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493 lines (440 loc) · 12.9 KB
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#include "sharedobject.h"
#include <time.h>
#include "md5.h"
static bool
s_send (zmq::socket_t & socket, const std::string & string) {
zmq::message_t message(string.size());
memcpy (message.data(), string.data(), string.size());
bool rc = socket.send (message);
return (rc);
}
static std::string
s_recv (zmq::socket_t & socket) {
zmq::message_t message;
socket.recv(&message);
return std::string(static_cast<char*>(message.data()), message.size());
}
typedef SharedObjectMsg SOMsg;
SharedObjectCli::SharedObjectCli(int id):
context_(1),
socket_req_(context_, zmq::socket_type::req),
socket_sub_(context_,zmq::socket_type::sub)
{
thread_process_subs_ = nullptr;
thread_process_subq_ = nullptr;
thread_process_reqq_ = nullptr;
id_ = id;
}
static long int time_stamp(){
return time(NULL);
}
int SharedObjectCli::set(const std::string &key, const std::string &val)
{
// set the key
ValueObject vo(val, so_.getVer(), id_, time_stamp());
SOMsg somsg;
somsg.msg_act_ = SOMsg::SET;
somsg.send_id_ = id_; // myself
somsg.recv_id_ = 0; // server
somsg.data_ = KVObject::toStr(key,vo);
queue_req.put(somsg);
return 0;
}
int SharedObjectCli::get(const std::string &key, std::string &val)
{
auto vo = so_.get(key);
val = vo.val_;
return 0;
}
int SharedObjectCli::on(const std::string &key, Fn fnc)
{
if(key.size()){
callbacks_[key] = fnc;
return 0;
}else{
return -1;
}
}
int SharedObjectCli::connect(std::string host, int port)
{
base_port_ = port;
server_host_ = host;
std::string id_str = "CLI"+std::to_string(id_);
socket_sub_.setsockopt(ZMQ_IDENTITY, id_str.c_str(), id_str.size());
socket_sub_.setsockopt(ZMQ_SUBSCRIBE, "", 0);
socket_sub_.connect(server_host_+":"+std::to_string(base_port_));
socket_req_.connect(server_host_+":"+std::to_string(base_port_+1));
printf("Sub is on %s\n", (server_host_+":"+std::to_string(base_port_)).c_str() );
printf("Req is on %s\n", (server_host_+":"+std::to_string(base_port_+1)).c_str() );
if(!thread_process_subs_){
thread_process_subs_ = new std::thread([this](){
this->process_subsocket();
});
}
printf("Start thread for subsocket receiving \n");
if(!thread_process_subq_){
thread_process_subq_ = new std::thread([this](){
this->process_subqueue();
});
}
printf("Start thread for sub queue processing \n");
if(!thread_process_reqq_){
thread_process_reqq_ = new std::thread([this](){
this->process_reqqueue();
});
}
printf("Start thread for req queue processing \n");
if(!thread_process_subs_ || ! thread_process_subs_->joinable() ){
printf("thread_process_subs_ faild!");
return -1;
}
if(!thread_process_subq_ ||! thread_process_subq_->joinable() ){
printf("thread_process_subq_ faild!");
return -1;
}
if(!thread_process_reqq_ ||! thread_process_reqq_->joinable() ){
printf("thread_process_reqq_ faild!");
return -1;
}
printf("connect successed! \n");
return 0;
}
int SharedObjectCli::sync()
{
SOMsg somsg;
somsg.msg_act_ = SOMsg::SYNC;
somsg.send_id_ = id_;
somsg.recv_id_ = 0; // server
somsg.ver_ = so_.getVer();
somsg.data_ = "";
// printf("Put somsg in queue:"); somsg.p();
queue_req.put(somsg);
return 0;
}
const std::string SharedObjectCli::hexmd5() const
{
return md5(so_.toStr());
}
void SharedObjectCli::print_info(const std::string fln) const
{
so_.p(fln);
}
void SharedObjectCli::process_subsocket()
{
try{
while(1){
std::string msg = s_recv(socket_sub_);
msg_count_++;
SharedObjectMsg somsg;
if(somsg.fromStr(msg) >= 0){
queue_sub.put(somsg);
}else{
printf("Incorrect message received from sub channel\n");
}
std::this_thread::sleep_for(std::chrono::milliseconds(10)); // sleep for a small ms
}
}catch(std::exception &e){
printf("Error on sub: %s\n", e.what());
}
}
void SharedObjectCli::process_subqueue()
{
try{
while(1){
SharedObjectMsg somsg = queue_sub.take();
// printf("Sub Queue Msg %d:%s\n", somsg.ver_, somsg.data_.c_str());
process_somsg(somsg);
}
}catch(std::exception &e){
printf("Error on sub: %s\n", e.what());
}
}
void SharedObjectCli::process_reqqueue()
{
try{
while(1){
SharedObjectMsg somsg = queue_req.take();
// printf("process somsg in queue:");somsg.p();
somsg.send_by(socket_req_);
std::string recv = s_recv(socket_req_);
process_somsg(recv);
}
}catch(std::exception &e){
printf("Error on req: %s\n", e.what());
}
}
int SharedObjectCli::process_somsg(const std::string &sostr)
{
SOMsg somsg;
int rc = somsg.fromStr(sostr);
if(rc <0){
return -1;
}
return process_somsg(somsg);
}
int SharedObjectCli::process_somsg(const SharedObjectMsg &somsg)
{
int rc = 0;
switch(somsg.msg_act_){
case SharedObjectMsg::SET_RESP:
rc = process_setresp(somsg);
break;
case SharedObjectMsg::SYNC_RESP:
rc = process_syncresp(somsg);
break;
case SharedObjectMsg::OUT_DATE:
break;
case SharedObjectMsg::ACK:
// ack, no need to do update
break;
}
return rc;
}
int SharedObjectCli::process_setresp(const SharedObjectMsg & somsg)
{
ValueObject vo;
std::string k;
KVObject::fromStr(somsg.data_, k, vo);
// somsg.p();
// printf("insert k-v: %s-%s\n",k.c_str(), vo.val_.c_str());
so_.set(k,vo);
// call the update callback
if(callbacks_.find(k) != callbacks_.end()){
callbacks_[k](vo.val_);
}else{
// printf("No callback for %s\n", k.c_str());
}
return 0;
}
int SharedObjectCli::process_syncresp(const SharedObjectMsg & somsg )
{
if( so_.init(somsg.data_) >=0){
printf("Initial from server\n");
// so_.p();
return 0;
} else{
printf("Incorrect sync-resp data\n");
return -1;
}
}
int SharedObjectCli::process_outdate(const SharedObjectMsg &somsg)
{
// outdate so get update from server
SOMsg msg;
msg.msg_act_ = SOMsg::flag_act::SYNC;
msg.send_id_ = id_;
msg.recv_id_ = 0; // means server
msg.ver_ = so_.getVer();
msg.data_ = "";
return -100;
}
typedef struct{
NUM flag_magic;
NUM send,recv;
NUM ver;
NUM flag_act;
NUM size;
NUM r1,r2; // reserved
} SOMsgHeader;
unsigned int SharedObjectMsg::size() const
{
return data_.size() + sizeof(SOMsgHeader);
}
const std::string SharedObjectMsg::toStr() const
{
// get the size and prepare the data buffer
int sz = size() ;
std::string out(sz,0);
char* pData = (char*) out.data();
// set the header
SOMsgHeader *pH = (SOMsgHeader*) pData;
pH->flag_magic = msg_magic_;
pH->flag_act = msg_act_;
pH->send = send_id_;
pH->recv = recv_id_;
pH->size = data_.size();
pH->ver = ver_;
pH->r1 = r1_;
pH->r2 = r2_;
// set the body
memcpy(pData+sizeof(SOMsgHeader), data_.data(), data_.size());
return out;
}
int SharedObjectMsg::fromStr(const std::string &data)
{
if(data.size() < sizeof(SOMsgHeader)){
printf("Incorrent SharedObjectMsg data 1\n");
return -1;
}
const char* pData = data.data();
SOMsgHeader &pH = * ( (SOMsgHeader*) pData );
if(pH.size + sizeof(SOMsgHeader) != data.size()){
printf("Incorrent SharedObjectMsg data 2\n");
return -2;
}
msg_magic_ = pH.flag_magic;
msg_act_ = pH.flag_act;
r1_ = pH.r1;
r2_ = pH.r2;
ver_ = pH.ver;
send_id_ = pH.send;
recv_id_ = pH.recv;
data_.resize(pH.size, 0);
memcpy((char*)data_.data(), pData + sizeof(SOMsgHeader), pH.size);
return 0;
}
int SharedObjectMsg::send_by(zmq::socket_t &socket)
{
if( s_send(socket,toStr()) ){
return 0;
}else{
// cannot send via socket
printf("SharedObjectMsg: Cannot send via socket\n");
return -1;
}
}
void SharedObjectMsg::p() const
{
printf("v%d s%d r%d m%d t%d r1%d r2%d: %s\n", ver_, send_id_, recv_id_, msg_magic_, msg_act_, r1_, r2_, data_.c_str());
}
SharedObjectSrv::SharedObjectSrv():
context(1),
socket_pub(context,ZMQ_PUB),
socket_resp(context,ZMQ_REP)
{
}
int SharedObjectSrv::bind(const std::string host, int port)
{
socket_pub.bind(host+":"+std::to_string(port));
socket_resp.bind(host+":"+std::to_string(port+1));
printf("pub on %s\n", (host+":"+std::to_string(port)).c_str());
printf("resp on %s\n", (host+":"+std::to_string(port+1)).c_str());
// start the thread
if(!thread_process_resps){
thread_process_resps = new std::thread([this]{
process_respsocket();
});
}
if(!thread_process_respq){
thread_process_respq = new std::thread([this]{
process_pubqueue();
});
}
return 0;
}
void SharedObjectSrv::process_testing()
{
int k = 0;
while( ++k ){
time_t t = time(NULL);
printf("Pub # %d Time is %d\n", k,t );
ValueObject vo("key is k"+std::to_string(k),10000+k,0, t);
std::string key = "k"+std::to_string(k);
so_.set(key, ValueObject("",10000+k,0, t));
SOMsg msg;
msg.send_id_ = 0;
msg.recv_id_ = ~0; // all
if(k%10 == 0){
msg.msg_act_ = SOMsg::SYNC_RESP;
msg.data_ = so_.toStr();
}else{
msg.msg_act_ = SOMsg::SET_RESP;
msg.data_ = KVObject::toStr(key, vo);
msg.r1_ = SOMsg::MSG_KV;
}
if(k%30==29){
k = 0;
}
msg.ver_ = 10000+k;
msg.p();
msg.send_by(socket_pub);
std::this_thread::sleep_for(std::chrono::seconds(1));
}
}
void SharedObjectSrv::process_pubqueue()
{
while(1){
try{
SharedObjectMsg somsg = queue_pub.take();
// printf("process somsg in queue:");somsg.p();
somsg.send_by(socket_pub);
}
catch(std::exception &e){
printf("Error on req: %s\n", e.what());
}
}
}
void SharedObjectSrv::process_respsocket()
{
while(1){
try{
std::string reqstr = s_recv(socket_resp);
//printf("Recv req msg:%d-%s\n",reqstr.size(), reqstr.c_str());
SOMsg somsg, resp_msg;
int rc = somsg.fromStr(reqstr);
if(rc >=0){
if(somsg.msg_act_ == SOMsg::SET){ // set the so
// update so_
ValueObject vo;
SO_STR key;
rc = KVObject::fromStr(somsg.data_, key,vo);
if(rc >=0){
// prepare msg response to requester
resp_msg.msg_act_ = SOMsg::ACK;
resp_msg.data_ = "";
resp_msg.ver_ = so_.getVer();
resp_msg.send_id_ = id_;
resp_msg.recv_id_ = somsg.send_id_;
resp_msg.send_by(socket_resp); // replay for
// setnpub(key,vo);
setnpub(key,vo); // tell all the client
}
}
if(somsg.msg_act_ == SOMsg::SYNC){ // do sync
printf("Sync:%d\t request from %d\n", sync_num_++, somsg.send_id_ );
// so_.p();
resp_msg.data_ = so_.toStr();
resp_msg.msg_act_ = SOMsg::SYNC_RESP;
resp_msg.ver_ = so_.getVer();
resp_msg.send_id_ = id_;
resp_msg.recv_id_ = somsg.send_id_;
resp_msg.send_by(socket_resp);
}
}
}catch(std::exception &e){
printf("process resp socket error: %s \n", e.what());
}
}
}
int SharedObjectSrv::setnpub(const std::string &key, ValueObject &vo)
{
// update so_
if(vo.ver_ >= so_.get(key).ver_){
// if the version is the same as server. do update
so_.setVer(so_.getVer()+1);
vo.ver_ = so_.getVer();
vo.time_ = time_stamp();
so_.set(key,vo);
}else{
// if the version is less than the server. check if the version is > key version
if(vo.ver_ >= so_.get(key).ver_){
so_.setVer(so_.getVer()+1);
vo.ver_ = so_.getVer();
vo.time_ = time_stamp();
so_.set(key,vo);
}else{
// it is out of data, no need to update this key val
return 1;
}
}
// pub the update
SOMsg pubmsg;
pubmsg.ver_ = so_.getVer();
pubmsg.send_id_ = id_;
pubmsg.recv_id_ = ~0;
pubmsg.msg_act_ = SOMsg::SET_RESP;
pubmsg.data_ = KVObject::toStr(key,vo);
//pubmsg.send_by(socket_pub);
queue_pub.put(pubmsg);
return 0;
}