1 /* $Id: filter_multi.cpp,v 1.28 2007-11-18 10:44:40 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 {
75 FrontendSet(std::string setname);
79 void round_robin(int pos, int number, std::list<PresentJob> &job);
80 void serve_order(int pos, int number, std::list<PresentJob> &job);
82 std::list<BackendSet> m_backend_sets;
83 std::string m_setname;
85 struct Multi::Backend {
87 std::string m_backend_database;
90 void operator() (void); // thread operation
92 struct Multi::Frontend {
97 std::list<BackendPtr> m_backend_list;
98 std::map<std::string,Multi::FrontendSet> m_sets;
100 void multi_move(std::list<BackendPtr> &blist);
101 void init(Package &package, Z_GDU *gdu);
102 void close(Package &package);
103 void search(Package &package, Z_APDU *apdu);
104 void present(Package &package, Z_APDU *apdu);
105 void scan1(Package &package, Z_APDU *apdu);
106 void scan2(Package &package, Z_APDU *apdu);
110 Map(std::list<std::string> hosts, std::string route);
112 std::list<std::string> m_hosts;
117 friend struct Frontend;
120 FrontendPtr get_frontend(Package &package);
121 void release_frontend(Package &package);
123 std::map<std::string,std::string> m_target_route;
124 boost::mutex m_mutex;
125 boost::condition m_cond_session_ready;
126 std::map<mp::Session, FrontendPtr> m_clients;
127 bool m_hide_unavailable;
128 multi_merge_type m_merge_type;
133 yf::Multi::Rep::Rep()
135 m_hide_unavailable = false;
136 m_merge_type = round_robin;
139 bool yf::Multi::BackendSet::operator < (const BackendSet &k) const
141 return m_count < k.m_count;
144 yf::Multi::Frontend::Frontend(Rep *rep)
150 yf::Multi::Frontend::~Frontend()
154 yf::Multi::FrontendPtr yf::Multi::Rep::get_frontend(mp::Package &package)
156 boost::mutex::scoped_lock lock(m_mutex);
158 std::map<mp::Session,yf::Multi::FrontendPtr>::iterator it;
162 it = m_clients.find(package.session());
163 if (it == m_clients.end())
166 if (!it->second->m_in_use)
168 it->second->m_in_use = true;
171 m_cond_session_ready.wait(lock);
173 FrontendPtr f(new Frontend(this));
174 m_clients[package.session()] = f;
179 void yf::Multi::Rep::release_frontend(mp::Package &package)
181 boost::mutex::scoped_lock lock(m_mutex);
182 std::map<mp::Session,yf::Multi::FrontendPtr>::iterator it;
184 it = m_clients.find(package.session());
185 if (it != m_clients.end())
187 if (package.session().is_closed())
189 it->second->close(package);
194 it->second->m_in_use = false;
196 m_cond_session_ready.notify_all();
200 yf::Multi::FrontendSet::FrontendSet(std::string setname)
206 yf::Multi::FrontendSet::FrontendSet()
211 yf::Multi::FrontendSet::~FrontendSet()
215 yf::Multi::Map::Map(std::list<std::string> hosts, std::string route)
216 : m_hosts(hosts), m_route(route)
220 yf::Multi::Map::Map()
224 yf::Multi::Multi() : m_p(new Multi::Rep)
228 yf::Multi::~Multi() {
232 void yf::Multi::Backend::operator() (void)
234 m_package->move(m_route);
238 void yf::Multi::Frontend::close(mp::Package &package)
240 std::list<BackendPtr>::const_iterator bit;
241 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); bit++)
245 b->m_package->copy_filter(package);
246 b->m_package->request() = (Z_GDU *) 0;
247 b->m_package->session().close();
248 b->m_package->move(b->m_route);
252 void yf::Multi::Frontend::multi_move(std::list<BackendPtr> &blist)
254 std::list<BackendPtr>::const_iterator bit;
255 boost::thread_group g;
256 for (bit = blist.begin(); bit != blist.end(); bit++)
258 g.add_thread(new boost::thread(**bit));
263 void yf::Multi::FrontendSet::serve_order(int start, int number,
264 std::list<PresentJob> &jobs)
267 for (i = 0; i < number; i++)
269 std::list<BackendSet>::const_iterator bsit;
271 int offset = start + i - 1;
272 for (bsit = m_backend_sets.begin(); bsit != m_backend_sets.end();
275 if (offset >= voffset && offset < voffset + bsit->m_count)
278 job.m_backend = bsit->m_backend;
279 job.m_inside_pos = 0;
280 job.m_pos = 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<int> inside_pos;
294 std::list<BackendSet>::const_iterator bsit;
295 for (bsit = m_backend_sets.begin(); bsit != m_backend_sets.end(); bsit++)
298 inside_pos.push_back(0);
303 // optimization step!
309 // find min count for each set which is > omin
310 for (bsit = m_backend_sets.begin(); bsit != m_backend_sets.end(); bsit++)
312 if (bsit->m_count > omin)
314 if (no_left == 0 || bsit->m_count < min)
319 if (no_left == 0) // if nothing greater than omin, bail out.
321 int skip = no_left * min;
322 if (p + skip > start) // step gets us "into" present range?
324 // Yes. skip until start.. Rounding off is deliberate!
325 min = (start-p) / no_left;
328 // update positions in each set..
329 std::list<int>::iterator psit = pos.begin();
330 for (psit = pos.begin(); psit != pos.end(); psit++)
334 // skip on each set.. before "present range"..
337 std::cout << "\nSKIP min=" << min << " no_left=" << no_left << "\n\n";
339 std::list<int>::iterator psit = pos.begin();
340 for (psit = pos.begin(); psit != pos.end(); psit++)
343 omin = min; // update so we consider next class (with higher count)
351 std::list<int>::iterator psit = pos.begin();
352 std::list<int>::iterator esit = inside_pos.begin();
353 bsit = m_backend_sets.begin();
355 for (; bsit != m_backend_sets.end(); psit++,esit++,bsit++)
357 if (fetched >= number)
362 if (*psit <= bsit->m_count)
367 job.m_backend = bsit->m_backend;
369 job.m_inside_pos = *esit;
382 void yf::Multi::Frontend::init(mp::Package &package, Z_GDU *gdu)
384 Z_InitRequest *req = gdu->u.z3950->u.initRequest;
386 std::list<std::string> targets;
388 mp::util::get_vhost_otherinfo(req->otherInfo, targets);
390 if (targets.size() < 1)
396 std::list<std::string>::const_iterator t_it = targets.begin();
397 for (; t_it != targets.end(); t_it++)
400 Backend *b = new Backend;
403 b->m_route = m_p->m_target_route[*t_it];
405 b->m_package = PackagePtr(new Package(s, package.origin()));
407 m_backend_list.push_back(BackendPtr(b));
411 // create init request
412 std::list<BackendPtr>::iterator bit;
413 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); bit++)
417 Z_APDU *init_apdu = zget_APDU(odr, Z_APDU_initRequest);
419 std::list<std::string>vhost_one;
420 vhost_one.push_back(b->m_vhost);
421 mp::util::set_vhost_otherinfo(&init_apdu->u.initRequest->otherInfo,
424 Z_InitRequest *req = init_apdu->u.initRequest;
426 ODR_MASK_SET(req->options, Z_Options_search);
427 ODR_MASK_SET(req->options, Z_Options_present);
428 ODR_MASK_SET(req->options, Z_Options_namedResultSets);
429 ODR_MASK_SET(req->options, Z_Options_scan);
431 ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_1);
432 ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_2);
433 ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_3);
435 b->m_package->request() = init_apdu;
437 b->m_package->copy_filter(package);
439 multi_move(m_backend_list);
441 // create the frontend init response based on each backend init response
444 Z_APDU *f_apdu = odr.create_initResponse(gdu->u.z3950, 0, 0);
445 Z_InitResponse *f_resp = f_apdu->u.initResponse;
447 ODR_MASK_SET(f_resp->options, Z_Options_search);
448 ODR_MASK_SET(f_resp->options, Z_Options_present);
449 ODR_MASK_SET(f_resp->options, Z_Options_namedResultSets);
451 ODR_MASK_SET(f_resp->protocolVersion, Z_ProtocolVersion_1);
452 ODR_MASK_SET(f_resp->protocolVersion, Z_ProtocolVersion_2);
453 ODR_MASK_SET(f_resp->protocolVersion, Z_ProtocolVersion_3);
456 int no_succeeded = 0;
457 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); )
459 PackagePtr p = (*bit)->m_package;
461 if (p->session().is_closed())
463 // failed. Remove from list and increment number of failed
465 bit = m_backend_list.erase(bit);
470 Z_GDU *gdu = p->response().get();
471 if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
475 Z_APDU *b_apdu = gdu->u.z3950;
476 Z_InitResponse *b_resp = b_apdu->u.initResponse;
478 // common options for all backends
479 for (i = 0; i <= Z_Options_stringSchema; i++)
481 if (!ODR_MASK_GET(b_resp->options, i))
482 ODR_MASK_CLEAR(f_resp->options, i);
484 // common protocol version
485 for (i = 0; i <= Z_ProtocolVersion_3; i++)
486 if (!ODR_MASK_GET(b_resp->protocolVersion, i))
487 ODR_MASK_CLEAR(f_resp->protocolVersion, i);
488 // reject if any of the backends reject
489 if (!*b_resp->result)
494 // if any target does not return init return that (close or
496 package.response() = p->response();
501 if (m_p->m_hide_unavailable)
503 if (no_succeeded == 0)
504 package.session().close();
509 package.session().close();
511 package.response() = f_apdu;
514 void yf::Multi::Frontend::search(mp::Package &package, Z_APDU *apdu_req)
516 // create search request
517 Z_SearchRequest *req = apdu_req->u.searchRequest;
519 // save these for later
520 int smallSetUpperBound = *req->smallSetUpperBound;
521 int largeSetLowerBound = *req->largeSetLowerBound;
522 int mediumSetPresentNumber = *req->mediumSetPresentNumber;
524 // they are altered now - to disable piggyback
525 *req->smallSetUpperBound = 0;
526 *req->largeSetLowerBound = 1;
527 *req->mediumSetPresentNumber = 1;
529 int default_num_db = req->num_databaseNames;
530 char **default_db = req->databaseNames;
532 std::list<BackendPtr>::const_iterator bit;
533 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); bit++)
535 PackagePtr p = (*bit)->m_package;
538 if (!mp::util::set_databases_from_zurl(odr, (*bit)->m_vhost,
539 &req->num_databaseNames,
540 &req->databaseNames))
542 req->num_databaseNames = default_num_db;
543 req->databaseNames = default_db;
545 p->request() = apdu_req;
546 p->copy_filter(package);
548 multi_move(m_backend_list);
550 // look at each response
551 FrontendSet resultSet(std::string(req->resultSetName));
553 int result_set_size = 0;
554 Z_Records *z_records_diag = 0; // no diagnostics (yet)
555 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); bit++)
557 PackagePtr p = (*bit)->m_package;
559 if (p->session().is_closed()) // if any backend closes, close frontend
560 package.session().close();
562 Z_GDU *gdu = p->response().get();
563 if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
564 Z_APDU_searchResponse)
566 Z_APDU *b_apdu = gdu->u.z3950;
567 Z_SearchResponse *b_resp = b_apdu->u.searchResponse;
569 // see we get any errors (AKA diagnstics)
572 if (b_resp->records->which == Z_Records_NSD
573 || b_resp->records->which == Z_Records_multipleNSD)
574 z_records_diag = b_resp->records;
575 // we may set this multiple times (TOO BAD!)
577 BackendSet backendSet;
578 backendSet.m_backend = *bit;
579 backendSet.m_count = *b_resp->resultCount;
580 result_set_size += *b_resp->resultCount;
581 resultSet.m_backend_sets.push_back(backendSet);
585 // if any target does not return search response - return that
586 package.response() = p->response();
592 Z_APDU *f_apdu = odr.create_searchResponse(apdu_req, 0, 0);
593 Z_SearchResponse *f_resp = f_apdu->u.searchResponse;
595 *f_resp->resultCount = result_set_size;
599 f_resp->records = z_records_diag;
600 package.response() = f_apdu;
604 m_sets[resultSet.m_setname] = resultSet;
607 mp::util::piggyback(smallSetUpperBound,
609 mediumSetPresentNumber,
612 Package pp(package.session(), package.origin());
615 pp.copy_filter(package);
616 Z_APDU *p_apdu = zget_APDU(odr, Z_APDU_presentRequest);
617 Z_PresentRequest *p_req = p_apdu->u.presentRequest;
618 p_req->preferredRecordSyntax = req->preferredRecordSyntax;
619 p_req->resultSetId = req->resultSetName;
620 *p_req->resultSetStartPoint = 1;
621 *p_req->numberOfRecordsRequested = number;
622 pp.request() = p_apdu;
625 if (pp.session().is_closed())
626 package.session().close();
628 Z_GDU *gdu = pp.response().get();
629 if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
630 Z_APDU_presentResponse)
632 Z_PresentResponse *p_res = gdu->u.z3950->u.presentResponse;
633 f_resp->records = p_res->records;
634 *f_resp->numberOfRecordsReturned =
635 *p_res->numberOfRecordsReturned;
636 *f_resp->nextResultSetPosition =
637 *p_res->nextResultSetPosition;
641 package.response() = pp.response();
645 package.response() = f_apdu; // in this scope because of p
648 void yf::Multi::Frontend::present(mp::Package &package, Z_APDU *apdu_req)
650 // create present request
651 Z_PresentRequest *req = apdu_req->u.presentRequest;
654 it = m_sets.find(std::string(req->resultSetId));
655 if (it == m_sets.end())
659 odr.create_presentResponse(
661 YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST,
663 package.response() = apdu;
666 std::list<Multi::FrontendSet::PresentJob> jobs;
667 int start = *req->resultSetStartPoint;
668 int number = *req->numberOfRecordsRequested;
670 if (m_p->m_merge_type == round_robin)
671 it->second.round_robin(start, number, jobs);
672 else if (m_p->m_merge_type == serve_order)
673 it->second.serve_order(start, number, jobs);
677 std::list<Multi::FrontendSet::PresentJob>::const_iterator jit;
678 for (jit = jobs.begin(); jit != jobs.end(); jit++)
680 yaz_log(YLOG_LOG, "job pos=%d inside_pos=%d",
681 jit->m_pos, jit->m_inside_pos);
685 std::list<BackendPtr> present_backend_list;
687 std::list<BackendSet>::const_iterator bsit;
688 bsit = it->second.m_backend_sets.begin();
689 for (; bsit != it->second.m_backend_sets.end(); bsit++)
691 std::list<Multi::FrontendSet::PresentJob>::const_iterator jit;
695 for (jit = jobs.begin(); jit != jobs.end(); jit++)
697 if (jit->m_backend == bsit->m_backend)
699 if (start == -1 || jit->m_pos < start)
701 if (end == -1 || jit->m_pos > end)
707 PackagePtr p = bsit->m_backend->m_package;
709 *req->resultSetStartPoint = start;
710 *req->numberOfRecordsRequested = end - start + 1;
712 p->request() = apdu_req;
713 p->copy_filter(package);
715 present_backend_list.push_back(bsit->m_backend);
718 multi_move(present_backend_list);
720 // look at each response
721 Z_Records *z_records_diag = 0;
723 std::list<BackendPtr>::const_iterator pbit = present_backend_list.begin();
724 for (; pbit != present_backend_list.end(); pbit++)
726 PackagePtr p = (*pbit)->m_package;
728 if (p->session().is_closed()) // if any backend closes, close frontend
729 package.session().close();
731 Z_GDU *gdu = p->response().get();
732 if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
733 Z_APDU_presentResponse)
735 Z_APDU *b_apdu = gdu->u.z3950;
736 Z_PresentResponse *b_resp = b_apdu->u.presentResponse;
738 // see we get any errors (AKA diagnstics)
741 if (b_resp->records->which != Z_Records_DBOSD)
742 z_records_diag = b_resp->records;
743 // we may set this multiple times (TOO BAD!)
748 // if any target does not return present response - return that
749 package.response() = p->response();
755 Z_APDU *f_apdu = odr.create_presentResponse(apdu_req, 0, 0);
756 Z_PresentResponse *f_resp = f_apdu->u.presentResponse;
760 f_resp->records = z_records_diag;
761 *f_resp->presentStatus = Z_PresentStatus_failure;
765 f_resp->records = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
766 Z_Records * records = f_resp->records;
767 records->which = Z_Records_DBOSD;
768 records->u.databaseOrSurDiagnostics =
769 (Z_NamePlusRecordList *)
770 odr_malloc(odr, sizeof(Z_NamePlusRecordList));
771 Z_NamePlusRecordList *nprl = records->u.databaseOrSurDiagnostics;
772 nprl->num_records = jobs.size();
773 nprl->records = (Z_NamePlusRecord**)
774 odr_malloc(odr, sizeof(Z_NamePlusRecord *) * nprl->num_records);
776 std::list<Multi::FrontendSet::PresentJob>::const_iterator jit;
777 for (jit = jobs.begin(); jit != jobs.end(); jit++, i++)
779 PackagePtr p = jit->m_backend->m_package;
781 Z_GDU *gdu = p->response().get();
782 Z_APDU *b_apdu = gdu->u.z3950;
783 Z_PresentResponse *b_resp = b_apdu->u.presentResponse;
785 nprl->records[i] = (Z_NamePlusRecord*)
786 odr_malloc(odr, sizeof(Z_NamePlusRecord));
787 int inside_pos = jit->m_inside_pos;
788 if (inside_pos >= b_resp->records->
789 u.databaseOrSurDiagnostics->num_records)
791 *nprl->records[i] = *b_resp->records->
792 u.databaseOrSurDiagnostics->records[inside_pos];
793 nprl->records[i]->databaseName =
794 odr_strdup(odr, jit->m_backend->m_vhost.c_str());
796 nprl->num_records = i; // usually same as jobs.size();
797 *f_resp->nextResultSetPosition = start + i;
798 *f_resp->numberOfRecordsReturned = i;
800 package.response() = f_apdu;
803 void yf::Multi::Frontend::scan1(mp::Package &package, Z_APDU *apdu_req)
805 if (m_backend_list.size() > 1)
809 odr.create_scanResponse(
810 apdu_req, YAZ_BIB1_COMBI_OF_SPECIFIED_DATABASES_UNSUPP, 0);
811 package.response() = f_apdu;
814 Z_ScanRequest *req = apdu_req->u.scanRequest;
816 int default_num_db = req->num_databaseNames;
817 char **default_db = req->databaseNames;
819 std::list<BackendPtr>::const_iterator bit;
820 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); bit++)
822 PackagePtr p = (*bit)->m_package;
825 if (!mp::util::set_databases_from_zurl(odr, (*bit)->m_vhost,
826 &req->num_databaseNames,
827 &req->databaseNames))
829 req->num_databaseNames = default_num_db;
830 req->databaseNames = default_db;
832 p->request() = apdu_req;
833 p->copy_filter(package);
835 multi_move(m_backend_list);
837 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); bit++)
839 PackagePtr p = (*bit)->m_package;
841 if (p->session().is_closed()) // if any backend closes, close frontend
842 package.session().close();
844 Z_GDU *gdu = p->response().get();
845 if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
848 package.response() = p->response();
853 // if any target does not return scan response - return that
854 package.response() = p->response();
860 bool yf::Multi::ScanTermInfo::operator < (const ScanTermInfo &k) const
862 return m_norm_term < k.m_norm_term;
865 bool yf::Multi::ScanTermInfo::operator == (const ScanTermInfo &k) const
867 return m_norm_term == k.m_norm_term;
870 Z_Entry *yf::Multi::ScanTermInfo::get_entry(ODR odr)
872 Z_Entry *e = (Z_Entry *)odr_malloc(odr, sizeof(*e));
873 e->which = Z_Entry_termInfo;
875 t = e->u.termInfo = (Z_TermInfo *) odr_malloc(odr, sizeof(*t));
876 t->suggestedAttributes = 0;
878 t->alternativeTerm = 0;
880 t->otherTermInfo = 0;
881 t->globalOccurrences = odr_intdup(odr, m_count);
883 odr_malloc(odr, sizeof(*t->term));
884 t->term->which = Z_Term_general;
886 t->term->u.general = o = (Odr_oct *)odr_malloc(odr, sizeof(Odr_oct));
888 o->len = o->size = m_norm_term.size();
889 o->buf = (unsigned char *) odr_malloc(odr, o->len);
890 memcpy(o->buf, m_norm_term.c_str(), o->len);
894 void yf::Multi::Frontend::scan2(mp::Package &package, Z_APDU *apdu_req)
896 Z_ScanRequest *req = apdu_req->u.scanRequest;
898 int default_num_db = req->num_databaseNames;
899 char **default_db = req->databaseNames;
901 std::list<BackendPtr>::const_iterator bit;
902 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); bit++)
904 PackagePtr p = (*bit)->m_package;
907 if (!mp::util::set_databases_from_zurl(odr, (*bit)->m_vhost,
908 &req->num_databaseNames,
909 &req->databaseNames))
911 req->num_databaseNames = default_num_db;
912 req->databaseNames = default_db;
914 p->request() = apdu_req;
915 p->copy_filter(package);
917 multi_move(m_backend_list);
919 ScanTermInfoList entries_before;
920 ScanTermInfoList entries_after;
924 for (bit = m_backend_list.begin(); bit != m_backend_list.end(); bit++)
926 PackagePtr p = (*bit)->m_package;
928 if (p->session().is_closed()) // if any backend closes, close frontend
929 package.session().close();
931 Z_GDU *gdu = p->response().get();
932 if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
935 Z_ScanResponse *res = gdu->u.z3950->u.scanResponse;
937 if (res->entries && res->entries->nonsurrogateDiagnostics)
941 Z_APDU *f_apdu = odr.create_scanResponse(apdu_req, 1, 0);
942 Z_ScanResponse *f_res = f_apdu->u.scanResponse;
944 f_res->entries->nonsurrogateDiagnostics =
945 res->entries->nonsurrogateDiagnostics;
946 f_res->entries->num_nonsurrogateDiagnostics =
947 res->entries->num_nonsurrogateDiagnostics;
949 package.response() = f_apdu;
953 if (res->entries && res->entries->entries)
955 Z_Entry **entries = res->entries->entries;
956 int num_entries = res->entries->num_entries;
958 if (req->preferredPositionInResponse)
959 position = *req->preferredPositionInResponse;
960 if (res->positionOfTerm)
961 position = *res->positionOfTerm;
965 for (i = 0; i<position-1 && i<num_entries; i++)
967 Z_Entry *ent = entries[i];
969 if (ent->which == Z_Entry_termInfo)
973 int *occur = ent->u.termInfo->globalOccurrences;
974 my.m_count = occur ? *occur : 0;
976 if (ent->u.termInfo->term->which == Z_Term_general)
978 my.m_norm_term = std::string(
980 ent->u.termInfo->term->u.general->buf,
981 ent->u.termInfo->term->u.general->len);
983 if (my.m_norm_term.length())
985 ScanTermInfoList::iterator it =
986 entries_before.begin();
987 while (it != entries_before.end() && my <*it)
991 it->m_count += my.m_count;
995 entries_before.insert(it, my);
1006 for ( ; i<num_entries; i++)
1008 Z_Entry *ent = entries[i];
1010 if (ent->which == Z_Entry_termInfo)
1014 int *occur = ent->u.termInfo->globalOccurrences;
1015 my.m_count = occur ? *occur : 0;
1017 if (ent->u.termInfo->term->which == Z_Term_general)
1019 my.m_norm_term = std::string(
1021 ent->u.termInfo->term->u.general->buf,
1022 ent->u.termInfo->term->u.general->len);
1024 if (my.m_norm_term.length())
1026 ScanTermInfoList::iterator it =
1027 entries_after.begin();
1028 while (it != entries_after.end() && *it < my)
1032 it->m_count += my.m_count;
1036 entries_after.insert(it, my);
1047 // if any target does not return scan response - return that
1048 package.response() = p->response();
1055 std::cout << "BEFORE\n";
1056 ScanTermInfoList::iterator it = entries_before.begin();
1057 for(; it != entries_before.end(); it++)
1059 std::cout << " " << it->m_norm_term << " " << it->m_count << "\n";
1062 std::cout << "AFTER\n";
1063 it = entries_after.begin();
1064 for(; it != entries_after.end(); it++)
1066 std::cout << " " << it->m_norm_term << " " << it->m_count << "\n";
1073 Z_APDU *f_apdu = odr.create_scanResponse(apdu_req, 1, "not implemented");
1074 package.response() = f_apdu;
1079 Z_APDU *f_apdu = odr.create_scanResponse(apdu_req, 0, 0);
1080 Z_ScanResponse *resp = f_apdu->u.scanResponse;
1082 int number_returned = *req->numberOfTermsRequested;
1083 int position_returned = *req->preferredPositionInResponse;
1085 resp->entries->num_entries = number_returned;
1086 resp->entries->entries = (Z_Entry**)
1087 odr_malloc(odr, sizeof(Z_Entry*) * number_returned);
1090 int lbefore = entries_before.size();
1091 if (lbefore < position_returned-1)
1092 position_returned = lbefore+1;
1094 ScanTermInfoList::iterator it = entries_before.begin();
1095 for (i = 0; i<position_returned-1 && it != entries_before.end(); i++, it++)
1097 resp->entries->entries[position_returned-2-i] = it->get_entry(odr);
1100 it = entries_after.begin();
1102 if (position_returned <= 0)
1105 i = position_returned-1;
1106 for (; i<number_returned && it != entries_after.end(); i++, it++)
1108 resp->entries->entries[i] = it->get_entry(odr);
1111 number_returned = i;
1113 resp->positionOfTerm = odr_intdup(odr, position_returned);
1114 resp->numberOfEntriesReturned = odr_intdup(odr, number_returned);
1115 resp->entries->num_entries = number_returned;
1117 package.response() = f_apdu;
1122 void yf::Multi::process(mp::Package &package) const
1124 FrontendPtr f = m_p->get_frontend(package);
1126 Z_GDU *gdu = package.request().get();
1128 if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
1129 Z_APDU_initRequest && !f->m_is_multi)
1131 f->init(package, gdu);
1133 else if (!f->m_is_multi)
1135 else if (gdu && gdu->which == Z_GDU_Z3950)
1137 Z_APDU *apdu = gdu->u.z3950;
1138 if (apdu->which == Z_APDU_initRequest)
1142 package.response() = odr.create_close(
1144 Z_Close_protocolError,
1147 package.session().close();
1149 else if (apdu->which == Z_APDU_searchRequest)
1151 f->search(package, apdu);
1153 else if (apdu->which == Z_APDU_presentRequest)
1155 f->present(package, apdu);
1157 else if (apdu->which == Z_APDU_scanRequest)
1159 f->scan2(package, apdu);
1165 package.response() = odr.create_close(
1166 apdu, Z_Close_protocolError,
1167 "unsupported APDU in filter multi");
1169 package.session().close();
1172 m_p->release_frontend(package);
1175 void mp::filter::Multi::configure(const xmlNode * ptr)
1177 for (ptr = ptr->children; ptr; ptr = ptr->next)
1179 if (ptr->type != XML_ELEMENT_NODE)
1181 if (!strcmp((const char *) ptr->name, "target"))
1183 std::string route = mp::xml::get_route(ptr);
1184 std::string target = mp::xml::get_text(ptr);
1185 std::cout << "route=" << route << " target=" << target << "\n";
1186 m_p->m_target_route[target] = route;
1188 else if (!strcmp((const char *) ptr->name, "hideunavailable"))
1190 m_p->m_hide_unavailable = true;
1192 else if (!strcmp((const char *) ptr->name, "mergetype"))
1194 std::string mergetype = mp::xml::get_text(ptr);
1195 if (mergetype == "roundrobin")
1196 m_p->m_merge_type = round_robin;
1197 else if (mergetype == "serveorder")
1198 m_p->m_merge_type = serve_order;
1200 throw mp::filter::FilterException
1201 ("Bad mergetype " + mergetype + " in multi filter");
1206 throw mp::filter::FilterException
1208 + std::string((const char *) ptr->name)
1209 + " in multi filter");
1214 static mp::filter::Base* filter_creator()
1216 return new mp::filter::Multi;
1220 struct metaproxy_1_filter_struct metaproxy_1_filter_multi = {
1231 * indent-tabs-mode: nil
1232 * c-file-style: "stroustrup"
1234 * vim: shiftwidth=4 tabstop=8 expandtab