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#include "external_scorer.h"
#include <cstdio> // popen
#include <cstdlib>
#include <cstring>
#include <unistd.h>
#include <signal.h>
#include <sstream>
#include <iostream>
#include <cassert>
#include "stringlib.h"
#include "filelib.h"
#include "tdict.h"
using namespace std;
extern const char* meteor_jar_path;
extern void metric_child_signal_handler(int);
map<string, boost::shared_ptr<ScoreServer> > ScoreServerManager::servers_;
class METEORServer : public ScoreServer {
public:
METEORServer(const string& cmd) : ScoreServer(cmd) {}
};
ScoreServer* ScoreServerManager::Instance(const string& score_type) {
boost::shared_ptr<ScoreServer>& s = servers_[score_type];
if (!s) {
if (score_type == "meteor") {
#if HAVE_METEOR
if (!FileExists(meteor_jar_path)) {
cerr << meteor_jar_path << " not found!\n";
abort();
}
s.reset(new METEORServer(string("java -Xmx1536m -jar ") + meteor_jar_path + " - - -mira -lower -t tune -l en"));
#else
cerr << "cdec was not built with the --with-meteor option." << endl;
abort();
#endif
} else {
cerr << "Don't know how to create score server for type '" << score_type << "'\n";
abort();
}
}
return s.get();
}
ScoreServer::ScoreServer(const string& cmd) {
static bool need_init = true;
if (need_init) {
need_init = false;
signal(SIGCHLD, metric_child_signal_handler);
}
cerr << "Invoking " << cmd << " ..." << endl;
if (pipe(p2c) < 0) { perror("pipe"); exit(1); }
if (pipe(c2p) < 0) { perror("pipe"); exit(1); }
pid_t cpid = fork();
if (cpid < 0) { perror("fork"); exit(1); }
if (cpid == 0) { // child
close(p2c[1]);
close(c2p[0]);
dup2(p2c[0], 0);
close(p2c[0]);
dup2(c2p[1], 1);
close(c2p[1]);
cerr << "Exec'ing from child " << cmd << endl;
vector<string> vargs;
SplitOnWhitespace(cmd, &vargs);
const char** cargv = static_cast<const char**>(malloc(sizeof(const char*) * vargs.size()));
for (unsigned i = 1; i < vargs.size(); ++i) cargv[i-1] = vargs[i].c_str();
cargv[vargs.size() - 1] = NULL;
execvp(vargs[0].c_str(), (char* const*)cargv);
} else { // parent
close(c2p[1]);
close(p2c[0]);
}
string dummy;
RequestResponse("SCORE ||| Reference initialization string . ||| Testing initialization string .", &dummy);
assert(dummy.size() > 0);
cerr << "Connection established.\n";
}
ScoreServer::~ScoreServer() {
// TODO close stuff, join stuff
}
float ScoreServer::ComputeScore(const vector<float>& fields) {
ostringstream os;
os << "EVAL |||";
for (unsigned i = 0; i < fields.size(); ++i)
os << ' ' << fields[i];
string sres;
RequestResponse(os.str(), &sres);
return strtod(sres.c_str(), NULL);
}
void ScoreServer::Evaluate(const vector<vector<WordID> >& refs, const vector<WordID>& hyp, vector<float>* fields) {
ostringstream os;
os << "SCORE";
for (unsigned i = 0; i < refs.size(); ++i) {
os << " |||";
for (unsigned j = 0; j < refs[i].size(); ++j) {
os << ' ' << TD::Convert(refs[i][j]);
}
}
os << " |||";
for (unsigned i = 0; i < hyp.size(); ++i) {
os << ' ' << TD::Convert(hyp[i]);
}
string sres;
RequestResponse(os.str(), &sres);
istringstream is(sres);
float val;
fields->clear();
while(is >> val)
fields->push_back(val);
}
#define MAX_BUF 16000
void ScoreServer::RequestResponse(const string& request, string* response) {
// cerr << "@SERVER: " << request << endl;
string x = request + "\n";
write(p2c[1], x.c_str(), x.size());
char buf[MAX_BUF];
size_t n = read(c2p[0], buf, MAX_BUF);
while (n < MAX_BUF && buf[n-1] != '\n')
n += read(c2p[0], &buf[n], MAX_BUF - n);
buf[n-1] = 0;
if (n < 2) {
cerr << "Malformed response: " << buf << endl;
}
*response = Trim(buf, " \t\n");
// cerr << "@RESPONSE: '" << *response << "'\n";
}
struct ExternalScore : public ScoreBase<ExternalScore> {
ExternalScore() : score_server() {}
explicit ExternalScore(ScoreServer* s) : score_server(s), fields() {}
ExternalScore(ScoreServer* s, const vector<float>& f) : score_server(s), fields(f) {}
float ComputePartialScore() const { return 0.0;}
float ComputeScore() const {
return score_server->ComputeScore(fields);
}
void ScoreDetails(string* details) const {
ostringstream os;
os << "EXT=" << ComputeScore() << " <";
for (unsigned i = 0; i < fields.size(); ++i)
os << (i ? " " : "") << fields[i];
os << '>';
*details = os.str();
}
void PlusPartialEquals(const Score&, int, int, int){
assert(!"not implemented"); // no idea
}
void PlusEquals(const Score& delta, const float scale) {
if (static_cast<const ExternalScore&>(delta).score_server) score_server = static_cast<const ExternalScore&>(delta).score_server;
if (fields.size() != static_cast<const ExternalScore&>(delta).fields.size())
fields.resize(max(fields.size(), static_cast<const ExternalScore&>(delta).fields.size()));
for (unsigned i = 0; i < static_cast<const ExternalScore&>(delta).fields.size(); ++i)
fields[i] += static_cast<const ExternalScore&>(delta).fields[i] * scale;
}
void PlusEquals(const Score& delta) {
if (static_cast<const ExternalScore&>(delta).score_server) score_server = static_cast<const ExternalScore&>(delta).score_server;
if (fields.size() != static_cast<const ExternalScore&>(delta).fields.size())
fields.resize(max(fields.size(), static_cast<const ExternalScore&>(delta).fields.size()));
for (unsigned i = 0; i < static_cast<const ExternalScore&>(delta).fields.size(); ++i)
fields[i] += static_cast<const ExternalScore&>(delta).fields[i];
}
ScoreP GetZero() const {
return ScoreP(new ExternalScore(score_server));
}
ScoreP GetOne() const {
return ScoreP(new ExternalScore(score_server));
}
void Subtract(const Score& rhs, Score* res) const {
static_cast<ExternalScore*>(res)->score_server = score_server;
vector<float>& rf = static_cast<ExternalScore*>(res)->fields;
rf.resize(max(fields.size(), static_cast<const ExternalScore&>(rhs).fields.size()));
for (unsigned i = 0; i < rf.size(); ++i) {
rf[i] = (i < fields.size() ? fields[i] : 0.0f) -
(i < static_cast<const ExternalScore&>(rhs).fields.size() ? static_cast<const ExternalScore&>(rhs).fields[i] : 0.0f);
}
}
void Encode(string* out) const {
ostringstream os;
for (unsigned i = 0; i < fields.size(); ++i)
os << (i == 0 ? "" : " ") << fields[i];
*out = os.str();
}
bool IsAdditiveIdentity() const {
for (unsigned i = 0; i < fields.size(); ++i)
if (fields[i]) return false;
return true;
}
mutable ScoreServer* score_server;
vector<float> fields;
};
ScoreP ExternalSentenceScorer::ScoreCandidate(const Sentence& hyp) const {
ExternalScore* res = new ExternalScore(eval_server);
eval_server->Evaluate(refs, hyp, &res->fields);
return ScoreP(res);
}
ScoreP ExternalSentenceScorer::ScoreCCandidate(const Sentence& hyp) const {
assert(!"not implemented");
}
ScoreP ExternalSentenceScorer::ScoreFromString(ScoreServer* s, const string& data) {
istringstream is(data);
vector<float> fields;
float val;
while(is >> val)
fields.push_back(val);
return ScoreP(new ExternalScore(s, fields));
}
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