void DistributedObject::annihilate(channel_t sender, bool notify_parent) { unordered_set<channel_t> targets; if(m_parent_id) { targets.insert(location_as_channel(m_parent_id, m_zone_id)); // Leave parent on explicit delete ram if(notify_parent) { DatagramPtr dg = Datagram::create(m_parent_id, sender, STATESERVER_OBJECT_CHANGING_LOCATION); dg->add_doid(m_do_id); dg->add_location(INVALID_DO_ID, 0); dg->add_location(m_parent_id, m_zone_id); route_datagram(dg); } } if(m_owner_channel) { targets.insert(m_owner_channel); } if(m_ai_channel) { targets.insert(m_ai_channel); } DatagramPtr dg = Datagram::create(targets, sender, STATESERVER_OBJECT_DELETE_RAM); dg->add_doid(m_do_id); route_datagram(dg); delete_children(sender); m_stateserver->m_objs.erase(m_do_id); m_log->debug() << "Deleted.\n"; terminate(); }
void DistributedObject::append_required_data(DatagramPtr dg, bool client_only, bool also_owner) { dg->add_doid(m_do_id); dg->add_location(m_parent_id, m_zone_id); dg->add_uint16(m_dclass->get_id()); size_t field_count = m_dclass->get_num_fields(); for(size_t i = 0; i < field_count; ++i) { const Field *field = m_dclass->get_field(i); if(field->has_keyword("required") && !field->as_molecular() && (!client_only || field->has_keyword("broadcast") || field->has_keyword("clrecv") || (also_owner && field->has_keyword("ownrecv")))) { dg->add_data(m_required_fields[field]); } } }
void DistributedObject::handle_datagram(DatagramHandle, DatagramIterator &dgi) { channel_t sender = dgi.read_channel(); uint16_t msgtype = dgi.read_uint16(); switch(msgtype) { case STATESERVER_DELETE_AI_OBJECTS: { if(m_ai_channel != dgi.read_channel()) { m_log->warning() << " received reset for wrong AI channel.\n"; break; // Not my AI! } annihilate(sender); break; } case STATESERVER_OBJECT_DELETE_RAM: { if(m_do_id != dgi.read_doid()) { break; // Not meant for me! } // Delete object annihilate(sender); break; } case STATESERVER_OBJECT_DELETE_CHILDREN: { doid_t r_do_id = dgi.read_doid(); if(r_do_id == m_do_id) { delete_children(sender); } else if(r_do_id == m_parent_id) { annihilate(sender, false); } break; } case STATESERVER_OBJECT_SET_FIELD: { if(m_do_id != dgi.read_doid()) { break; // Not meant for me! } handle_one_update(dgi, sender); break; } case STATESERVER_OBJECT_SET_FIELDS: { if(m_do_id != dgi.read_doid()) { break; // Not meant for me! } uint16_t field_count = dgi.read_uint16(); for(int16_t i = 0; i < field_count; ++i) { if(!handle_one_update(dgi, sender)) { break; } } break; } case STATESERVER_OBJECT_CHANGING_AI: { doid_t r_parent_id = dgi.read_doid(); channel_t new_channel = dgi.read_channel(); m_log->trace() << "Received ChangingAI notification from " << r_parent_id << ".\n"; if(r_parent_id != m_parent_id) { m_log->warning() << "Received AI channel from " << r_parent_id << " but my parent_id is " << m_parent_id << ".\n"; break; } if(m_ai_explicitly_set) { break; } handle_ai_change(new_channel, sender, false); break; } case STATESERVER_OBJECT_SET_AI: { channel_t new_channel = dgi.read_channel(); m_log->trace() << "Updating AI to " << new_channel << ".\n"; handle_ai_change(new_channel, sender, true); break; } case STATESERVER_OBJECT_GET_AI: { m_log->trace() << "Received AI query from " << sender << ".\n"; DatagramPtr dg = Datagram::create(sender, m_do_id, STATESERVER_OBJECT_GET_AI_RESP); dg->add_uint32(dgi.read_uint32()); // Get context dg->add_doid(m_do_id); dg->add_channel(m_ai_channel); route_datagram(dg); break; } case STATESERVER_OBJECT_GET_AI_RESP: { dgi.read_uint32(); // Discard context doid_t r_parent_id = dgi.read_doid(); m_log->trace() << "Received AI query response from " << r_parent_id << ".\n"; if(r_parent_id != m_parent_id) { m_log->warning() << "Received AI channel from " << r_parent_id << " but my parent_id is " << m_parent_id << ".\n"; break; } channel_t new_ai = dgi.read_channel(); if(m_ai_explicitly_set) { break; } handle_ai_change(new_ai, sender, false); break; } case STATESERVER_OBJECT_CHANGING_LOCATION: { doid_t child_id = dgi.read_doid(); doid_t new_parent = dgi.read_doid(); zone_t new_zone = dgi.read_zone(); doid_t r_do_id = dgi.read_doid(); zone_t r_zone = dgi.read_zone(); if(new_parent == m_do_id) { if(m_do_id == r_do_id) { if(new_zone == r_zone) { break; // No change, so do nothing. } auto &children = m_zone_objects[r_zone]; children.erase(child_id); if(children.empty()) { m_zone_objects.erase(r_zone); } } m_zone_objects[new_zone].insert(child_id); DatagramPtr dg = Datagram::create(child_id, m_do_id, STATESERVER_OBJECT_LOCATION_ACK); dg->add_doid(m_do_id); dg->add_zone(new_zone); route_datagram(dg); } else if(r_do_id == m_do_id) { auto &children = m_zone_objects[r_zone]; children.erase(child_id); if(children.empty()) { m_zone_objects.erase(r_zone); } } else { m_log->warning() << "Received changing location from " << child_id << " for " << r_do_id << ", but my id is " << m_do_id << ".\n"; } break; } case STATESERVER_OBJECT_LOCATION_ACK: { doid_t r_parent_id = dgi.read_doid(); zone_t r_zone_id = dgi.read_zone(); if(r_parent_id != m_parent_id) { m_log->trace() << "Received location acknowledgement from " << r_parent_id << " but my parent_id is " << m_parent_id << ".\n"; } else if(r_zone_id != m_zone_id) { m_log->trace() << "Received location acknowledgement for zone " << r_zone_id << " but my zone_id is " << m_zone_id << ".\n"; } else { m_log->trace() << "Parent acknowledged my location change.\n"; m_parent_synchronized = true; } break; } case STATESERVER_OBJECT_SET_LOCATION: { doid_t new_parent = dgi.read_doid(); zone_t new_zone = dgi.read_zone(); m_log->trace() << "Updating location to Parent: " << new_parent << ", Zone: " << new_zone << ".\n"; handle_location_change(new_parent, new_zone, sender); break; } case STATESERVER_OBJECT_GET_LOCATION: { uint32_t context = dgi.read_uint32(); DatagramPtr dg = Datagram::create(sender, m_do_id, STATESERVER_OBJECT_GET_LOCATION_RESP); dg->add_uint32(context); dg->add_doid(m_do_id); dg->add_location(m_parent_id, m_zone_id); route_datagram(dg); break; } case STATESERVER_OBJECT_GET_LOCATION_RESP: { // This case occurs immediately after object creation. // A parent expects to receive a location_resp from each // of its pre-existing children. if(dgi.read_uint32() != STATESERVER_CONTEXT_WAKE_CHILDREN) { m_log->warning() << "Received unexpected GetLocationResp from " << dgi.read_uint32() << ".\n"; break; } // Get DOID of our child doid_t doid = dgi.read_doid(); // Get location doid_t r_parent = dgi.read_doid(); zone_t r_zone = dgi.read_zone(); // Update the child count if(r_parent == m_do_id) { m_zone_objects[r_zone].insert(doid); } break; } case STATESERVER_OBJECT_GET_ALL: { uint32_t context = dgi.read_uint32(); if(dgi.read_doid() != m_do_id) { return; // Not meant for this object! } DatagramPtr dg = Datagram::create(sender, m_do_id, STATESERVER_OBJECT_GET_ALL_RESP); dg->add_uint32(context); append_required_data(dg); append_other_data(dg); route_datagram(dg); break; } case STATESERVER_OBJECT_GET_FIELD: { uint32_t context = dgi.read_uint32(); if(dgi.read_doid() != m_do_id) { return; // Not meant for this object! } uint16_t field_id = dgi.read_uint16(); DatagramPtr raw_field = Datagram::create(); bool success = handle_one_get(raw_field, field_id); DatagramPtr dg = Datagram::create(sender, m_do_id, STATESERVER_OBJECT_GET_FIELD_RESP); dg->add_uint32(context); dg->add_bool(success); if(success) { dg->add_data(raw_field); } route_datagram(dg); break; } case STATESERVER_OBJECT_GET_FIELDS: { uint32_t context = dgi.read_uint32(); if(dgi.read_doid() != m_do_id) { return; // Not meant for this object! } uint16_t field_count = dgi.read_uint16(); // Read our requested fields into a sorted set set<uint16_t> requested_fields; for(int i = 0; i < field_count; ++i) { uint16_t field_id = dgi.read_uint16(); if(!requested_fields.insert(field_id).second) { const dclass::Field* field = m_dclass->get_field_by_id(field_id); if(field != nullptr) { // If it is null, handle_one_get will produce a warning for us later m_log->warning() << "Received duplicate field '" << field->get_name() << "' in get_fields.\n"; } } } // Try to get the values for all the fields bool success = true; uint16_t fields_found = 0; DatagramPtr raw_fields = Datagram::create(); for(auto it = requested_fields.begin(); it != requested_fields.end(); ++it) { uint16_t field_id = *it; uint16_t length = raw_fields->size(); if(!handle_one_get(raw_fields, field_id, true)) { success = false; break; } if(raw_fields->size() > length) { fields_found++; } } // Send get fields response DatagramPtr dg = Datagram::create(sender, m_do_id, STATESERVER_OBJECT_GET_FIELDS_RESP); dg->add_uint32(context); dg->add_bool(success); if(success) { dg->add_uint16(fields_found); dg->add_data(raw_fields); } route_datagram(dg); break; } case STATESERVER_OBJECT_SET_OWNER: { channel_t new_owner = dgi.read_channel(); m_log->trace() << "Updating owner to " << new_owner << "...\n"; if(new_owner == m_owner_channel) { m_log->trace() << "... owner is the same, do nothing.\n"; return; } if(m_owner_channel) { m_log->trace() << "... broadcasting changing owner...\n"; DatagramPtr dg = Datagram::create(m_owner_channel, sender, STATESERVER_OBJECT_CHANGING_OWNER); dg->add_doid(m_do_id); dg->add_channel(new_owner); dg->add_channel(m_owner_channel); route_datagram(dg); } m_owner_channel = new_owner; if(new_owner) { m_log->trace() << "... sending owner entry...\n"; send_owner_entry(new_owner); } m_log->trace() << "... updated owner.\n"; break; } case STATESERVER_OBJECT_GET_ZONE_OBJECTS: case STATESERVER_OBJECT_GET_ZONES_OBJECTS: { uint32_t context = dgi.read_uint32(); doid_t queried_parent = dgi.read_doid(); m_log->trace() << "Handling get_zones_objects with parent '" << queried_parent << "'" << ". My id is " << m_do_id << " and my parent is " << m_parent_id << ".\n"; uint16_t zone_count = 1; if(msgtype == STATESERVER_OBJECT_GET_ZONES_OBJECTS) { zone_count = dgi.read_uint16(); } if(queried_parent == m_parent_id) { // Query was relayed from parent! See if we match any of the zones // and if so, reply: for(uint16_t i = 0; i < zone_count; ++i) { if(dgi.read_zone() == m_zone_id) { // The parent forwarding this request down to us may or may // not yet know about our presence (and therefore have us // included in the count that it sent to the interested // peer). If we are included in this count, we reply with a // normal interest entry. If not, we reply with a standard // location entry and allow the interested peer to resolve // the difference itself. if(m_parent_synchronized) { send_interest_entry(sender, context); } else { send_location_entry(sender); } break; } } } else if(queried_parent == m_do_id) { doid_t child_count = 0; // Start datagram to relay to children DatagramPtr child_dg = Datagram::create(parent_to_children(m_do_id), sender, STATESERVER_OBJECT_GET_ZONES_OBJECTS); child_dg->add_uint32(context); child_dg->add_doid(queried_parent); child_dg->add_uint16(zone_count); // Get all zones requested for(int i = 0; i < zone_count; ++i) { zone_t zone = dgi.read_zone(); child_count += m_zone_objects[zone].size(); child_dg->add_zone(zone); } // Reply to requestor with count of objects expected DatagramPtr count_dg = Datagram::create(sender, m_do_id, STATESERVER_OBJECT_GET_ZONES_COUNT_RESP); count_dg->add_uint32(context); count_dg->add_doid(child_count); route_datagram(count_dg); // Bounce the message down to all children and have them decide // whether or not to reply. // TODO: Is this really that efficient? if(child_count > 0) { route_datagram(child_dg); } } break; } // zones in Astron don't have meaning to the cluster itself // as such, there is no table of zones to query in the network // instead, a zone is said to be active if it has at least one object in it // to get the active zones, get the keys from m_zone_objects and dump them into a std::set<zone_t> // using an std::set ensures that no duplicate zones are sent // TODO: evaluate efficiency on large games with many DistributedObjects case STATESERVER_GET_ACTIVE_ZONES: { uint32_t context = dgi.read_uint32(); std::unordered_set<zone_t> keys; for(auto kv : m_zone_objects) { keys.insert(kv.first); } DatagramPtr dg = Datagram::create(sender, m_do_id, STATESERVER_GET_ACTIVE_ZONES_RESP); dg->add_uint32(context); dg->add_uint16(keys.size()); std::unordered_set<zone_t>::iterator it; for(it = keys.begin(); it != keys.end(); ++it) { dg->add_zone(*it); } route_datagram(dg); break; } default: if(msgtype < STATESERVER_MSGTYPE_MIN || msgtype > STATESERVER_MSGTYPE_MAX) { m_log->warning() << "Received unknown message of type " << msgtype << ".\n"; } else { m_log->trace() << "Ignoring stateserver message of type " << msgtype << ".\n"; } } }
void DistributedObject::handle_location_change(doid_t new_parent, zone_t new_zone, channel_t sender) { doid_t old_parent = m_parent_id; zone_t old_zone = m_zone_id; // Set of channels that must be notified about location_change unordered_set<channel_t> targets; // Notify AI of changing location if(m_ai_channel) { targets.insert(m_ai_channel); } // Notify Owner of changing location if(m_owner_channel) { targets.insert(m_owner_channel); } if(new_parent == m_do_id) { m_log->warning() << "Object cannot be parented to itself.\n"; return; } // Handle parent change if(new_parent != old_parent) { // Unsubscribe from the old parent's child-broadcast channel. if(old_parent) { // If we have an old parent unsubscribe_channel(parent_to_children(m_parent_id)); // Notify old parent of changing location targets.insert(old_parent); // Notify old location of changing location targets.insert(location_as_channel(old_parent, old_zone)); } m_parent_id = new_parent; m_zone_id = new_zone; // Subscribe to new one... if(new_parent) { // If we have a new parent subscribe_channel(parent_to_children(m_parent_id)); if(!m_ai_explicitly_set) { // Ask the new parent what its AI is. DatagramPtr dg = Datagram::create(m_parent_id, m_do_id, STATESERVER_OBJECT_GET_AI); dg->add_uint32(m_next_context++); route_datagram(dg); } targets.insert(new_parent); // Notify new parent of changing location } else if(!m_ai_explicitly_set) { m_ai_channel = 0; } } else if(new_zone != old_zone) { m_zone_id = new_zone; // Notify parent of changing zone targets.insert(m_parent_id); // Notify old location of changing location targets.insert(location_as_channel(m_parent_id, old_zone)); } else { return; // Not actually changing location, no need to handle. } // Send changing location message DatagramPtr dg = Datagram::create(targets, sender, STATESERVER_OBJECT_CHANGING_LOCATION); dg->add_doid(m_do_id); dg->add_location(new_parent, new_zone); dg->add_location(old_parent, old_zone); route_datagram(dg); // At this point, the new parent (which may or may not be the same as the // old parent) is unaware of our existence in this zone. m_parent_synchronized = false; // Send enter location message if(new_parent) { send_location_entry(location_as_channel(new_parent, new_zone)); } }