public EngineRunner(IOptions <EngineRunnerOptions> options, IRepository <Student, string> studentRepository, IRepository <Survey, string> surveyRepository, ISnapshotGenerator snapshotGenerator,
IAssignmentGenerator assignmentGenerator, IMarkovModelGenerator markovModelGenerator)
{
StudentRepository = studentRepository;
SurveyRepository = surveyRepository;
SnapshotGenerator = snapshotGenerator;
AssignmentGenerator = assignmentGenerator;
MarkovModelGenerator = markovModelGenerator;
Options = options.Value;
}
public SnapshotServer(string address, ISnapshotGenerator snapshotGenerator)
{
if (snapshotGenerator == null)
{
throw new ArgumentNullException(nameof(snapshotGenerator));
}
_address = address;
_snapshotGenerator = snapshotGenerator;
_actor = NetMQActor.Create(Run);
}
unsafe public void GenerateSnapshot(ISnapshotGenerator snapshotGenerator, float simTime)
{
var time = snapshotGenerator.WorldTick;
GameDebug.Assert(time > serverTime); // Time should always flow forward
GameDebug.Assert(m_MapInfo.mapId > 0); // Initialize map before generating snapshot
++m_ServerSequence;
// We currently keep entities around until every client has ack'ed the snapshot with the despawn
// Then we delete them from our list and recycle the id
// TODO: we do not need this anymore?
// Find oldest (smallest seq no) acked snapshot.
var minClientAck = int.MaxValue;
foreach (var pair in _serverConnections)
{
var c = pair.Value;
// If a client is so far behind that we have to send non-baseline updates to it
// there is no reason to keep despawned entities around for this clients sake
if (m_ServerSequence - c.maxSnapshotAck >= NetworkConfig.snapshotDeltaCacheSize - 2) // -2 because we want 3 baselines!
{
continue;
}
var acked = c.maxSnapshotAck;
if (acked < minClientAck)
{
minClientAck = acked;
}
}
// Recycle despawned entities that have been acked by all
for (int i = 0; i < m_Entities.Count; i++)
{
var e = m_Entities[i];
if (e.despawnSequence > 0 && e.despawnSequence < minClientAck)
{
//if (serverDebugEntityIds.IntValue > 1)
// GameDebug.Log("Recycling entity id: " + i + " because despawned in " + e.despawnSequence + " and minAck is now " + minClientAck);
e.Reset();
m_FreeEntities.Add(i);
}
}
serverTime = time;
m_ServerSimTime = simTime;
m_LastEntityCount = 0;
// Grab world snapshot from circular buffer
var worldsnapshot = m_Snapshots[m_ServerSequence % m_Snapshots.Length];
worldsnapshot.serverTime = time;
worldsnapshot.length = 0;
// Run through all the registered network entities and serialize the snapshot
for (var id = 0; id < m_Entities.Count; id++)
{
var entity = m_Entities[id];
// Skip freed
if (entity.spawnSequence == 0)
{
continue;
}
// Skip entities that are depawned
if (entity.despawnSequence > 0)
{
continue;
}
// If we are here and are despawned, we must be a despawn/spawn in same frame situation
GameDebug.Assert(entity.despawnSequence == 0 || entity.despawnSequence == entity.spawnSequence, "Snapshotting entity that was deleted in the past?");
GameDebug.Assert(entity.despawnSequence == 0 || entity.despawnSequence == m_ServerSequence, "WUT");
// For now we generate the entity type info the first time we generate a snapshot
// for the particular entity as a more lightweight approach rather than introducing
// a full schema system where the game code must generate and register the type
EntityTypeInfo typeInfo;
bool generateSchema = false;
if (!m_EntityTypes.TryGetValue(entity.typeId, out typeInfo))
{
typeInfo = new EntityTypeInfo()
{
name = snapshotGenerator.GenerateEntityName(id), typeId = entity.typeId, createdSequence = m_ServerSequence, schema = new NetworkSchema(entity.typeId + NetworkConfig.firstEntitySchemaId)
};
m_EntityTypes.Add(entity.typeId, typeInfo);
generateSchema = true;
}
// Generate entity snapshot
var snapshotInfo = entity.snapshots.Acquire(m_ServerSequence);
snapshotInfo.start = worldsnapshot.data + worldsnapshot.length;
var writer = new NetworkWriter(snapshotInfo.start, NetworkConfig.maxWorldSnapshotDataSize / 4 - worldsnapshot.length, typeInfo.schema, generateSchema);
snapshotGenerator.GenerateEntitySnapshot(id, ref writer);
writer.Flush();
snapshotInfo.length = writer.GetLength();
worldsnapshot.length += snapshotInfo.length;
if (entity.despawnSequence == 0)
{
m_LastEntityCount++;
}
GameDebug.Assert(snapshotInfo.length > 0, "Tried to generate a entity snapshot but no data was delivered by generator?");
if (generateSchema)
{
GameDebug.Assert(typeInfo.baseline == null, "Generating schema twice?");
// First time a type/schema is encountered, we clone the serialized data and
// use it as the type-baseline
typeInfo.baseline = (uint *)UnsafeUtility.Malloc(snapshotInfo.length * 4, UnsafeUtility.AlignOf <UInt32>(), Unity.Collections.Allocator.Persistent);// new uint[snapshot.length];// (uint[])snapshot.data.Clone();
for (int i = 0; i < snapshotInfo.length; i++)
{
typeInfo.baseline[i] = *(snapshotInfo.start + i);
}
}
// Check if it is different from the previous generated snapshot
var dirty = !entity.snapshots.Exists(m_ServerSequence - 1);
if (!dirty)
{
var previousSnapshot = entity.snapshots[m_ServerSequence - 1];
if (previousSnapshot.length != snapshotInfo.length || // TODO how could length differ???
UnsafeUtility.MemCmp(previousSnapshot.start, snapshotInfo.start, snapshotInfo.length) != 0)
{
dirty = true;
}
}
if (dirty)
{
entity.updateSequence = m_ServerSequence;
}
//statsGeneratedEntitySnapshots++;
//statsSnapshotData += snapshotInfo.length;
}
//statsGeneratedSnapshotSize += worldsnapshot.length * 4;
}
