1 /* This file is part of Metaproxy.
2 Copyright (C) Index Data
4 Metaproxy is free software; you can redistribute it and/or modify it under
5 the terms of the GNU General Public License as published by the Free
6 Software Foundation; either version 2, or (at your option) any later
9 Metaproxy is distributed in the hope that it will be useful, but WITHOUT ANY
10 WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #include <metaproxy/filter.hpp>
22 #include <metaproxy/package.hpp>
24 #include <boost/thread/mutex.hpp>
25 #include <boost/thread/condition.hpp>
26 #include <boost/thread/thread.hpp>
27 #include <boost/thread/xtime.hpp>
28 #include <boost/shared_ptr.hpp>
29 #include <boost/format.hpp>
31 #include <metaproxy/util.hpp>
32 #include "filter_session_shared.hpp"
34 #include <yaz/copy_types.h>
37 #include <yaz/otherinfo.h>
38 #include <yaz/diagbib1.h>
39 #include <yazpp/z-query.h>
40 #include <yazpp/record-cache.h>
45 namespace mp = metaproxy_1;
46 namespace yf = metaproxy_1::filter;
48 namespace metaproxy_1 {
51 // key for session.. We'll only share sessions with same InitKey
52 class SessionShared::InitKey {
54 bool operator < (const SessionShared::InitKey &k) const;
55 InitKey(Z_InitRequest *req);
56 InitKey(const InitKey &);
59 char *m_idAuthentication_buf;
60 int m_idAuthentication_size;
61 char *m_otherInfo_buf;
65 // worker thread .. for expiry of sessions
66 class SessionShared::Worker {
68 Worker(SessionShared::Rep *rep);
69 void operator() (void);
71 SessionShared::Rep *m_p;
74 class SessionShared::BackendSet {
76 std::string m_result_set_id;
77 Databases m_databases;
78 Odr_int m_result_set_size;
79 yazpp_1::Yaz_Z_Query m_query;
80 time_t m_time_last_use;
82 yazpp_1::RecordCache m_record_cache;
84 Z_OtherInformation *additionalSearchInfoRequest;
85 Z_OtherInformation *additionalSearchInfoResponse;
86 NMEM mem_additionalSearchInfo;
88 const std::string &result_set_id,
89 const Databases &databases,
90 const yazpp_1::Yaz_Z_Query &query,
91 Z_OtherInformation *additionalSearchInfoRequest);
94 Package &frontend_package,
95 Package &search_package,
96 const Z_APDU *apdu_req,
97 const BackendInstancePtr bp,
98 Z_Records **z_records);
100 // backend connection instance
101 class SessionShared::BackendInstance {
103 friend class BackendClass;
104 friend class BackendSet;
106 mp::Session m_session;
107 BackendSetList m_sets;
110 int m_result_set_sequence;
111 time_t m_time_last_use;
112 mp::Package * m_close_package;
116 // backends of some class (all with same InitKey)
117 class SessionShared::BackendClass : boost::noncopyable {
119 friend struct Frontend;
120 bool m_named_result_sets;
121 BackendInstanceList m_backend_list;
122 BackendInstancePtr create_backend(const Package &package);
123 void remove_backend(BackendInstancePtr b);
124 BackendInstancePtr get_backend(const Package &package);
125 void use_backend(BackendInstancePtr b);
126 void release_backend(BackendInstancePtr b);
127 bool expire_instances();
128 yazpp_1::GDU m_init_request;
129 yazpp_1::GDU m_init_response;
130 boost::mutex m_mutex_backend_class;
132 time_t m_backend_set_ttl;
133 time_t m_backend_expiry_ttl;
134 size_t m_backend_set_max;
135 Odr_int m_preferredMessageSize;
136 Odr_int m_maximumRecordSize;
138 BackendClass(const yazpp_1::GDU &init_request,
142 Odr_int preferredRecordSize,
143 Odr_int maximumRecordSize);
146 // frontend result set
147 class SessionShared::FrontendSet {
148 Databases m_databases;
149 yazpp_1::Yaz_Z_Query m_query;
151 const Databases &get_databases();
152 const yazpp_1::Yaz_Z_Query &get_query();
154 const Databases &databases,
155 const yazpp_1::Yaz_Z_Query &query);
159 struct SessionShared::Frontend {
164 Z_Options m_init_options;
165 void search(Package &package, Z_APDU *apdu);
166 void present(Package &package, Z_APDU *apdu);
167 void scan(Package &package, Z_APDU *apdu);
169 int result_set_ref(ODR o,
170 const Databases &databases,
171 Z_RPNStructure *s, std::string &rset);
172 void get_set(mp::Package &package,
173 const Z_APDU *apdu_req,
174 const Databases &databases,
175 yazpp_1::Yaz_Z_Query &query,
176 BackendInstancePtr &found_backend,
177 BackendSetPtr &found_set);
178 void override_set(BackendInstancePtr &found_backend,
179 std::string &result_set_id,
180 const Databases &databases,
181 bool out_of_sessions);
184 BackendClassPtr m_backend_class;
185 FrontendSets m_frontend_sets;
188 class SessionShared::Rep {
189 friend class SessionShared;
190 friend struct Frontend;
192 FrontendPtr get_frontend(Package &package);
193 void release_frontend(Package &package);
198 void expire_classes();
200 void init(Package &package, const Z_GDU *gdu,
201 FrontendPtr frontend);
203 boost::mutex m_mutex;
204 boost::condition m_cond_session_ready;
205 std::map<mp::Session, FrontendPtr> m_clients;
207 BackendClassMap m_backend_map;
208 boost::mutex m_mutex_backend_map;
209 boost::thread_group m_thrds;
213 bool m_optimize_search;
216 Odr_int m_preferredMessageSize;
217 Odr_int m_maximumRecordSize;
222 yf::SessionShared::FrontendSet::FrontendSet(
223 const Databases &databases,
224 const yazpp_1::Yaz_Z_Query &query)
225 : m_databases(databases), m_query(query)
229 const yf::SessionShared::Databases &
230 yf::SessionShared::FrontendSet::get_databases()
235 const yazpp_1::Yaz_Z_Query& yf::SessionShared::FrontendSet::get_query()
240 yf::SessionShared::InitKey::InitKey(const InitKey &k)
242 m_odr = odr_createmem(ODR_ENCODE);
244 m_idAuthentication_size = k.m_idAuthentication_size;
245 m_idAuthentication_buf = (char*)odr_malloc(m_odr, m_idAuthentication_size);
246 memcpy(m_idAuthentication_buf, k.m_idAuthentication_buf,
247 m_idAuthentication_size);
249 m_otherInfo_size = k.m_otherInfo_size;
250 m_otherInfo_buf = (char*)odr_malloc(m_odr, m_otherInfo_size);
251 memcpy(m_otherInfo_buf, k.m_otherInfo_buf,
255 yf::SessionShared::InitKey::InitKey(Z_InitRequest *req)
257 m_odr = odr_createmem(ODR_ENCODE);
259 Z_IdAuthentication *t = req->idAuthentication;
260 z_IdAuthentication(m_odr, &t, 1, 0);
261 m_idAuthentication_buf =
262 odr_getbuf(m_odr, &m_idAuthentication_size, 0);
264 Z_OtherInformation *o = req->otherInfo;
265 z_OtherInformation(m_odr, &o, 1, 0);
266 m_otherInfo_buf = odr_getbuf(m_odr, &m_otherInfo_size, 0);
269 yf::SessionShared::InitKey::~InitKey()
274 bool yf::SessionShared::InitKey::operator < (const SessionShared::InitKey &k)
278 c = mp::util::memcmp2(
279 (void*) m_idAuthentication_buf, m_idAuthentication_size,
280 (void*) k.m_idAuthentication_buf, k.m_idAuthentication_size);
286 c = mp::util::memcmp2((void*) m_otherInfo_buf, m_otherInfo_size,
287 (void*) k.m_otherInfo_buf, k.m_otherInfo_size);
295 void yf::SessionShared::BackendClass::release_backend(BackendInstancePtr b)
297 boost::mutex::scoped_lock lock(m_mutex_backend_class);
302 void yf::SessionShared::BackendClass::remove_backend(BackendInstancePtr b)
304 BackendInstanceList::iterator it = m_backend_list.begin();
306 while (it != m_backend_list.end())
311 (*it)->m_close_package->response() = odr.create_close(
312 0, Z_Close_lackOfActivity, 0);
313 (*it)->m_close_package->session().close();
314 (*it)->m_close_package->move();
316 it = m_backend_list.erase(it);
325 yf::SessionShared::BackendInstancePtr
326 yf::SessionShared::BackendClass::get_backend(
327 const mp::Package &frontend_package)
330 boost::mutex::scoped_lock lock(m_mutex_backend_class);
332 BackendInstanceList::const_iterator it = m_backend_list.begin();
334 BackendInstancePtr backend1; // null
336 for (; it != m_backend_list.end(); it++)
338 if (!(*it)->m_in_use)
341 || (*it)->m_sequence_this < backend1->m_sequence_this)
347 use_backend(backend1);
351 return create_backend(frontend_package);
354 void yf::SessionShared::BackendClass::use_backend(BackendInstancePtr backend)
356 backend->m_in_use = true;
357 backend->m_sequence_this = m_sequence_top++;
360 void yf::SessionShared::BackendInstance::timestamp()
363 time(&m_time_last_use);
366 yf::SessionShared::BackendInstance::~BackendInstance()
368 delete m_close_package;
371 yf::SessionShared::BackendInstancePtr yf::SessionShared::BackendClass::create_backend(
372 const mp::Package &frontend_package)
374 BackendInstancePtr bp(new BackendInstance);
375 BackendInstancePtr null;
377 bp->m_close_package =
378 new mp::Package(bp->m_session, frontend_package.origin());
379 bp->m_close_package->copy_filter(frontend_package);
381 Package init_package(bp->m_session, frontend_package.origin());
383 init_package.copy_filter(frontend_package);
385 yazpp_1::GDU actual_init_request = m_init_request;
386 Z_GDU *init_pdu = actual_init_request.get();
388 assert(init_pdu->which == Z_GDU_Z3950);
389 assert(init_pdu->u.z3950->which == Z_APDU_initRequest);
391 Z_InitRequest *req = init_pdu->u.z3950->u.initRequest;
392 ODR_MASK_ZERO(req->options);
394 ODR_MASK_SET(req->options, Z_Options_search);
395 ODR_MASK_SET(req->options, Z_Options_present);
396 ODR_MASK_SET(req->options, Z_Options_namedResultSets);
397 ODR_MASK_SET(req->options, Z_Options_scan);
399 ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_1);
400 ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_2);
401 ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_3);
403 if (m_preferredMessageSize)
404 *req->preferredMessageSize = m_preferredMessageSize;
405 if (m_maximumRecordSize)
406 *req->maximumRecordSize = m_maximumRecordSize;
408 init_package.request() = init_pdu;
412 boost::mutex::scoped_lock lock(m_mutex_backend_class);
414 m_named_result_sets = false;
415 Z_GDU *gdu = init_package.response().get();
417 if (gdu && gdu->which == Z_GDU_Z3950
418 && gdu->u.z3950->which == Z_APDU_initResponse)
420 Z_InitResponse *res = gdu->u.z3950->u.initResponse;
421 m_init_response = gdu->u.z3950;
422 if (ODR_MASK_GET(res->options, Z_Options_namedResultSets))
424 m_named_result_sets = true;
426 if (*gdu->u.z3950->u.initResponse->result
427 && !init_package.session().is_closed())
430 time(&bp->m_time_last_use);
431 bp->m_sequence_this = 0;
432 bp->m_result_set_sequence = 0;
433 m_backend_list.push_back(bp);
439 yazpp_1::GDU empty_gdu;
440 m_init_response = empty_gdu;
443 if (!init_package.session().is_closed())
445 init_package.copy_filter(frontend_package);
446 init_package.session().close();
453 yf::SessionShared::BackendClass::BackendClass(const yazpp_1::GDU &init_request,
457 Odr_int preferredMessageSize,
458 Odr_int maximumRecordSize)
459 : m_named_result_sets(false), m_init_request(init_request),
460 m_sequence_top(0), m_backend_set_ttl(resultset_ttl),
461 m_backend_expiry_ttl(session_ttl), m_backend_set_max(resultset_max),
462 m_preferredMessageSize(preferredMessageSize),
463 m_maximumRecordSize(maximumRecordSize)
466 yf::SessionShared::BackendClass::~BackendClass()
469 void yf::SessionShared::Rep::stat()
472 int no_instances = 0;
473 BackendClassMap::const_iterator it;
475 boost::mutex::scoped_lock lock(m_mutex_backend_map);
476 for (it = m_backend_map.begin(); it != m_backend_map.end(); it++)
478 BackendClassPtr bc = it->second;
480 BackendInstanceList::iterator bit = bc->m_backend_list.begin();
481 for (; bit != bc->m_backend_list.end(); bit++)
487 void yf::SessionShared::Rep::init(mp::Package &package, const Z_GDU *gdu,
488 FrontendPtr frontend)
490 Z_InitRequest *req = gdu->u.z3950->u.initRequest;
492 frontend->m_is_virtual = true;
493 frontend->m_init_options = *req->options;
496 boost::mutex::scoped_lock lock(m_mutex_backend_map);
497 BackendClassMap::const_iterator it;
498 it = m_backend_map.find(k);
499 if (it == m_backend_map.end())
501 BackendClassPtr b(new BackendClass(gdu->u.z3950,
505 m_preferredMessageSize,
506 m_maximumRecordSize));
507 m_backend_map[k] = b;
508 frontend->m_backend_class = b;
512 frontend->m_backend_class = it->second;
515 BackendClassPtr bc = frontend->m_backend_class;
518 // we only need to get init response from "first" target in
519 // backend class - the assumption being that init response is
521 if (bc->m_backend_list.size() == 0)
523 BackendInstancePtr backend = bc->create_backend(package);
525 bc->release_backend(backend);
528 yazpp_1::GDU init_response;
530 boost::mutex::scoped_lock lock(bc->m_mutex_backend_class);
532 init_response = bc->m_init_response;
535 if (init_response.get())
537 Z_GDU *response_gdu = init_response.get();
538 mp::util::transfer_referenceId(odr, gdu->u.z3950,
539 response_gdu->u.z3950);
540 Z_InitResponse *init_res = response_gdu->u.z3950->u.initResponse;
541 Z_Options *server_options = init_res->options;
542 Z_Options *client_options = &frontend->m_init_options;
544 for (i = 0; i < 30; i++)
545 if (!ODR_MASK_GET(client_options, i))
546 ODR_MASK_CLEAR(server_options, i);
548 if (!m_preferredMessageSize ||
549 *init_res->preferredMessageSize > *req->preferredMessageSize)
550 *init_res->preferredMessageSize = *req->preferredMessageSize;
552 if (!m_maximumRecordSize ||
553 *init_res->maximumRecordSize > *req->maximumRecordSize)
554 *init_res->maximumRecordSize = *req->maximumRecordSize;
556 package.response() = init_response;
557 if (!*response_gdu->u.z3950->u.initResponse->result)
558 package.session().close();
563 odr.create_initResponse(
564 gdu->u.z3950, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR,
565 "session_shared: target closed connection during init");
566 *apdu->u.initResponse->result = 0;
567 package.response() = apdu;
568 package.session().close();
572 void yf::SessionShared::BackendSet::timestamp()
574 time(&m_time_last_use);
577 yf::SessionShared::BackendSet::BackendSet(
578 const std::string &result_set_id,
579 const Databases &databases,
580 const yazpp_1::Yaz_Z_Query &query,
581 Z_OtherInformation *additionalSearchInfo) :
582 m_result_set_id(result_set_id),
583 m_databases(databases), m_result_set_size(0), m_query(query)
586 mem_additionalSearchInfo = nmem_create();
587 additionalSearchInfoResponse = 0;
588 additionalSearchInfoRequest =
589 yaz_clone_z_OtherInformation(additionalSearchInfo,
590 mem_additionalSearchInfo);
593 yf::SessionShared::BackendSet::~BackendSet()
595 nmem_destroy(mem_additionalSearchInfo);
598 static int get_diagnostic(Z_DefaultDiagFormat *r)
600 return *r->condition;
603 bool yf::SessionShared::BackendSet::search(
604 mp::Package &frontend_package,
605 mp::Package &search_package,
606 const Z_APDU *frontend_apdu,
607 const BackendInstancePtr bp,
608 Z_Records **z_records)
611 Z_APDU *apdu_req = zget_APDU(odr, Z_APDU_searchRequest);
612 Z_SearchRequest *req = apdu_req->u.searchRequest;
614 req->additionalSearchInfo = additionalSearchInfoRequest;
615 req->resultSetName = odr_strdup(odr, m_result_set_id.c_str());
616 req->query = m_query.get_Z_Query();
618 req->num_databaseNames = m_databases.size();
619 req->databaseNames = (char**)
620 odr_malloc(odr, req->num_databaseNames * sizeof(char *));
621 Databases::const_iterator it = m_databases.begin();
623 for (; it != m_databases.end(); it++)
624 req->databaseNames[i++] = odr_strdup(odr, it->c_str());
626 if (frontend_apdu->which == Z_APDU_searchRequest)
627 req->preferredRecordSyntax =
628 frontend_apdu->u.searchRequest->preferredRecordSyntax;
630 search_package.request() = apdu_req;
632 search_package.move();
634 Z_GDU *gdu = search_package.response().get();
635 if (!search_package.session().is_closed()
636 && gdu && gdu->which == Z_GDU_Z3950
637 && gdu->u.z3950->which == Z_APDU_searchResponse)
639 Z_SearchResponse *b_resp = gdu->u.z3950->u.searchResponse;
640 *z_records = b_resp->records;
641 m_result_set_size = *b_resp->resultCount;
643 additionalSearchInfoResponse = yaz_clone_z_OtherInformation(
644 b_resp->additionalSearchInfo, mem_additionalSearchInfo);
648 const char *addinfo = "session_shared: "
649 "target closed connection during search";
650 if (frontend_apdu->which == Z_APDU_searchRequest)
651 f_apdu = odr.create_searchResponse(
652 frontend_apdu, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR, addinfo);
653 else if (frontend_apdu->which == Z_APDU_presentRequest)
654 f_apdu = odr.create_presentResponse(
655 frontend_apdu, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR, addinfo);
657 f_apdu = odr.create_close(
658 frontend_apdu, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR, addinfo);
659 frontend_package.response() = f_apdu;
663 void yf::SessionShared::Frontend::override_set(
664 BackendInstancePtr &found_backend,
665 std::string &result_set_id,
666 const Databases &databases,
667 bool out_of_sessions)
669 BackendClassPtr bc = m_backend_class;
670 BackendInstanceList::const_iterator it = bc->m_backend_list.begin();
674 size_t max_sets = bc->m_named_result_sets ? bc->m_backend_set_max : 1;
675 for (; it != bc->m_backend_list.end(); it++)
677 if (!(*it)->m_in_use)
679 BackendSetList::iterator set_it = (*it)->m_sets.begin();
680 for (; set_it != (*it)->m_sets.end(); set_it++)
682 if ((max_sets > 1 || (*set_it)->m_databases == databases)
685 now < (*set_it)->m_time_last_use ||
686 now - (*set_it)->m_time_last_use >= bc->m_backend_set_ttl))
689 result_set_id = (*set_it)->m_result_set_id;
690 found_backend->m_sets.erase(set_it);
696 for (it = bc->m_backend_list.begin(); it != bc->m_backend_list.end(); it++)
698 if (!(*it)->m_in_use && (*it)->m_sets.size() < max_sets)
701 if (bc->m_named_result_sets)
703 result_set_id = boost::io::str(
704 boost::format("%1%") %
705 found_backend->m_result_set_sequence);
706 found_backend->m_result_set_sequence++;
709 result_set_id = "default";
715 void yf::SessionShared::Frontend::get_set(mp::Package &package,
716 const Z_APDU *apdu_req,
717 const Databases &databases,
718 yazpp_1::Yaz_Z_Query &query,
719 BackendInstancePtr &found_backend,
720 BackendSetPtr &found_set)
722 bool session_restarted = false;
723 Z_OtherInformation *additionalSearchInfo = 0;
725 if (apdu_req->which == Z_APDU_searchRequest)
726 additionalSearchInfo = apdu_req->u.searchRequest->additionalSearchInfo;
729 std::string result_set_id;
730 bool out_of_sessions = false;
731 BackendClassPtr bc = m_backend_class;
733 boost::mutex::scoped_lock lock(bc->m_mutex_backend_class);
735 if ((int) bc->m_backend_list.size() >= m_p->m_session_max)
736 out_of_sessions = true;
738 if (m_p->m_optimize_search)
740 // look at each backend and see if we have a similar search
741 BackendInstanceList::const_iterator it = bc->m_backend_list.begin();
742 for (; it != bc->m_backend_list.end(); it++)
744 if (!(*it)->m_in_use)
746 BackendSetList::const_iterator set_it = (*it)->m_sets.begin();
747 for (; set_it != (*it)->m_sets.end(); set_it++)
749 // for real present request we don't care
750 // if additionalSearchInfo matches: same records
751 if ((*set_it)->m_databases == databases
752 && query.match(&(*set_it)->m_query)
753 && (apdu_req->which != Z_APDU_searchRequest ||
754 yaz_compare_z_OtherInformation(
755 additionalSearchInfo,
756 (*set_it)->additionalSearchInfoRequest)))
760 bc->use_backend(found_backend);
761 // found matching set. No need to search again
768 override_set(found_backend, result_set_id, databases, out_of_sessions);
770 bc->use_backend(found_backend);
774 // create a new backend set (and new set) if we're not out of sessions
775 if (!out_of_sessions)
776 found_backend = bc->create_backend(package);
782 const char *addinfo = 0;
785 addinfo = "session_shared: all sessions in use";
787 addinfo = "session_shared: could not create backend";
788 if (apdu_req->which == Z_APDU_searchRequest)
790 f_apdu = odr.create_searchResponse(
791 apdu_req, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR, addinfo);
793 else if (apdu_req->which == Z_APDU_presentRequest)
795 f_apdu = odr.create_presentResponse(
796 apdu_req, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR, addinfo);
800 f_apdu = odr.create_close(
801 apdu_req, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR, addinfo);
803 package.response() = f_apdu;
806 if (bc->m_named_result_sets)
808 result_set_id = boost::io::str(
809 boost::format("%1%") % found_backend->m_result_set_sequence);
810 found_backend->m_result_set_sequence++;
813 result_set_id = "default";
815 found_backend->timestamp();
817 // we must search ...
818 BackendSetPtr new_set(new BackendSet(result_set_id,
820 additionalSearchInfo));
821 Z_Records *z_records = 0;
823 Package search_package(found_backend->m_session, package.origin());
824 search_package.copy_filter(package);
826 if (!new_set->search(package, search_package,
827 apdu_req, found_backend, &z_records))
829 bc->remove_backend(found_backend);
830 return; // search error
836 if (z_records->which == Z_Records_NSD)
839 get_diagnostic(z_records->u.nonSurrogateDiagnostic);
841 else if (z_records->which == Z_Records_multipleNSD)
843 if (z_records->u.multipleNonSurDiagnostics->num_diagRecs >= 1
846 z_records->u.multipleNonSurDiagnostics->diagRecs[0]->which ==
847 Z_DiagRec_defaultFormat)
849 condition = get_diagnostic(
850 z_records->u.multipleNonSurDiagnostics->diagRecs[0]->u.defaultFormat);
854 if (m_p->m_restart && !session_restarted &&
855 condition == YAZ_BIB1_TEMPORARY_SYSTEM_ERROR)
857 package.log("session_shared", YLOG_LOG, "restart");
858 bc->remove_backend(found_backend);
859 session_restarted = true;
860 found_backend.reset();
868 if (apdu_req->which == Z_APDU_searchRequest)
870 Z_APDU *f_apdu = odr.create_searchResponse(apdu_req,
872 Z_SearchResponse *f_resp = f_apdu->u.searchResponse;
873 *f_resp->searchStatus = Z_SearchResponse_none;
874 f_resp->records = z_records;
875 package.response() = f_apdu;
877 if (apdu_req->which == Z_APDU_presentRequest)
879 Z_APDU *f_apdu = odr.create_presentResponse(apdu_req,
881 Z_PresentResponse *f_resp = f_apdu->u.presentResponse;
882 f_resp->records = z_records;
883 package.response() = f_apdu;
885 bc->release_backend(found_backend);
886 return; // search error
889 if (m_p->m_restart && !session_restarted && new_set->m_result_set_size < 0)
891 package.log("session_shared", YLOG_LOG, "restart");
892 bc->remove_backend(found_backend);
893 session_restarted = true;
894 found_backend.reset();
899 found_set->timestamp();
900 found_backend->m_sets.push_back(found_set);
903 int yf::SessionShared::Frontend::result_set_ref(ODR o,
904 const Databases &databases,
911 case Z_RPNStructure_simple:
912 if (s->u.simple->which == Z_Operand_resultSetId)
914 const char *id = s->u.simple->u.resultSetId;
917 FrontendSets::iterator fset_it = m_frontend_sets.find(id);
918 if (fset_it == m_frontend_sets.end())
920 ret = YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST;
922 else if (fset_it->second->get_databases() != databases)
924 ret = YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST;
928 yazpp_1::Yaz_Z_Query query = fset_it->second->get_query();
929 Z_Query *q = yaz_copy_Z_Query(query.get_Z_Query(), o);
930 if (q->which == Z_Query_type_1 || q->which == Z_Query_type_101)
932 s->which = q->u.type_1->RPNStructure->which;
933 s->u.simple = q->u.type_1->RPNStructure->u.simple;
937 ret = YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST;
942 case Z_RPNStructure_complex:
943 ret = result_set_ref(o, databases, s->u.complex->s1, rset);
945 ret = result_set_ref(o, databases, s->u.complex->s2, rset);
951 void yf::SessionShared::Frontend::search(mp::Package &package,
954 Z_SearchRequest *req = apdu_req->u.searchRequest;
955 FrontendSets::iterator fset_it =
956 m_frontend_sets.find(req->resultSetName);
957 if (fset_it != m_frontend_sets.end())
959 // result set already exist
960 // if replace indicator is off: we return diagnostic if
961 // result set already exist.
962 if (*req->replaceIndicator == 0)
966 odr.create_searchResponse(
968 YAZ_BIB1_RESULT_SET_EXISTS_AND_REPLACE_INDICATOR_OFF,
970 package.response() = apdu;
973 m_frontend_sets.erase(fset_it);
978 for (i = 0; i < req->num_databaseNames; i++)
979 databases.push_back(req->databaseNames[i]);
982 yazpp_1::Yaz_Z_Query query;
983 query.set_Z_Query(req->query);
985 Z_Query *q = query.get_Z_Query();
986 if (q->which == Z_Query_type_1 || q->which == Z_Query_type_101)
990 int diag = result_set_ref(odr, databases, q->u.type_1->RPNStructure,
995 odr.create_searchResponse(
999 package.response() = apdu;
1002 query.set_Z_Query(q);
1005 BackendSetPtr found_set; // null
1006 BackendInstancePtr found_backend; // null
1008 get_set(package, apdu_req, databases, query, found_backend, found_set);
1013 Z_APDU *f_apdu = odr.create_searchResponse(apdu_req, 0, 0);
1014 Z_SearchResponse *f_resp = f_apdu->u.searchResponse;
1015 *f_resp->resultCount = found_set->m_result_set_size;
1016 f_resp->additionalSearchInfo = found_set->additionalSearchInfoResponse;
1017 package.response() = f_apdu;
1019 FrontendSetPtr fset(new FrontendSet(databases, query));
1020 m_frontend_sets[req->resultSetName] = fset;
1022 m_backend_class->release_backend(found_backend);
1025 void yf::SessionShared::Frontend::present(mp::Package &package,
1029 Z_PresentRequest *req = apdu_req->u.presentRequest;
1031 FrontendSets::iterator fset_it =
1032 m_frontend_sets.find(req->resultSetId);
1034 if (fset_it == m_frontend_sets.end())
1037 odr.create_presentResponse(
1039 YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST,
1041 package.response() = apdu;
1044 FrontendSetPtr fset = fset_it->second;
1046 Databases databases = fset->get_databases();
1047 yazpp_1::Yaz_Z_Query query = fset->get_query();
1049 BackendClassPtr bc = m_backend_class;
1050 BackendSetPtr found_set; // null
1051 BackendInstancePtr found_backend;
1053 get_set(package, apdu_req, databases, query, found_backend, found_set);
1057 Z_NamePlusRecordList *npr_res = 0;
1058 if (found_set->m_record_cache.lookup(odr, &npr_res,
1059 *req->resultSetStartPoint,
1060 *req->numberOfRecordsRequested,
1061 req->preferredRecordSyntax,
1062 req->recordComposition))
1064 Z_APDU *f_apdu_res = odr.create_presentResponse(apdu_req, 0, 0);
1065 Z_PresentResponse *f_resp = f_apdu_res->u.presentResponse;
1067 yaz_log(YLOG_LOG, "Found " ODR_INT_PRINTF "+" ODR_INT_PRINTF
1068 " records in cache %p",
1069 *req->resultSetStartPoint,
1070 *req->numberOfRecordsRequested,
1071 &found_set->m_record_cache);
1073 *f_resp->numberOfRecordsReturned = *req->numberOfRecordsRequested;
1074 *f_resp->nextResultSetPosition =
1075 *req->resultSetStartPoint + *req->numberOfRecordsRequested;
1076 // f_resp->presentStatus assumed OK.
1077 f_resp->records = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
1078 f_resp->records->which = Z_Records_DBOSD;
1079 f_resp->records->u.databaseOrSurDiagnostics = npr_res;
1080 package.response() = f_apdu_res;
1081 bc->release_backend(found_backend);
1085 found_backend->timestamp();
1087 Z_APDU *p_apdu = zget_APDU(odr, Z_APDU_presentRequest);
1088 Z_PresentRequest *p_req = p_apdu->u.presentRequest;
1089 p_req->preferredRecordSyntax = req->preferredRecordSyntax;
1090 p_req->resultSetId = odr_strdup(odr, found_set->m_result_set_id.c_str());
1091 *p_req->resultSetStartPoint = *req->resultSetStartPoint;
1092 *p_req->numberOfRecordsRequested = *req->numberOfRecordsRequested;
1093 p_req->preferredRecordSyntax = req->preferredRecordSyntax;
1094 p_req->recordComposition = req->recordComposition;
1096 Package present_package(found_backend->m_session, package.origin());
1097 present_package.copy_filter(package);
1099 present_package.request() = p_apdu;
1101 present_package.move();
1103 Z_GDU *gdu = present_package.response().get();
1104 if (!present_package.session().is_closed()
1105 && gdu && gdu->which == Z_GDU_Z3950
1106 && gdu->u.z3950->which == Z_APDU_presentResponse)
1108 Z_PresentResponse *b_resp = gdu->u.z3950->u.presentResponse;
1109 Z_APDU *f_apdu_res = odr.create_presentResponse(apdu_req, 0, 0);
1110 Z_PresentResponse *f_resp = f_apdu_res->u.presentResponse;
1112 f_resp->numberOfRecordsReturned = b_resp->numberOfRecordsReturned;
1113 f_resp->nextResultSetPosition = b_resp->nextResultSetPosition;
1114 f_resp->presentStatus= b_resp->presentStatus;
1115 f_resp->records = b_resp->records;
1116 f_resp->otherInfo = b_resp->otherInfo;
1117 package.response() = f_apdu_res;
1119 if (b_resp->records && b_resp->records->which == Z_Records_DBOSD)
1122 yaz_log(YLOG_LOG, "Adding " ODR_INT_PRINTF "+" ODR_INT_PRINTF
1123 " records to cache %p",
1124 *req->resultSetStartPoint,
1125 *f_resp->numberOfRecordsReturned,
1126 &found_set->m_record_cache);
1128 found_set->m_record_cache.add(
1130 b_resp->records->u.databaseOrSurDiagnostics,
1131 *req->resultSetStartPoint, p_req->recordComposition);
1133 bc->release_backend(found_backend);
1137 bc->remove_backend(found_backend);
1138 Z_APDU *f_apdu_res =
1139 odr.create_presentResponse(
1140 apdu_req, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR,
1141 "session_shared: target closed connection during present");
1142 package.response() = f_apdu_res;
1146 void yf::SessionShared::Frontend::scan(mp::Package &frontend_package,
1149 BackendClassPtr bc = m_backend_class;
1150 BackendInstancePtr backend = bc->get_backend(frontend_package);
1154 Z_APDU *apdu = odr.create_scanResponse(
1155 apdu_req, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR,
1156 "session_shared: could not create backend");
1157 frontend_package.response() = apdu;
1161 Package scan_package(backend->m_session, frontend_package.origin());
1162 backend->timestamp();
1163 scan_package.copy_filter(frontend_package);
1164 scan_package.request() = apdu_req;
1165 scan_package.move();
1166 frontend_package.response() = scan_package.response();
1167 if (scan_package.session().is_closed())
1169 frontend_package.session().close();
1170 bc->remove_backend(backend);
1173 bc->release_backend(backend);
1177 yf::SessionShared::Worker::Worker(SessionShared::Rep *rep) : m_p(rep)
1181 void yf::SessionShared::Worker::operator() (void)
1186 bool yf::SessionShared::BackendClass::expire_instances()
1190 boost::mutex::scoped_lock lock(m_mutex_backend_class);
1191 BackendInstanceList::iterator bit = m_backend_list.begin();
1192 while (bit != m_backend_list.end())
1194 time_t last_use = (*bit)->m_time_last_use;
1196 if ((*bit)->m_in_use)
1200 else if (now < last_use || now - last_use > m_backend_expiry_ttl)
1203 (*bit)->m_close_package->response() = odr.create_close(
1204 0, Z_Close_lackOfActivity, 0);
1205 (*bit)->m_close_package->session().close();
1206 (*bit)->m_close_package->move();
1208 bit = m_backend_list.erase(bit);
1215 if (m_backend_list.empty())
1220 void yf::SessionShared::Rep::expire_classes()
1222 boost::mutex::scoped_lock lock(m_mutex_backend_map);
1223 BackendClassMap::iterator b_it = m_backend_map.begin();
1224 while (b_it != m_backend_map.end())
1226 if (b_it->second->expire_instances())
1228 m_backend_map.erase(b_it);
1229 b_it = m_backend_map.begin();
1236 void yf::SessionShared::Rep::expire()
1241 boost::xtime_get(&xt,
1242 #if BOOST_VERSION >= 105000
1248 xt.sec += m_session_ttl / 3;
1249 boost::thread::sleep(xt);
1256 yf::SessionShared::Rep::Rep()
1258 m_resultset_ttl = 30;
1259 m_resultset_max = 10;
1261 m_optimize_search = true;
1263 m_session_max = 100;
1264 m_preferredMessageSize = 0;
1265 m_maximumRecordSize = 0;
1268 void yf::SessionShared::Rep::start()
1270 yf::SessionShared::Worker w(this);
1271 m_thrds.add_thread(new boost::thread(w));
1274 yf::SessionShared::SessionShared() : m_p(new SessionShared::Rep)
1278 yf::SessionShared::~SessionShared() {
1281 void yf::SessionShared::start() const
1286 yf::SessionShared::Frontend::Frontend(Rep *rep) : m_is_virtual(false), m_p(rep)
1290 yf::SessionShared::Frontend::~Frontend()
1294 yf::SessionShared::FrontendPtr yf::SessionShared::Rep::get_frontend(mp::Package &package)
1296 boost::mutex::scoped_lock lock(m_mutex);
1298 std::map<mp::Session,yf::SessionShared::FrontendPtr>::iterator it;
1302 it = m_clients.find(package.session());
1303 if (it == m_clients.end())
1306 if (!it->second->m_in_use)
1308 it->second->m_in_use = true;
1311 m_cond_session_ready.wait(lock);
1313 FrontendPtr f(new Frontend(this));
1314 m_clients[package.session()] = f;
1319 void yf::SessionShared::Rep::release_frontend(mp::Package &package)
1321 boost::mutex::scoped_lock lock(m_mutex);
1322 std::map<mp::Session,yf::SessionShared::FrontendPtr>::iterator it;
1324 it = m_clients.find(package.session());
1325 if (it != m_clients.end())
1327 if (package.session().is_closed())
1329 m_clients.erase(it);
1333 it->second->m_in_use = false;
1335 m_cond_session_ready.notify_all();
1340 void yf::SessionShared::process(mp::Package &package) const
1342 FrontendPtr f = m_p->get_frontend(package);
1344 Z_GDU *gdu = package.request().get();
1346 if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
1347 Z_APDU_initRequest && !f->m_is_virtual)
1349 m_p->init(package, gdu, f);
1351 else if (!f->m_is_virtual)
1353 else if (gdu && gdu->which == Z_GDU_Z3950)
1355 Z_APDU *apdu = gdu->u.z3950;
1356 if (apdu->which == Z_APDU_initRequest)
1360 package.response() = odr.create_close(
1362 Z_Close_protocolError,
1365 package.session().close();
1367 else if (apdu->which == Z_APDU_close)
1371 package.response() = odr.create_close(
1373 Z_Close_peerAbort, "received close from client");
1374 package.session().close();
1376 else if (apdu->which == Z_APDU_searchRequest)
1378 f->search(package, apdu);
1380 else if (apdu->which == Z_APDU_presentRequest)
1382 f->present(package, apdu);
1384 else if (apdu->which == Z_APDU_scanRequest)
1386 f->scan(package, apdu);
1392 package.response() = odr.create_close(
1393 apdu, Z_Close_protocolError,
1394 "unsupported APDU in filter_session_shared");
1396 package.session().close();
1399 m_p->release_frontend(package);
1402 void yf::SessionShared::configure(const xmlNode *ptr, bool test_only,
1405 for (ptr = ptr->children; ptr; ptr = ptr->next)
1407 if (ptr->type != XML_ELEMENT_NODE)
1409 if (!strcmp((const char *) ptr->name, "resultset"))
1411 const struct _xmlAttr *attr;
1412 for (attr = ptr->properties; attr; attr = attr->next)
1414 if (!strcmp((const char *) attr->name, "ttl"))
1415 m_p->m_resultset_ttl =
1416 mp::xml::get_int(attr->children, 30);
1417 else if (!strcmp((const char *) attr->name, "max"))
1419 m_p->m_resultset_max =
1420 mp::xml::get_int(attr->children, 10);
1422 else if (!strcmp((const char *) attr->name, "optimizesearch"))
1424 m_p->m_optimize_search =
1425 mp::xml::get_bool(attr->children, true);
1427 else if (!strcmp((const char *) attr->name, "restart"))
1429 m_p->m_restart = mp::xml::get_bool(attr->children, true);
1432 throw mp::filter::FilterException(
1433 "Bad attribute " + std::string((const char *)
1437 else if (!strcmp((const char *) ptr->name, "session"))
1439 const struct _xmlAttr *attr;
1440 for (attr = ptr->properties; attr; attr = attr->next)
1442 if (!strcmp((const char *) attr->name, "ttl"))
1443 m_p->m_session_ttl =
1444 mp::xml::get_int(attr->children, 90);
1445 else if (!strcmp((const char *) attr->name, "max"))
1446 m_p->m_session_max =
1447 mp::xml::get_int(attr->children, 100);
1449 throw mp::filter::FilterException(
1450 "Bad attribute " + std::string((const char *)
1454 else if (!strcmp((const char *) ptr->name, "init"))
1456 const struct _xmlAttr *attr;
1457 for (attr = ptr->properties; attr; attr = attr->next)
1459 if (!strcmp((const char *) attr->name, "maximum-record-size"))
1460 m_p->m_maximumRecordSize =
1461 mp::xml::get_int(attr->children, 0);
1462 else if (!strcmp((const char *) attr->name,
1463 "preferred-message-size"))
1464 m_p->m_preferredMessageSize =
1465 mp::xml::get_int(attr->children, 0);
1467 throw mp::filter::FilterException(
1468 "Bad attribute " + std::string((const char *)
1474 throw mp::filter::FilterException("Bad element "
1475 + std::string((const char *)
1481 static mp::filter::Base* filter_creator()
1483 return new mp::filter::SessionShared;
1487 struct metaproxy_1_filter_struct metaproxy_1_filter_session_shared = {
1497 * c-file-style: "Stroustrup"
1498 * indent-tabs-mode: nil
1500 * vim: shiftwidth=4 tabstop=8 expandtab