private boolean doProcess(GroupInstanceTerminatingEvent event, Applications applications) {
// Validate event against the existing applications
Application application = applications.getApplication(event.getAppId());
if (application == null) {
if (log.isWarnEnabled()) {
log.warn(String.format("Application does not exist: [service] %s", event.getAppId()));
}
return false;
}
Group group = application.getGroupRecursively(event.getGroupId());
if (group == null) {
if (log.isWarnEnabled()) {
log.warn(
String.format(
"Group not exists in service: [AppId] %s [groupId] %s",
event.getAppId(), event.getGroupId()));
return false;
}
} else {
// Apply changes to the applications
GroupInstance context = group.getInstanceContexts(event.getInstanceId());
if (context == null) {
if (log.isWarnEnabled()) {
log.warn(
String.format(
"Group Instance not exists in Group: [AppId] %s [groupId] %s "
+ "[instanceId] %s",
event.getAppId(), event.getGroupId(), event.getInstanceId()));
return false;
}
}
// Apply changes to the topology
GroupStatus status = GroupStatus.Terminating;
if (!context.isStateTransitionValid(status)) {
log.error("Invalid State Transition from " + context.getStatus() + " to " + status);
return false;
}
context.setStatus(status);
}
// Notify event listeners
notifyEventListeners(event);
return true;
}
