@Override
public void masterIsAvailable(HighAvailabilityMemberChangeEvent event) {
if (event.getNewState() == event.getOldState()
&& event.getOldState() == HighAvailabilityMemberState.SLAVE) {
clusterMemberAvailability.memberIsAvailable(SLAVE, slaveHaURI, resolveStoreId());
} else {
stateChanged(event);
}
}
@Override
public void masterIsElected(HighAvailabilityMemberChangeEvent event) {
if (event.getNewState() == event.getOldState()
&& event.getOldState() == HighAvailabilityMemberState.MASTER) {
clusterMemberAvailability.memberIsAvailable(MASTER, masterHaURI, resolveStoreId());
} else {
stateChanged(event);
}
}
private void stateChanged(HighAvailabilityMemberChangeEvent event) {
if (event.getNewState() == event.getOldState()) {
/*
* We get here if for example a new master becomes available while we are already switching. In that case
* we don't change state but we must update with the new availableMasterId, but only if it is not null.
*/
if (event.getServerHaUri() != null) {
availableMasterId = event.getServerHaUri();
}
return;
}
availableMasterId = event.getServerHaUri();
currentTargetState = event.getNewState();
switch (event.getNewState()) {
case TO_MASTER:
if (event.getOldState().equals(HighAvailabilityMemberState.SLAVE)) {
clusterMemberAvailability.memberIsUnavailable(SLAVE);
}
switchToMaster();
break;
case TO_SLAVE:
switchToSlave();
break;
case PENDING:
if (event.getOldState().equals(HighAvailabilityMemberState.SLAVE)) {
clusterMemberAvailability.memberIsUnavailable(SLAVE);
} else if (event.getOldState().equals(HighAvailabilityMemberState.MASTER)) {
clusterMemberAvailability.memberIsUnavailable(MASTER);
}
switchToPending();
break;
default:
// do nothing
}
}
