1 /* $Id: filter_multi.cpp,v 1.17 2006-05-15 13:22:02 adam Exp $
2 Copyright (c) 2005-2006, Index Data.
10 #include "package.hpp"
12 #include <boost/thread/thread.hpp>
13 #include <boost/thread/mutex.hpp>
14 #include <boost/thread/condition.hpp>
15 #include <boost/shared_ptr.hpp>
18 #include "filter_multi.hpp"
21 #include <yaz/otherinfo.h>
22 #include <yaz/diagbib1.h>
29 namespace mp = metaproxy_1;
30 namespace yf = mp::filter;
32 namespace metaproxy_1 {
35 struct Multi::BackendSet {
38 bool operator < (const BackendSet &k) const;
39 bool operator == (const BackendSet &k) const;
41 struct Multi::ScanTermInfo {
42 std::string m_norm_term;
43 std::string m_display_term;
45 bool operator < (const ScanTermInfo &) const;
46 bool operator == (const ScanTermInfo &) const;
47 Z_Entry *get_entry(ODR odr);
49 struct Multi::FrontendSet {
55 FrontendSet(std::string setname);
59 void round_robin(int pos, int number, std::list<PresentJob> &job);
61 std::list<BackendSet> m_backend_sets;
62 std::string m_setname;
64 struct Multi::Backend {
66 std::string m_backend_database;
69 void operator() (void); // thread operation
71 struct Multi::Frontend {
76 std::list<BackendPtr> m_backend_list;
77 std::map<std::string,Multi::FrontendSet> m_sets;
79 void multi_move(std::list<BackendPtr> &blist);
80 void init(Package &package, Z_GDU *gdu);
81 void close(Package &package);
82 void search(Package &package, Z_APDU *apdu);
83 void present(Package &package, Z_APDU *apdu);
84 void scan1(Package &package, Z_APDU *apdu);
85 void scan2(Package &package, Z_APDU *apdu);
89 Map(std::list<std::string> hosts, std::string route);
91 std::list<std::string> m_hosts;
96 friend struct Frontend;
98 FrontendPtr get_frontend(Package &package);
99 void release_frontend(Package &package);
101 std::map<std::string,std::string> m_target_route;
102 boost::mutex m_mutex;
103 boost::condition m_cond_session_ready;
104 std::map<mp::Session, FrontendPtr> m_clients;
109 bool yf::Multi::BackendSet::operator < (const BackendSet &k) const
111 return m_count < k.m_count;
114 yf::Multi::Frontend::Frontend(Rep *rep)
120 yf::Multi::Frontend::~Frontend()
124 yf::Multi::FrontendPtr yf::Multi::Rep::get_frontend(Package &package)
126 boost::mutex::scoped_lock lock(m_mutex);
128 std::map<mp::Session,yf::Multi::FrontendPtr>::iterator it;
132 it = m_clients.find(package.session());
133 if (it == m_clients.end())
136 if (!it->second->m_in_use)
138 it->second->m_in_use = true;
141 m_cond_session_ready.wait(lock);
143 FrontendPtr f(new Frontend(this));
144 m_clients[package.session()] = f;
149 void yf::Multi::Rep::release_frontend(Package &package)
151 boost::mutex::scoped_lock lock(m_mutex);
152 std::map<mp::Session,yf::Multi::FrontendPtr>::iterator it;
154 it = m_clients.find(package.session());
155 if (it != m_clients.end())
157 if (package.session().is_closed())
159 it->second->close(package);
164 it->second->m_in_use = false;
166 m_cond_session_ready.notify_all();
170 yf::Multi::FrontendSet::FrontendSet(std::string setname)
176 yf::Multi::FrontendSet::FrontendSet()
181 yf::Multi::FrontendSet::~FrontendSet()
185 yf::Multi::Map::Map(std::list<std::string> hosts, std::string route)
186 : m_hosts(hosts), m_route(route)
190 yf::Multi::Map::Map()
194 yf::Multi::Multi() : m_p(new Multi::Rep)
198 yf::Multi::~Multi() {
202 void yf::Multi::Backend::operator() (void)
204 m_package->move(m_route);
208 void yf::Multi::Frontend::close(Package &package)
210 std::list<BackendPtr>::const_iterator bit;
211 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); bit++)
215 b->m_package->copy_filter(package);
216 b->m_package->request() = (Z_GDU *) 0;
217 b->m_package->session().close();
218 b->m_package->move(b->m_route);
222 void yf::Multi::Frontend::multi_move(std::list<BackendPtr> &blist)
224 std::list<BackendPtr>::const_iterator bit;
225 boost::thread_group g;
226 for (bit = blist.begin(); bit != blist.end(); bit++)
228 g.add_thread(new boost::thread(**bit));
233 void yf::Multi::FrontendSet::round_robin(int start, int number,
234 std::list<PresentJob> &jobs)
237 std::list<int> inside_pos;
238 std::list<BackendSet>::const_iterator bsit;
239 for (bsit = m_backend_sets.begin(); bsit != m_backend_sets.end(); bsit++)
242 inside_pos.push_back(0);
247 // optimization step!
253 // find min count for each set which is > omin
254 for (bsit = m_backend_sets.begin(); bsit != m_backend_sets.end(); bsit++)
256 if (bsit->m_count > omin)
258 if (no_left == 0 || bsit->m_count < min)
263 if (no_left == 0) // if nothing greater than omin, bail out.
265 int skip = no_left * min;
266 if (p + skip > start) // step gets us "into" present range?
268 // Yes. skip until start.. Rounding off is deliberate!
269 min = (start-p) / no_left;
272 // update positions in each set..
273 std::list<int>::iterator psit = pos.begin();
274 for (psit = pos.begin(); psit != pos.end(); psit++)
278 // skip on each set.. before "present range"..
281 std::cout << "\nSKIP min=" << min << " no_left=" << no_left << "\n\n";
283 std::list<int>::iterator psit = pos.begin();
284 for (psit = pos.begin(); psit != pos.end(); psit++)
287 omin = min; // update so we consider next class (with higher count)
295 std::list<int>::iterator psit = pos.begin();
296 std::list<int>::iterator esit = inside_pos.begin();
297 bsit = m_backend_sets.begin();
299 for (; bsit != m_backend_sets.end(); psit++,esit++,bsit++)
301 if (fetched >= number)
306 if (*psit <= bsit->m_count)
311 job.m_backend = bsit->m_backend;
313 job.m_inside_pos = *esit;
326 void yf::Multi::Frontend::init(Package &package, Z_GDU *gdu)
328 Z_InitRequest *req = gdu->u.z3950->u.initRequest;
330 std::list<std::string> targets;
332 mp::util::get_vhost_otherinfo(&req->otherInfo, false, targets);
334 if (targets.size() < 1)
340 std::list<std::string>::const_iterator t_it = targets.begin();
341 for (; t_it != targets.end(); t_it++)
344 Backend *b = new Backend;
347 b->m_route = m_p->m_target_route[*t_it];
349 b->m_package = PackagePtr(new Package(s, package.origin()));
351 m_backend_list.push_back(BackendPtr(b));
355 // create init request
356 std::list<BackendPtr>::const_iterator bit;
357 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); bit++)
361 Z_APDU *init_apdu = zget_APDU(odr, Z_APDU_initRequest);
363 std::list<std::string>vhost_one;
364 vhost_one.push_back(b->m_vhost);
365 mp::util::set_vhost_otherinfo(&init_apdu->u.initRequest->otherInfo,
368 Z_InitRequest *req = init_apdu->u.initRequest;
370 ODR_MASK_SET(req->options, Z_Options_search);
371 ODR_MASK_SET(req->options, Z_Options_present);
372 ODR_MASK_SET(req->options, Z_Options_namedResultSets);
373 ODR_MASK_SET(req->options, Z_Options_scan);
375 ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_1);
376 ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_2);
377 ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_3);
379 b->m_package->request() = init_apdu;
381 b->m_package->copy_filter(package);
383 multi_move(m_backend_list);
385 // create the frontend init response based on each backend init response
388 Z_APDU *f_apdu = odr.create_initResponse(gdu->u.z3950, 0, 0);
389 Z_InitResponse *f_resp = f_apdu->u.initResponse;
391 ODR_MASK_SET(f_resp->options, Z_Options_search);
392 ODR_MASK_SET(f_resp->options, Z_Options_present);
393 ODR_MASK_SET(f_resp->options, Z_Options_namedResultSets);
395 ODR_MASK_SET(f_resp->protocolVersion, Z_ProtocolVersion_1);
396 ODR_MASK_SET(f_resp->protocolVersion, Z_ProtocolVersion_2);
397 ODR_MASK_SET(f_resp->protocolVersion, Z_ProtocolVersion_3);
399 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); bit++)
401 PackagePtr p = (*bit)->m_package;
403 if (p->session().is_closed()) // if any backend closes, close frontend
404 package.session().close();
405 Z_GDU *gdu = p->response().get();
406 if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
410 Z_APDU *b_apdu = gdu->u.z3950;
411 Z_InitResponse *b_resp = b_apdu->u.initResponse;
413 // common options for all backends
414 for (i = 0; i <= Z_Options_stringSchema; i++)
416 if (!ODR_MASK_GET(b_resp->options, i))
417 ODR_MASK_CLEAR(f_resp->options, i);
419 // common protocol version
420 for (i = 0; i <= Z_ProtocolVersion_3; i++)
421 if (!ODR_MASK_GET(b_resp->protocolVersion, i))
422 ODR_MASK_CLEAR(f_resp->protocolVersion, i);
423 // reject if any of the backends reject
424 if (!*b_resp->result)
429 // if any target does not return init return that (close or
431 package.response() = p->response();
435 package.response() = f_apdu;
438 void yf::Multi::Frontend::search(Package &package, Z_APDU *apdu_req)
440 // create search request
441 Z_SearchRequest *req = apdu_req->u.searchRequest;
443 // save these for later
444 int smallSetUpperBound = *req->smallSetUpperBound;
445 int largeSetLowerBound = *req->largeSetLowerBound;
446 int mediumSetPresentNumber = *req->mediumSetPresentNumber;
448 // they are altered now - to disable piggyback
449 *req->smallSetUpperBound = 0;
450 *req->largeSetLowerBound = 1;
451 *req->mediumSetPresentNumber = 1;
453 int default_num_db = req->num_databaseNames;
454 char **default_db = req->databaseNames;
456 std::list<BackendPtr>::const_iterator bit;
457 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); bit++)
459 PackagePtr p = (*bit)->m_package;
462 if (!mp::util::set_databases_from_zurl(odr, (*bit)->m_vhost,
463 &req->num_databaseNames,
464 &req->databaseNames))
466 req->num_databaseNames = default_num_db;
467 req->databaseNames = default_db;
469 p->request() = apdu_req;
470 p->copy_filter(package);
472 multi_move(m_backend_list);
474 // look at each response
475 FrontendSet resultSet(std::string(req->resultSetName));
477 int result_set_size = 0;
478 Z_Records *z_records_diag = 0; // no diagnostics (yet)
479 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); bit++)
481 PackagePtr p = (*bit)->m_package;
483 if (p->session().is_closed()) // if any backend closes, close frontend
484 package.session().close();
486 Z_GDU *gdu = p->response().get();
487 if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
488 Z_APDU_searchResponse)
490 Z_APDU *b_apdu = gdu->u.z3950;
491 Z_SearchResponse *b_resp = b_apdu->u.searchResponse;
493 // see we get any errors (AKA diagnstics)
496 if (b_resp->records->which == Z_Records_NSD
497 || b_resp->records->which == Z_Records_multipleNSD)
498 z_records_diag = b_resp->records;
499 // we may set this multiple times (TOO BAD!)
501 BackendSet backendSet;
502 backendSet.m_backend = *bit;
503 backendSet.m_count = *b_resp->resultCount;
504 result_set_size += *b_resp->resultCount;
505 resultSet.m_backend_sets.push_back(backendSet);
509 // if any target does not return search response - return that
510 package.response() = p->response();
516 Z_APDU *f_apdu = odr.create_searchResponse(apdu_req, 0, 0);
517 Z_SearchResponse *f_resp = f_apdu->u.searchResponse;
519 *f_resp->resultCount = result_set_size;
523 f_resp->records = z_records_diag;
524 package.response() = f_apdu;
528 m_sets[resultSet.m_setname] = resultSet;
531 mp::util::piggyback(smallSetUpperBound,
533 mediumSetPresentNumber,
536 Package pp(package.session(), package.origin());
539 pp.copy_filter(package);
540 Z_APDU *p_apdu = zget_APDU(odr, Z_APDU_presentRequest);
541 Z_PresentRequest *p_req = p_apdu->u.presentRequest;
542 p_req->preferredRecordSyntax = req->preferredRecordSyntax;
543 p_req->resultSetId = req->resultSetName;
544 *p_req->resultSetStartPoint = 1;
545 *p_req->numberOfRecordsRequested = number;
546 pp.request() = p_apdu;
549 if (pp.session().is_closed())
550 package.session().close();
552 Z_GDU *gdu = pp.response().get();
553 if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
554 Z_APDU_presentResponse)
556 Z_PresentResponse *p_res = gdu->u.z3950->u.presentResponse;
557 f_resp->records = p_res->records;
558 *f_resp->numberOfRecordsReturned =
559 *p_res->numberOfRecordsReturned;
560 *f_resp->nextResultSetPosition =
561 *p_res->nextResultSetPosition;
565 package.response() = pp.response();
569 package.response() = f_apdu; // in this scope because of p
572 void yf::Multi::Frontend::present(Package &package, Z_APDU *apdu_req)
574 // create present request
575 Z_PresentRequest *req = apdu_req->u.presentRequest;
578 it = m_sets.find(std::string(req->resultSetId));
579 if (it == m_sets.end())
583 odr.create_presentResponse(
585 YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST,
587 package.response() = apdu;
590 std::list<Multi::FrontendSet::PresentJob> jobs;
591 int start = *req->resultSetStartPoint;
592 int number = *req->numberOfRecordsRequested;
593 it->second.round_robin(start, number, jobs);
595 std::list<BackendPtr> present_backend_list;
597 std::list<BackendSet>::const_iterator bsit;
598 bsit = it->second.m_backend_sets.begin();
599 for (; bsit != it->second.m_backend_sets.end(); bsit++)
601 std::list<Multi::FrontendSet::PresentJob>::const_iterator jit;
605 for (jit = jobs.begin(); jit != jobs.end(); jit++)
607 if (jit->m_backend == bsit->m_backend)
609 if (start == -1 || jit->m_pos < start)
611 if (end == -1 || jit->m_pos > end)
617 PackagePtr p = bsit->m_backend->m_package;
619 *req->resultSetStartPoint = start;
620 *req->numberOfRecordsRequested = end - start + 1;
622 p->request() = apdu_req;
623 p->copy_filter(package);
625 present_backend_list.push_back(bsit->m_backend);
628 multi_move(present_backend_list);
630 // look at each response
631 Z_Records *z_records_diag = 0;
633 std::list<BackendPtr>::const_iterator pbit = present_backend_list.begin();
634 for (; pbit != present_backend_list.end(); pbit++)
636 PackagePtr p = (*pbit)->m_package;
638 if (p->session().is_closed()) // if any backend closes, close frontend
639 package.session().close();
641 Z_GDU *gdu = p->response().get();
642 if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
643 Z_APDU_presentResponse)
645 Z_APDU *b_apdu = gdu->u.z3950;
646 Z_PresentResponse *b_resp = b_apdu->u.presentResponse;
648 // see we get any errors (AKA diagnstics)
651 if (b_resp->records->which != Z_Records_DBOSD)
652 z_records_diag = b_resp->records;
653 // we may set this multiple times (TOO BAD!)
658 // if any target does not return present response - return that
659 package.response() = p->response();
665 Z_APDU *f_apdu = odr.create_presentResponse(apdu_req, 0, 0);
666 Z_PresentResponse *f_resp = f_apdu->u.presentResponse;
670 f_resp->records = z_records_diag;
671 *f_resp->presentStatus = Z_PresentStatus_failure;
675 f_resp->records = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
676 Z_Records * records = f_resp->records;
677 records->which = Z_Records_DBOSD;
678 records->u.databaseOrSurDiagnostics =
679 (Z_NamePlusRecordList *)
680 odr_malloc(odr, sizeof(Z_NamePlusRecordList));
681 Z_NamePlusRecordList *nprl = records->u.databaseOrSurDiagnostics;
682 nprl->num_records = jobs.size();
683 nprl->records = (Z_NamePlusRecord**)
684 odr_malloc(odr, sizeof(Z_NamePlusRecord *) * nprl->num_records);
686 std::list<Multi::FrontendSet::PresentJob>::const_iterator jit;
687 for (jit = jobs.begin(); jit != jobs.end(); jit++)
689 PackagePtr p = jit->m_backend->m_package;
691 Z_GDU *gdu = p->response().get();
692 Z_APDU *b_apdu = gdu->u.z3950;
693 Z_PresentResponse *b_resp = b_apdu->u.presentResponse;
696 b_resp->records->u.databaseOrSurDiagnostics->
697 records[jit->m_inside_pos];
699 *f_resp->nextResultSetPosition = start + i;
700 *f_resp->numberOfRecordsReturned = i;
702 package.response() = f_apdu;
705 void yf::Multi::Frontend::scan1(Package &package, Z_APDU *apdu_req)
707 if (m_backend_list.size() > 1)
711 odr.create_scanResponse(
712 apdu_req, YAZ_BIB1_COMBI_OF_SPECIFIED_DATABASES_UNSUPP, 0);
713 package.response() = f_apdu;
716 Z_ScanRequest *req = apdu_req->u.scanRequest;
718 int default_num_db = req->num_databaseNames;
719 char **default_db = req->databaseNames;
721 std::list<BackendPtr>::const_iterator bit;
722 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); bit++)
724 PackagePtr p = (*bit)->m_package;
727 if (!mp::util::set_databases_from_zurl(odr, (*bit)->m_vhost,
728 &req->num_databaseNames,
729 &req->databaseNames))
731 req->num_databaseNames = default_num_db;
732 req->databaseNames = default_db;
734 p->request() = apdu_req;
735 p->copy_filter(package);
737 multi_move(m_backend_list);
739 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); bit++)
741 PackagePtr p = (*bit)->m_package;
743 if (p->session().is_closed()) // if any backend closes, close frontend
744 package.session().close();
746 Z_GDU *gdu = p->response().get();
747 if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
750 package.response() = p->response();
755 // if any target does not return scan response - return that
756 package.response() = p->response();
762 bool yf::Multi::ScanTermInfo::operator < (const ScanTermInfo &k) const
764 return m_norm_term < k.m_norm_term;
767 bool yf::Multi::ScanTermInfo::operator == (const ScanTermInfo &k) const
769 return m_norm_term == k.m_norm_term;
772 Z_Entry *yf::Multi::ScanTermInfo::get_entry(ODR odr)
774 Z_Entry *e = (Z_Entry *)odr_malloc(odr, sizeof(*e));
775 e->which = Z_Entry_termInfo;
777 t = e->u.termInfo = (Z_TermInfo *) odr_malloc(odr, sizeof(*t));
778 t->suggestedAttributes = 0;
780 t->alternativeTerm = 0;
782 t->otherTermInfo = 0;
783 t->globalOccurrences = odr_intdup(odr, m_count);
785 odr_malloc(odr, sizeof(*t->term));
786 t->term->which = Z_Term_general;
788 t->term->u.general = o = (Odr_oct *)odr_malloc(odr, sizeof(Odr_oct));
790 o->len = o->size = m_norm_term.size();
791 o->buf = (unsigned char *) odr_malloc(odr, o->len);
792 memcpy(o->buf, m_norm_term.c_str(), o->len);
796 void yf::Multi::Frontend::scan2(Package &package, Z_APDU *apdu_req)
798 Z_ScanRequest *req = apdu_req->u.scanRequest;
800 int default_num_db = req->num_databaseNames;
801 char **default_db = req->databaseNames;
803 std::list<BackendPtr>::const_iterator bit;
804 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); bit++)
806 PackagePtr p = (*bit)->m_package;
809 if (!mp::util::set_databases_from_zurl(odr, (*bit)->m_vhost,
810 &req->num_databaseNames,
811 &req->databaseNames))
813 req->num_databaseNames = default_num_db;
814 req->databaseNames = default_db;
816 p->request() = apdu_req;
817 p->copy_filter(package);
819 multi_move(m_backend_list);
821 ScanTermInfoList entries_before;
822 ScanTermInfoList entries_after;
826 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); bit++)
828 PackagePtr p = (*bit)->m_package;
830 if (p->session().is_closed()) // if any backend closes, close frontend
831 package.session().close();
833 Z_GDU *gdu = p->response().get();
834 if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
837 Z_ScanResponse *res = gdu->u.z3950->u.scanResponse;
839 if (res->entries && res->entries->nonsurrogateDiagnostics)
843 Z_APDU *f_apdu = odr.create_scanResponse(apdu_req, 1, 0);
844 Z_ScanResponse *f_res = f_apdu->u.scanResponse;
846 f_res->entries->nonsurrogateDiagnostics =
847 res->entries->nonsurrogateDiagnostics;
848 f_res->entries->num_nonsurrogateDiagnostics =
849 res->entries->num_nonsurrogateDiagnostics;
851 package.response() = f_apdu;
855 if (res->entries && res->entries->entries)
857 Z_Entry **entries = res->entries->entries;
858 int num_entries = res->entries->num_entries;
860 if (req->preferredPositionInResponse)
861 position = *req->preferredPositionInResponse;
862 if (res->positionOfTerm)
863 position = *res->positionOfTerm;
867 for (i = 0; i<position-1 && i<num_entries; i++)
869 Z_Entry *ent = entries[i];
871 if (ent->which == Z_Entry_termInfo)
875 int *occur = ent->u.termInfo->globalOccurrences;
876 my.m_count = occur ? *occur : 0;
878 if (ent->u.termInfo->term->which == Z_Term_general)
880 my.m_norm_term = std::string(
882 ent->u.termInfo->term->u.general->buf,
883 ent->u.termInfo->term->u.general->len);
885 if (my.m_norm_term.length())
887 ScanTermInfoList::iterator it =
888 entries_before.begin();
889 while (it != entries_before.end() && my <*it)
893 it->m_count += my.m_count;
897 entries_before.insert(it, my);
908 for ( ; i<num_entries; i++)
910 Z_Entry *ent = entries[i];
912 if (ent->which == Z_Entry_termInfo)
916 int *occur = ent->u.termInfo->globalOccurrences;
917 my.m_count = occur ? *occur : 0;
919 if (ent->u.termInfo->term->which == Z_Term_general)
921 my.m_norm_term = std::string(
923 ent->u.termInfo->term->u.general->buf,
924 ent->u.termInfo->term->u.general->len);
926 if (my.m_norm_term.length())
928 ScanTermInfoList::iterator it =
929 entries_after.begin();
930 while (it != entries_after.end() && *it < my)
934 it->m_count += my.m_count;
938 entries_after.insert(it, my);
949 // if any target does not return scan response - return that
950 package.response() = p->response();
957 std::cout << "BEFORE\n";
958 ScanTermInfoList::iterator it = entries_before.begin();
959 for(; it != entries_before.end(); it++)
961 std::cout << " " << it->m_norm_term << " " << it->m_count << "\n";
964 std::cout << "AFTER\n";
965 it = entries_after.begin();
966 for(; it != entries_after.end(); it++)
968 std::cout << " " << it->m_norm_term << " " << it->m_count << "\n";
975 Z_APDU *f_apdu = odr.create_scanResponse(apdu_req, 1, "not implemented");
976 package.response() = f_apdu;
981 Z_APDU *f_apdu = odr.create_scanResponse(apdu_req, 0, 0);
982 Z_ScanResponse *resp = f_apdu->u.scanResponse;
984 int number_returned = *req->numberOfTermsRequested;
985 int position_returned = *req->preferredPositionInResponse;
987 resp->entries->num_entries = number_returned;
988 resp->entries->entries = (Z_Entry**)
989 odr_malloc(odr, sizeof(Z_Entry*) * number_returned);
992 int lbefore = entries_before.size();
993 if (lbefore < position_returned-1)
994 position_returned = lbefore+1;
996 ScanTermInfoList::iterator it = entries_before.begin();
997 for (i = 0; i<position_returned-1 && it != entries_before.end(); i++, it++)
999 resp->entries->entries[position_returned-2-i] = it->get_entry(odr);
1002 it = entries_after.begin();
1004 if (position_returned <= 0)
1007 i = position_returned-1;
1008 for (; i<number_returned && it != entries_after.end(); i++, it++)
1010 resp->entries->entries[i] = it->get_entry(odr);
1013 number_returned = i;
1015 resp->positionOfTerm = odr_intdup(odr, position_returned);
1016 resp->numberOfEntriesReturned = odr_intdup(odr, number_returned);
1017 resp->entries->num_entries = number_returned;
1019 package.response() = f_apdu;
1024 void yf::Multi::process(Package &package) const
1026 FrontendPtr f = m_p->get_frontend(package);
1028 Z_GDU *gdu = package.request().get();
1030 if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
1031 Z_APDU_initRequest && !f->m_is_multi)
1033 f->init(package, gdu);
1035 else if (!f->m_is_multi)
1037 else if (gdu && gdu->which == Z_GDU_Z3950)
1039 Z_APDU *apdu = gdu->u.z3950;
1040 if (apdu->which == Z_APDU_initRequest)
1044 package.response() = odr.create_close(
1046 Z_Close_protocolError,
1049 package.session().close();
1051 else if (apdu->which == Z_APDU_searchRequest)
1053 f->search(package, apdu);
1055 else if (apdu->which == Z_APDU_presentRequest)
1057 f->present(package, apdu);
1059 else if (apdu->which == Z_APDU_scanRequest)
1061 f->scan2(package, apdu);
1067 package.response() = odr.create_close(
1068 apdu, Z_Close_protocolError,
1069 "unsupported APDU in filter multi");
1071 package.session().close();
1074 m_p->release_frontend(package);
1077 void mp::filter::Multi::configure(const xmlNode * ptr)
1079 for (ptr = ptr->children; ptr; ptr = ptr->next)
1081 if (ptr->type != XML_ELEMENT_NODE)
1083 if (!strcmp((const char *) ptr->name, "target"))
1085 std::string route = mp::xml::get_route(ptr);
1086 std::string target = mp::xml::get_text(ptr);
1087 std::cout << "route=" << route << " target=" << target << "\n";
1088 m_p->m_target_route[target] = route;
1092 throw mp::filter::FilterException
1094 + std::string((const char *) ptr->name)
1095 + " in virt_db filter");
1100 static mp::filter::Base* filter_creator()
1102 return new mp::filter::Multi;
1106 struct metaproxy_1_filter_struct metaproxy_1_filter_multi = {
1117 * indent-tabs-mode: nil
1118 * c-file-style: "stroustrup"
1120 * vim: shiftwidth=4 tabstop=8 expandtab