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953c4a75c8
FairMQ/fairmq/zeromq/Socket.h
Alexey Rybalchenko 953c4a75c8 refactor: deduplicate more zmq/shmem code
2021-12-06 09:45:39 +01:00

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/********************************************************************************
* Copyright (C) 2014-2021 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH *
* *
* This software is distributed under the terms of the *
* GNU Lesser General Public Licence (LGPL) version 3, *
* copied verbatim in the file "LICENSE" *
********************************************************************************/
#ifndef FAIR_MQ_ZMQ_SOCKET_H
#define FAIR_MQ_ZMQ_SOCKET_H
#include <FairMQLogger.h>
#include <FairMQMessage.h>
#include <FairMQSocket.h>
#include <fairmq/tools/Strings.h>
#include <fairmq/zeromq/Common.h>
#include <fairmq/zeromq/Context.h>
#include <fairmq/zeromq/Message.h>
#include <zmq.h>
#include <atomic>
#include <functional>
#include <memory> // unique_ptr, make_unique
#include <string_view>
namespace fair::mq::zmq
{
class Socket final : public fair::mq::Socket
{
public:
Socket(Context& ctx, const std::string& type, const std::string& name, const std::string& id, FairMQTransportFactory* factory = nullptr)
: fair::mq::Socket(factory)
, fCtx(ctx)
, fId(id + "." + name + "." + type)
, fSocket(zmq_socket(fCtx.GetZmqCtx(), getConstant(type)))
, fMonitorSocket(makeMonitorSocket(fCtx.GetZmqCtx(), fSocket, fId))
, fBytesTx(0)
, fBytesRx(0)
, fMessagesTx(0)
, fMessagesRx(0)
, fTimeout(100)
, fConnectedPeersCount(0)
{
if (fSocket == nullptr) {
LOG(error) << "Failed creating socket " << fId << ", reason: " << zmq_strerror(errno);
throw SocketError(tools::ToString("Unavailable transport requested: ", type));
}
if (zmq_setsockopt(fSocket, ZMQ_IDENTITY, fId.c_str(), fId.length()) != 0) {
LOG(error) << "Failed setting ZMQ_IDENTITY socket option, reason: " << zmq_strerror(errno);
}
// Tell socket to try and send/receive outstanding messages for <linger> milliseconds before
// terminating. Default value for ZeroMQ is -1, which is to wait forever.
int linger = 1000;
if (zmq_setsockopt(fSocket, ZMQ_LINGER, &linger, sizeof(linger)) != 0) {
LOG(error) << "Failed setting ZMQ_LINGER socket option, reason: " << zmq_strerror(errno);
}
if (zmq_setsockopt(fSocket, ZMQ_SNDTIMEO, &fTimeout, sizeof(fTimeout)) != 0) {
LOG(error) << "Failed setting ZMQ_SNDTIMEO socket option, reason: " << zmq_strerror(errno);
}
if (zmq_setsockopt(fSocket, ZMQ_RCVTIMEO, &fTimeout, sizeof(fTimeout)) != 0) {
LOG(error) << "Failed setting ZMQ_RCVTIMEO socket option, reason: " << zmq_strerror(errno);
}
if (type == "sub") {
if (zmq_setsockopt(fSocket, ZMQ_SUBSCRIBE, nullptr, 0) != 0) {
LOG(error) << "Failed setting ZMQ_SUBSCRIBE socket option, reason: " << zmq_strerror(errno);
}
}
LOG(debug) << "Created socket " << GetId();
}
Socket(const Socket&) = delete;
Socket(Socket&&) = delete;
Socket& operator=(const Socket&) = delete;
Socket& operator=(Socket&&) = delete;
std::string GetId() const override { return fId; }
bool Bind(const std::string& address) override
{
return zmq::Bind(fSocket, address, fId);
}
bool Connect(const std::string& address) override
{
return zmq::Connect(fSocket, address, fId);
}
int64_t Send(MessagePtr& msg, int timeout = -1) override
{
int flags = 0;
if (timeout == 0) {
flags = ZMQ_DONTWAIT;
}
int elapsed = 0;
int64_t actualBytes = zmq_msg_size(static_cast<Message*>(msg.get())->GetMessage());
while (true) {
int nbytes = zmq_msg_send(static_cast<Message*>(msg.get())->GetMessage(), fSocket, flags);
if (nbytes >= 0) {
fBytesTx += actualBytes;
++fMessagesTx;
return actualBytes;
} else if (zmq_errno() == EAGAIN || zmq_errno() == EINTR) {
if (fCtx.Interrupted()) {
return static_cast<int>(TransferCode::interrupted);
} else if (zmq::ShouldRetry(flags, fTimeout, timeout, elapsed)) {
continue;
} else {
return static_cast<int>(TransferCode::timeout);
}
} else {
return zmq::HandleErrors(fId);
}
}
}
int64_t Receive(MessagePtr& msg, int timeout = -1) override
{
int flags = 0;
if (timeout == 0) {
flags = ZMQ_DONTWAIT;
}
int elapsed = 0;
while (true) {
int nbytes = zmq_msg_recv(static_cast<Message*>(msg.get())->GetMessage(), fSocket, flags);
if (nbytes >= 0) {
static_cast<Message*>(msg.get())->Realign();
int64_t actualBytes = zmq_msg_size(static_cast<Message*>(msg.get())->GetMessage());
fBytesRx += actualBytes;
++fMessagesRx;
return actualBytes;
} else if (zmq_errno() == EAGAIN || zmq_errno() == EINTR) {
if (fCtx.Interrupted()) {
return static_cast<int>(TransferCode::interrupted);
} else if (zmq::ShouldRetry(flags, fTimeout, timeout, elapsed)) {
continue;
} else {
return static_cast<int>(TransferCode::timeout);
}
} else {
return zmq::HandleErrors(fId);
}
}
}
int64_t Send(std::vector<std::unique_ptr<fair::mq::Message>>& msgVec, int timeout = -1) override
{
int flags = 0;
if (timeout == 0) {
flags = ZMQ_DONTWAIT;
}
const unsigned int vecSize = msgVec.size();
// Sending vector typicaly handles more then one part
if (vecSize > 1) {
int elapsed = 0;
while (true) {
int64_t totalSize = 0;
bool repeat = false;
for (unsigned int i = 0; i < vecSize; ++i) {
int nbytes = zmq_msg_send(static_cast<Message*>(msgVec[i].get())->GetMessage(), fSocket, (i < vecSize - 1) ? ZMQ_SNDMORE | flags : flags);
if (nbytes >= 0) {
totalSize += nbytes;
} else if (zmq_errno() == EAGAIN || zmq_errno() == EINTR) {
if (fCtx.Interrupted()) {
return static_cast<int>(TransferCode::interrupted);
} else if (zmq::ShouldRetry(flags, fTimeout, timeout, elapsed)) {
repeat = true;
break;
} else {
return static_cast<int>(TransferCode::timeout);
}
} else {
return zmq::HandleErrors(fId);
}
}
if (repeat) {
continue;
}
// store statistics on how many messages have been sent (handle all parts as a single message)
++fMessagesTx;
fBytesTx += totalSize;
return totalSize;
}
} else if (vecSize == 1) { // If there's only one part, send it as a regular message
return Send(msgVec.back(), timeout);
} else { // if the vector is empty, something might be wrong
LOG(warn) << "Will not send empty vector";
return static_cast<int>(TransferCode::error);
}
}
int64_t Receive(std::vector<std::unique_ptr<fair::mq::Message>>& msgVec, int timeout = -1) override
{
int flags = 0;
if (timeout == 0) {
flags = ZMQ_DONTWAIT;
}
int elapsed = 0;
while (true) {
int64_t totalSize = 0;
int more = 0;
bool repeat = false;
do {
FairMQMessagePtr part = std::make_unique<Message>(GetTransport());
int nbytes = zmq_msg_recv(static_cast<Message*>(part.get())->GetMessage(), fSocket, flags);
if (nbytes >= 0) {
static_cast<Message*>(part.get())->Realign();
msgVec.push_back(move(part));
totalSize += nbytes;
} else if (zmq_errno() == EAGAIN || zmq_errno() == EINTR) {
if (fCtx.Interrupted()) {
return static_cast<int>(TransferCode::interrupted);
} else if (zmq::ShouldRetry(flags, fTimeout, timeout, elapsed)) {
repeat = true;
break;
} else {
return static_cast<int>(TransferCode::timeout);
}
} else {
return zmq::HandleErrors(fId);
}
size_t moreSize = sizeof(more);
zmq_getsockopt(fSocket, ZMQ_RCVMORE, &more, &moreSize);
} while (more);
if (repeat) {
continue;
}
// store statistics on how many messages have been received (handle all parts as a single message)
++fMessagesRx;
fBytesRx += totalSize;
return totalSize;
}
}
void* GetSocket() const { return fSocket; }
void Close() override
{
// LOG(debug) << "Closing socket " << fId;
if (fSocket && zmq_close(fSocket) != 0) {
LOG(error) << "Failed closing data socket " << fId
<< ", reason: " << zmq_strerror(errno);
}
fSocket = nullptr;
if (fMonitorSocket && zmq_close(fMonitorSocket) != 0) {
LOG(error) << "Failed closing monitor socket " << fId
<< ", reason: " << zmq_strerror(errno);
}
fMonitorSocket = nullptr;
}
void SetOption(const std::string& option, const void* value, size_t valueSize) override
{
if (zmq_setsockopt(fSocket, getConstant(option), value, valueSize) < 0) {
LOG(error) << "Failed setting socket option, reason: " << zmq_strerror(errno);
}
}
void GetOption(const std::string& option, void* value, size_t* valueSize) override
{
if (zmq_getsockopt(fSocket, getConstant(option), value, valueSize) < 0) {
LOG(error) << "Failed getting socket option, reason: " << zmq_strerror(errno);
}
}
int Events(uint32_t* events) override
{
size_t eventsSize = sizeof(uint32_t);
return zmq_getsockopt(fSocket, ZMQ_EVENTS, events, &eventsSize);
}
void SetLinger(int value) override
{
if (zmq_setsockopt(fSocket, ZMQ_LINGER, &value, sizeof(value)) < 0) {
throw SocketError(tools::ToString("failed setting ZMQ_LINGER, reason: ", zmq_strerror(errno)));
}
}
int GetLinger() const override
{
int value = 0;
size_t valueSize = sizeof(value);
if (zmq_getsockopt(fSocket, ZMQ_LINGER, &value, &valueSize) < 0) {
throw SocketError(tools::ToString("failed getting ZMQ_LINGER, reason: ", zmq_strerror(errno)));
}
return value;
}
void SetSndBufSize(int value) override
{
if (zmq_setsockopt(fSocket, ZMQ_SNDHWM, &value, sizeof(value)) < 0) {
throw SocketError(tools::ToString("failed setting ZMQ_SNDHWM, reason: ", zmq_strerror(errno)));
}
}
int GetSndBufSize() const override
{
int value = 0;
size_t valueSize = sizeof(value);
if (zmq_getsockopt(fSocket, ZMQ_SNDHWM, &value, &valueSize) < 0) {
throw SocketError(tools::ToString("failed getting ZMQ_SNDHWM, reason: ", zmq_strerror(errno)));
}
return value;
}
void SetRcvBufSize(int value) override
{
if (zmq_setsockopt(fSocket, ZMQ_RCVHWM, &value, sizeof(value)) < 0) {
throw SocketError(tools::ToString("failed setting ZMQ_RCVHWM, reason: ", zmq_strerror(errno)));
}
}
int GetRcvBufSize() const override
{
int value = 0;
size_t valueSize = sizeof(value);
if (zmq_getsockopt(fSocket, ZMQ_RCVHWM, &value, &valueSize) < 0) {
throw SocketError(tools::ToString("failed getting ZMQ_RCVHWM, reason: ", zmq_strerror(errno)));
}
return value;
}
void SetSndKernelSize(int value) override
{
if (zmq_setsockopt(fSocket, ZMQ_SNDBUF, &value, sizeof(value)) < 0) {
throw SocketError(tools::ToString("failed getting ZMQ_SNDBUF, reason: ", zmq_strerror(errno)));
}
}
int GetSndKernelSize() const override
{
int value = 0;
size_t valueSize = sizeof(value);
if (zmq_getsockopt(fSocket, ZMQ_SNDBUF, &value, &valueSize) < 0) {
throw SocketError(tools::ToString("failed getting ZMQ_SNDBUF, reason: ", zmq_strerror(errno)));
}
return value;
}
void SetRcvKernelSize(int value) override
{
if (zmq_setsockopt(fSocket, ZMQ_RCVBUF, &value, sizeof(value)) < 0) {
throw SocketError(tools::ToString("failed getting ZMQ_RCVBUF, reason: ", zmq_strerror(errno)));
}
}
int GetRcvKernelSize() const override
{
int value = 0;
size_t valueSize = sizeof(value);
if (zmq_getsockopt(fSocket, ZMQ_RCVBUF, &value, &valueSize) < 0) {
throw SocketError(tools::ToString("failed getting ZMQ_RCVBUF, reason: ", zmq_strerror(errno)));
}
return value;
}
unsigned long GetNumberOfConnectedPeers() const override
{
fConnectedPeersCount = updateNumberOfConnectedPeers(fConnectedPeersCount, fMonitorSocket);
return fConnectedPeersCount;
}
unsigned long GetBytesTx() const override { return fBytesTx; }
unsigned long GetBytesRx() const override { return fBytesRx; }
unsigned long GetMessagesTx() const override { return fMessagesTx; }
unsigned long GetMessagesRx() const override { return fMessagesRx; }
[[deprecated("Use fair::mq::zmq::getConstant() from <fairmq/zeromq/Common.h> instead.")]]
static int GetConstant(const std::string& constant) { return getConstant(constant); }
~Socket() override { Close(); }
private:
Context& fCtx;
std::string fId;
void* fSocket;
void* fMonitorSocket;
std::atomic<unsigned long> fBytesTx;
std::atomic<unsigned long> fBytesRx;
std::atomic<unsigned long> fMessagesTx;
std::atomic<unsigned long> fMessagesRx;
int fTimeout;
mutable unsigned long fConnectedPeersCount;
};
} // namespace fair::mq::zmq
#endif /* FAIR_MQ_ZMQ_SOCKET_H */
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