@Override
public boolean postStateTransitionEvent(
State oldState,
Event event,
State newState,
VirtualMachine vm,
boolean status,
Object opaque) {
if (!status) {
return false;
}
@SuppressWarnings("unchecked")
Pair<Long, Long> hosts = (Pair<Long, Long>) opaque;
Long oldHostId = hosts.first();
s_logger.debug(
"VM state transitted from :"
+ oldState
+ " to "
+ newState
+ " with event: "
+ event
+ "vm's original host id: "
+ vm.getLastHostId()
+ " new host id: "
+ vm.getHostId()
+ " host id before state transition: "
+ oldHostId);
if (oldState == State.Starting) {
if (newState != State.Running) {
releaseVmCapacity(vm, false, false, oldHostId);
}
} else if (oldState == State.Running) {
if (event == Event.AgentReportStopped) {
releaseVmCapacity(vm, false, true, oldHostId);
} else if (event == Event.AgentReportMigrated) {
releaseVmCapacity(vm, false, false, oldHostId);
}
} else if (oldState == State.Migrating) {
if (event == Event.AgentReportStopped) {
/* Release capacity from original host */
releaseVmCapacity(vm, false, false, vm.getLastHostId());
releaseVmCapacity(vm, false, false, oldHostId);
} else if (event == Event.OperationFailed) {
/* Release from dest host */
releaseVmCapacity(vm, false, false, oldHostId);
} else if (event == Event.OperationSucceeded) {
releaseVmCapacity(vm, false, false, vm.getLastHostId());
}
} else if (oldState == State.Stopping) {
if (event == Event.OperationSucceeded) {
releaseVmCapacity(vm, false, true, oldHostId);
} else if (event == Event.AgentReportStopped) {
releaseVmCapacity(vm, false, false, oldHostId);
} else if (event == Event.AgentReportMigrated) {
releaseVmCapacity(vm, false, false, oldHostId);
}
} else if (oldState == State.Stopped) {
if (event == Event.DestroyRequested || event == Event.ExpungeOperation) {
releaseVmCapacity(vm, true, false, vm.getLastHostId());
} else if (event == Event.AgentReportMigrated) {
releaseVmCapacity(vm, false, false, oldHostId);
}
}
if ((newState == State.Starting
|| newState == State.Migrating
|| event == Event.AgentReportMigrated)
&& vm.getHostId() != null) {
boolean fromLastHost = false;
if (vm.getLastHostId() == vm.getHostId()) {
s_logger.debug("VM starting again on the last host it was stopped on");
fromLastHost = true;
}
allocateVmCapacity(vm, fromLastHost);
}
return true;
}
