1 /* $Id: filter_multi.cpp,v 1.31 2008-02-20 15:07:52 adam Exp $
2 Copyright (c) 2005-2007, Index Data.
4 This file is part of Metaproxy.
6 Metaproxy is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 2, or (at your option) any later
11 Metaproxy is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with Metaproxy; see the file LICENSE. If not, write to the
18 Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
27 #include "package.hpp"
29 #include <boost/thread/thread.hpp>
30 #include <boost/thread/mutex.hpp>
31 #include <boost/thread/condition.hpp>
32 #include <boost/shared_ptr.hpp>
35 #include "filter_multi.hpp"
38 #include <yaz/otherinfo.h>
39 #include <yaz/diagbib1.h>
46 namespace mp = metaproxy_1;
47 namespace yf = mp::filter;
49 namespace metaproxy_1 {
51 enum multi_merge_type {
55 struct Multi::BackendSet {
58 bool operator < (const BackendSet &k) const;
59 bool operator == (const BackendSet &k) const;
61 struct Multi::ScanTermInfo {
62 std::string m_norm_term;
63 std::string m_display_term;
65 bool operator < (const ScanTermInfo &) const;
66 bool operator == (const ScanTermInfo &) const;
67 Z_Entry *get_entry(ODR odr);
69 struct Multi::FrontendSet {
73 int m_pos; // position for backend (1=first, 2=second,..
74 int m_start; // present request start
75 PresentJob(BackendPtr ptr, int pos) :
76 m_backend(ptr), m_pos(pos), m_start(0) {};
78 FrontendSet(std::string setname);
82 void round_robin(int pos, int number, std::list<PresentJob> &job);
83 void serve_order(int pos, int number, std::list<PresentJob> &job);
85 std::list<BackendSet> m_backend_sets;
86 std::string m_setname;
88 struct Multi::Backend {
90 std::string m_backend_database;
93 void operator() (void); // thread operation
95 struct Multi::Frontend {
100 std::list<BackendPtr> m_backend_list;
101 std::map<std::string,Multi::FrontendSet> m_sets;
103 void multi_move(std::list<BackendPtr> &blist);
104 void init(Package &package, Z_GDU *gdu);
105 void close(Package &package);
106 void search(Package &package, Z_APDU *apdu);
107 void present(Package &package, Z_APDU *apdu);
108 void scan1(Package &package, Z_APDU *apdu);
109 void scan2(Package &package, Z_APDU *apdu);
113 Map(std::list<std::string> hosts, std::string route);
115 std::list<std::string> m_hosts;
120 friend struct Frontend;
123 FrontendPtr get_frontend(Package &package);
124 void release_frontend(Package &package);
126 std::map<std::string,std::string> m_target_route;
127 boost::mutex m_mutex;
128 boost::condition m_cond_session_ready;
129 std::map<mp::Session, FrontendPtr> m_clients;
130 bool m_hide_unavailable;
131 multi_merge_type m_merge_type;
136 yf::Multi::Rep::Rep()
138 m_hide_unavailable = false;
139 m_merge_type = round_robin;
142 bool yf::Multi::BackendSet::operator < (const BackendSet &k) const
144 return m_count < k.m_count;
147 yf::Multi::Frontend::Frontend(Rep *rep)
153 yf::Multi::Frontend::~Frontend()
157 yf::Multi::FrontendPtr yf::Multi::Rep::get_frontend(mp::Package &package)
159 boost::mutex::scoped_lock lock(m_mutex);
161 std::map<mp::Session,yf::Multi::FrontendPtr>::iterator it;
165 it = m_clients.find(package.session());
166 if (it == m_clients.end())
169 if (!it->second->m_in_use)
171 it->second->m_in_use = true;
174 m_cond_session_ready.wait(lock);
176 FrontendPtr f(new Frontend(this));
177 m_clients[package.session()] = f;
182 void yf::Multi::Rep::release_frontend(mp::Package &package)
184 boost::mutex::scoped_lock lock(m_mutex);
185 std::map<mp::Session,yf::Multi::FrontendPtr>::iterator it;
187 it = m_clients.find(package.session());
188 if (it != m_clients.end())
190 if (package.session().is_closed())
192 it->second->close(package);
197 it->second->m_in_use = false;
199 m_cond_session_ready.notify_all();
203 yf::Multi::FrontendSet::FrontendSet(std::string setname)
209 yf::Multi::FrontendSet::FrontendSet()
214 yf::Multi::FrontendSet::~FrontendSet()
218 yf::Multi::Map::Map(std::list<std::string> hosts, std::string route)
219 : m_hosts(hosts), m_route(route)
223 yf::Multi::Map::Map()
227 yf::Multi::Multi() : m_p(new Multi::Rep)
231 yf::Multi::~Multi() {
235 void yf::Multi::Backend::operator() (void)
237 m_package->move(m_route);
241 void yf::Multi::Frontend::close(mp::Package &package)
243 std::list<BackendPtr>::const_iterator bit;
244 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); bit++)
248 b->m_package->copy_filter(package);
249 b->m_package->request() = (Z_GDU *) 0;
250 b->m_package->session().close();
251 b->m_package->move(b->m_route);
255 void yf::Multi::Frontend::multi_move(std::list<BackendPtr> &blist)
257 std::list<BackendPtr>::const_iterator bit;
258 boost::thread_group g;
259 for (bit = blist.begin(); bit != blist.end(); bit++)
261 g.add_thread(new boost::thread(**bit));
266 void yf::Multi::FrontendSet::serve_order(int start, int number,
267 std::list<PresentJob> &jobs)
270 for (i = 0; i < number; i++)
272 std::list<BackendSet>::const_iterator bsit;
274 int offset = start + i - 1;
275 for (bsit = m_backend_sets.begin(); bsit != m_backend_sets.end();
278 if (offset >= voffset && offset < voffset + bsit->m_count)
280 PresentJob job(bsit->m_backend, offset - voffset + 1);
284 voffset += bsit->m_count;
289 void yf::Multi::FrontendSet::round_robin(int start, int number,
290 std::list<PresentJob> &jobs)
293 std::list<BackendSet>::const_iterator bsit;
294 for (bsit = m_backend_sets.begin(); bsit != m_backend_sets.end(); bsit++)
301 // optimization step!
307 // find min count for each set which is > omin
308 for (bsit = m_backend_sets.begin(); bsit != m_backend_sets.end(); bsit++)
310 if (bsit->m_count > omin)
312 if (no_left == 0 || bsit->m_count < min)
317 if (no_left == 0) // if nothing greater than omin, bail out.
319 int skip = no_left * min;
320 if (p + skip > start) // step gets us "into" present range?
322 // Yes. skip until start.. Rounding off is deliberate!
323 min = (start-p) / no_left;
326 // update positions in each set..
327 std::list<int>::iterator psit = pos.begin();
328 for (psit = pos.begin(); psit != pos.end(); psit++)
332 // skip on each set.. before "present range"..
335 std::list<int>::iterator psit = pos.begin();
336 for (psit = pos.begin(); psit != pos.end(); psit++)
339 omin = min; // update so we consider next class (with higher count)
347 std::list<int>::iterator psit = pos.begin();
348 bsit = m_backend_sets.begin();
350 for (; bsit != m_backend_sets.end(); psit++,bsit++)
352 if (fetched >= number)
357 if (*psit <= bsit->m_count)
361 PresentJob job(bsit->m_backend, *psit);
373 void yf::Multi::Frontend::init(mp::Package &package, Z_GDU *gdu)
375 Z_InitRequest *req = gdu->u.z3950->u.initRequest;
377 std::list<std::string> targets;
379 mp::util::get_vhost_otherinfo(req->otherInfo, targets);
381 if (targets.size() < 1)
387 std::list<std::string>::const_iterator t_it = targets.begin();
388 for (; t_it != targets.end(); t_it++)
391 Backend *b = new Backend;
394 b->m_route = m_p->m_target_route[*t_it];
396 b->m_package = PackagePtr(new Package(s, package.origin()));
398 m_backend_list.push_back(BackendPtr(b));
402 // create init request
403 std::list<BackendPtr>::iterator bit;
404 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); bit++)
408 Z_APDU *init_apdu = zget_APDU(odr, Z_APDU_initRequest);
410 std::list<std::string>vhost_one;
411 vhost_one.push_back(b->m_vhost);
412 mp::util::set_vhost_otherinfo(&init_apdu->u.initRequest->otherInfo,
415 Z_InitRequest *req = init_apdu->u.initRequest;
417 ODR_MASK_SET(req->options, Z_Options_search);
418 ODR_MASK_SET(req->options, Z_Options_present);
419 ODR_MASK_SET(req->options, Z_Options_namedResultSets);
420 ODR_MASK_SET(req->options, Z_Options_scan);
422 ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_1);
423 ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_2);
424 ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_3);
426 b->m_package->request() = init_apdu;
428 b->m_package->copy_filter(package);
430 multi_move(m_backend_list);
432 // create the frontend init response based on each backend init response
435 Z_APDU *f_apdu = odr.create_initResponse(gdu->u.z3950, 0, 0);
436 Z_InitResponse *f_resp = f_apdu->u.initResponse;
438 ODR_MASK_SET(f_resp->options, Z_Options_search);
439 ODR_MASK_SET(f_resp->options, Z_Options_present);
440 ODR_MASK_SET(f_resp->options, Z_Options_namedResultSets);
442 ODR_MASK_SET(f_resp->protocolVersion, Z_ProtocolVersion_1);
443 ODR_MASK_SET(f_resp->protocolVersion, Z_ProtocolVersion_2);
444 ODR_MASK_SET(f_resp->protocolVersion, Z_ProtocolVersion_3);
447 int no_succeeded = 0;
448 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); )
450 PackagePtr p = (*bit)->m_package;
452 if (p->session().is_closed())
454 // failed. Remove from list and increment number of failed
456 bit = m_backend_list.erase(bit);
461 Z_GDU *gdu = p->response().get();
462 if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
466 Z_APDU *b_apdu = gdu->u.z3950;
467 Z_InitResponse *b_resp = b_apdu->u.initResponse;
469 // common options for all backends
470 for (i = 0; i <= Z_Options_stringSchema; i++)
472 if (!ODR_MASK_GET(b_resp->options, i))
473 ODR_MASK_CLEAR(f_resp->options, i);
475 // common protocol version
476 for (i = 0; i <= Z_ProtocolVersion_3; i++)
477 if (!ODR_MASK_GET(b_resp->protocolVersion, i))
478 ODR_MASK_CLEAR(f_resp->protocolVersion, i);
479 // reject if any of the backends reject
480 if (!*b_resp->result)
485 // if any target does not return init return that (close or
487 package.response() = p->response();
492 if (m_p->m_hide_unavailable)
494 if (no_succeeded == 0)
495 package.session().close();
500 package.session().close();
502 package.response() = f_apdu;
505 void yf::Multi::Frontend::search(mp::Package &package, Z_APDU *apdu_req)
507 // create search request
508 Z_SearchRequest *req = apdu_req->u.searchRequest;
510 // save these for later
511 int smallSetUpperBound = *req->smallSetUpperBound;
512 int largeSetLowerBound = *req->largeSetLowerBound;
513 int mediumSetPresentNumber = *req->mediumSetPresentNumber;
515 // they are altered now - to disable piggyback
516 *req->smallSetUpperBound = 0;
517 *req->largeSetLowerBound = 1;
518 *req->mediumSetPresentNumber = 1;
520 int default_num_db = req->num_databaseNames;
521 char **default_db = req->databaseNames;
523 std::list<BackendPtr>::const_iterator bit;
524 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); bit++)
526 PackagePtr p = (*bit)->m_package;
529 if (!mp::util::set_databases_from_zurl(odr, (*bit)->m_vhost,
530 &req->num_databaseNames,
531 &req->databaseNames))
533 req->num_databaseNames = default_num_db;
534 req->databaseNames = default_db;
536 p->request() = apdu_req;
537 p->copy_filter(package);
539 multi_move(m_backend_list);
541 // look at each response
542 FrontendSet resultSet(std::string(req->resultSetName));
544 int result_set_size = 0;
545 Z_Records *z_records_diag = 0; // no diagnostics (yet)
546 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); bit++)
548 PackagePtr p = (*bit)->m_package;
550 if (p->session().is_closed()) // if any backend closes, close frontend
551 package.session().close();
553 Z_GDU *gdu = p->response().get();
554 if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
555 Z_APDU_searchResponse)
557 Z_APDU *b_apdu = gdu->u.z3950;
558 Z_SearchResponse *b_resp = b_apdu->u.searchResponse;
560 // see we get any errors (AKA diagnstics)
563 if (b_resp->records->which == Z_Records_NSD
564 || b_resp->records->which == Z_Records_multipleNSD)
565 z_records_diag = b_resp->records;
566 // we may set this multiple times (TOO BAD!)
568 BackendSet backendSet;
569 backendSet.m_backend = *bit;
570 backendSet.m_count = *b_resp->resultCount;
571 result_set_size += *b_resp->resultCount;
572 resultSet.m_backend_sets.push_back(backendSet);
576 // if any target does not return search response - return that
577 package.response() = p->response();
583 Z_APDU *f_apdu = odr.create_searchResponse(apdu_req, 0, 0);
584 Z_SearchResponse *f_resp = f_apdu->u.searchResponse;
586 *f_resp->resultCount = result_set_size;
590 f_resp->records = z_records_diag;
591 package.response() = f_apdu;
595 m_sets[resultSet.m_setname] = resultSet;
598 mp::util::piggyback(smallSetUpperBound,
600 mediumSetPresentNumber,
603 Package pp(package.session(), package.origin());
606 pp.copy_filter(package);
607 Z_APDU *p_apdu = zget_APDU(odr, Z_APDU_presentRequest);
608 Z_PresentRequest *p_req = p_apdu->u.presentRequest;
609 p_req->preferredRecordSyntax = req->preferredRecordSyntax;
610 p_req->resultSetId = req->resultSetName;
611 *p_req->resultSetStartPoint = 1;
612 *p_req->numberOfRecordsRequested = number;
613 pp.request() = p_apdu;
616 if (pp.session().is_closed())
617 package.session().close();
619 Z_GDU *gdu = pp.response().get();
620 if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
621 Z_APDU_presentResponse)
623 Z_PresentResponse *p_res = gdu->u.z3950->u.presentResponse;
624 f_resp->records = p_res->records;
625 *f_resp->numberOfRecordsReturned =
626 *p_res->numberOfRecordsReturned;
627 *f_resp->nextResultSetPosition =
628 *p_res->nextResultSetPosition;
632 package.response() = pp.response();
636 package.response() = f_apdu; // in this scope because of p
639 void yf::Multi::Frontend::present(mp::Package &package, Z_APDU *apdu_req)
641 // create present request
642 Z_PresentRequest *req = apdu_req->u.presentRequest;
645 it = m_sets.find(std::string(req->resultSetId));
646 if (it == m_sets.end())
650 odr.create_presentResponse(
652 YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST,
654 package.response() = apdu;
657 std::list<Multi::FrontendSet::PresentJob> jobs;
658 int start = *req->resultSetStartPoint;
659 int number = *req->numberOfRecordsRequested;
661 if (m_p->m_merge_type == round_robin)
662 it->second.round_robin(start, number, jobs);
663 else if (m_p->m_merge_type == serve_order)
664 it->second.serve_order(start, number, jobs);
668 std::list<Multi::FrontendSet::PresentJob>::const_iterator jit;
669 for (jit = jobs.begin(); jit != jobs.end(); jit++)
671 yaz_log(YLOG_LOG, "job pos=%d", jit->m_pos);
675 std::list<BackendPtr> present_backend_list;
677 std::list<BackendSet>::const_iterator bsit;
678 bsit = it->second.m_backend_sets.begin();
679 for (; bsit != it->second.m_backend_sets.end(); bsit++)
684 std::list<Multi::FrontendSet::PresentJob>::const_iterator jit;
685 for (jit = jobs.begin(); jit != jobs.end(); jit++)
687 if (jit->m_backend == bsit->m_backend)
689 if (start == -1 || jit->m_pos < start)
691 if (end == -1 || jit->m_pos > end)
698 std::list<Multi::FrontendSet::PresentJob>::iterator jit;
699 for (jit = jobs.begin(); jit != jobs.end(); jit++)
701 if (jit->m_backend == bsit->m_backend)
703 if (jit->m_pos >= start && jit->m_pos <= end)
704 jit->m_start = start;
708 PackagePtr p = bsit->m_backend->m_package;
710 *req->resultSetStartPoint = start;
711 *req->numberOfRecordsRequested = end - start + 1;
713 p->request() = apdu_req;
714 p->copy_filter(package);
716 present_backend_list.push_back(bsit->m_backend);
719 multi_move(present_backend_list);
721 // look at each response
722 Z_Records *z_records_diag = 0;
724 std::list<BackendPtr>::const_iterator pbit = present_backend_list.begin();
725 for (; pbit != present_backend_list.end(); pbit++)
727 PackagePtr p = (*pbit)->m_package;
729 if (p->session().is_closed()) // if any backend closes, close frontend
730 package.session().close();
732 Z_GDU *gdu = p->response().get();
733 if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
734 Z_APDU_presentResponse)
736 Z_APDU *b_apdu = gdu->u.z3950;
737 Z_PresentResponse *b_resp = b_apdu->u.presentResponse;
739 // see we get any errors (AKA diagnstics)
742 if (b_resp->records->which != Z_Records_DBOSD)
743 z_records_diag = b_resp->records;
744 // we may set this multiple times (TOO BAD!)
749 // if any target does not return present response - return that
750 package.response() = p->response();
756 Z_APDU *f_apdu = odr.create_presentResponse(apdu_req, 0, 0);
757 Z_PresentResponse *f_resp = f_apdu->u.presentResponse;
761 f_resp->records = z_records_diag;
762 *f_resp->presentStatus = Z_PresentStatus_failure;
766 f_resp->records = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
767 Z_Records * records = f_resp->records;
768 records->which = Z_Records_DBOSD;
769 records->u.databaseOrSurDiagnostics =
770 (Z_NamePlusRecordList *)
771 odr_malloc(odr, sizeof(Z_NamePlusRecordList));
772 Z_NamePlusRecordList *nprl = records->u.databaseOrSurDiagnostics;
773 nprl->num_records = jobs.size();
774 nprl->records = (Z_NamePlusRecord**)
775 odr_malloc(odr, sizeof(Z_NamePlusRecord *) * nprl->num_records);
777 std::list<Multi::FrontendSet::PresentJob>::const_iterator jit;
778 for (jit = jobs.begin(); jit != jobs.end(); jit++, i++)
780 PackagePtr p = jit->m_backend->m_package;
782 Z_GDU *gdu = p->response().get();
783 Z_APDU *b_apdu = gdu->u.z3950;
784 Z_PresentResponse *b_resp = b_apdu->u.presentResponse;
786 nprl->records[i] = (Z_NamePlusRecord*)
787 odr_malloc(odr, sizeof(Z_NamePlusRecord));
788 int inside_pos = jit->m_pos - jit->m_start;
789 if (inside_pos >= b_resp->records->
790 u.databaseOrSurDiagnostics->num_records)
792 *nprl->records[i] = *b_resp->records->
793 u.databaseOrSurDiagnostics->records[inside_pos];
794 nprl->records[i]->databaseName =
795 odr_strdup(odr, jit->m_backend->m_vhost.c_str());
797 nprl->num_records = i; // usually same as jobs.size();
798 *f_resp->nextResultSetPosition = start + i;
799 *f_resp->numberOfRecordsReturned = i;
801 package.response() = f_apdu;
804 void yf::Multi::Frontend::scan1(mp::Package &package, Z_APDU *apdu_req)
806 if (m_backend_list.size() > 1)
810 odr.create_scanResponse(
811 apdu_req, YAZ_BIB1_COMBI_OF_SPECIFIED_DATABASES_UNSUPP, 0);
812 package.response() = f_apdu;
815 Z_ScanRequest *req = apdu_req->u.scanRequest;
817 int default_num_db = req->num_databaseNames;
818 char **default_db = req->databaseNames;
820 std::list<BackendPtr>::const_iterator bit;
821 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); bit++)
823 PackagePtr p = (*bit)->m_package;
826 if (!mp::util::set_databases_from_zurl(odr, (*bit)->m_vhost,
827 &req->num_databaseNames,
828 &req->databaseNames))
830 req->num_databaseNames = default_num_db;
831 req->databaseNames = default_db;
833 p->request() = apdu_req;
834 p->copy_filter(package);
836 multi_move(m_backend_list);
838 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); bit++)
840 PackagePtr p = (*bit)->m_package;
842 if (p->session().is_closed()) // if any backend closes, close frontend
843 package.session().close();
845 Z_GDU *gdu = p->response().get();
846 if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
849 package.response() = p->response();
854 // if any target does not return scan response - return that
855 package.response() = p->response();
861 bool yf::Multi::ScanTermInfo::operator < (const ScanTermInfo &k) const
863 return m_norm_term < k.m_norm_term;
866 bool yf::Multi::ScanTermInfo::operator == (const ScanTermInfo &k) const
868 return m_norm_term == k.m_norm_term;
871 Z_Entry *yf::Multi::ScanTermInfo::get_entry(ODR odr)
873 Z_Entry *e = (Z_Entry *)odr_malloc(odr, sizeof(*e));
874 e->which = Z_Entry_termInfo;
876 t = e->u.termInfo = (Z_TermInfo *) odr_malloc(odr, sizeof(*t));
877 t->suggestedAttributes = 0;
879 t->alternativeTerm = 0;
881 t->otherTermInfo = 0;
882 t->globalOccurrences = odr_intdup(odr, m_count);
884 odr_malloc(odr, sizeof(*t->term));
885 t->term->which = Z_Term_general;
887 t->term->u.general = o = (Odr_oct *)odr_malloc(odr, sizeof(Odr_oct));
889 o->len = o->size = m_norm_term.size();
890 o->buf = (unsigned char *) odr_malloc(odr, o->len);
891 memcpy(o->buf, m_norm_term.c_str(), o->len);
895 void yf::Multi::Frontend::scan2(mp::Package &package, Z_APDU *apdu_req)
897 Z_ScanRequest *req = apdu_req->u.scanRequest;
899 int default_num_db = req->num_databaseNames;
900 char **default_db = req->databaseNames;
902 std::list<BackendPtr>::const_iterator bit;
903 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); bit++)
905 PackagePtr p = (*bit)->m_package;
908 if (!mp::util::set_databases_from_zurl(odr, (*bit)->m_vhost,
909 &req->num_databaseNames,
910 &req->databaseNames))
912 req->num_databaseNames = default_num_db;
913 req->databaseNames = default_db;
915 p->request() = apdu_req;
916 p->copy_filter(package);
918 multi_move(m_backend_list);
920 ScanTermInfoList entries_before;
921 ScanTermInfoList entries_after;
925 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); bit++)
927 PackagePtr p = (*bit)->m_package;
929 if (p->session().is_closed()) // if any backend closes, close frontend
930 package.session().close();
932 Z_GDU *gdu = p->response().get();
933 if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
936 Z_ScanResponse *res = gdu->u.z3950->u.scanResponse;
938 if (res->entries && res->entries->nonsurrogateDiagnostics)
942 Z_APDU *f_apdu = odr.create_scanResponse(apdu_req, 1, 0);
943 Z_ScanResponse *f_res = f_apdu->u.scanResponse;
945 f_res->entries->nonsurrogateDiagnostics =
946 res->entries->nonsurrogateDiagnostics;
947 f_res->entries->num_nonsurrogateDiagnostics =
948 res->entries->num_nonsurrogateDiagnostics;
950 package.response() = f_apdu;
954 if (res->entries && res->entries->entries)
956 Z_Entry **entries = res->entries->entries;
957 int num_entries = res->entries->num_entries;
959 if (req->preferredPositionInResponse)
960 position = *req->preferredPositionInResponse;
961 if (res->positionOfTerm)
962 position = *res->positionOfTerm;
966 for (i = 0; i<position-1 && i<num_entries; i++)
968 Z_Entry *ent = entries[i];
970 if (ent->which == Z_Entry_termInfo)
974 int *occur = ent->u.termInfo->globalOccurrences;
975 my.m_count = occur ? *occur : 0;
977 if (ent->u.termInfo->term->which == Z_Term_general)
979 my.m_norm_term = std::string(
981 ent->u.termInfo->term->u.general->buf,
982 ent->u.termInfo->term->u.general->len);
984 if (my.m_norm_term.length())
986 ScanTermInfoList::iterator it =
987 entries_before.begin();
988 while (it != entries_before.end() && my <*it)
992 it->m_count += my.m_count;
996 entries_before.insert(it, my);
1007 for ( ; i<num_entries; i++)
1009 Z_Entry *ent = entries[i];
1011 if (ent->which == Z_Entry_termInfo)
1015 int *occur = ent->u.termInfo->globalOccurrences;
1016 my.m_count = occur ? *occur : 0;
1018 if (ent->u.termInfo->term->which == Z_Term_general)
1020 my.m_norm_term = std::string(
1022 ent->u.termInfo->term->u.general->buf,
1023 ent->u.termInfo->term->u.general->len);
1025 if (my.m_norm_term.length())
1027 ScanTermInfoList::iterator it =
1028 entries_after.begin();
1029 while (it != entries_after.end() && *it < my)
1033 it->m_count += my.m_count;
1037 entries_after.insert(it, my);
1048 // if any target does not return scan response - return that
1049 package.response() = p->response();
1056 std::cout << "BEFORE\n";
1057 ScanTermInfoList::iterator it = entries_before.begin();
1058 for(; it != entries_before.end(); it++)
1060 std::cout << " " << it->m_norm_term << " " << it->m_count << "\n";
1063 std::cout << "AFTER\n";
1064 it = entries_after.begin();
1065 for(; it != entries_after.end(); it++)
1067 std::cout << " " << it->m_norm_term << " " << it->m_count << "\n";
1074 Z_APDU *f_apdu = odr.create_scanResponse(apdu_req, 1, "not implemented");
1075 package.response() = f_apdu;
1080 Z_APDU *f_apdu = odr.create_scanResponse(apdu_req, 0, 0);
1081 Z_ScanResponse *resp = f_apdu->u.scanResponse;
1083 int number_returned = *req->numberOfTermsRequested;
1084 int position_returned = *req->preferredPositionInResponse;
1086 resp->entries->num_entries = number_returned;
1087 resp->entries->entries = (Z_Entry**)
1088 odr_malloc(odr, sizeof(Z_Entry*) * number_returned);
1091 int lbefore = entries_before.size();
1092 if (lbefore < position_returned-1)
1093 position_returned = lbefore+1;
1095 ScanTermInfoList::iterator it = entries_before.begin();
1096 for (i = 0; i<position_returned-1 && it != entries_before.end(); i++, it++)
1098 resp->entries->entries[position_returned-2-i] = it->get_entry(odr);
1101 it = entries_after.begin();
1103 if (position_returned <= 0)
1106 i = position_returned-1;
1107 for (; i<number_returned && it != entries_after.end(); i++, it++)
1109 resp->entries->entries[i] = it->get_entry(odr);
1112 number_returned = i;
1114 resp->positionOfTerm = odr_intdup(odr, position_returned);
1115 resp->numberOfEntriesReturned = odr_intdup(odr, number_returned);
1116 resp->entries->num_entries = number_returned;
1118 package.response() = f_apdu;
1123 void yf::Multi::process(mp::Package &package) const
1125 FrontendPtr f = m_p->get_frontend(package);
1127 Z_GDU *gdu = package.request().get();
1129 if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
1130 Z_APDU_initRequest && !f->m_is_multi)
1132 f->init(package, gdu);
1134 else if (!f->m_is_multi)
1136 else if (gdu && gdu->which == Z_GDU_Z3950)
1138 Z_APDU *apdu = gdu->u.z3950;
1139 if (apdu->which == Z_APDU_initRequest)
1143 package.response() = odr.create_close(
1145 Z_Close_protocolError,
1148 package.session().close();
1150 else if (apdu->which == Z_APDU_searchRequest)
1152 f->search(package, apdu);
1154 else if (apdu->which == Z_APDU_presentRequest)
1156 f->present(package, apdu);
1158 else if (apdu->which == Z_APDU_scanRequest)
1160 f->scan2(package, apdu);
1166 package.response() = odr.create_close(
1167 apdu, Z_Close_protocolError,
1168 "unsupported APDU in filter multi");
1170 package.session().close();
1173 m_p->release_frontend(package);
1176 void mp::filter::Multi::configure(const xmlNode * ptr, bool test_only)
1178 for (ptr = ptr->children; ptr; ptr = ptr->next)
1180 if (ptr->type != XML_ELEMENT_NODE)
1182 if (!strcmp((const char *) ptr->name, "target"))
1184 std::string route = mp::xml::get_route(ptr);
1185 std::string target = mp::xml::get_text(ptr);
1186 std::cout << "route=" << route << " target=" << target << "\n";
1187 m_p->m_target_route[target] = route;
1189 else if (!strcmp((const char *) ptr->name, "hideunavailable"))
1191 m_p->m_hide_unavailable = true;
1193 else if (!strcmp((const char *) ptr->name, "mergetype"))
1195 std::string mergetype = mp::xml::get_text(ptr);
1196 if (mergetype == "roundrobin")
1197 m_p->m_merge_type = round_robin;
1198 else if (mergetype == "serveorder")
1199 m_p->m_merge_type = serve_order;
1201 throw mp::filter::FilterException
1202 ("Bad mergetype " + mergetype + " in multi filter");
1207 throw mp::filter::FilterException
1209 + std::string((const char *) ptr->name)
1210 + " in multi filter");
1215 static mp::filter::Base* filter_creator()
1217 return new mp::filter::Multi;
1221 struct metaproxy_1_filter_struct metaproxy_1_filter_multi = {
1232 * indent-tabs-mode: nil
1233 * c-file-style: "stroustrup"
1235 * vim: shiftwidth=4 tabstop=8 expandtab