void Client::handle_object_entrance(DatagramIterator &dgi, bool other)
{
doid_t do_id = dgi.read_doid();
doid_t parent = dgi.read_doid();
zone_t zone = dgi.read_zone();
uint16_t dc_id = dgi.read_uint16();
// this object is no longer pending
m_pending_objects.erase(do_id);
if(m_owned_objects.find(do_id) != m_owned_objects.end() ||
m_seen_objects.find(do_id) != m_seen_objects.end()) {
return;
}
if(m_visible_objects.find(do_id) == m_visible_objects.end()) {
VisibleObject obj;
obj.id = do_id;
obj.dcc = g_dcf->get_class_by_id(dc_id);
obj.parent = parent;
obj.zone = zone;
m_visible_objects[do_id] = obj;
}
m_seen_objects.insert(do_id);
handle_add_object(do_id, parent, zone, dc_id, dgi, other);
}
void StateServer::handle_generate(DatagramIterator &dgi, bool has_other)
{
doid_t do_id = dgi.read_doid();
doid_t parent_id = dgi.read_doid();
zone_t zone_id = dgi.read_zone();
uint16_t dc_id = dgi.read_uint16();
// Make sure the object id is unique
if(m_objs.find(do_id) != m_objs.end()) {
m_log->warning() << "Received generate for already-existing object ID=" << do_id << std::endl;
return;
}
// Make sure the class exists in the file
const Class *dc_class = g_dcf->get_class_by_id(dc_id);
if(!dc_class) {
m_log->error() << "Received create for unknown dclass with class id '" << dc_id << "'\n";
return;
}
// Create the object
DistributedObject *obj;
try {
obj = new DistributedObject(this, do_id, parent_id, zone_id, dc_class, dgi, has_other);
} catch(const DatagramIteratorEOF&) {
m_log->error() << "Received truncated generate for "
<< dc_class->get_name() << "(" << do_id << ")" << std::endl;
return;
}
m_objs[do_id] = obj;
}
bool DBOperationSet::initialize(channel_t sender, uint16_t msg_type, DatagramIterator &dgi)
{
m_sender = sender;
m_type = SET_FIELDS;
m_doid = dgi.read_doid();
uint16_t field_count;
if(msg_type == DBSERVER_OBJECT_SET_FIELDS ||
msg_type == DBSERVER_OBJECT_DELETE_FIELDS) {
field_count = dgi.read_uint16();
} else {
field_count = 1;
}
bool delete_values = false;
if(msg_type == DBSERVER_OBJECT_DELETE_FIELD ||
msg_type == DBSERVER_OBJECT_DELETE_FIELDS) {
delete_values = true;
}
if(!populate_set_fields(dgi, field_count, delete_values, false)) {
on_failure();
return false;
}
return true;
}
void DBStateServer::handle_get_all(channel_t sender, DatagramIterator &dgi)
{
uint32_t r_context = dgi.read_uint32();
doid_t r_do_id = dgi.read_doid();
if(is_activated_object(r_do_id)) {
return;
}
m_log->trace() << "Received GetAll for inactive object with id " << r_do_id << std::endl;
// Get context for db query, and remember caller with it
uint32_t db_context = m_next_context++;
DatagramPtr resp_dg = Datagram::create(sender, r_do_id, STATESERVER_OBJECT_GET_ALL_RESP);
resp_dg->add_uint32(r_context);
resp_dg->add_doid(r_do_id);
resp_dg->add_channel(INVALID_CHANNEL); // Location
m_context_datagrams[db_context] = resp_dg;
// Cache the do_id --> context in case we get a dbss_activate
m_inactive_loads[r_do_id].insert(db_context);
// Send query to database
DatagramPtr dg = Datagram::create(m_db_channel, r_do_id, DBSERVER_OBJECT_GET_ALL);
dg->add_uint32(db_context);
dg->add_doid(r_do_id);
route_datagram(dg);
}
void DBStateServer::handle_get_activated(channel_t sender, DatagramIterator& dgi)
{
uint32_t r_context = dgi.read_uint32();
doid_t r_do_id = dgi.read_doid();
if(m_loading.find(r_do_id) != m_loading.end()) {
return;
}
m_log->trace() << "Received GetActivated for id " << r_do_id << "\n";
if(m_objs.find(r_do_id) != m_objs.end()) {
// If object is active return true
DatagramPtr dg = Datagram::create(sender, r_do_id, DBSS_OBJECT_GET_ACTIVATED_RESP);
dg->add_uint32(r_context);
dg->add_doid(r_do_id);
dg->add_bool(true);
route_datagram(dg);
} else {
// If object isn't active or loading, we can return false
DatagramPtr dg = Datagram::create(sender, r_do_id, DBSS_OBJECT_GET_ACTIVATED_RESP);
dg->add_uint32(r_context);
dg->add_doid(r_do_id);
dg->add_bool(false);
route_datagram(dg);
}
}
bool DBOperationGet::initialize(channel_t sender, uint16_t msg_type, DatagramIterator &dgi)
{
m_sender = sender;
m_context = dgi.read_uint32();
m_doid = dgi.read_doid();
if(msg_type == DBSERVER_OBJECT_GET_ALL) {
m_type = GET_OBJECT;
m_resp_msgtype = DBSERVER_OBJECT_GET_ALL_RESP;
return true;
}
m_type = GET_FIELDS;
uint16_t field_count = 1;
if(msg_type == DBSERVER_OBJECT_GET_FIELD) {
m_resp_msgtype = DBSERVER_OBJECT_GET_FIELD_RESP;
} else if(msg_type == DBSERVER_OBJECT_GET_FIELDS) {
field_count = dgi.read_uint16();
m_resp_msgtype = DBSERVER_OBJECT_GET_FIELDS_RESP;
}
return populate_get_fields(dgi, field_count);
}
bool DBOperationDelete::initialize(channel_t sender, uint16_t, DatagramIterator &dgi)
{
m_sender = sender;
m_type = DELETE_OBJECT;
m_doid = dgi.read_doid();
return true;
}
void DBStateServer::handle_activate(DatagramIterator &dgi, bool has_other)
{
doid_t do_id = dgi.read_doid();
doid_t parent_id = dgi.read_doid();
zone_t zone_id = dgi.read_zone();
// Check object is not already active
if(m_objs.find(do_id) != m_objs.end() || m_loading.find(do_id) != m_loading.end()) {
m_log->warning() << "Received activate for already-active object with id " << do_id << "\n";
return;
}
if(!has_other) {
auto load_it = m_inactive_loads.find(do_id);
if(load_it == m_inactive_loads.end()) {
m_loading[do_id] = new LoadingObject(this, do_id, parent_id, zone_id);
m_loading[do_id]->begin();
} else {
m_loading[do_id] = new LoadingObject(this, do_id, parent_id, zone_id, load_it->second);
}
} else {
uint16_t dc_id = dgi.read_uint16();
// Check id is a valid type id
if(dc_id >= g_dcf->get_num_types()) {
m_log->error() << "Received activate_other with unknown dclass"
" with id " << dc_id << "\n";
return;
}
const Class *dcc = g_dcf->get_class_by_id(dc_id);
if(!dcc) {
m_log->error() << "Tried to activate_other with non-class distributed_type '"
<< g_dcf->get_class_by_id(dc_id)->get_name() << "'\n";
}
auto load_it = m_inactive_loads.find(do_id);
if(load_it == m_inactive_loads.end()) {
m_loading[do_id] = new LoadingObject(this, do_id, parent_id, zone_id, dcc, dgi);
m_loading[do_id]->begin();
} else {
m_loading[do_id] = new LoadingObject(this, do_id, parent_id, zone_id, dcc, dgi, load_it->second);
}
}
}
void DBStateServer::handle_get_field(channel_t sender, DatagramIterator &dgi)
{
uint32_t r_context = dgi.read_uint32();
doid_t r_do_id = dgi.read_doid();
uint16_t field_id = dgi.read_uint16();
if(is_activated_object(r_do_id)) {
return;
}
m_log->trace() << "Received GetField for field with id " << field_id
<< " on inactive object with id " << r_do_id << "\n";
// Check field is "ram db" or "required"
const Field* field = g_dcf->get_field_by_id(field_id);
if(!field || !(field->has_keyword("required") || field->has_keyword("ram"))) {
DatagramPtr dg = Datagram::create(sender, r_do_id, STATESERVER_OBJECT_GET_FIELD_RESP);
dg->add_uint32(r_context);
dg->add_bool(false);
route_datagram(dg);
return;
}
if(field->has_keyword("db")) {
// Get context for db query
uint32_t db_context = m_next_context++;
// Prepare reponse datagram
DatagramPtr dg_resp = Datagram::create(sender, r_do_id, STATESERVER_OBJECT_GET_FIELD_RESP);
dg_resp->add_uint32(r_context);
m_context_datagrams[db_context] = dg_resp;
// Send query to database
DatagramPtr dg = Datagram::create(m_db_channel, r_do_id, DBSERVER_OBJECT_GET_FIELD);
dg->add_uint32(db_context);
dg->add_doid(r_do_id);
dg->add_uint16(field_id);
route_datagram(dg);
} else if(field->has_default_value()) { // Field is required and not-db
DatagramPtr dg = Datagram::create(sender, r_do_id, STATESERVER_OBJECT_GET_FIELD_RESP);
dg->add_uint32(r_context);
dg->add_bool(true);
dg->add_uint16(field_id);
dg->add_data(field->get_default_value());
route_datagram(dg);
} else {
DatagramPtr dg = Datagram::create(sender, r_do_id, STATESERVER_OBJECT_GET_FIELD_RESP);
dg->add_uint32(r_context);
dg->add_bool(false);
route_datagram(dg);
}
}
void DBStateServer::handle_delete_disk(channel_t sender, DatagramIterator& dgi)
{
doid_t do_id = dgi.read_doid();
if(m_loading.find(do_id) != m_loading.end()) {
// Ignore this message for now, it'll be bounced back to us
// from the loading object if it succeeds or fails at loading.
return;
}
// If object exists broadcast the delete message
auto obj_keyval = m_objs.find(do_id);
if(obj_keyval != m_objs.end()) {
DistributedObject* obj = obj_keyval->second;
std::unordered_set<channel_t> targets;
// Add location to broadcast
if(obj->get_location()) {
targets.insert(obj->get_location());
}
// Add AI to broadcast
if(obj->get_ai()) {
targets.insert(obj->get_ai());
}
// Add owner to broadcast
if(obj->get_owner()) {
targets.insert(obj->get_owner());
}
// Build and send datagram
DatagramPtr dg = Datagram::create(targets, sender, DBSS_OBJECT_DELETE_DISK);
dg->add_doid(do_id);
route_datagram(dg);
}
// Send delete to database
DatagramPtr dg = Datagram::create(m_db_channel, do_id, DBSERVER_OBJECT_DELETE);
dg->add_doid(do_id);
route_datagram(dg);
}
// build_interest will build an interest from a datagram. It is expected that the datagram
// iterator is positioned such that next item to be read is the interest_id.
void Client::build_interest(DatagramIterator &dgi, bool multiple, Interest &out)
{
uint16_t interest_id = dgi.read_uint16();
doid_t parent = dgi.read_doid();
out.id = interest_id;
out.parent = parent;
uint16_t count = 1;
if(multiple) {
count = dgi.read_uint16();
}
// TODO: We shouldn't have to do this ourselves, figure out where else we're doing
// something wrong.
out.zones.rehash((unsigned int)(ceil(count / out.zones.max_load_factor())));
for(uint16_t x{}; x < count; ++x) {
zone_t zone = dgi.read_zone();
out.zones.insert(out.zones.end(), zone);
}
}
void DBStateServer::handle_set_fields(DatagramIterator &dgi)
{
doid_t do_id = dgi.read_doid();
if(m_loading.find(do_id) != m_loading.end()) {
// Ignore this message for now, it'll be bounced back to us
// from the loading object if it succeeds or fails at loading.
return;
}
uint16_t field_count = dgi.read_uint16();
FieldValues db_fields;
for(uint16_t i = 0; i < field_count; ++i) {
uint16_t field_id = dgi.read_uint16();
const Field* field = g_dcf->get_field_by_id(field_id);
if(!field) {
m_log->warning() << "Received invalid field with id " << field_id << " in SetFields.\n";
return;
}
if(field->has_keyword("db")) {
dgi.unpack_field(field, db_fields[field]);
} else {
dgi.skip_field(field);
}
}
if(db_fields.size() > 0) {
m_log->trace() << "Forwarding SetFields on object with id " << do_id << " to database.\n";
DatagramPtr dg = Datagram::create(m_db_channel, do_id, DBSERVER_OBJECT_SET_FIELDS);
dg->add_doid(do_id);
dg->add_uint16(db_fields.size());
for(const auto& it : db_fields) {
dg->add_uint16(it.first->get_id());
dg->add_data(it.second);
}
route_datagram(dg);
}
}
void DBStateServer::handle_set_field(DatagramIterator &dgi)
{
doid_t do_id = dgi.read_doid();
if(m_loading.find(do_id) != m_loading.end()) {
// Ignore this message for now, it'll be bounced back to us
// from the loading object if it succeeds or fails at loading.
return;
}
uint16_t field_id = dgi.read_uint16();
const Field* field = g_dcf->get_field_by_id(field_id);
if(field && field->has_keyword("db")) {
m_log->trace() << "Forwarding SetField for field \"" << field->get_name()
<< "\" on object with id " << do_id << " to database.\n";
DatagramPtr dg = Datagram::create(m_db_channel, do_id, DBSERVER_OBJECT_SET_FIELD);
dg->add_doid(do_id);
dg->add_uint16(field_id);
dg->add_data(dgi.read_remainder());
route_datagram(dg);
}
}
bool DBOperationUpdate::initialize(channel_t sender, uint16_t msg_type, DatagramIterator &dgi)
{
m_sender = sender;
m_type = UPDATE_FIELDS;
m_context = dgi.read_uint32();
m_doid = dgi.read_doid();
uint16_t field_count;
if(msg_type == DBSERVER_OBJECT_SET_FIELDS_IF_EQUALS) {
field_count = dgi.read_uint16();
} else {
field_count = 1;
}
bool check_values = true;
if(msg_type == DBSERVER_OBJECT_SET_FIELD_IF_EQUALS) {
m_resp_msgtype = DBSERVER_OBJECT_SET_FIELD_IF_EQUALS_RESP;
} else if(msg_type == DBSERVER_OBJECT_SET_FIELDS_IF_EQUALS) {
m_resp_msgtype = DBSERVER_OBJECT_SET_FIELDS_IF_EQUALS_RESP;
} else if(msg_type == DBSERVER_OBJECT_SET_FIELD_IF_EMPTY) {
m_resp_msgtype = DBSERVER_OBJECT_SET_FIELD_IF_EMPTY_RESP;
check_values = false;
}
if(!populate_set_fields(dgi, field_count, false, check_values)) {
on_failure();
return false;
}
if(msg_type == DBSERVER_OBJECT_SET_FIELD_IF_EMPTY) {
// We must satisfy the IF_EMPTY constraint here, because we don't
// handle it in populate_set_fields.
m_criteria_fields[m_set_fields.begin()->first]; // Force insertion of blank vector
}
return true;
}
// handle_datagram is the handler for datagrams received from the Astron cluster
void Client::handle_datagram(DatagramHandle in_dg, DatagramIterator &dgi)
{
lock_guard<recursive_mutex> lock(m_client_lock);
if(is_terminated()) {
return;
}
channel_t sender = dgi.read_channel();
if(sender == m_channel) {
return; // ignore messages from ourselves
}
uint16_t msgtype = dgi.read_uint16();
switch(msgtype) {
case CLIENTAGENT_EJECT: {
uint16_t reason = dgi.read_uint16();
string error_string = dgi.read_string();
send_disconnect(reason, error_string);
return;
}
break;
case CLIENTAGENT_DROP: {
handle_drop();
return;
}
break;
case CLIENTAGENT_SET_STATE: {
m_state = (ClientState)dgi.read_uint16();
}
break;
case CLIENTAGENT_ADD_INTEREST: {
uint32_t context = m_next_context++;
Interest i;
build_interest(dgi, false, i);
handle_add_interest(i, context);
add_interest(i, context, sender);
}
break;
case CLIENTAGENT_ADD_INTEREST_MULTIPLE: {
uint32_t context = m_next_context++;
Interest i;
build_interest(dgi, true, i);
handle_add_interest(i, context);
add_interest(i, context, sender);
}
break;
case CLIENTAGENT_REMOVE_INTEREST: {
uint32_t context = m_next_context++;
uint16_t id = dgi.read_uint16();
Interest &i = m_interests[id];
handle_remove_interest(id, context);
remove_interest(i, context, sender);
}
break;
case CLIENTAGENT_SET_CLIENT_ID: {
if(m_channel != m_allocated_channel) {
unsubscribe_channel(m_channel);
}
m_channel = dgi.read_channel();
subscribe_channel(m_channel);
}
break;
case CLIENTAGENT_SEND_DATAGRAM: {
DatagramPtr forward = Datagram::create();
forward->add_data(dgi.read_string());
forward_datagram(forward);
}
break;
case CLIENTAGENT_OPEN_CHANNEL: {
subscribe_channel(dgi.read_channel());
}
break;
case CLIENTAGENT_CLOSE_CHANNEL: {
unsubscribe_channel(dgi.read_channel());
}
break;
case CLIENTAGENT_ADD_POST_REMOVE: {
add_post_remove(m_allocated_channel, dgi.read_datagram());
}
break;
case CLIENTAGENT_CLEAR_POST_REMOVES: {
clear_post_removes(m_allocated_channel);
}
break;
case CLIENTAGENT_DECLARE_OBJECT: {
doid_t do_id = dgi.read_doid();
uint16_t dc_id = dgi.read_uint16();
if(m_declared_objects.find(do_id) != m_declared_objects.end()) {
m_log->warning() << "Received object declaration for previously declared object "
<< do_id << ".\n";
return;
}
DeclaredObject obj;
obj.id = do_id;
obj.dcc = g_dcf->get_class_by_id(dc_id);
m_declared_objects[do_id] = obj;
}
break;
case CLIENTAGENT_UNDECLARE_OBJECT: {
doid_t do_id = dgi.read_doid();
if(m_declared_objects.find(do_id) == m_declared_objects.end()) {
m_log->warning() << "Received undeclare object for unknown object "
<< do_id << ".\n";
return;
}
m_declared_objects.erase(do_id);
}
break;
case CLIENTAGENT_SET_FIELDS_SENDABLE: {
doid_t do_id = dgi.read_doid();
uint16_t field_count = dgi.read_uint16();
unordered_set<uint16_t> fields;
for(uint16_t i{}; i < field_count; ++i) {
fields.insert(dgi.read_uint16());
}
m_fields_sendable[do_id] = fields;
}
break;
case CLIENTAGENT_ADD_SESSION_OBJECT: {
doid_t do_id = dgi.read_doid();
if(m_session_objects.find(do_id) != m_session_objects.end()) {
m_log->warning() << "Received add session object for existing session object "
<< do_id << ".\n";
return;
}
m_log->debug() << "Added session object with id " << do_id << ".\n";
m_session_objects.insert(do_id);
}
break;
case CLIENTAGENT_REMOVE_SESSION_OBJECT: {
doid_t do_id = dgi.read_doid();
if(m_session_objects.find(do_id) == m_session_objects.end()) {
m_log->warning() << "Received remove session object for non-session object "
<< do_id << ".\n";
return;
}
m_log->debug() << "Removed session object with id " << do_id << ".\n";
m_session_objects.erase(do_id);
}
break;
case CLIENTAGENT_GET_NETWORK_ADDRESS: {
DatagramPtr resp = Datagram::create(sender, m_channel, CLIENTAGENT_GET_NETWORK_ADDRESS_RESP);
resp->add_uint32(dgi.read_uint32()); // Context
resp->add_string(get_remote_address());
resp->add_uint16(get_remote_port());
resp->add_string(get_local_address());
resp->add_uint16(get_local_port());
route_datagram(resp);
}
break;
case STATESERVER_OBJECT_SET_FIELD: {
doid_t do_id = dgi.read_doid();
if(!lookup_object(do_id)) {
if(try_queue_pending(do_id, in_dg)) {
return;
}
m_log->warning() << "Received server-side field update for unknown object "
<< do_id << ".\n";
return;
}
if(sender != m_channel) {
uint16_t field_id = dgi.read_uint16();
handle_set_field(do_id, field_id, dgi);
}
}
break;
case STATESERVER_OBJECT_SET_FIELDS: {
doid_t do_id = dgi.read_doid();
if(!lookup_object(do_id)) {
if(try_queue_pending(do_id, in_dg)) {
return;
}
m_log->warning() << "Received server-side multi-field update for unknown object "
<< do_id << ".\n";
return;
}
if(sender != m_channel) {
uint16_t num_fields = dgi.read_uint16();
handle_set_fields(do_id, num_fields, dgi);
}
}
break;
case STATESERVER_OBJECT_DELETE_RAM: {
doid_t do_id = dgi.read_doid();
m_log->trace() << "Received DeleteRam for object with id " << do_id << "\n.";
if(!lookup_object(do_id)) {
if(try_queue_pending(do_id, in_dg)) {
return;
}
m_log->warning() << "Received server-side object delete for unknown object "
<< do_id << ".\n";
return;
}
if(m_session_objects.find(do_id) != m_session_objects.end()) {
// We have to erase the object from our session_objects here, because
// the object has already been deleted and we don't want it to be deleted
// again in the client's destructor.
m_session_objects.erase(do_id);
stringstream ss;
ss << "The session object with id " << do_id << " has been unexpectedly deleted.";
send_disconnect(CLIENT_DISCONNECT_SESSION_OBJECT_DELETED, ss.str());
return;
}
if(m_seen_objects.find(do_id) != m_seen_objects.end()) {
handle_remove_object(do_id);
m_seen_objects.erase(do_id);
}
if(m_owned_objects.find(do_id) != m_owned_objects.end()) {
handle_remove_ownership(do_id);
m_owned_objects.erase(do_id);
}
m_historical_objects.insert(do_id);
m_visible_objects.erase(do_id);
}
break;
case STATESERVER_OBJECT_ENTER_OWNER_WITH_REQUIRED_OTHER:
case STATESERVER_OBJECT_ENTER_OWNER_WITH_REQUIRED: {
doid_t do_id = dgi.read_doid();
doid_t parent = dgi.read_doid();
zone_t zone = dgi.read_zone();
uint16_t dc_id = dgi.read_uint16();
m_owned_objects.insert(do_id);
if(m_visible_objects.find(do_id) == m_visible_objects.end()) {
VisibleObject obj;
obj.id = do_id;
obj.parent = parent;
obj.zone = zone;
obj.dcc = g_dcf->get_class_by_id(dc_id);
m_visible_objects[do_id] = obj;
}
bool with_other = (msgtype == STATESERVER_OBJECT_ENTER_OWNER_WITH_REQUIRED_OTHER);
handle_add_ownership(do_id, parent, zone, dc_id, dgi, with_other);
}
break;
case STATESERVER_OBJECT_ENTER_LOCATION_WITH_REQUIRED:
case STATESERVER_OBJECT_ENTER_LOCATION_WITH_REQUIRED_OTHER: {
doid_t do_id = dgi.read_doid();
doid_t parent = dgi.read_doid();
zone_t zone = dgi.read_zone();
for(auto& it : m_pending_interests) {
InterestOperation *interest_operation = it.second;
if(interest_operation->m_parent == parent &&
interest_operation->m_zones.find(zone) != interest_operation->m_zones.end()) {
interest_operation->queue_datagram(in_dg);
// Add the DoId to m_pending_objects, because while it's not an object
// from opening the interest, we should begin queueing messages for it
m_pending_objects.emplace(do_id, it.first);
return;
}
}
// Object entrance doesn't pertain to any pending iop,
// so seek back to where we started and handle it normally
dgi.seek_payload();
dgi.skip(sizeof(channel_t) + sizeof(uint16_t)); // sender + msgtype
bool with_other = (msgtype == STATESERVER_OBJECT_ENTER_LOCATION_WITH_REQUIRED_OTHER);
handle_object_entrance(dgi, with_other);
}
break;
case STATESERVER_OBJECT_ENTER_INTEREST_WITH_REQUIRED:
case STATESERVER_OBJECT_ENTER_INTEREST_WITH_REQUIRED_OTHER: {
uint32_t request_context = dgi.read_uint32();
auto it = m_pending_interests.find(request_context);
if(it == m_pending_interests.end()) {
m_log->warning() << "Received object entrance into interest with unknown context "
<< request_context << ".\n";
return;
}
m_pending_objects.emplace(dgi.read_doid(), request_context);
it->second->queue_expected(in_dg);
if(it->second->is_ready()) {
it->second->finish();
}
return;
}
break;
case STATESERVER_OBJECT_GET_ZONES_COUNT_RESP: {
uint32_t context = dgi.read_uint32();
// using doid_t because <max_objects_in_zones> == <max_total_objects>
doid_t count = dgi.read_doid();
auto it = m_pending_interests.find(context);
if(it == m_pending_interests.end()) {
m_log->error() << "Received GET_ZONES_COUNT_RESP for unknown context "
<< context << ".\n";
return;
}
it->second->set_expected(count);
if(it->second->is_ready()) {
it->second->finish();
}
}
break;
case STATESERVER_OBJECT_CHANGING_LOCATION: {
doid_t do_id = dgi.read_doid();
if(try_queue_pending(do_id, in_dg)) {
// We received a generate for this object, and the generate is sitting in a pending iop
// we'll just store this dg under the m_pending_datagrams queue on the iop
return;
}
doid_t n_parent = dgi.read_doid();
zone_t n_zone = dgi.read_zone();
bool disable = true;
for(const auto& it : m_interests) {
const Interest& i = it.second;
for(const auto& it2 : i.zones) {
if(it2 == n_zone) {
disable = false;
break;
}
}
}
if(m_visible_objects.find(do_id) != m_visible_objects.end()) {
m_visible_objects[do_id].parent = n_parent;
m_visible_objects[do_id].zone = n_zone;
} else {
// We don't actually *see* this object, we're receiving this
// message as a fluke.
return;
}
if(disable && m_owned_objects.find(do_id) == m_owned_objects.end()) {
if(m_session_objects.find(do_id) != m_session_objects.end()) {
stringstream ss;
ss << "The session object with id " << do_id
<< " has unexpectedly left interest.";
send_disconnect(CLIENT_DISCONNECT_SESSION_OBJECT_DELETED, ss.str());
return;
}
handle_remove_object(do_id);
m_seen_objects.erase(do_id);
m_historical_objects.insert(do_id);
m_visible_objects.erase(do_id);
} else {
handle_change_location(do_id, n_parent, n_zone);
}
}
break;
case STATESERVER_OBJECT_CHANGING_OWNER: {
doid_t do_id = dgi.read_doid();
channel_t n_owner = dgi.read_channel();
dgi.skip(sizeof(channel_t)); // don't care about the old owner
if(n_owner == m_channel) {
// We should already own this object, nothing changes and we
// might get another enter_owner message.
return;
}
if(m_owned_objects.find(do_id) == m_owned_objects.end()) {
m_log->error() << "Received ChangingOwner for unowned object with id "
<< do_id << ".\n";
return;
}
if(m_seen_objects.find(do_id) == m_seen_objects.end()) {
if(m_session_objects.find(do_id) != m_session_objects.end()) {
stringstream ss;
ss << "The session object with id " << do_id
<< " has unexpectedly left ownership.";
send_disconnect(CLIENT_DISCONNECT_SESSION_OBJECT_DELETED, ss.str());
return;
}
handle_remove_ownership(do_id);
m_owned_objects.erase(do_id);
m_historical_objects.insert(do_id);
m_visible_objects.erase(do_id);
}
}
break;
default:
m_log->error() << "Recv'd unknown server msgtype " << msgtype << "\n.";
}
}
void DBStateServer::handle_get_fields(channel_t sender, DatagramIterator &dgi)
{
uint32_t r_context = dgi.read_uint32();
doid_t r_do_id = dgi.read_doid();
uint16_t field_count = dgi.read_uint16();
if(is_activated_object(r_do_id)) {
return;
}
m_log->trace() << "Received GetFields for inactive object with id " << r_do_id << std::endl;
// Read requested fields from datagram
std::vector<const Field*> db_fields; // Ram|required db fields in request
std::vector<const Field*> ram_fields; // Ram|required but not-db fields in request
for(uint16_t i = 0; i < field_count; ++i) {
uint16_t field_id = dgi.read_uint16();
const Field* field = g_dcf->get_field_by_id(field_id);
if(!field) {
DatagramPtr dg = Datagram::create(sender, r_do_id, STATESERVER_OBJECT_GET_FIELDS_RESP);
dg->add_uint32(r_context);
dg->add_uint8(false);
route_datagram(dg);
} else if(field->has_keyword("ram") || field->has_keyword("required")) {
if(field->has_keyword("db")) {
db_fields.push_back(field);
} else {
ram_fields.push_back(field);
}
}
}
if(db_fields.size()) {
// Get context for db query
uint32_t db_context = m_next_context++;
// Prepare reponse datagram
if(m_context_datagrams.find(db_context) == m_context_datagrams.end()) {
m_context_datagrams[db_context] = Datagram::create(sender, r_do_id,
STATESERVER_OBJECT_GET_FIELDS_RESP);
}
m_context_datagrams[db_context]->add_uint32(r_context);
m_context_datagrams[db_context]->add_bool(true);
m_context_datagrams[db_context]->add_uint16(ram_fields.size() + db_fields.size());
for(const auto& it : ram_fields) {
m_context_datagrams[db_context]->add_uint16(it->get_id());
m_context_datagrams[db_context]->add_data(it->get_default_value());
}
// Send query to database
DatagramPtr dg = Datagram::create(m_db_channel, r_do_id, DBSERVER_OBJECT_GET_FIELDS);
dg->add_uint32(db_context);
dg->add_doid(r_do_id);
dg->add_uint16(db_fields.size());
for(const auto& it : db_fields) {
dg->add_uint16(it->get_id());
}
route_datagram(dg);
} else { // If no database fields exist
DatagramPtr dg = Datagram::create(sender, r_do_id, STATESERVER_OBJECT_GET_FIELDS_RESP);
dg->add_uint32(r_context);
dg->add_bool(true);
dg->add_uint16(ram_fields.size());
for(const auto& it : ram_fields) {
dg->add_uint16(it->get_id());
dg->add_data(it->get_default_value());
}
route_datagram(dg);
}
}
// handle_datagram is the handler for datagrams received from the Astron cluster
void Client::handle_datagram(DatagramHandle, DatagramIterator &dgi)
{
std::lock_guard<std::recursive_mutex> lock(m_client_lock);
channel_t sender = dgi.read_channel();
uint16_t msgtype = dgi.read_uint16();
switch(msgtype) {
case CLIENTAGENT_EJECT: {
uint16_t reason = dgi.read_uint16();
std::string error_string = dgi.read_string();
send_disconnect(reason, error_string);
return;
}
break;
case CLIENTAGENT_DROP: {
handle_drop();
return;
}
break;
case CLIENTAGENT_SET_STATE: {
m_state = (ClientState)dgi.read_uint16();
}
break;
case CLIENTAGENT_ADD_INTEREST: {
uint32_t context = m_next_context++;
Interest i;
build_interest(dgi, false, i);
handle_add_interest(i, context);
add_interest(i, context, sender);
}
break;
case CLIENTAGENT_ADD_INTEREST_MULTIPLE: {
uint32_t context = m_next_context++;
Interest i;
build_interest(dgi, true, i);
handle_add_interest(i, context);
add_interest(i, context, sender);
}
break;
case CLIENTAGENT_REMOVE_INTEREST: {
uint32_t context = m_next_context++;
uint16_t id = dgi.read_uint16();
Interest &i = m_interests[id];
handle_remove_interest(id, context);
remove_interest(i, context, sender);
}
break;
case CLIENTAGENT_SET_CLIENT_ID: {
if(m_channel != m_allocated_channel) {
unsubscribe_channel(m_channel);
}
m_channel = dgi.read_channel();
subscribe_channel(m_channel);
}
break;
case CLIENTAGENT_SEND_DATAGRAM: {
DatagramPtr forward = Datagram::create();
forward->add_data(dgi.read_string());
forward_datagram(forward);
}
break;
case CLIENTAGENT_OPEN_CHANNEL: {
subscribe_channel(dgi.read_channel());
}
break;
case CLIENTAGENT_CLOSE_CHANNEL: {
unsubscribe_channel(dgi.read_channel());
}
break;
case CLIENTAGENT_ADD_POST_REMOVE: {
add_post_remove(dgi.read_datagram());
}
break;
case CLIENTAGENT_CLEAR_POST_REMOVES: {
clear_post_removes();
}
break;
case CLIENTAGENT_DECLARE_OBJECT: {
doid_t do_id = dgi.read_doid();
uint16_t dc_id = dgi.read_uint16();
if(m_declared_objects.find(do_id) != m_declared_objects.end()) {
m_log->warning() << "Received object declaration for previously declared object "
<< do_id << ".\n";
return;
}
DeclaredObject obj;
obj.id = do_id;
obj.dcc = g_dcf->get_class_by_id(dc_id);
m_declared_objects[do_id] = obj;
}
break;
case CLIENTAGENT_UNDECLARE_OBJECT: {
doid_t do_id = dgi.read_doid();
if(m_declared_objects.find(do_id) == m_declared_objects.end()) {
m_log->warning() << "Received undeclare object for unknown object "
<< do_id << ".\n";
return;
}
m_declared_objects.erase(do_id);
}
break;
case CLIENTAGENT_SET_FIELDS_SENDABLE: {
doid_t do_id = dgi.read_doid();
uint16_t field_count = dgi.read_uint16();
std::unordered_set<uint16_t> fields;
for(unsigned int i = 0; i < field_count; ++i) {
fields.insert(dgi.read_uint16());
}
m_fields_sendable[do_id] = fields;
}
break;
case CLIENTAGENT_ADD_SESSION_OBJECT: {
doid_t do_id = dgi.read_doid();
if(m_session_objects.find(do_id) != m_session_objects.end()) {
m_log->warning() << "Received add session object for existing session object "
<< do_id << ".\n";
return;
}
m_log->debug() << "Added session object with id " << do_id << ".\n";
m_session_objects.insert(do_id);
}
break;
case CLIENTAGENT_REMOVE_SESSION_OBJECT: {
doid_t do_id = dgi.read_doid();
if(m_session_objects.find(do_id) == m_session_objects.end()) {
m_log->warning() << "Received remove session object for non-session object "
<< do_id << ".\n";
return;
}
m_log->debug() << "Removed session object with id " << do_id << ".\n";
m_session_objects.erase(do_id);
}
break;
case STATESERVER_OBJECT_SET_FIELD: {
doid_t do_id = dgi.read_doid();
if(!lookup_object(do_id)) {
m_log->warning() << "Received server-side field update for unknown object "
<< do_id << ".\n";
return;
}
if(sender != m_channel) {
uint16_t field_id = dgi.read_uint16();
handle_set_field(do_id, field_id, dgi);
}
}
break;
case STATESERVER_OBJECT_SET_FIELDS: {
doid_t do_id = dgi.read_doid();
if(!lookup_object(do_id)) {
m_log->warning() << "Received server-side multi-field update for unknown object "
<< do_id << ".\n";
return;
}
if(sender != m_channel) {
uint16_t num_fields = dgi.read_uint16();
handle_set_fields(do_id, num_fields, dgi);
}
}
break;
case STATESERVER_OBJECT_DELETE_RAM: {
doid_t do_id = dgi.read_doid();
m_log->trace() << "Received DeleteRam for object with id " << do_id << "\n.";
if(!lookup_object(do_id)) {
m_log->warning() << "Received server-side object delete for unknown object "
<< do_id << ".\n";
return;
}
if(m_session_objects.find(do_id) != m_session_objects.end()) {
// We have to erase the object from our session_objects here, because
// the object has already been deleted and we don't want it to be deleted
// again in the client's destructor.
m_session_objects.erase(do_id);
std::stringstream ss;
ss << "The session object with id " << do_id << " has been unexpectedly deleted.";
send_disconnect(CLIENT_DISCONNECT_SESSION_OBJECT_DELETED, ss.str());
return;
}
if(m_seen_objects.find(do_id) != m_seen_objects.end()) {
handle_remove_object(do_id);
m_seen_objects.erase(do_id);
}
if(m_owned_objects.find(do_id) != m_owned_objects.end()) {
handle_remove_ownership(do_id);
m_owned_objects.erase(do_id);
}
m_historical_objects.insert(do_id);
m_visible_objects.erase(do_id);
}
break;
case STATESERVER_OBJECT_ENTER_OWNER_WITH_REQUIRED_OTHER:
case STATESERVER_OBJECT_ENTER_OWNER_WITH_REQUIRED: {
doid_t do_id = dgi.read_doid();
doid_t parent = dgi.read_doid();
zone_t zone = dgi.read_zone();
uint16_t dc_id = dgi.read_uint16();
m_owned_objects.insert(do_id);
if(m_visible_objects.find(do_id) == m_visible_objects.end()) {
VisibleObject obj;
obj.id = do_id;
obj.parent = parent;
obj.zone = zone;
obj.dcc = g_dcf->get_class_by_id(dc_id);
m_visible_objects[do_id] = obj;
}
handle_add_ownership(do_id, parent, zone, dc_id, dgi,
msgtype == STATESERVER_OBJECT_ENTER_OWNER_WITH_REQUIRED_OTHER);
}
break;
case STATESERVER_OBJECT_ENTER_LOCATION_WITH_REQUIRED:
case STATESERVER_OBJECT_ENTER_LOCATION_WITH_REQUIRED_OTHER: {
doid_t do_id = dgi.read_doid();
doid_t parent = dgi.read_doid();
zone_t zone = dgi.read_zone();
uint16_t dc_id = dgi.read_uint16();
if(m_owned_objects.find(do_id) != m_owned_objects.end() ||
m_seen_objects.find(do_id) != m_seen_objects.end()) {
return;
}
if(m_visible_objects.find(do_id) == m_visible_objects.end()) {
VisibleObject obj;
obj.id = do_id;
obj.dcc = g_dcf->get_class_by_id(dc_id);
obj.parent = parent;
obj.zone = zone;
m_visible_objects[do_id] = obj;
}
m_seen_objects.insert(do_id);
handle_add_object(do_id, parent, zone, dc_id, dgi,
msgtype == STATESERVER_OBJECT_ENTER_LOCATION_WITH_REQUIRED_OTHER);
// TODO: This is a tad inefficient as it checks every pending interest.
// In practice, there shouldn't be many add-interest operations active
// at once, however.
std::list<uint32_t> deferred_deletes;
for(auto it = m_pending_interests.begin(); it != m_pending_interests.end(); ++it) {
if(it->second.is_ready(m_visible_objects)) {
notify_interest_done(&it->second);
handle_interest_done(it->second.m_interest_id, it->second.m_client_context);
deferred_deletes.push_back(it->first);
}
}
for(auto it = deferred_deletes.begin(); it != deferred_deletes.end(); ++it) {
m_pending_interests.erase(*it);
}
}
break;
case STATESERVER_OBJECT_GET_ZONES_COUNT_RESP: {
uint32_t context = dgi.read_uint32();
// using doid_t because <max_objects_in_zones> == <max_total_objects>
doid_t count = dgi.read_doid();
auto it = m_pending_interests.find(context);
if(it == m_pending_interests.end()) {
m_log->error() << "Received GET_ZONES_COUNT_RESP for unknown context "
<< context << ".\n";
return;
}
it->second.store_total(count);
if(it->second.is_ready(m_visible_objects)) {
notify_interest_done(&it->second);
handle_interest_done(it->second.m_interest_id,
it->second.m_client_context);
m_pending_interests.erase(context);
}
}
break;
case STATESERVER_OBJECT_CHANGING_LOCATION: {
doid_t do_id = dgi.read_doid();
doid_t n_parent = dgi.read_doid();
zone_t n_zone = dgi.read_zone();
dgi.skip(sizeof(doid_t) + sizeof(zone_t)); // don't care about the old location
bool disable = true;
for(auto it = m_interests.begin(); it != m_interests.end(); ++it) {
Interest &i = it->second;
for(auto it2 = i.zones.begin(); it2 != i.zones.end(); ++it2) {
if(*it2 == n_zone) {
disable = false;
break;
}
}
}
if(m_visible_objects.find(do_id) != m_visible_objects.end()) {
m_visible_objects[do_id].parent = n_parent;
m_visible_objects[do_id].zone = n_zone;
}
if(disable && m_owned_objects.find(do_id) == m_owned_objects.end()) {
if(m_session_objects.find(do_id) != m_session_objects.end()) {
std::stringstream ss;
ss << "The session object with id " << do_id
<< " has unexpectedly left interest.";
send_disconnect(CLIENT_DISCONNECT_SESSION_OBJECT_DELETED, ss.str());
return;
}
handle_remove_object(do_id);
m_seen_objects.erase(do_id);
m_historical_objects.insert(do_id);
m_visible_objects.erase(do_id);
} else {
handle_change_location(do_id, n_parent, n_zone);
}
}
break;
case STATESERVER_OBJECT_CHANGING_OWNER: {
doid_t do_id = dgi.read_doid();
channel_t n_owner = dgi.read_channel();
dgi.skip(sizeof(channel_t)); // don't care about the old owner
if(n_owner == m_channel) {
// We should already own this object, nothing changes and we
// might get another enter_owner message.
return;
}
if(m_owned_objects.find(do_id) == m_owned_objects.end()) {
m_log->error() << "Received ChangingOwner for unowned object with id "
<< do_id << ".\n";
return;
}
if(m_seen_objects.find(do_id) == m_seen_objects.end()) {
if(m_session_objects.find(do_id) != m_session_objects.end()) {
std::stringstream ss;
ss << "The session object with id " << do_id
<< " has unexpectedly left ownership.";
send_disconnect(CLIENT_DISCONNECT_SESSION_OBJECT_DELETED, ss.str());
return;
}
handle_remove_ownership(do_id);
m_owned_objects.erase(do_id);
m_historical_objects.insert(do_id);
m_visible_objects.erase(do_id);
}
}
break;
default:
m_log->error() << "Recv'd unknown server msgtype " << msgtype << "\n.";
}
}
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";
}
}
}
