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package akkamon.api;
import akka.actor.typed.ActorRef;
import akka.actor.typed.ActorSystem;
import akkamon.api.models.*;
import akkamon.domain.AkkamonMessageEngine;
import akkamon.domain.AkkamonNexus;
import akkamon.domain.AkkamonSession;
import akkamon.domain.InteractionHandshaker;
import com.google.gson.Gson;
import java.util.*;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
public class MessagingEngine implements AkkamonMessageEngine {
private Map<String, Set<AkkamonSession>> sceneIdToAkkamonSessions = new HashMap<>();
private Map<String, AkkamonSession> trainerIdToAkkamonSessions = new HashMap<>();
private Map<String, ActorRef<InteractionHandshaker.Command>> pendingInteractioRequestToHandshaker = new HashMap<>();
private Gson gson = new Gson();
private ActorRef<AkkamonNexus.Command> system;
public MessagingEngine() {
this.system = ActorSystem.create(AkkamonNexus.create(this), "akkamon-system");
ScheduledThreadPoolExecutor executor = new ScheduledThreadPoolExecutor(2);
executor.scheduleAtFixedRate(new Runnable() {
@Override
public void run() {
heartBeat();
}
}, 0, 200, TimeUnit.MILLISECONDS);
}
private void heartBeat() {
system.tell(new AkkamonNexus.RequestHeartBeat(
UUID.randomUUID().getMostSignificantBits() & Long.MAX_VALUE,
system
));
}
@Override
public void broadCastHeartBeatToScene(String sceneId,
Map<String, AkkamonNexus.MovementQueueReading> trainerPositions) {
Set<AkkamonSession> sceneSessions = sceneIdToAkkamonSessions.get(sceneId);
// System.out.println(sceneSessions);
// System.out.println(sceneIdToAkkamonSessions.keySet());
if (sceneSessions != null) {
for (AkkamonSession session : sceneSessions) {
Map<String, AkkamonNexus.MovementQueueReading> withoutSelf = new HashMap<>(trainerPositions);
withoutSelf.remove(session.getTrainerId());
HeartBeatEvent heartBeat = new HeartBeatEvent(
withoutSelf
);
String heartBeatMessage = gson.toJson(heartBeat);
// System.out.println("Sending to " + session.getTrainerId());
// System.out.println(heartBeatMessage);
session.send(
heartBeatMessage
);
}
}
}
@Override
public void broadCastInteractionRequestToSessionWithTrainerIds(List<String> trainerIds, String type, String trainerId, String requestName, ActorRef<InteractionHandshaker.Command> handshaker) {
System.out.println("Sending interaction request " + requestName);
this.pendingInteractioRequestToHandshaker.put(requestName, handshaker);
trainerIds.add(trainerId);
for (String id : trainerIds) {
AkkamonSession session = trainerIdToAkkamonSessions.get(id);
if (session != null) {
session.send(gson.toJson(new InteractionRequest(
type,
id,
requestName
)));
}
}
}
@Override
public void registerTrainerSessionToSceneAndTrainerIdMaps(String sceneId, AkkamonSession session) {
System.out.println("Registering session to scene " + sceneId);
Set<AkkamonSession> sceneIdMapping = sceneIdToAkkamonSessions.get(sceneId);
AkkamonSession trainerIdMapping = trainerIdToAkkamonSessions.get(session.getTrainerId());
if (sceneIdMapping != null) {
sceneIdMapping.add(session);
} else {
sceneIdMapping = new HashSet<>();
sceneIdMapping.add(session);
sceneIdToAkkamonSessions.put(sceneId,
sceneIdMapping
);
System.out.println(sceneIdToAkkamonSessions.keySet());
}
trainerIdToAkkamonSessions.put(session.getTrainerId(), session);
System.out.println(trainerIdToAkkamonSessions);
System.out.println("Sending trainerId: " + session.getTrainerId());
// TODO what if registration goes wrong ...
session.send(
gson.toJson(new TrainerRegistrationReplyEvent(session.getTrainerId()))
);
}
@Override
public void removeTrainerSessionFromScene(String sceneId, AkkamonSession session) {
this.sceneIdToAkkamonSessions.get(sceneId).remove(session);
}
@Override
public void trainerDisconnected(AkkamonSession session) {
String sceneId = null;
for (Map.Entry<String, Set<AkkamonSession>> entry : this.sceneIdToAkkamonSessions.entrySet()) {
if (entry.getValue().contains(session)) sceneId = entry.getKey();
}
system.tell(new AkkamonNexus.RequestTrainerOffline(
UUID.randomUUID().getMostSignificantBits() & Long.MAX_VALUE,
session.getTrainerId(),
sceneId,
session,
system
));
}
@Override
public void removeInteractionHandshaker(String requestName) {
this.pendingInteractioRequestToHandshaker.remove(requestName);
}
@Override
public void broadCastInteractionStart(String requestName, String interactionType, Set<String> waitingToStartInteraction) {
for (String trainerId : waitingToStartInteraction) {
AkkamonSession session = trainerIdToAkkamonSessions.get(trainerId);
session.send(gson.toJson(
new InteractionStartEvent(
requestName,
interactionType
)
));
}
}
@Override
public void broadCastHandshakeFail(String requestName, Set<String> waitingToStartInteraction) {
System.out.println("Handshake fail not implemented yet!");
}
void incoming(AkkamonSession session, String message) {
Event event = gson.fromJson(message, Event.class);
if (event == null) {
System.out.println("Received non-supported message DTO.");
return;
}
// TODO use session trainerId
String sceneId = "DemoScene";
switch (event.type) {
case INTERACTION_REPLY:
System.out.println("received interaction reply!");
sendToHandshaker(event.requestName, event.trainerId, event.sceneId, event.value);
break;
case INTERACTION_REQUEST:
System.out.println("received interaction request");
System.out.println(event.interaction);
system.tell(new AkkamonNexus.RequestInteraction(
UUID.randomUUID().getMostSignificantBits() & Long.MAX_VALUE,
event.interaction.type,
event.sceneId,
event.interaction.requestingTrainerId,
event.interaction.receivingTrainerIds,
system
));
break;
case START_MOVING:
system.tell(new AkkamonNexus.RequestStartMoving(
UUID.randomUUID().getMostSignificantBits() & Long.MAX_VALUE,
session.getTrainerId(),
event.sceneId,
event.direction,
system
));
break;
case NEW_TILE_POS:
system.tell(
new AkkamonNexus.RequestNewTilePos(
UUID.randomUUID().getMostSignificantBits() & Long.MAX_VALUE,
session.getTrainerId(),
event.sceneId,
event.tilePos,
system
)
);
break;
case STOP_MOVING:
system.tell(
new AkkamonNexus.RequestStopMoving(
UUID.randomUUID().getMostSignificantBits() & Long.MAX_VALUE,
session.getTrainerId(),
event.sceneId,
event.direction,
system
)
);
break;
case TRAINER_REGISTRATION_REQUEST:
String trainerId = String.valueOf(sceneIdToAkkamonSessions.get(sceneId) == null ? 1 : sceneIdToAkkamonSessions.get(sceneId).size() + 1);
system.tell(new AkkamonNexus.RequestTrainerRegistration(
trainerId,
sceneId,
session,
system
));
break;
case HEART_BEAT:
//System.out.println("My <3 beats!");
break;
}
}
private void sendToHandshaker(String requestName, String trainerId, String sceneId, boolean value) {
ActorRef<InteractionHandshaker.Command> handshaker = pendingInteractioRequestToHandshaker.get(requestName);
if (handshaker != null) {
handshaker.tell(
new InteractionHandshaker.InteractionReply(requestName, trainerId, sceneId, value)
);
}
}
private void updatePositions() {
}
}
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