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#pragma once
#include "async_result.h"
#include "defs.h"
#include "event_loop.h"
#include "left_right_buffer.h"
#include "lfqueue_batch.h"
#include "message_ptr_and_header.h"
#include "nondestroying_holder.h"
#include "remote_connection_status.h"
#include "scheduler_actor.h"
#include "socket_addr.h"
#include "storage.h"
#include "vector_swaps.h"
#include "ybus.h"
#include "misc/granup.h"
#include "misc/tokenquota.h"
#include <library/cpp/messagebus/actor/actor.h>
#include <library/cpp/messagebus/actor/executor.h>
#include <library/cpp/messagebus/actor/queue_for_actor.h>
#include <library/cpp/messagebus/actor/queue_in_actor.h>
#include <library/cpp/messagebus/scheduler/scheduler.h>
#include <util/system/atomic.h>
#include <util/system/event.h>
#include <util/thread/lfstack.h>
namespace NBus {
namespace NPrivate {
class TRemoteConnection;
typedef TIntrusivePtr<TRemoteConnection> TRemoteConnectionPtr;
typedef TIntrusivePtr<TBusSessionImpl> TRemoteSessionPtr;
static void* const WriteCookie = (void*)1;
static void* const ReadCookie = (void*)2;
enum {
WAKE_QUOTA_MSG = 0x01,
WAKE_QUOTA_BYTES = 0x02
};
struct TWriterTag {};
struct TReaderTag {};
struct TReconnectTag {};
struct TWakeReaderTag {};
struct TWriterToReaderSocketMessage {
TSocket Socket;
ui32 SocketVersion;
TWriterToReaderSocketMessage(TSocket socket, ui32 socketVersion)
: Socket(socket)
, SocketVersion(socketVersion)
{
}
};
class TRemoteConnection
: public NEventLoop::IEventHandler,
public ::NActor::TActor<TRemoteConnection, TWriterTag>,
public ::NActor::TActor<TRemoteConnection, TReaderTag>,
private ::NActor::TQueueInActor<TRemoteConnection, TWriterToReaderSocketMessage, TReaderTag>,
private ::NActor::TQueueInActor<TRemoteConnection, ui32, TWriterTag, TReconnectTag>,
private ::NActor::TQueueInActor<TRemoteConnection, ui32, TWriterTag, TWakeReaderTag>,
public TScheduleActor<TRemoteConnection, TWriterTag> {
friend struct TBusSessionImpl;
friend class TRemoteClientSession;
friend class TRemoteServerSession;
friend class ::NActor::TQueueInActor<TRemoteConnection, TWriterToReaderSocketMessage, TReaderTag>;
friend class ::NActor::TQueueInActor<TRemoteConnection, ui32, TWriterTag, TReconnectTag>;
friend class ::NActor::TQueueInActor<TRemoteConnection, ui32, TWriterTag, TWakeReaderTag>;
protected:
::NActor::TQueueInActor<TRemoteConnection, TWriterToReaderSocketMessage, TReaderTag>* ReaderGetSocketQueue() {
return this;
}
::NActor::TQueueInActor<TRemoteConnection, ui32, TWriterTag, TReconnectTag>* WriterGetReconnectQueue() {
return this;
}
::NActor::TQueueInActor<TRemoteConnection, ui32, TWriterTag, TWakeReaderTag>* WriterGetWakeQueue() {
return this;
}
protected:
TRemoteConnection(TRemoteSessionPtr session, ui64 connectionId, TNetAddr addr);
~TRemoteConnection() override;
virtual void ClearOutgoingQueue(TMessagesPtrs&, bool reconnect /* or shutdown */);
public:
void Send(TNonDestroyingAutoPtr<TBusMessage> msg);
void Shutdown(EMessageStatus status);
inline const TNetAddr& GetAddr() const noexcept;
private:
friend class TScheduleConnect;
friend class TWorkIO;
protected:
static size_t MessageSize(TArrayRef<TBusMessagePtrAndHeader>);
bool QuotaAcquire(size_t msg, size_t bytes);
void QuotaConsume(size_t msg, size_t bytes);
void QuotaReturnSelf(size_t items, size_t bytes);
bool QuotaReturnValues(size_t items, size_t bytes);
bool ReaderProcessBuffer();
bool ReaderFillBuffer();
void ReaderFlushMessages();
void ReadQuotaWakeup();
ui32 WriteWakeFlags() const;
virtual bool NeedInterruptRead() {
return false;
}
public:
virtual void TryConnect();
void ProcessItem(TReaderTag, ::NActor::TDefaultTag, TWriterToReaderSocketMessage);
void ProcessItem(TWriterTag, TReconnectTag, ui32 socketVersion);
void ProcessItem(TWriterTag, TWakeReaderTag, ui32 awakeFlags);
void Act(TReaderTag);
inline void WriterBeforeWriteErrorMessage(TBusMessage*, EMessageStatus);
void ClearBeforeSendQueue(EMessageStatus reasonForQueues);
void ClearReplyQueue(EMessageStatus reasonForQueues);
inline void ProcessBeforeSendQueueMessage(TBusMessage*, TInstant now);
void ProcessBeforeSendQueue(TInstant now);
void WriterProcessStatusDown();
void ReaderProcessStatusDown();
void ProcessWriterDown();
void DropEnqueuedData(EMessageStatus reason, EMessageStatus reasonForQueues);
const TRemoteConnectionWriterStatus& WriterGetStatus();
virtual void WriterFillStatus();
void WriterFillInFlight();
virtual void BeforeTryWrite();
void Act(TWriterTag);
void ScheduleRead();
void ScheduleWrite();
void ScheduleShutdownOnServerOrReconnectOnClient(EMessageStatus status, bool writer);
void ScheduleShutdown(EMessageStatus status);
void WriterFlushBuffer();
void WriterFillBuffer();
void ReaderSendStatus(TInstant now, bool force = false);
const TRemoteConnectionReaderStatus& ReaderFillStatus();
void WriterRotateCounters();
void WriterSendStatus(TInstant now, bool force = false);
void WriterSendStatusIfNecessary(TInstant now);
void QuotaReturnAside(size_t items, size_t bytes);
virtual void ReaderProcessMessageUnknownVersion(TArrayRef<const char> dataRef) = 0;
bool MessageRead(TArrayRef<const char> dataRef, TInstant now);
virtual void MessageSent(TArrayRef<TBusMessagePtrAndHeader> messages) = 0;
void CallSerialize(TBusMessage* msg, TBuffer& buffer) const;
void SerializeMessage(TBusMessage* msg, TBuffer* data, TMessageCounter* counter) const;
TBusMessage* DeserializeMessage(TArrayRef<const char> dataRef, const TBusHeader* header, TMessageCounter* messageCounter, EMessageStatus* status) const;
void ResetOneWayFlag(TArrayRef<TBusMessage*>);
inline ::NActor::TActor<TRemoteConnection, TWriterTag>* GetWriterActor() {
return this;
}
inline ::NActor::TActor<TRemoteConnection, TReaderTag>* GetReaderActor() {
return this;
}
inline TScheduleActor<TRemoteConnection, TWriterTag>* GetWriterSchedulerActor() {
return this;
}
void WriterErrorMessage(TNonDestroyingAutoPtr<TBusMessage> m, EMessageStatus status);
// takes ownership of ms
void WriterErrorMessages(const TArrayRef<TBusMessage*> ms, EMessageStatus status);
void FireClientConnectionEvent(TClientConnectionEvent::EType);
size_t GetInFlight();
size_t GetConnectSyscallsNumForTest();
bool IsReturnConnectFailedImmediately() {
return (bool)AtomicGet(ReturnConnectFailedImmediately);
}
bool IsAlive() const;
TRemoteSessionPtr Session;
TBusProtocol* const Proto;
TBusSessionConfig const Config;
bool RemovedFromSession;
const ui64 ConnectionId;
const TNetAddr PeerAddr;
const TBusSocketAddr PeerAddrSocketAddr;
const TInstant CreatedTime;
TInstant LastConnectAttempt;
TAtomic ReturnConnectFailedImmediately;
protected:
::NActor::TQueueForActor<TBusMessage*> BeforeSendQueue;
TLockFreeStack<TBusHeader> WrongVersionRequests;
struct TWriterData {
TAtomic Down;
NEventLoop::TChannelPtr Channel;
ui32 SocketVersion;
TRemoteConnectionWriterStatus Status;
TInstant StatusLastSendTime;
TLocalTasks TimeToRotateCounters;
TAtomic InFlight;
TTimedMessages SendQueue;
ui32 AwakeFlags;
EWriterState State;
TLeftRightBuffer Buffer;
TInstant CorkUntil;
TSystemEvent ShutdownComplete;
void SetChannel(NEventLoop::TChannelPtr channel);
void DropChannel();
TWriterData();
~TWriterData();
};
struct TReaderData {
TAtomic Down;
NEventLoop::TChannelPtr Channel;
ui32 SocketVersion;
TRemoteConnectionReaderStatus Status;
TInstant StatusLastSendTime;
TBuffer Buffer;
size_t Offset; /* offset in read buffer */
size_t MoreBytes; /* more bytes required from socket */
TVectorSwaps<TBusMessagePtrAndHeader> ReadMessages;
TSystemEvent ShutdownComplete;
bool BufferMore() const noexcept {
return MoreBytes > 0;
}
bool HasBytesInBuf(size_t bytes) noexcept;
void SetChannel(NEventLoop::TChannelPtr channel);
void DropChannel();
TReaderData();
~TReaderData();
};
// owned by session status actor
struct TGranStatus {
TGranStatus(TDuration gran)
: Writer(gran)
, Reader(gran)
{
}
TGranUp<TRemoteConnectionWriterStatus> Writer;
TGranUp<TRemoteConnectionReaderStatus> Reader;
};
TWriterData WriterData;
TReaderData ReaderData;
TGranStatus GranStatus;
TTokenQuota QuotaMsg;
TTokenQuota QuotaBytes;
size_t MaxBufferSize;
// client connection only
TLockFreeQueueBatch<TBusMessagePtrAndHeader, TVectorSwaps> ReplyQueue;
EMessageStatus ShutdownReason;
};
inline const TNetAddr& TRemoteConnection::GetAddr() const noexcept {
return PeerAddr;
}
typedef TIntrusivePtr<TRemoteConnection> TRemoteConnectionPtr;
}
}
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