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Synchronizer.cpp
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441 lines (335 loc) · 10.7 KB
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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <SFNUL/Synchronizer.hpp>
#include <SFNUL/Utility.hpp>
#include <SFNUL/TcpSocket.hpp>
#include <SFNUL/Link.hpp>
#include <SFNUL/Message.hpp>
#include <SFNUL/MakeUnique.hpp>
#include <cassert>
#include <algorithm>
namespace sfn {
const Link<ReliableTransport>::stream_id_type SynchronizerBase::stream_id = 200;
SynchronizerBase::~SynchronizerBase() {
}
SyncedObject* SynchronizerBase::GetObjectByID( SyncedObject::id_type id ) {
auto iter = std::find_if( std::begin( m_objects ), std::end( m_objects ),
[id]( SyncedObject* object ) {
return object->GetID() == id;
}
);
if( iter == std::end( m_objects ) ) {
ErrorMessage() << "SynchronizerBase::GetObjectByID() Error: Failed to find object " << id << "\n";
}
assert( iter != std::end( m_objects ) );
assert( *iter );
return *iter;
}
void SynchronizerBase::MoveObject( SyncedObject* object_old, SyncedObject* object_new ) {
if( object_old != object_new ) {
auto iter = std::find( std::begin( m_objects ), std::end( m_objects ), object_old );
if( iter != std::end( m_objects ) ) {
( *iter ) = object_new;
}
}
}
bool SynchronizerBase::IsDestroyed() const {
return m_destroyed;
}
SynchronizerServer::SynchronizerServer() {
}
SynchronizerServer::~SynchronizerServer() {
m_destroyed = true;
for( auto o : m_objects ) {
o->SetSynchronizer( nullptr );
}
}
SynchronizerServer::SynchronizerServer( SynchronizerServer&& synchronizer ) {
std::swap( m_objects, synchronizer.m_objects );
for( auto o : m_objects ) {
o->SetSynchronizer( this );
}
}
SynchronizerServer& SynchronizerServer::operator=( SynchronizerServer&& synchronizer ) {
std::swap( m_objects, synchronizer.m_objects );
for( auto o : m_objects ) {
o->SetSynchronizer( this );
}
return *this;
}
bool SynchronizerServer::AddClient( std::weak_ptr<Link<TcpSocket>> client_link ) {
auto shared_client_link = client_link.lock();
if( !shared_client_link ) {
return false;
}
auto iter = std::find_if( std::begin( m_links ), std::end( m_links ),
[&shared_client_link]( const std::weak_ptr<Link<TcpSocket>>& element ) {
// We don't need to check if they are both 0 since we get rid of those while updating.
return shared_client_link == element.lock();
}
);
if( iter == std::end( m_links ) ) {
m_links.emplace_back( client_link );
for( auto o : m_objects ) {
auto message = o->Serialize( SynchronizationType::Static );
o->GetID() >> message;
o->GetTypeID() >> message;
sync_type::create >> message;
shared_client_link->Send( stream_id, message );
}
return true;
}
return false;
}
bool SynchronizerServer::RemoveClient( std::weak_ptr<Link<TcpSocket>> client_link ) {
auto shared_client_link = client_link.lock();
if( !shared_client_link ) {
return false;
}
auto iter = std::find_if( std::begin( m_links ), std::end( m_links ),
[&shared_client_link]( const std::weak_ptr<Link<TcpSocket>>& element ) {
// We don't need to check if they are both 0 since we get rid of those while updating.
return shared_client_link == element.lock();
}
);
if( iter != std::end( m_links ) ) {
m_links.erase( iter );
return true;
}
return false;
}
void SynchronizerServer::Update() {
for( auto o : m_objects ) {
o->CheckStreamUpdate();
}
Send();
}
bool SynchronizerServer::AddObject( SyncedObject* object ) {
if( object->GetID() == SyncedObject::invalid_id ) {
return false;
}
auto iter = std::find( std::begin( m_objects ), std::end( m_objects ), object );
if( iter == std::end( m_objects ) ) {
m_objects.emplace_back( object );
m_updates[object->GetID()] = sync_type::create;
return true;
}
return false;
}
void SynchronizerServer::UpdateObject( SyncedObject* object ) {
auto iter = m_updates.find( object->GetID() );
if( ( iter == std::end( m_updates ) ) || ( iter->second != sync_type::create ) ) {
m_updates[object->GetID()] = sync_type::update;
}
}
bool SynchronizerServer::RemoveObject( SyncedObject* object ) {
if( object->GetID() == SyncedObject::invalid_id ) {
return false;
}
auto iter = std::find( std::begin( m_objects ), std::end( m_objects ), object );
if( iter != std::end( m_objects ) ) {
m_objects.erase( iter );
auto update_object = m_updates.find( object->GetID() );
if( update_object != std::end( m_updates ) ) {
if( update_object->second == sync_type::create ) {
m_updates.erase( update_object );
}
else if( update_object->second == sync_type::update ) {
update_object->second = sync_type::destroy;
}
}
else {
m_updates.emplace( object->GetID(), sync_type::destroy );
}
return true;
}
return false;
}
void SynchronizerServer::Send() {
for( const auto& u : m_updates ) {
if( u.first == SyncedObject::invalid_id ) {
continue;
}
Message message;
if( u.second == sync_type::create ) {
auto object = GetObjectByID( u.first );
message = object->Serialize( SynchronizationType::Static );
u.first >> message;
object->GetTypeID() >> message;
sync_type::create >> message;
}
else if( u.second == sync_type::update ) {
message = GetObjectByID( u.first )->Serialize( SynchronizationType::Dynamic );
u.first >> message;
sync_type::update >> message;
}
else if( u.second == sync_type::destroy ) {
u.first >> message;
sync_type::destroy >> message;
}
for( auto iter = std::begin( m_links ); iter != std::end( m_links ); ) {
auto client_link = iter->lock();
if( !client_link || !client_link->GetTransport() || !client_link->GetTransport()->IsConnected() || client_link->GetTransport()->RemoteHasShutdown() || client_link->GetTransport()->LocalHasShutdown() ) {
iter = m_links.erase( iter );
continue;
}
client_link->Send( stream_id, message );
++iter;
}
}
m_updates.clear();
}
SynchronizerClient::SynchronizerClient() {
}
SynchronizerClient::~SynchronizerClient() {
m_destroyed = true;
for( auto o : m_objects ) {
o->SetSynchronizer( nullptr );
}
}
SynchronizerClient::SynchronizerClient( SynchronizerClient&& synchronizer ) {
std::swap( m_objects, synchronizer.m_objects );
for( auto o : m_objects ) {
o->SetSynchronizer( this );
}
}
SynchronizerClient& SynchronizerClient::operator=( SynchronizerClient&& synchronizer ) {
std::swap( m_objects, synchronizer.m_objects );
for( auto o : m_objects ) {
o->SetSynchronizer( this );
}
return *this;
}
bool SynchronizerClient::AddServer( std::weak_ptr<Link<TcpSocket>> server_link ) {
auto shared_server_link = server_link.lock();
if( !shared_server_link ) {
return false;
}
auto iter = std::find_if( std::begin( m_links ), std::end( m_links ),
[&shared_server_link]( const std::weak_ptr<Link<TcpSocket>>& element ) {
// We don't need to check if they are both 0 since we get rid of those while updating.
return shared_server_link == element.lock();
}
);
if( iter == std::end( m_links ) ) {
m_links.emplace_back( server_link );
return true;
}
return false;
}
bool SynchronizerClient::RemoveServer( std::weak_ptr<Link<TcpSocket>> server_link ) {
auto shared_server_link = server_link.lock();
if( !shared_server_link ) {
return false;
}
auto iter = std::find_if( std::begin( m_links ), std::end( m_links ),
[&shared_server_link]( const std::weak_ptr<Link<TcpSocket>>& element ) {
// We don't need to check if they are both 0 since we get rid of those while updating.
return shared_server_link == element.lock();
}
);
if( iter != std::end( m_links ) ) {
m_links.erase( iter );
return true;
}
return false;
}
void SynchronizerClient::Update() {
Receive();
}
bool SynchronizerClient::AddObject( SyncedObject* object ) {
if( object->GetID() == SyncedObject::invalid_id ) {
return false;
}
auto iter = std::find( std::begin( m_objects ), std::end( m_objects ), object );
if( iter == std::end( m_objects ) ) {
m_objects.emplace_back( object );
return true;
}
return false;
}
void SynchronizerClient::UpdateObject( SyncedObject* /*object*/ ) {
}
bool SynchronizerClient::RemoveObject( SyncedObject* object ) {
if( object->GetID() == SyncedObject::invalid_id ) {
return false;
}
auto iter = std::find( std::begin( m_objects ), std::end( m_objects ), object );
if( iter != std::end( m_objects ) ) {
m_objects.erase( iter );
return true;
}
return false;
}
void SynchronizerClient::SetLifetimeManagers( SyncedObject::object_type_id_type type_id, std::function<SyncedObject*()> factory, std::function<void( SyncedObject* )> destructor ) {
m_factories[type_id] = factory;
m_destructors[type_id] = destructor;
}
void SynchronizerClient::Receive() {
for( auto iter = std::begin( m_links ); iter != std::end( m_links ); ) {
auto server = iter->lock();
if( !server || !server->GetTransport() || !server->GetTransport()->IsConnected() || server->GetTransport()->RemoteHasShutdown() || server->GetTransport()->LocalHasShutdown() ) {
iter = m_links.erase( iter );
continue;
}
std::size_t received = 0;
Message message;
do {
received = server->Receive( stream_id, message );
if( received ) {
if( message.GetSize() < sizeof( sync_type ) + sizeof( SyncedObject::id_type ) ) {
WarningMessage() << "Invalid Synchronizer message received by the client.\n";
continue;
}
sync_type update_type;
message >> update_type;
switch( update_type ) {
case sync_type::create: {
SyncedObject::object_type_id_type type;
message >> type;
if( !m_factories[type] ) {
ErrorMessage() << "No factories registered for type " << type << ".\n";
}
assert( m_factories[type] );
SyncedObject::id_type id;
message >> id;
assert( id != SyncedObject::invalid_id );
SyncedObject* object = m_factories[type]();
assert( object );
object->SetSynchronizer( this );
object->SetID( id );
assert( object == GetObjectByID( id ) );
object->Deserialize( message );
break;
}
case sync_type::update: {
SyncedObject::id_type id;
message >> id;
assert( id != SyncedObject::invalid_id );
auto object = GetObjectByID( id );
assert( object );
object->Deserialize( message );
break;
}
case sync_type::destroy: {
SyncedObject::id_type id;
message >> id;
assert( id != SyncedObject::invalid_id );
auto object = GetObjectByID( id );
assert( object );
auto type = object->GetTypeID();
if( !m_destructors[type] ) {
ErrorMessage() << "No destructors registered for type " << type << ".\n";
}
assert( m_destructors[type] );
m_destructors[type]( object );
break;
}
}
}
} while( received );
++iter;
}
}
}