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QEOpServerProxy.cc
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QEOpServerProxy.cc
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/*
* Copyright (c) 2013 Juniper Networks, Inc. All rights reserved.
*/
#include <tbb/mutex.h>
#include <boost/bind.hpp>
#include <boost/asio.hpp>
#include <boost/tuple/tuple.hpp>
#include "base/util.h"
#include "base/logging.h"
#include <tbb/atomic.h>
#include <cstdlib>
#include <cerrno>
#include <utility>
#include "hiredis/hiredis.h"
#include "hiredis/boostasio.hpp"
#include <list>
#include "../analytics/redis_connection.h"
#include "base/work_pipeline.h"
#include "QEOpServerProxy.h"
#include "rapidjson/document.h"
#include "rapidjson/stringbuffer.h"
#include "rapidjson/writer.h"
#include "query.h"
#include "analytics_types.h"
#include "stats_select.h"
#include <base/connection_info.h>
using std::list;
using std::string;
using std::vector;
using std::map;
using boost::assign::list_of;
using boost::ptr_map;
using boost::nullable;
using boost::tuple;
using boost::shared_ptr;
using boost::scoped_ptr;
using std::pair;
using std::auto_ptr;
using std::make_pair;
using process::ConnectionState;
using process::ConnectionType;
using process::ConnectionStatus;
extern RedisAsyncConnection * rac_alloc(EventManager *, const std::string & ,unsigned short,
RedisAsyncConnection::ClientConnectCbFn ,
RedisAsyncConnection::ClientDisconnectCbFn );
extern RedisAsyncConnection * rac_alloc_nocheck(EventManager *, const std::string & ,unsigned short,
RedisAsyncConnection::ClientConnectCbFn ,
RedisAsyncConnection::ClientDisconnectCbFn );
SandeshTraceBufferPtr QeTraceBuf(SandeshTraceBufferCreate(QE_TRACE_BUF, 10000));
typedef pair<QEOpServerProxy::QPerfInfo,
pair<shared_ptr<QEOpServerProxy::BufferT>,
shared_ptr<QEOpServerProxy::OutRowMultimapT> > > RawResultT;
typedef pair<redisReply,vector<string> > RedisT;
bool RedisAsyncArgCommand(RedisAsyncConnection * rac,
void *rpi, const vector<string>& args) {
return rac->RedisAsyncArgCmd(rpi, args);
}
class QEOpServerProxy::QEOpServerImpl {
public:
typedef std::vector<std::string> QEOutputT;
struct Input {
int cnum;
string hostname;
QueryEngine::QueryParams qp;
vector<uint64_t> chunk_size;
bool need_merge;
bool map_output;
string where;
string select;
string post;
uint64_t time_period;
string table;
uint32_t max_rows;
tbb::atomic<uint32_t> chunk_q;
tbb::atomic<uint32_t> total_rows;
};
void JsonInsert(std::vector<query_column> &columns,
rapidjson::Document& dd,
std::pair<const string,string> * map_it) {
bool found = false;
for (size_t j = 0; j < columns.size(); j++)
{
if ((0 == map_it->first.compare(0,5,string("COUNT")))) {
rapidjson::Value val(rapidjson::kNumberType);
unsigned long num = 0;
stringToInteger(map_it->second, num);
val.SetUint64(num);
dd.AddMember(map_it->first.c_str(), val, dd.GetAllocator());
found = true;
} else if (columns[j].name == map_it->first) {
if (map_it->second.length() == 0) {
rapidjson::Value val(rapidjson::kNullType);
dd.AddMember(map_it->first.c_str(), val, dd.GetAllocator());
found = true;
continue;
}
// find out type and convert
if (columns[j].datatype == "string" ||
columns[j].datatype == "uuid")
{
rapidjson::Value val(rapidjson::kStringType);
val.SetString(map_it->second.c_str());
dd.AddMember(map_it->first.c_str(), val, dd.GetAllocator());
} else if (columns[j].datatype == "ipv4") {
rapidjson::Value val(rapidjson::kStringType);
char str[INET_ADDRSTRLEN];
uint32_t ipaddr = 0;
stringToInteger(map_it->second, ipaddr);
ipaddr = htonl(ipaddr);
inet_ntop(AF_INET, &(ipaddr), str, INET_ADDRSTRLEN);
map_it->second = str;
val.SetString(map_it->second.c_str(), map_it->second.size());
dd.AddMember(map_it->first.c_str(), val, dd.GetAllocator());
} else if (columns[j].datatype == "double") {
rapidjson::Value val(rapidjson::kNumberType);
double dval = (double) strtod(map_it->second.c_str(), NULL);
val.SetDouble(dval);
dd.AddMember(map_it->first.c_str(), val, dd.GetAllocator());
} else {
rapidjson::Value val(rapidjson::kNumberType);
unsigned long num = 0;
stringToInteger(map_it->second, num);
val.SetUint64(num);
dd.AddMember(map_it->first.c_str(), val, dd.GetAllocator());
}
found = true;
}
}
assert(found);
}
void QueryJsonify(const string& table, bool map_output,
const BufferT* raw_res, const OutRowMultimapT* raw_mres, QEOutputT* raw_json) {
vector<OutRowT>::iterator res_it;
std::vector<query_column> columns;
if (!table.size()) return;
bool found = false;
for(size_t i = 0; i < g_viz_constants._TABLES.size(); i++)
{
if (g_viz_constants._TABLES[i].name == table) {
found = true;
columns = g_viz_constants._TABLES[i].schema.columns;
}
}
if (!found) {
if (g_viz_constants.OBJECT_VALUE_TABLE == table) {
found = true;
columns = g_viz_constants._OBJECT_TABLE_SCHEMA.columns;
}
}
if (!found) {
for (std::map<std::string, objtable_info>::const_iterator it =
g_viz_constants._OBJECT_TABLES.begin();
it != g_viz_constants._OBJECT_TABLES.end(); it++) {
if (it->first == table) {
found = true;
columns = g_viz_constants._OBJECT_TABLE_SCHEMA.columns;
}
}
}
assert(found || map_output);
if (map_output) {
OutRowMultimapT::const_iterator mres_it;
for (mres_it = raw_mres->begin(); mres_it != raw_mres->end(); ++mres_it) {
string jstr;
StatsSelect::Jsonify(mres_it->second.first, mres_it->second.second, jstr);
raw_json->push_back(jstr);
}
} else {
QEOpServerProxy::BufferT* raw_result =
const_cast<QEOpServerProxy::BufferT*>(raw_res);
QEOpServerProxy::BufferT::iterator res_it;
for (res_it = raw_result->begin(); res_it != raw_result->end(); ++res_it) {
std::map<std::string, std::string>::iterator map_it;
rapidjson::Document dd;
dd.SetObject();
for (map_it = (*res_it).first.begin();
map_it != (*res_it).first.end(); ++map_it) {
// search for column name in the schema
JsonInsert(columns, dd, &(*map_it));
}
rapidjson::StringBuffer sb;
rapidjson::Writer<rapidjson::StringBuffer> writer(sb);
dd.Accept(writer);
raw_json->push_back(sb.GetString());
}
}
}
void QECallback(void * qid, QPerfInfo qperf, auto_ptr<QEOpServerProxy::BufferT> res,
auto_ptr<QEOpServerProxy::OutRowMultimapT> mres) {
RawResultT* raw(new RawResultT);
raw->first = qperf;
raw->second.first = res;
raw->second.second = mres;
ExternalProcIf<RawResultT> * rpi = NULL;
if (qid)
rpi = reinterpret_cast<ExternalProcIf<RawResultT> *>(qid);
if (rpi) {
QE_LOG_NOQID(DEBUG, " Rx data from QE for " <<
rpi->Key());
auto_ptr<RawResultT> rp(raw);
rpi->Response(rp);
}
}
struct Stage0Out {
Input inp;
bool ret_code;
vector<QPerfInfo> ret_info;
vector<uint32_t> chunk_merge_time;
shared_ptr<BufferT> result;
shared_ptr<OutRowMultimapT> mresult;
};
ExternalBase::Efn QueryExec(uint32_t inst, const vector<RawResultT*> & exts,
const Input & inp, Stage0Out & res) {
uint32_t step = exts.size();
if (!step) {
res.inp = inp;
res.ret_code = true;
if (inp.map_output)
res.mresult = shared_ptr<OutRowMultimapT>(new OutRowMultimapT());
else
res.result = shared_ptr<BufferT>(new BufferT());
Input& cinp = const_cast<Input&>(inp);
uint32_t chunknum = cinp.chunk_q.fetch_and_increment();
if (chunknum < inp.chunk_size.size()) {
string key = "QUERY:" + res.inp.qp.qid;
// Update query status
RedisAsyncConnection * rac = conns_[res.inp.cnum].get();
string rkey = "REPLY:" + res.inp.qp.qid;
char stat[40];
uint prg = 10 + (chunknum * 75)/inp.chunk_size.size();
QE_LOG_NOQID(DEBUG, "QueryExec for inst " << inst <<
" step " << step << " PROGRESS " << prg);
sprintf(stat,"{\"progress\":%d}", prg);
RedisAsyncArgCommand(rac, NULL,
list_of(string("RPUSH"))(rkey)(stat));
return boost::bind(&QueryEngine::QueryExec, qosp_->qe_,
_1,
inp.qp,
chunknum);
} else {
return NULL;
}
}
res.ret_info.push_back(exts[step-1]->first);
if (exts[step-1]->first.error) {
res.ret_code =false;
}
uint32_t added_rows;
if (res.ret_code) {
if (inp.need_merge) {
uint64_t then = UTCTimestampUsec();
if (inp.map_output) {
uint32_t base_rows = res.mresult->size();
// TODO: This interface should not be Stats-Specific
StatsSelect::Merge(*(exts[step-1]->second.second), *(res.mresult));
// Some rows of this chunk will merge into existing results
added_rows = res.mresult->size() - base_rows;
} else {
uint32_t base_rows = res.result->size();
res.ret_code =
qosp_->qe_->QueryAccumulate(inp.qp,
*(exts[step-1]->second.first), *(res.result));
// Some rows of this chunk will merge into existing results
added_rows = res.result->size() - base_rows;
}
res.chunk_merge_time.push_back(
static_cast<uint32_t>((UTCTimestampUsec() - then)/1000));
} else {
// TODO : When merge is not needed, we can just send
// a result upto redis at this point.
if (inp.map_output) {
added_rows = exts[step-1]->second.second->size();
OutRowMultimapT::iterator jt = res.mresult->begin();
for (OutRowMultimapT::const_iterator it = exts[step-1]->second.second->begin();
it != exts[step-1]->second.second->end(); it++ ) {
jt = res.mresult->insert(jt,
std::make_pair(it->first, it->second));
}
} else {
added_rows = exts[step-1]->second.first->size();
res.result->insert(res.result->begin(),
exts[step-1]->second.first->begin(),
exts[step-1]->second.first->end());
}
}
Input& cinp = const_cast<Input&>(inp);
if (cinp.total_rows.fetch_and_add(added_rows) > cinp.max_rows) {
QE_LOG_NOQID(ERROR, "QueryExec Max Rows Exceeded " <<
cinp.total_rows << " chunk " << cinp.chunk_q);
return NULL;
}
uint32_t chunknum = cinp.chunk_q.fetch_and_increment();
if (chunknum < inp.chunk_size.size()) {
string key = "QUERY:" + res.inp.qp.qid;
// Update query status
RedisAsyncConnection * rac = conns_[res.inp.cnum].get();
string rkey = "REPLY:" + res.inp.qp.qid;
char stat[40];
uint prg = 10 + (chunknum * 75)/inp.chunk_size.size();
QE_LOG_NOQID(DEBUG, "QueryExec for inst " << inst <<
" step " << step << " PROGRESS " << prg);
sprintf(stat,"{\"progress\":%d}", prg);
RedisAsyncArgCommand(rac, NULL,
list_of(string("RPUSH"))(rkey)(stat));
return boost::bind(&QueryEngine::QueryExec, qosp_->qe_,
_1,
inp.qp,
chunknum);
} else {
return NULL;
}
}
return NULL;
}
struct Stage0Merge {
Input inp;
bool ret_code;
bool overflow;
uint32_t fm_time;
vector<vector<QPerfInfo> > ret_info;
vector<vector<uint32_t> > chunk_merge_time;
BufferT result;
OutRowMultimapT mresult;
};
bool QueryMerge(const std::vector<boost::shared_ptr<Stage0Out> > & subs,
const boost::shared_ptr<Input> & inp, Stage0Merge & res) {
res.ret_code = true;
res.overflow = false;
res.inp = subs[0]->inp;
res.fm_time = 0;
uint32_t total_rows = 0;
for (vector<shared_ptr<Stage0Out> >::const_iterator it = subs.begin() ;
it!=subs.end(); it++) {
if (res.inp.map_output)
total_rows += (*it)->mresult->size();
else
total_rows += (*it)->result->size();
}
// If max_rows have been exceeded, don't do any more processing
if (total_rows > res.inp.max_rows) {
res.overflow = true;
return true;
}
std::vector<boost::shared_ptr<OutRowMultimapT> > mqsubs;
std::vector<boost::shared_ptr<QEOpServerProxy::BufferT> > qsubs;
for (vector<shared_ptr<Stage0Out> >::const_iterator it = subs.begin() ;
it!=subs.end(); it++) {
res.ret_info.push_back((*it)->ret_info);
res.chunk_merge_time.push_back((*it)->chunk_merge_time);
if ((*it)->ret_code == false) {
res.ret_code = false;
} else {
if (res.inp.map_output)
mqsubs.push_back((*it)->mresult);
else
qsubs.push_back((*it)->result);
}
}
if (!res.ret_code) return true;
if (res.inp.need_merge) {
uint64_t then = UTCTimestampUsec();
if (res.inp.map_output) {
res.ret_code =
qosp_->qe_->QueryFinalMerge(res.inp.qp, mqsubs, res.mresult);
} else {
res.ret_code =
qosp_->qe_->QueryFinalMerge(res.inp.qp, qsubs, res.result);
}
uint64_t now = UTCTimestampUsec();
res.fm_time = static_cast<uint32_t>((now - then)/1000);
} else {
// TODO : If a merge was not needed, results have been sent to
// redis already. The only thing still needed is the status
for (vector<shared_ptr<Stage0Out> >::const_iterator it = subs.begin() ;
it!=subs.end(); it++) {
if (res.inp.map_output) {
OutRowMultimapT::iterator jt = res.mresult.begin();
for (OutRowMultimapT::const_iterator kt = (*it)->mresult->begin();
kt != (*it)->mresult->end(); kt++) {
jt = res.mresult.insert(jt,
std::make_pair(kt->first, kt->second));
}
} else {
res.result.insert(res.result.begin(),
(*it)->result->begin(),
(*it)->result->end());
}
}
}
return true;
}
struct Output {
Input inp;
uint32_t redis_time;
bool ret_code;
};
ExternalBase::Efn QueryResp(uint32_t inst, const vector<RedisT*> & exts,
const Stage0Merge & inp, Output & ret) {
uint32_t step = exts.size();
switch (inst) {
case 0: {
if (!step) {
ret.inp = inp.inp;
RedisAsyncConnection * rac = conns_[ret.inp.cnum].get();
std::stringstream keystr;
auto_ptr<QEOutputT> jsonresult(new QEOutputT);
QE_LOG_NOQID(INFO, "Will Jsonify #rows " <<
inp.result.size() + inp.mresult.size());
QueryJsonify(inp.inp.table, inp.inp.map_output,
&inp.result, &inp.mresult, jsonresult.get());
vector<string> const * const res = jsonresult.get();
vector<string>::size_type idx = 0;
uint32_t rownum = 0;
QE_LOG_NOQID(INFO, "Did Jsonify #rows " << res->size());
uint64_t then = UTCTimestampUsec();
char stat[80];
string key = "REPLY:" + ret.inp.qp.qid;
if (inp.overflow) {
sprintf(stat,"{\"progress\":%d}", - ENOBUFS);
} else if (!inp.ret_code) {
sprintf(stat,"{\"progress\":%d}", - EIO);
} else {
while (idx < res->size()) {
uint32_t rowsize = 0;
keystr.str(string());
keystr << "RESULT:" << ret.inp.qp.qid << ":" << rownum;
vector<string> command = list_of(string("RPUSH"))(keystr.str());
while ((idx < res->size()) && (((int)rowsize) < kMaxRowThreshold)) {
command.push_back(res->at(idx));
rowsize += res->at(idx).size();
idx++;
}
RedisAsyncArgCommand(rac, NULL, command);
RedisAsyncArgCommand(rac, NULL,
list_of(string("EXPIRE"))(keystr.str())("300"));
sprintf(stat,"{\"progress\":90, \"lines\":%d}",
(int)rownum);
RedisAsyncArgCommand(rac, NULL,
list_of(string("RPUSH"))(key)(stat));
rownum++;
}
sprintf(stat,"{\"progress\":100, \"lines\":%d, \"count\":%d}",
(int)rownum, (int)res->size());
}
uint64_t now = UTCTimestampUsec();
ret.redis_time = static_cast<uint32_t>((now - then)/1000);
QE_LOG_NOQID(DEBUG, "QE Query Result is " << stat);
return boost::bind(&RedisAsyncArgCommand,
conns_[ret.inp.cnum].get(), _1,
list_of(string("RPUSH"))(key)(stat));
} else {
RedisAsyncConnection * rac = conns_[ret.inp.cnum].get();
string key = "REPLY:" + ret.inp.qp.qid;
RedisAsyncArgCommand(rac, NULL,
list_of(string("EXPIRE"))(key)("300"));
key = "QUERY:" + ret.inp.qp.qid;
RedisAsyncArgCommand(rac, NULL,
list_of(string("EXPIRE"))(key)("300"));
uint64_t now = UTCTimestampUsec();
uint32_t qtime = static_cast<uint32_t>(
(now - ret.inp.qp.query_starttm)/1000);
QueryPerfInfo qpi;
qpi.set_name(Sandesh::source());
qpi.set_table(inp.inp.table);
uint64_t enqtm = atol(ret.inp.qp.terms["enqueue_time"].c_str());
uint32_t enq_delay = static_cast<uint32_t>(
(ret.inp.qp.query_starttm - enqtm)/1000);
qpi.set_enq_delay(enq_delay);
QueryStats qs;
size_t outsize;
if (ret.inp.map_output)
outsize = inp.mresult.size();
else
outsize = inp.result.size();
qs.set_rows(static_cast<uint32_t>(outsize));
qs.set_time(qtime);
qs.set_qid(ret.inp.qp.qid);
qs.set_chunks(inp.inp.chunk_size.size());
std::ostringstream wherestr, selstr, poststr;
for (size_t i=0; i < inp.ret_info.size(); i++) {
for (size_t j=0; j < inp.ret_info[i].size(); j++) {
wherestr << inp.ret_info[i][j].chunk_where_time << ",";
selstr << inp.ret_info[i][j].chunk_select_time << ",";
poststr << inp.ret_info[i][j].chunk_postproc_time << ",";
}
wherestr << " ";
selstr << " ";
poststr << " ";
}
if (inp.overflow) {
qs.set_error("ERROR-ENOBUFS");
} else if (!inp.ret_code) {
qs.set_error("ERROR-EIO");
} else {
qs.set_error("None");
}
qs.set_chunk_where_time(wherestr.str());
qs.set_chunk_select_time(selstr.str());
qs.set_chunk_postproc_time(poststr.str());
std::ostringstream mergestr;
for (size_t i=0; i < inp.chunk_merge_time.size(); i++) {
for (size_t j=0; j < inp.chunk_merge_time[i].size(); j++) {
mergestr << inp.chunk_merge_time[i][j] << ",";
}
mergestr << " ";
}
qs.set_chunk_merge_time(mergestr.str());
qs.set_final_merge_time(inp.fm_time);
qs.set_where(inp.inp.where);
qs.set_select(inp.inp.select);
qs.set_post(inp.inp.post);
qs.set_time_span(static_cast<uint32_t>(inp.inp.time_period));
std::vector<QueryStats> vqs;
vqs.push_back(qs);
qpi.set_query_stats(vqs);
QueryPerfInfoTrace::Send(qpi);
QueryObjectData qo;
qo.set_qid(ret.inp.qp.qid);
qo.set_table(inp.inp.table);
qo.set_ops_start_ts(enqtm);
qo.set_qed_start_ts(ret.inp.qp.query_starttm);
qo.set_qed_end_ts(now);
qo.set_flow_query_rows(static_cast<uint32_t>(outsize));
QUERY_OBJECT_SEND(qo);
//g_viz_constants.COLLECTOR_GLOBAL_TABLE
QE_LOG_NOQID(INFO, "Finished: QID " << ret.inp.qp.qid <<
" Table " << inp.inp.table <<
" Time(ms) " << qtime <<
" RedisTime(ms) " << ret.redis_time <<
" MergeTime(ms) " << inp.fm_time <<
" Rows " << outsize <<
" EnQ-delay" << enq_delay);
ret.ret_code = true;
}
}
break;
case 1: {
if (!step) {
string key = "ENGINE:" + inp.inp.hostname;
return boost::bind(&RedisAsyncArgCommand,
conns_[inp.inp.cnum].get(), _1,
list_of(string("LREM"))(key)("0")(inp.inp.qp.qid));
} else {
ret.ret_code = true;
}
}
break;
}
return NULL;
}
typedef WorkPipeline<Input, Stage0Merge, Output> QEPipeT;
void QEPipeCb(QEPipeT *wp, bool ret_code) {
tbb::mutex::scoped_lock lock(mutex_);
boost::shared_ptr<Output> res = wp->Result();
assert(pipes_.find(res->inp.qp.qid)->second == wp);
pipes_.erase(res->inp.qp.qid);
npipes_[res->inp.cnum-1]--;
QE_LOG_NOQID(DEBUG, " Result " << res->ret_code << " , " << res->inp.cnum << " conn");
delete wp;
}
void ConnUpPostProcess(uint8_t cnum) {
if (!connState_[cnum]) {
QE_LOG_NOQID(DEBUG, "ConnUp SetCB" << cnum);
cb_proc_fn_[cnum] = boost::bind(&QEOpServerImpl::CallbackProcess,
this, cnum, _1, _2, _3);
conns_[cnum].get()->SetClientAsyncCmdCb(cb_proc_fn_[cnum]);
connState_[cnum] = true;
}
bool isConnected = true;
for(int i=0; i<kConnections+1; i++)
if (!connState_[i]) isConnected = false;
if (isConnected) {
string key = "ENGINE:" + hostname_;
conns_[0].get()->RedisAsyncArgCmd(0,
list_of(string("BRPOPLPUSH"))("QUERYQ")(key)("0"));
}
}
int LeastLoadedConnection() {
int minvalue = npipes_[0];
int minindex = 0;
for (int i=1; i<kConnections; i++) {
if (npipes_[i] < minvalue) {
minvalue = npipes_[i];
minindex = i;
}
}
return minindex;
}
void QueryError(string qid, int ret_code) {
redisContext *c = redisConnect(redis_host_.c_str(), port_);
if (c->err) {
QE_LOG_NOQID(ERROR, "Cannot report query error for " << qid <<
" . No Redis Connection");
return;
}
//Authenticate the context with password
if (!redis_password_.empty()) {
redisReply * reply = (redisReply *) redisCommand(c, "AUTH %s",
redis_password_.c_str());
if (reply->type == REDIS_REPLY_ERROR) {
QE_LOG_NOQID(ERROR, "Authentication to redis error");
freeReplyObject(reply);
redisFree(c);
return;
}
freeReplyObject(reply);
}
char stat[80];
string key = "REPLY:" + qid;
sprintf(stat,"{\"progress\":%d}", - ret_code);
redisReply * reply = (redisReply *) redisCommand(c, "RPUSH %s %s",
key.c_str(), stat);
freeReplyObject(reply);
redisFree(c);
}
void StartPipeline(const string qid) {
QueryObjectData qo;
qo.set_qid(qid);
tbb::mutex::scoped_lock lock(mutex_);
redisContext *c = redisConnect(redis_host_.c_str(), port_);
if (c->err) {
QE_LOG_NOQID(ERROR, "Cannot start Pipleline for " << qid <<
" . No Redis Connection");
qo.set_error_string("No Redis Connection");
QUERY_OBJECT_SEND(qo);
return;
}
//Authenticate the context with password
if ( !redis_password_.empty()) {
redisReply * reply = (redisReply *) redisCommand(c, "AUTH %s",
redis_password_.c_str());
if (reply->type == REDIS_REPLY_ERROR) {
QE_LOG_NOQID(ERROR, "Authentication to redis error");
freeReplyObject(reply);
redisFree(c);
return;
}
freeReplyObject(reply);
}
string key = "QUERY:" + qid;
redisReply * reply = (redisReply *) redisCommand(c, "hgetall %s",
key.c_str());
map<string,string> terms;
if (!(c->err) && (reply->type == REDIS_REPLY_ARRAY)) {
for (uint32_t i=0; i<reply->elements; i+=2) {
string idx(reply->element[i]->str);
string val(reply->element[i+1]->str);
terms[idx] = val;
}
} else {
QE_LOG_NOQID(ERROR, "Cannot start Pipleline for " << qid <<
". Could not read query input");
freeReplyObject(reply);
redisFree(c);
QueryError(qid, 5);
qo.set_error_string("Cannot read query input");
QUERY_OBJECT_SEND(qo);
return;
}
freeReplyObject(reply);
redisFree(c);
QueryEngine::QueryParams qp(qid, terms, max_tasks_,
UTCTimestampUsec());
vector<uint64_t> chunk_size;
bool need_merge;
bool map_output;
string table;
string where;
string select;
string post;
uint64_t time_period;
int ret = qosp_->qe_->QueryPrepare(qp, chunk_size, need_merge, map_output,
where, select, post, time_period, table);
if (ret!=0) {
QueryError(qid, ret);
QE_LOG_NOQID(ERROR, "Cannot start Pipleline for " << qid <<
". Query Parsing Error " << ret);
qo.set_error_string("Query parse error");
QUERY_OBJECT_SEND(qo);
return;
} else {
QE_LOG_NOQID(INFO, "Chunks: " << chunk_size.size() <<
" Need Merge: " << need_merge);
}
if (pipes_.size() >= 32) {
QueryError(qid, EMFILE);
QE_LOG_NOQID(ERROR, "Cannot start Pipleline for " << qid <<
". Too many queries : " << pipes_.size());
qo.set_error_string("Too many parallel queries");
QUERY_OBJECT_SEND(qo);
return;
}
shared_ptr<Input> inp(new Input());
inp.get()->hostname = hostname_;
inp.get()->qp = qp;
inp.get()->map_output = map_output;
inp.get()->need_merge = need_merge;
inp.get()->chunk_size = chunk_size;
inp.get()->where = where;
inp.get()->select = select;
inp.get()->post = post;
inp.get()->time_period = time_period;
inp.get()->table = table;
inp.get()->chunk_q = 0;
inp.get()->total_rows = 0;
inp.get()->max_rows = max_rows_;
vector<pair<int,int> > tinfo;
for (uint idx=0; idx<(uint)max_tasks_; idx++) {
tinfo.push_back(make_pair(0, -1));
}
QEPipeT * wp = new QEPipeT(
new WorkStage<Input, Stage0Merge,
RawResultT, Stage0Out>(
tinfo,
boost::bind(&QEOpServerImpl::QueryExec, this, _1,_2,_3,_4),
boost::bind(&QEOpServerImpl::QueryMerge, this, _1,_2,_3)),
new WorkStage<Stage0Merge, Output,
RedisT>(
list_of(make_pair(0,-1))(make_pair(0,-1)),
boost::bind(&QEOpServerImpl::QueryResp, this, _1,_2,_3,_4)));
pipes_.insert(make_pair(qid, wp));
int conn = LeastLoadedConnection();
npipes_[conn]++;
// The cnum with index 0 is only used for receiving new queries
inp.get()->cnum = conn+1;
wp->Start(boost::bind(&QEOpServerImpl::QEPipeCb, this, wp, _1), inp);
QE_LOG_NOQID(DEBUG, "Starting Pipeline for " << qid << " , " << conn+1 <<
" conn, " << tinfo.size() << " tasks");
// Update query status
RedisAsyncConnection * rac = conns_[inp.get()->cnum].get();
string rkey = "REPLY:" + qid;
char stat[40];
sprintf(stat,"{\"progress\":15}");
RedisAsyncArgCommand(rac, NULL,
list_of(string("RPUSH"))(rkey)(stat));
}
void ConnUpPrePostProcess(uint8_t cnum) {
//Assign callback for AUTH command
cb_proc_fn_[cnum] = boost::bind(&QEOpServerImpl::ConnectCallbackProcess,
this, cnum, _1, _2, _3);
conns_[cnum].get()->SetClientAsyncCmdCb(cb_proc_fn_[cnum]);
//Send AUTH command
RedisAsyncConnection * rac = conns_[cnum].get();
if (!redis_password_.empty()) {
RedisAsyncArgCommand(rac, NULL,
list_of(string("AUTH"))(redis_password_.c_str()));
} else {
RedisAsyncArgCommand(rac, NULL,
list_of(string("PING")));
}
}
void ConnUp(uint8_t cnum) {
std::ostringstream ostr;
ostr << "ConnUp.. UP " << cnum;
QE_LOG_NOQID(DEBUG, ostr.str());
qosp_->evm_->io_service()->post(
boost::bind(&QEOpServerImpl::ConnUpPrePostProcess,
this, cnum));
}
void ConnDown(uint8_t cnum) {
QE_LOG_NOQID(DEBUG, "ConnDown.. DOWN.. Reconnect.." << cnum);
connState_[cnum] = false;
ConnectionState::GetInstance()->Update(ConnectionType::REDIS,
"Query", ConnectionStatus::DOWN, conns_[cnum]->Endpoint(),
std::string());
qosp_->evm_->io_service()->post(boost::bind(&RedisAsyncConnection::RAC_Connect,
conns_[cnum].get()));
}
void ConnectCallbackProcess(uint8_t cnum, const redisAsyncContext *c, void *r, void *privdata) {
if (r == NULL) {
QE_LOG_NOQID(DEBUG, "In ConnectCallbackProcess.. NULL Reply");
return;
}
redisReply reply = *reinterpret_cast<redisReply*>(r);
if (reply.type != REDIS_REPLY_ERROR) {
QE_LOG_NOQID(DEBUG, "In ConnectCallbackProcess..");
ConnectionState::GetInstance()->Update(ConnectionType::REDIS,
"Query", ConnectionStatus::UP, conns_[cnum]->Endpoint(),
std::string());
qosp_->evm_->io_service()->post(
boost::bind(&QEOpServerImpl::ConnUpPostProcess,
this, cnum));
} else {
QE_LOG_NOQID(ERROR,"In connectCallbackProcess.. Error");
QE_ASSERT(reply.type != REDIS_REPLY_ERROR);
}
}
void CallbackProcess(uint8_t cnum, const redisAsyncContext *c, void *r, void *privdata) {
//QE_TRACE_NOQID(DEBUG, "Redis CB" << cnum);
if (0 == cnum) {
if (r == NULL) {
QE_LOG_NOQID(DEBUG, __func__ << ": received NULL reply from redis");
return;
}
redisReply reply = *reinterpret_cast<redisReply*>(r);
QE_ASSERT(reply.type == REDIS_REPLY_STRING);
string qid(reply.str);
StartPipeline(qid);
qosp_->evm_->io_service()->post(
boost::bind(&QEOpServerImpl::ConnUpPostProcess,
this, cnum));
return;
}
auto_ptr<RedisT> fullReply;
vector<string> elements;
if (r == NULL) {
//QE_TRACE_NOQID(DEBUG, "NULL Reply...\n");
} else {
redisReply reply = *reinterpret_cast<redisReply*>(r);
fullReply.reset(new RedisT);
fullReply.get()->first = reply;
if (reply.type == REDIS_REPLY_ARRAY) {
for (uint32_t i=0; i<reply.elements; i++) {
string element(reply.element[i]->str);
fullReply.get()->second.push_back(element);
}
} else if (reply.type == REDIS_REPLY_STRING) {
fullReply.get()->second.push_back(string(reply.str));
}
}
if (!privdata) {
//QE_TRACE_NOQID(DEBUG, "Ignoring redis reply");
return;
}
ExternalProcIf<RedisT> * rpi =
reinterpret_cast<ExternalProcIf<RedisT> *>(privdata);
QE_TRACE_NOQID(DEBUG, " Rx data from REDIS for " << rpi->Key());
rpi->Response(fullReply);
}
QEOpServerImpl(const string & redis_host, uint16_t port,
const string & redis_password, QEOpServerProxy * qosp,
int max_tasks, int max_rows) :
hostname_(boost::asio::ip::host_name()),
redis_host_(redis_host),
port_(port),
redis_password_(redis_password),
qosp_(qosp),
max_tasks_(max_tasks),
max_rows_(max_rows) {
for (int i=0; i<kConnections+1; i++) {
cb_proc_fn_[i] = boost::bind(&QEOpServerImpl::CallbackProcess,
this, i, _1, _2, _3);
connState_[i] = false;
if (i)
conns_[i].reset(rac_alloc(qosp->evm_, redis_host_, port,
boost::bind(&QEOpServerImpl::ConnUp, this, i),
boost::bind(&QEOpServerImpl::ConnDown, this, i)));
else
conns_[i].reset(rac_alloc_nocheck(qosp->evm_, redis_host_, port,
boost::bind(&QEOpServerImpl::ConnUp, this, i),
boost::bind(&QEOpServerImpl::ConnDown, this, i)));
// The cnum with index 0 is only used for receiving new queries
// It does not host any pipelines
if (i) npipes_[i-1] = 0;
}
}
~QEOpServerImpl() {
}
private:
static const int kMaxRowThreshold = 10000;
// We always have one connection to receive new queries from OpServer
// This is the number of addition connections, which will be
// used to read query parameters and write query results
static const uint8_t kConnections = 4;
const string hostname_;
const string redis_host_;
const unsigned short port_;
const string redis_password_;
QEOpServerProxy * const qosp_;
boost::shared_ptr<RedisAsyncConnection> conns_[kConnections+1];