string HTWorker::compare_swap_internal(const ZPack &zpack) { string ret; /*get Package stored by lookup*/ string lresult = lookup_shared(zpack); ZPack lzpack; lresult = erase_status_code(lresult); lzpack.ParseFromString(lresult); /*get seen_value passed in*/ string seen_value_passed_in = zpack.val(); /*get seen_value stored*/ string seen_value_stored = lzpack.val(); /* printf("{%s}:{%s,%s}\n", zpack.key().c_str(), zpack.val().c_str(), zpack.newval().c_str());*/ /*they are equivalent, compare and swap*/ if (!seen_value_passed_in.compare(seen_value_stored)) { lzpack.set_val(zpack.newval()); return insert_shared(lzpack); } else { return Const::ZSC_REC_SRVEXP; } }
string ZHTClient::commonOpInternal(const string &opcode, const string &key, const string &val, const string &val2, string &result, int lease) { ZPack zpack; zpack.set_opcode(opcode); //"001": lookup, "002": remove, "003": insert, "004": append, "005", compare_swap zpack.set_replicanum(3); if (key.empty()) return Const::ZSC_REC_EMPTYKEY; //-1, empty key not allowed. else zpack.set_key(key); if (val.empty()) { zpack.set_val("^"); //coup, to fix ridiculous bug of protobuf! //to debug zpack.set_valnull(true); } else { zpack.set_val(val); zpack.set_valnull(false); } if (val2.empty()) { zpack.set_newval("?"); //coup, to fix ridiculous bug of protobuf! //to debug zpack.set_newvalnull(true); } else { zpack.set_newval(val2); zpack.set_newvalnull(false); } zpack.set_lease(Const::toString(lease)); string msg = zpack.SerializeAsString(); /*ZPack tmp; tmp.ParseFromString(msg); printf("{%s}:{%s,%s}\n", tmp.key().c_str(), tmp.val().c_str(), tmp.newval().c_str());*/ char *buf = (char*) calloc(_msg_maxsize, sizeof(char)); size_t msz = _msg_maxsize; /*send to and receive from*/ _proxy->sendrecv(msg.c_str(), msg.size(), buf, msz); /*...parse status and result*/ string sstatus; string srecv(buf); if (srecv.empty()) { sstatus = Const::ZSC_REC_SRVEXP; } else { result = srecv.substr(3); //the left, if any, is lookup result or second-try zpack sstatus = srecv.substr(0, 3); //status returned, the first three chars, like 001, -98... } free(buf); return sstatus; }
string ZHTClient::commonOpInternal(const string &opcode, const string &key, const string &val, const string &val2, string &result, int lease) { ZPack zpack; zpack.set_opcode(opcode); //"001": lookup, "002": remove, "003": insert, "004": append, "005", compare_swap zpack.set_replicanum(3); //cout<<"Op Code"<<opcode<<"Key"<<key<<endl; if (key.empty()) return Const::ZSC_REC_EMPTYKEY; //-1, empty key not allowed. else zpack.set_key(key); if (val.empty()) { zpack.set_val("^"); //coup, to fix ridiculous bug of protobuf! //to debug zpack.set_valnull(true); } else { zpack.set_val(val); zpack.set_valnull(false); } if (val2.empty()) { zpack.set_newval("?"); //coup, to fix ridiculous bug of protobuf! //to debug zpack.set_newvalnull(true); } else { zpack.set_newval(val2); zpack.set_newvalnull(false); } zpack.set_lease(Const::toString(lease)); //cout<<"lease "<<lease<<endl; string msg = zpack.SerializeAsString(); //cout<<msg<<endl; /*ZPack tmp; tmp.ParseFromString(msg); printf("{%s}:{%s,%s}\n", tmp.key().c_str(), tmp.val().c_str(), tmp.newval().c_str());*/ /* char *buf = (char*) calloc(_msg_maxsize, sizeof(char)); size_t msz = _msg_maxsize; */ /*send to and receive from*/ // this is old making large msg problem //_proxy->sendrecv(msg.c_str(), msg.size(), buf, msz); TCPProxy tcp; ZHTUtil zu; HostEntity he = zu.getHostEntityByKey(msg); int sock = tcp.getSockCached(he.host, he.port); tcp.sendTo(sock, (void*) msg.c_str(), msg.size()); string res; int recvcount = loopedrecv(sock, NULL, res); /*...parse status and result*/ string sstatus; // srecv is no longer used due to a large msg fix. now instead of sendrecv, //we are using sendto and loopedrecv methods /* string srecv(buf); cout<<"res value is "<<res<<endl; if (srecv.empty()) { cout<<"empty"<<endl; sstatus = Const::ZSC_REC_SRVEXP; } else { result = srecv.substr(3); //the left, if any, is lookup result or second-try zpack //cout<<"srecv string size="<<srecv.size()<<endl; if (srecv.size() == 36) { sstatus = srecv.substr(0, 36); //sstatus=Const::ZSC_REC_REMOVEMETADATAQUEUE; } else { sstatus = srecv.substr(0, 3); //status returned, the first three chars, like 001, -98... } } */ //cout<<"res value is "<<res<<endl; if (res.empty()) { //cout<<"empty"<<endl; sstatus = Const::ZSC_REC_SRVEXP; } else { result = res.substr(3); //the left, if any, is lookup result or second-try zpack //cout<<"srecv string size="<<srecv.size()<<endl; if (res.size() == 36) { sstatus = res.substr(0, 36); //sstatus=Const::ZSC_REC_REMOVEMETADATAQUEUE; } else { sstatus = res.substr(0, 3); //status returned, the first three chars, like 001, -98... } } // free(buf); return sstatus; }