1 /* This file is part of Metaproxy.
2 Copyright (C) 2005-2008 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
22 #include "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>
32 #include "filter_session_shared.hpp"
36 #include <yaz/otherinfo.h>
37 #include <yaz/diagbib1.h>
38 #include <yazpp/z-query.h>
43 namespace mp = metaproxy_1;
44 namespace yf = metaproxy_1::filter;
46 namespace metaproxy_1 {
49 class SessionShared::InitKey {
51 bool operator < (const SessionShared::InitKey &k) const;
52 InitKey(Z_InitRequest *req);
53 InitKey(const InitKey &);
56 InitKey &operator = (const InitKey &k);
57 char *m_idAuthentication_buf;
58 int m_idAuthentication_size;
59 char *m_otherInfo_buf;
63 class SessionShared::Worker {
65 Worker(SessionShared::Rep *rep);
66 void operator() (void);
68 SessionShared::Rep *m_p;
70 class SessionShared::BackendSet {
72 std::string m_result_set_id;
73 Databases m_databases;
74 int m_result_set_size;
75 yazpp_1::Yaz_Z_Query m_query;
76 time_t m_time_last_use;
79 const std::string &result_set_id,
80 const Databases &databases,
81 const yazpp_1::Yaz_Z_Query &query);
83 Package &frontend_package,
84 const Z_APDU *apdu_req,
85 const BackendInstancePtr bp);
87 class SessionShared::BackendInstance {
89 friend class BackendClass;
90 friend class BackendSet;
92 mp::Session m_session;
93 BackendSetList m_sets;
96 int m_result_set_sequence;
97 time_t m_time_last_use;
98 mp::Package * m_close_package;
101 class SessionShared::BackendClass : boost::noncopyable {
103 friend struct Frontend;
104 bool m_named_result_sets;
105 BackendInstanceList m_backend_list;
106 BackendInstancePtr create_backend(const Package &package);
107 void remove_backend(BackendInstancePtr b);
108 BackendInstancePtr get_backend(const Package &package);
109 void use_backend(BackendInstancePtr b);
110 void release_backend(BackendInstancePtr b);
112 yazpp_1::GDU m_init_request;
113 yazpp_1::GDU m_init_response;
114 boost::mutex m_mutex_backend_class;
116 time_t m_backend_set_ttl;
117 time_t m_backend_expiry_ttl;
118 size_t m_backend_set_max;
120 BackendClass(const yazpp_1::GDU &init_request,
126 class SessionShared::FrontendSet {
127 Databases m_databases;
128 yazpp_1::Yaz_Z_Query m_query;
130 const Databases &get_databases();
131 const yazpp_1::Yaz_Z_Query &get_query();
133 const Databases &databases,
134 const yazpp_1::Yaz_Z_Query &query);
137 struct SessionShared::Frontend {
142 Z_Options m_init_options;
143 void search(Package &package, Z_APDU *apdu);
144 void present(Package &package, Z_APDU *apdu);
145 void scan(Package &package, Z_APDU *apdu);
147 void get_set(mp::Package &package,
148 const Z_APDU *apdu_req,
149 const Databases &databases,
150 yazpp_1::Yaz_Z_Query &query,
151 BackendInstancePtr &found_backend,
152 BackendSetPtr &found_set);
153 void override_set(BackendInstancePtr &found_backend,
154 std::string &result_set_id);
157 BackendClassPtr m_backend_class;
158 FrontendSets m_frontend_sets;
160 class SessionShared::Rep {
161 friend class SessionShared;
162 friend struct Frontend;
164 FrontendPtr get_frontend(Package &package);
165 void release_frontend(Package &package);
170 void init(Package &package, const Z_GDU *gdu,
171 FrontendPtr frontend);
172 boost::mutex m_mutex;
173 boost::condition m_cond_session_ready;
174 std::map<mp::Session, FrontendPtr> m_clients;
176 BackendClassMap m_backend_map;
177 boost::mutex m_mutex_backend_map;
178 boost::thread_group m_thrds;
186 yf::SessionShared::FrontendSet::FrontendSet(
187 const Databases &databases,
188 const yazpp_1::Yaz_Z_Query &query)
189 : m_databases(databases), m_query(query)
193 const yf::SessionShared::Databases &
194 yf::SessionShared::FrontendSet::get_databases()
199 const yazpp_1::Yaz_Z_Query& yf::SessionShared::FrontendSet::get_query()
204 yf::SessionShared::InitKey::InitKey(const InitKey &k)
206 m_odr = odr_createmem(ODR_ENCODE);
208 m_idAuthentication_size = k.m_idAuthentication_size;
209 m_idAuthentication_buf = (char*)odr_malloc(m_odr, m_idAuthentication_size);
210 memcpy(m_idAuthentication_buf, k.m_idAuthentication_buf,
211 m_idAuthentication_size);
213 m_otherInfo_size = k.m_otherInfo_size;
214 m_otherInfo_buf = (char*)odr_malloc(m_odr, m_otherInfo_size);
215 memcpy(m_otherInfo_buf, k.m_otherInfo_buf,
219 yf::SessionShared::InitKey::InitKey(Z_InitRequest *req)
221 m_odr = odr_createmem(ODR_ENCODE);
223 Z_IdAuthentication *t = req->idAuthentication;
224 z_IdAuthentication(m_odr, &t, 1, 0);
225 m_idAuthentication_buf =
226 odr_getbuf(m_odr, &m_idAuthentication_size, 0);
228 Z_OtherInformation *o = req->otherInfo;
229 z_OtherInformation(m_odr, &o, 1, 0);
230 m_otherInfo_buf = odr_getbuf(m_odr, &m_otherInfo_size, 0);
233 yf::SessionShared::InitKey::~InitKey()
238 bool yf::SessionShared::InitKey::operator < (const SessionShared::InitKey &k)
242 c = mp::util::memcmp2(
243 (void*) m_idAuthentication_buf, m_idAuthentication_size,
244 (void*) k.m_idAuthentication_buf, k.m_idAuthentication_size);
250 c = mp::util::memcmp2((void*) m_otherInfo_buf, m_otherInfo_size,
251 (void*) k.m_otherInfo_buf, k.m_otherInfo_size);
259 void yf::SessionShared::BackendClass::release_backend(BackendInstancePtr b)
261 boost::mutex::scoped_lock lock(m_mutex_backend_class);
266 void yf::SessionShared::BackendClass::remove_backend(BackendInstancePtr b)
268 BackendInstanceList::iterator it = m_backend_list.begin();
270 while (it != m_backend_list.end())
273 it = m_backend_list.erase(it);
281 yf::SessionShared::BackendInstancePtr
282 yf::SessionShared::BackendClass::get_backend(
283 const mp::Package &frontend_package)
286 boost::mutex::scoped_lock lock(m_mutex_backend_class);
288 BackendInstanceList::const_iterator it = m_backend_list.begin();
290 BackendInstancePtr backend1; // null
292 for (; it != m_backend_list.end(); it++)
294 if (!(*it)->m_in_use)
297 || (*it)->m_sequence_this < backend1->m_sequence_this)
303 use_backend(backend1);
307 return create_backend(frontend_package);
310 void yf::SessionShared::BackendClass::use_backend(BackendInstancePtr backend)
312 backend->m_in_use = true;
313 time(&backend->m_time_last_use);
314 backend->m_sequence_this = m_sequence_top++;
317 yf::SessionShared::BackendInstance::~BackendInstance()
319 delete m_close_package;
322 yf::SessionShared::BackendInstancePtr yf::SessionShared::BackendClass::create_backend(
323 const mp::Package &frontend_package)
325 BackendInstancePtr bp(new BackendInstance);
326 BackendInstancePtr null;
328 bp->m_close_package =
329 new mp::Package(bp->m_session, frontend_package.origin());
330 bp->m_close_package->copy_filter(frontend_package);
332 Package init_package(bp->m_session, frontend_package.origin());
334 init_package.copy_filter(frontend_package);
336 yazpp_1::GDU actual_init_request = m_init_request;
337 Z_GDU *init_pdu = actual_init_request.get();
339 assert(init_pdu->which == Z_GDU_Z3950);
340 assert(init_pdu->u.z3950->which == Z_APDU_initRequest);
342 Z_InitRequest *req = init_pdu->u.z3950->u.initRequest;
343 ODR_MASK_ZERO(req->options);
345 ODR_MASK_SET(req->options, Z_Options_search);
346 ODR_MASK_SET(req->options, Z_Options_present);
347 ODR_MASK_SET(req->options, Z_Options_namedResultSets);
348 ODR_MASK_SET(req->options, Z_Options_scan);
350 ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_1);
351 ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_2);
352 ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_3);
354 init_package.request() = init_pdu;
358 boost::mutex::scoped_lock lock(m_mutex_backend_class);
360 m_named_result_sets = false;
361 Z_GDU *gdu = init_package.response().get();
362 if (!init_package.session().is_closed()
363 && gdu && gdu->which == Z_GDU_Z3950
364 && gdu->u.z3950->which == Z_APDU_initResponse)
366 Z_InitResponse *res = gdu->u.z3950->u.initResponse;
369 m_init_response = gdu->u.z3950;
370 if (ODR_MASK_GET(res->options, Z_Options_namedResultSets))
372 m_named_result_sets = true;
377 // did not receive an init response or closed
381 time(&bp->m_time_last_use);
382 bp->m_sequence_this = 0;
383 bp->m_result_set_sequence = 0;
384 m_backend_list.push_back(bp);
390 yf::SessionShared::BackendClass::BackendClass(const yazpp_1::GDU &init_request,
394 : m_named_result_sets(false), m_init_request(init_request),
395 m_sequence_top(0), m_backend_set_ttl(resultset_ttl),
396 m_backend_expiry_ttl(session_ttl), m_backend_set_max(resultset_max)
399 yf::SessionShared::BackendClass::~BackendClass()
402 void yf::SessionShared::Rep::init(mp::Package &package, const Z_GDU *gdu,
403 FrontendPtr frontend)
405 Z_InitRequest *req = gdu->u.z3950->u.initRequest;
407 frontend->m_is_virtual = true;
408 frontend->m_init_options = *req->options;
411 boost::mutex::scoped_lock lock(m_mutex_backend_map);
412 BackendClassMap::const_iterator it;
413 it = m_backend_map.find(k);
414 if (it == m_backend_map.end())
416 BackendClassPtr b(new BackendClass(gdu->u.z3950,
420 m_backend_map[k] = b;
421 frontend->m_backend_class = b;
425 frontend->m_backend_class = it->second;
428 BackendClassPtr bc = frontend->m_backend_class;
429 BackendInstancePtr backend = bc->get_backend(package);
434 Z_APDU *apdu = odr.create_initResponse(gdu->u.z3950, 0, 0);
435 *apdu->u.initResponse->result = 0;
436 package.response() = apdu;
437 package.session().close();
441 boost::mutex::scoped_lock lock(bc->m_mutex_backend_class);
442 yazpp_1::GDU init_response = bc->m_init_response;
443 Z_GDU *response_gdu = init_response.get();
444 mp::util::transfer_referenceId(odr, gdu->u.z3950,
445 response_gdu->u.z3950);
447 Z_Options *server_options =
448 response_gdu->u.z3950->u.initResponse->options;
449 Z_Options *client_options = &frontend->m_init_options;
452 for (i = 0; i<30; i++)
453 if (!ODR_MASK_GET(client_options, i))
454 ODR_MASK_CLEAR(server_options, i);
455 package.response() = init_response;
458 bc->release_backend(backend);
461 void yf::SessionShared::BackendSet::timestamp()
463 time(&m_time_last_use);
466 yf::SessionShared::BackendSet::BackendSet(
467 const std::string &result_set_id,
468 const Databases &databases,
469 const yazpp_1::Yaz_Z_Query &query) :
470 m_result_set_id(result_set_id),
471 m_databases(databases), m_result_set_size(0), m_query(query)
476 bool yf::SessionShared::BackendSet::search(
477 mp::Package &frontend_package,
478 const Z_APDU *frontend_apdu,
479 const BackendInstancePtr bp)
481 Package search_package(bp->m_session, frontend_package.origin());
483 search_package.copy_filter(frontend_package);
486 Z_APDU *apdu_req = zget_APDU(odr, Z_APDU_searchRequest);
487 Z_SearchRequest *req = apdu_req->u.searchRequest;
489 req->resultSetName = odr_strdup(odr, m_result_set_id.c_str());
490 req->query = m_query.get_Z_Query();
492 req->num_databaseNames = m_databases.size();
493 req->databaseNames = (char**)
494 odr_malloc(odr, req->num_databaseNames * sizeof(char *));
495 Databases::const_iterator it = m_databases.begin();
497 for (; it != m_databases.end(); it++)
498 req->databaseNames[i++] = odr_strdup(odr, it->c_str());
500 search_package.request() = apdu_req;
502 search_package.move();
504 Z_Records *z_records_diag = 0;
505 Z_GDU *gdu = search_package.response().get();
506 if (!search_package.session().is_closed()
507 && gdu && gdu->which == Z_GDU_Z3950
508 && gdu->u.z3950->which == Z_APDU_searchResponse)
510 Z_SearchResponse *b_resp = gdu->u.z3950->u.searchResponse;
513 if (b_resp->records->which == Z_Records_NSD
514 || b_resp->records->which == Z_Records_multipleNSD)
515 z_records_diag = b_resp->records;
519 if (frontend_apdu->which == Z_APDU_searchRequest)
521 Z_APDU *f_apdu = odr.create_searchResponse(frontend_apdu,
523 Z_SearchResponse *f_resp = f_apdu->u.searchResponse;
524 f_resp->records = z_records_diag;
525 frontend_package.response() = f_apdu;
528 if (frontend_apdu->which == Z_APDU_presentRequest)
530 Z_APDU *f_apdu = odr.create_presentResponse(frontend_apdu,
532 Z_PresentResponse *f_resp = f_apdu->u.presentResponse;
533 f_resp->records = z_records_diag;
534 frontend_package.response() = f_apdu;
538 m_result_set_size = *b_resp->resultCount;
542 if (frontend_apdu->which == Z_APDU_searchRequest)
543 f_apdu = odr.create_searchResponse(
544 frontend_apdu, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR, 0);
545 else if (frontend_apdu->which == Z_APDU_presentRequest)
546 f_apdu = odr.create_presentResponse(
547 frontend_apdu, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR, 0);
549 f_apdu = odr.create_close(
550 frontend_apdu, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR, 0);
551 frontend_package.response() = f_apdu;
555 void yf::SessionShared::Frontend::override_set(
556 BackendInstancePtr &found_backend,
557 std::string &result_set_id)
559 BackendClassPtr bc = m_backend_class;
560 BackendInstanceList::const_iterator it = bc->m_backend_list.begin();
564 for (; it != bc->m_backend_list.end(); it++)
566 if (!(*it)->m_in_use)
568 BackendSetList::iterator set_it = (*it)->m_sets.begin();
569 for (; set_it != (*it)->m_sets.end(); set_it++)
571 if (now >= (*set_it)->m_time_last_use &&
572 now - (*set_it)->m_time_last_use > bc->m_backend_set_ttl)
575 result_set_id = (*set_it)->m_result_set_id;
576 found_backend->m_sets.erase(set_it);
582 size_t max_sets = bc->m_named_result_sets ? bc->m_backend_set_max : 1;
583 for (it = bc->m_backend_list.begin(); it != bc->m_backend_list.end(); it++)
585 if (!(*it)->m_in_use && (*it)->m_sets.size() < max_sets)
588 if (bc->m_named_result_sets)
590 result_set_id = boost::io::str(
591 boost::format("%1%") %
592 found_backend->m_result_set_sequence);
593 found_backend->m_result_set_sequence++;
596 result_set_id = "default";
602 void yf::SessionShared::Frontend::get_set(mp::Package &package,
603 const Z_APDU *apdu_req,
604 const Databases &databases,
605 yazpp_1::Yaz_Z_Query &query,
606 BackendInstancePtr &found_backend,
607 BackendSetPtr &found_set)
609 std::string result_set_id;
610 BackendClassPtr bc = m_backend_class;
612 boost::mutex::scoped_lock lock(bc->m_mutex_backend_class);
614 // look at each backend and see if we have a similar search
615 BackendInstanceList::const_iterator it = bc->m_backend_list.begin();
617 for (; it != bc->m_backend_list.end(); it++)
619 if (!(*it)->m_in_use)
621 BackendSetList::const_iterator set_it = (*it)->m_sets.begin();
622 for (; set_it != (*it)->m_sets.end(); set_it++)
624 if ((*set_it)->m_databases == databases
625 && query.match(&(*set_it)->m_query))
629 bc->use_backend(found_backend);
630 found_set->timestamp();
631 // found matching set. No need to search again
637 override_set(found_backend, result_set_id);
639 bc->use_backend(found_backend);
643 // create a new backend set (and new set)
644 found_backend = bc->create_backend(package);
650 if (apdu_req->which == Z_APDU_searchRequest)
652 f_apdu = odr.create_searchResponse(
653 apdu_req, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR, 0);
655 else if (apdu_req->which == Z_APDU_presentRequest)
657 f_apdu = odr.create_presentResponse(
658 apdu_req, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR, 0);
662 f_apdu = odr.create_close(
663 apdu_req, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR, 0);
665 package.response() = f_apdu;
668 if (bc->m_named_result_sets)
670 result_set_id = boost::io::str(
671 boost::format("%1%") % found_backend->m_result_set_sequence);
672 found_backend->m_result_set_sequence++;
675 result_set_id = "default";
677 // we must search ...
678 BackendSetPtr new_set(new BackendSet(result_set_id,
680 if (!new_set->search(package, apdu_req, found_backend))
682 bc->remove_backend(found_backend);
683 return; // search error
686 found_set->timestamp();
687 found_backend->m_sets.push_back(found_set);
690 void yf::SessionShared::Frontend::search(mp::Package &package,
693 Z_SearchRequest *req = apdu_req->u.searchRequest;
694 FrontendSets::iterator fset_it =
695 m_frontend_sets.find(req->resultSetName);
696 if (fset_it != m_frontend_sets.end())
698 // result set already exist
699 // if replace indicator is off: we return diagnostic if
700 // result set already exist.
701 if (*req->replaceIndicator == 0)
705 odr.create_searchResponse(
707 YAZ_BIB1_RESULT_SET_EXISTS_AND_REPLACE_INDICATOR_OFF,
709 package.response() = apdu;
713 m_frontend_sets.erase(fset_it);
716 yazpp_1::Yaz_Z_Query query;
717 query.set_Z_Query(req->query);
720 for (i = 0; i<req->num_databaseNames; i++)
721 databases.push_back(req->databaseNames[i]);
723 BackendSetPtr found_set; // null
724 BackendInstancePtr found_backend; // null
726 get_set(package, apdu_req, databases, query, found_backend, found_set);
731 Z_APDU *f_apdu = odr.create_searchResponse(apdu_req, 0, 0);
732 Z_SearchResponse *f_resp = f_apdu->u.searchResponse;
733 *f_resp->resultCount = found_set->m_result_set_size;
734 package.response() = f_apdu;
736 FrontendSetPtr fset(new FrontendSet(databases, query));
737 m_frontend_sets[req->resultSetName] = fset;
739 m_backend_class->release_backend(found_backend);
742 void yf::SessionShared::Frontend::present(mp::Package &package,
746 Z_PresentRequest *req = apdu_req->u.presentRequest;
748 FrontendSets::iterator fset_it =
749 m_frontend_sets.find(req->resultSetId);
751 if (fset_it == m_frontend_sets.end())
754 odr.create_presentResponse(
756 YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST,
758 package.response() = apdu;
761 FrontendSetPtr fset = fset_it->second;
763 Databases databases = fset->get_databases();
764 yazpp_1::Yaz_Z_Query query = fset->get_query();
766 BackendClassPtr bc = m_backend_class;
767 BackendSetPtr found_set; // null
768 BackendInstancePtr found_backend;
770 get_set(package, apdu_req, databases, query, found_backend, found_set);
774 Z_APDU *p_apdu = zget_APDU(odr, Z_APDU_presentRequest);
775 Z_PresentRequest *p_req = p_apdu->u.presentRequest;
776 p_req->preferredRecordSyntax = req->preferredRecordSyntax;
777 p_req->resultSetId = odr_strdup(odr, found_set->m_result_set_id.c_str());
778 *p_req->resultSetStartPoint = *req->resultSetStartPoint;
779 *p_req->numberOfRecordsRequested = *req->numberOfRecordsRequested;
780 p_req->preferredRecordSyntax = req->preferredRecordSyntax;
781 p_req->recordComposition = req->recordComposition;
783 Package present_package(found_backend->m_session, package.origin());
784 present_package.copy_filter(package);
786 present_package.request() = p_apdu;
788 present_package.move();
790 Z_GDU *gdu = present_package.response().get();
791 if (!present_package.session().is_closed()
792 && gdu && gdu->which == Z_GDU_Z3950
793 && gdu->u.z3950->which == Z_APDU_presentResponse)
795 Z_PresentResponse *b_resp = gdu->u.z3950->u.presentResponse;
796 Z_APDU *f_apdu_res = odr.create_presentResponse(apdu_req, 0, 0);
797 Z_PresentResponse *f_resp = f_apdu_res->u.presentResponse;
799 f_resp->numberOfRecordsReturned = b_resp->numberOfRecordsReturned;
800 f_resp->nextResultSetPosition = b_resp->nextResultSetPosition;
801 f_resp->presentStatus= b_resp->presentStatus;
802 f_resp->records = b_resp->records;
803 f_resp->otherInfo = b_resp->otherInfo;
804 package.response() = f_apdu_res;
805 bc->release_backend(found_backend);
809 bc->remove_backend(found_backend);
811 odr.create_presentResponse(
812 apdu_req, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR, 0);
813 package.response() = f_apdu_res;
817 void yf::SessionShared::Frontend::scan(mp::Package &frontend_package,
820 BackendClassPtr bc = m_backend_class;
821 BackendInstancePtr backend = bc->get_backend(frontend_package);
825 Z_APDU *apdu = odr.create_scanResponse(
826 apdu_req, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR, 0);
827 frontend_package.response() = apdu;
831 Package scan_package(backend->m_session, frontend_package.origin());
832 scan_package.copy_filter(frontend_package);
833 scan_package.request() = apdu_req;
835 frontend_package.response() = scan_package.response();
836 if (scan_package.session().is_closed())
838 frontend_package.session().close();
839 bc->remove_backend(backend);
842 bc->release_backend(backend);
846 yf::SessionShared::Worker::Worker(SessionShared::Rep *rep) : m_p(rep)
850 void yf::SessionShared::Worker::operator() (void)
855 void yf::SessionShared::BackendClass::expire()
859 boost::mutex::scoped_lock lock(m_mutex_backend_class);
860 BackendInstanceList::iterator bit = m_backend_list.begin();
861 while (bit != m_backend_list.end())
863 time_t last_use = (*bit)->m_time_last_use;
865 if ((*bit)->m_in_use)
869 else if ((now >= last_use && now - last_use > m_backend_expiry_ttl)
873 (*bit)->m_close_package->response() = odr.create_close(
874 0, Z_Close_lackOfActivity, 0);
875 (*bit)->m_close_package->session().close();
876 (*bit)->m_close_package->move();
878 bit = m_backend_list.erase(bit);
887 void yf::SessionShared::Rep::expire()
892 boost::xtime_get(&xt, boost::TIME_UTC);
894 boost::thread::sleep(xt);
896 BackendClassMap::const_iterator b_it = m_backend_map.begin();
897 for (; b_it != m_backend_map.end(); b_it++)
898 b_it->second->expire();
902 yf::SessionShared::Rep::Rep()
904 m_resultset_ttl = 30;
905 m_resultset_max = 10;
907 yf::SessionShared::Worker w(this);
908 m_thrds.add_thread(new boost::thread(w));
911 yf::SessionShared::SessionShared() : m_p(new SessionShared::Rep)
915 yf::SessionShared::~SessionShared() {
919 yf::SessionShared::Frontend::Frontend(Rep *rep) : m_is_virtual(false), m_p(rep)
923 yf::SessionShared::Frontend::~Frontend()
927 yf::SessionShared::FrontendPtr yf::SessionShared::Rep::get_frontend(mp::Package &package)
929 boost::mutex::scoped_lock lock(m_mutex);
931 std::map<mp::Session,yf::SessionShared::FrontendPtr>::iterator it;
935 it = m_clients.find(package.session());
936 if (it == m_clients.end())
939 if (!it->second->m_in_use)
941 it->second->m_in_use = true;
944 m_cond_session_ready.wait(lock);
946 FrontendPtr f(new Frontend(this));
947 m_clients[package.session()] = f;
952 void yf::SessionShared::Rep::release_frontend(mp::Package &package)
954 boost::mutex::scoped_lock lock(m_mutex);
955 std::map<mp::Session,yf::SessionShared::FrontendPtr>::iterator it;
957 it = m_clients.find(package.session());
958 if (it != m_clients.end())
960 if (package.session().is_closed())
966 it->second->m_in_use = false;
968 m_cond_session_ready.notify_all();
973 void yf::SessionShared::process(mp::Package &package) const
975 FrontendPtr f = m_p->get_frontend(package);
977 Z_GDU *gdu = package.request().get();
979 if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
980 Z_APDU_initRequest && !f->m_is_virtual)
982 m_p->init(package, gdu, f);
984 else if (!f->m_is_virtual)
986 else if (gdu && gdu->which == Z_GDU_Z3950)
988 Z_APDU *apdu = gdu->u.z3950;
989 if (apdu->which == Z_APDU_initRequest)
993 package.response() = odr.create_close(
995 Z_Close_protocolError,
998 package.session().close();
1000 else if (apdu->which == Z_APDU_close)
1004 package.response() = odr.create_close(
1006 Z_Close_peerAbort, "received close from client");
1007 package.session().close();
1009 else if (apdu->which == Z_APDU_searchRequest)
1011 f->search(package, apdu);
1013 else if (apdu->which == Z_APDU_presentRequest)
1015 f->present(package, apdu);
1017 else if (apdu->which == Z_APDU_scanRequest)
1019 f->scan(package, apdu);
1025 package.response() = odr.create_close(
1026 apdu, Z_Close_protocolError,
1027 "unsupported APDU in filter_session_shared");
1029 package.session().close();
1032 m_p->release_frontend(package);
1035 void yf::SessionShared::configure(const xmlNode *ptr, bool test_only)
1037 for (ptr = ptr->children; ptr; ptr = ptr->next)
1039 if (ptr->type != XML_ELEMENT_NODE)
1041 if (!strcmp((const char *) ptr->name, "resultset"))
1043 const struct _xmlAttr *attr;
1044 for (attr = ptr->properties; attr; attr = attr->next)
1046 if (!strcmp((const char *) attr->name, "ttl"))
1047 m_p->m_resultset_ttl =
1048 mp::xml::get_int(attr->children, 30);
1049 else if (!strcmp((const char *) attr->name, "max"))
1051 m_p->m_resultset_max =
1052 mp::xml::get_int(attr->children, 10);
1055 throw mp::filter::FilterException(
1056 "Bad attribute " + std::string((const char *)
1060 else if (!strcmp((const char *) ptr->name, "session"))
1062 const struct _xmlAttr *attr;
1063 for (attr = ptr->properties; attr; attr = attr->next)
1065 if (!strcmp((const char *) attr->name, "ttl"))
1066 m_p->m_session_ttl =
1067 mp::xml::get_int(attr->children, 120);
1069 throw mp::filter::FilterException(
1070 "Bad attribute " + std::string((const char *)
1076 throw mp::filter::FilterException("Bad element "
1077 + std::string((const char *)
1083 static mp::filter::Base* filter_creator()
1085 return new mp::filter::SessionShared;
1089 struct metaproxy_1_filter_struct metaproxy_1_filter_session_shared = {
1099 * indent-tabs-mode: nil
1100 * c-file-style: "stroustrup"
1102 * vim: shiftwidth=4 tabstop=8 expandtab