePtr.addApplicationState(remoteKey, remoteValue);
doNotifications(addr, remoteKey, remoteValue);
continue;
}
/* If the generations are the same then apply state if the remote version is greater than local version. */
if (remoteGeneration == localGeneration) {
int remoteVersion = remoteValue.version;
int localVersion = localValue.version;
if (remoteVersion > localVersion) {
localStatePtr.addApplicationState(remoteKey, remoteValue);
doNotifications(addr, remoteKey, remoteValue);
}
}
}
}
EndpointState getStateForVersionBiggerThan(InetAddress forEndpoint, int version) {
EndpointState epState = endpointStateMap_.get(forEndpoint);
EndpointState reqdEndpointState = null;
if (epState != null) {
/*
* Here we try to include the Heart Beat state only if it is
* greater than the version passed in. It might happen that
* the heart beat version maybe lesser than the version passed
* in and some application state has a version that is greater
* than the version passed in. In this case we also send the old
* heart beat and throw it away on the receiver if it is redundant.
*/
int localHbVersion = epState.getHeartBeatState().getHeartBeatVersion();
if (localHbVersion > version) {
reqdEndpointState = new EndpointState(epState.getHeartBeatState());
if (logger_.isTraceEnabled())
logger_.trace(
"local heartbeat version "
+ localHbVersion
+ " greater than "
+ version
+ " for "
+ forEndpoint);
}
/* Accumulate all application states whose versions are greater than "version" variable */
for (Entry<ApplicationState, VersionedValue> entry :
epState.getApplicationStateMap().entrySet()) {
VersionedValue value = entry.getValue();
if (value.version > version) {
if (reqdEndpointState == null) {
reqdEndpointState = new EndpointState(epState.getHeartBeatState());
}
final ApplicationState key = entry.getKey();
if (logger_.isTraceEnabled()) logger_.trace("Adding state " + key + ": " + value.value);
reqdEndpointState.addApplicationState(key, value);
}
}
}
return reqdEndpointState;
}
int getMaxEndpointStateVersion(EndpointState epState) {
int maxVersion = epState.getHeartBeatState().getHeartBeatVersion();
for (VersionedValue value : epState.getApplicationStateMap().values())
maxVersion = Math.max(maxVersion, value.version);
return maxVersion;
}