private void SetState(GlobalThreadState newState)
{
GlobalThreadState oldState;
lock (stateLock)
{
oldState = State;
if (oldState == GlobalThreadState.PENDING_SHUTDOWN && newState == GlobalThreadState.PENDING_SHUTDOWN)
{
// when the state is already in PENDING_SHUTDOWN, its transition to itself
// will be refused but we do not throw exception here
return;
}
else if (oldState == GlobalThreadState.DEAD)
{
// when the state is already in NOT_RUNNING, all its transitions
// will be refused but we do not throw exception here
return;
}
else if (!oldState.IsValidTransition(newState))
{
log.Error($"{logPrefix}Unexpected state transition from {oldState} to {newState}");
throw new StreamsException($"Unexpected state transition from {oldState} to {newState}");
}
else
{
log.Info($"{logPrefix}State transition from {oldState} to {newState}");
}
State = newState;
}
StateChanged?.Invoke(this, oldState, State);
}
public GlobalStreamThread(string threadClientId,
IConsumer <byte[], byte[]> globalConsumer,
IStreamConfig configuration,
IGlobalStateMaintainer globalStateMaintainer)
{
logPrefix = $"global-stream-thread {threadClientId} ";
this.globalConsumer = globalConsumer;
this.configuration = configuration;
this.globalStateMaintainer = globalStateMaintainer;
thread = new Thread(Run);
State = GlobalThreadState.CREATED;
}
internal void OnGlobalThreadStateChange(GlobalStreamThread thread, IThreadStateTransitionValidator old, IThreadStateTransitionValidator @new)
{
lock (threadStatesLock)
{
if (thread != null)
{
GlobalThreadState newState = (GlobalThreadState)@new;
globalThreadState = newState;
if (newState == GlobalThreadState.RUNNING)
{
MaybeSetRunning();
}
else if (newState == GlobalThreadState.DEAD && stream.SetState(KafkaStream.State.ERROR))
{
log.Error("Global thread has died. The instance will be in error state and should be closed.");
}
}
}
}
public StreamStateManager(KafkaStream stream, Dictionary <long, ThreadState> threadState, GlobalThreadState globalThreadState)
{
this.globalThreadState = globalThreadState;
this.threadState = threadState;
this.stream = stream;
}
