1 /* $Id: filter_virt_db.cpp,v 1.7 2005-10-25 22:44:39 adam Exp $
2 Copyright (c) 2005, Index Data.
11 #include "package.hpp"
13 #include <boost/thread/mutex.hpp>
15 #include "filter_virt_db.hpp"
19 #include <yaz/otherinfo.h>
20 #include <yaz/diagbib1.h>
26 namespace yf = yp2::filter;
31 Virt_db_set(yp2::Session &id, std::string setname,
36 yp2::Session m_backend_session;
37 std::string m_setname;
40 struct Virt_db_session {
41 Virt_db_session(yp2::Session &id, bool use_vhost);
43 yp2::Session m_session;
45 std::map<std::string,Virt_db_set> m_sets;
48 Virt_db_map(std::string vhost);
55 void release_session(Package &package);
56 void init(Package &package, Z_APDU *apdu, bool &move_later);
57 void search(Package &package, Z_APDU *apdu, bool &move_later);
58 void present(Package &package, Z_APDU *apdu, bool &move_later);
60 boost::mutex m_sessions_mutex;
61 std::map<yp2::Session,Virt_db_session>m_sessions;
62 std::map<std::string, Virt_db_map>m_maps;
64 typedef std::map<yp2::Session,Virt_db_session>::iterator Ses_it;
65 typedef std::map<std::string,Virt_db_set>::iterator Sets_it;
70 yf::Virt_db_set::Virt_db_set(yp2::Session &id, std::string setname,
72 : m_backend_session(id), m_setname(setname), m_vhost(vhost)
77 yf::Virt_db_set::Virt_db_set()
82 yf::Virt_db_set::~Virt_db_set()
86 yf::Virt_db_map::Virt_db_map(std::string vhost)
91 yf::Virt_db_map::Virt_db_map()
95 yf::Virt_db_session::Virt_db_session()
101 yf::Virt_db_session::Virt_db_session(yp2::Session &id,
103 m_session(id) , m_use_vhost(use_vhost)
108 yf::Virt_db::Virt_db() {
109 m_p = new Virt_db::Rep;
112 yf::Virt_db::~Virt_db() {
116 void yf::Virt_db::Rep::release_session(Package &package)
118 boost::mutex::scoped_lock lock(m_sessions_mutex);
120 m_sessions.erase(package.session());
123 void yf::Virt_db::Rep::present(Package &package, Z_APDU *apdu, bool &move_later){
125 std::string resultSetId;
126 Z_PresentRequest *req = apdu->u.presentRequest;
128 resultSetId = req->resultSetId;
129 boost::mutex::scoped_lock lock(m_sessions_mutex);
131 Ses_it it = m_sessions.find(package.session());
132 if (it == m_sessions.end())
134 ODR odr = odr_createmem(ODR_ENCODE);
136 Z_APDU *apdu = zget_APDU(odr, Z_APDU_close);
138 *apdu->u.close->closeReason = Z_Close_protocolError;
139 apdu->u.close->diagnosticInformation =
140 odr_strdup(odr, "no session for present request");
142 package.response() = apdu;
143 package.session().close();
148 if (it->second.m_use_vhost)
153 Sets_it sets_it = it->second.m_sets.find(resultSetId);
154 if (sets_it == it->second.m_sets.end())
156 ODR odr = odr_createmem(ODR_ENCODE);
157 Z_APDU *apdu = zget_APDU(odr, Z_APDU_presentResponse);
159 Z_Records *rec = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
160 apdu->u.presentResponse->records = rec;
161 rec->which = Z_Records_NSD;
162 rec->u.nonSurrogateDiagnostic =
163 zget_DefaultDiagFormat(
165 YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST,
166 resultSetId.c_str());
167 package.response() = apdu;
171 id = new yp2::Session(sets_it->second.m_backend_session);
173 ODR odr = odr_createmem(ODR_ENCODE);
175 // sending present to backend
176 Package present_package(*id, package.origin());
177 present_package.copy_filter(package);
179 req->resultSetId = odr_strdup(odr, "default");
180 present_package.request() = yazpp_1::GDU(apdu);
184 present_package.move();
186 if (present_package.session().is_closed())
188 ODR odr = odr_createmem(ODR_ENCODE);
189 Z_APDU *apdu = zget_APDU(odr, Z_APDU_presentResponse);
191 Z_Records *rec = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
192 apdu->u.presentResponse->records = rec;
193 rec->which = Z_Records_NSD;
194 rec->u.nonSurrogateDiagnostic =
195 zget_DefaultDiagFormat(
197 YAZ_BIB1_RESULT_SET_NO_LONGER_EXISTS_UNILATERALLY_DELETED_BY_,
198 resultSetId.c_str());
199 package.response() = apdu;
203 boost::mutex::scoped_lock lock(m_sessions_mutex);
204 Ses_it it = m_sessions.find(package.session());
205 if (it != m_sessions.end())
206 it->second.m_sets.erase(resultSetId);
210 package.response() = present_package.response();
215 void yf::Virt_db::Rep::search(Package &package, Z_APDU *apdu, bool &move_later)
217 Z_SearchRequest *req = apdu->u.searchRequest;
219 std::string database;
221 boost::mutex::scoped_lock lock(m_sessions_mutex);
223 Ses_it it = m_sessions.find(package.session());
224 if (it == m_sessions.end())
226 ODR odr = odr_createmem(ODR_ENCODE);
228 Z_APDU *apdu = zget_APDU(odr, Z_APDU_close);
230 *apdu->u.close->closeReason = Z_Close_protocolError;
231 apdu->u.close->diagnosticInformation =
232 odr_strdup(odr, "no session for search request");
234 package.response() = apdu;
235 package.session().close();
239 if (it->second.m_use_vhost)
244 if (req->num_databaseNames != 1)
245 { // exactly one database must be specified
246 ODR odr = odr_createmem(ODR_ENCODE);
247 Z_APDU *apdu = zget_APDU(odr, Z_APDU_searchResponse);
249 Z_Records *rec = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
250 apdu->u.searchResponse->records = rec;
251 rec->which = Z_Records_NSD;
252 rec->u.nonSurrogateDiagnostic =
253 zget_DefaultDiagFormat(
254 odr, YAZ_BIB1_TOO_MANY_DATABASES_SPECIFIED, 0);
255 package.response() = apdu;
260 database = req->databaseNames[0];
261 std::map<std::string, Virt_db_map>::iterator map_it;
262 map_it = m_maps.find(database);
263 if (map_it == m_maps.end())
264 { // no map for database: return diagnostic
265 ODR odr = odr_createmem(ODR_ENCODE);
266 Z_APDU *apdu = zget_APDU(odr, Z_APDU_searchResponse);
268 Z_Records *rec = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
269 apdu->u.searchResponse->records = rec;
270 rec->which = Z_Records_NSD;
271 rec->u.nonSurrogateDiagnostic =
272 zget_DefaultDiagFormat(
273 odr, YAZ_BIB1_DATABASE_UNAVAILABLE, database.c_str());
274 package.response() = apdu;
279 if (*req->replaceIndicator == 0)
281 Sets_it sets_it = it->second.m_sets.find(req->resultSetName);
282 if (sets_it != it->second.m_sets.end())
284 ODR odr = odr_createmem(ODR_ENCODE);
285 Z_APDU *apdu = zget_APDU(odr, Z_APDU_searchResponse);
287 Z_Records *rec = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
288 apdu->u.searchResponse->records = rec;
289 rec->which = Z_Records_NSD;
290 rec->u.nonSurrogateDiagnostic =
291 zget_DefaultDiagFormat(
293 YAZ_BIB1_RESULT_SET_EXISTS_AND_REPLACE_INDICATOR_OFF,
295 package.response() = apdu;
301 it->second.m_sets.erase(req->resultSetName);
302 vhost = map_it->second.m_vhost;
304 // we might look for an existing session with same vhost
306 const char *vhost_cstr = vhost.c_str();
308 { // sending init to backend
309 Package init_package(id, package.origin());
310 init_package.copy_filter(package);
312 ODR odr = odr_createmem(ODR_ENCODE);
313 Z_APDU *init_apdu = zget_APDU(odr, Z_APDU_initRequest);
315 yaz_oi_set_string_oidval(&init_apdu->u.initRequest->otherInfo, odr,
316 VAL_PROXY, 1, vhost_cstr);
318 init_package.request() = init_apdu;
321 init_package.move(); // sending init
323 if (init_package.session().is_closed())
325 ODR odr = odr_createmem(ODR_ENCODE);
326 Z_APDU *apdu = zget_APDU(odr, Z_APDU_searchResponse);
328 Z_Records *rec = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
329 apdu->u.searchResponse->records = rec;
330 rec->which = Z_Records_NSD;
331 rec->u.nonSurrogateDiagnostic =
332 zget_DefaultDiagFormat(
333 odr, YAZ_BIB1_DATABASE_UNAVAILABLE, database.c_str());
334 package.response() = apdu;
339 // sending search to backend
340 Package search_package(id, package.origin());
342 search_package.copy_filter(package);
343 const char *sep = strchr(vhost_cstr, '/');
344 ODR odr = odr_createmem(ODR_ENCODE);
346 req->databaseNames[0] = odr_strdup(odr, sep+1);
348 *req->replaceIndicator = 1;
349 req->resultSetName = odr_strdup(odr, "default");
350 search_package.request() = yazpp_1::GDU(apdu);
354 search_package.move();
356 if (search_package.session().is_closed())
358 ODR odr = odr_createmem(ODR_ENCODE);
359 Z_APDU *apdu = zget_APDU(odr, Z_APDU_searchResponse);
361 Z_Records *rec = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
362 apdu->u.searchResponse->records = rec;
363 rec->which = Z_Records_NSD;
364 rec->u.nonSurrogateDiagnostic =
365 zget_DefaultDiagFormat(
366 odr, YAZ_BIB1_DATABASE_UNAVAILABLE, database.c_str());
367 package.response() = apdu;
372 package.response() = search_package.response();
374 boost::mutex::scoped_lock lock(m_sessions_mutex);
375 Ses_it it = m_sessions.find(package.session());
376 if (it != m_sessions.end())
377 it->second.m_sets[req->resultSetName] =
378 Virt_db_set(id, req->resultSetName, vhost);
381 void yf::Virt_db::Rep::init(Package &package, Z_APDU *apdu, bool &move_later)
383 release_session(package);
384 boost::mutex::scoped_lock lock(m_sessions_mutex);
386 Z_InitRequest *req = apdu->u.initRequest;
389 yaz_oi_get_string_oidval(&req->otherInfo, VAL_PROXY, 1, 0);
392 ODR odr = odr_createmem(ODR_ENCODE);
394 Z_APDU *apdu = zget_APDU(odr, Z_APDU_initResponse);
395 Z_InitResponse *resp = apdu->u.initResponse;
398 static const int masks[] = {
399 Z_Options_search, Z_Options_present, Z_Options_namedResultSets, -1
401 for (i = 0; masks[i] != -1; i++)
402 if (ODR_MASK_GET(req->options, masks[i]))
403 ODR_MASK_SET(resp->options, masks[i]);
405 static const int versions[] = {
411 for (i = 0; versions[i] != -1; i++)
412 if (ODR_MASK_GET(req->protocolVersion, versions[i]))
413 ODR_MASK_SET(resp->protocolVersion, versions[i]);
417 package.response() = apdu;
421 m_sessions[package.session()] = Virt_db_session(package.session(), false);
425 m_sessions[package.session()] = Virt_db_session(package.session(), true);
430 void yf::Virt_db::add_map_db2vhost(std::string db, std::string vhost)
432 m_p->m_maps[db] = Virt_db_map(vhost);
435 void yf::Virt_db::process(Package &package) const
437 Z_GDU *gdu = package.request().get();
439 if (!gdu || gdu->which != Z_GDU_Z3950)
443 bool move_later = false;
444 Z_APDU *apdu = gdu->u.z3950;
445 if (apdu->which == Z_APDU_initRequest)
447 m_p->init(package, apdu, move_later);
449 else if (apdu->which == Z_APDU_searchRequest)
451 m_p->search(package, apdu, move_later);
453 else if (apdu->which == Z_APDU_presentRequest)
455 m_p->present(package, apdu, move_later);
459 ODR odr = odr_createmem(ODR_ENCODE);
461 Z_APDU *apdu = zget_APDU(odr, Z_APDU_close);
463 *apdu->u.close->closeReason = Z_Close_protocolError;
465 apdu->u.close->diagnosticInformation =
466 odr_strdup(odr, "unsupported APDU in filter_virt_db");
468 package.response() = apdu;
469 package.session().close();
475 if (package.session().is_closed())
476 m_p->release_session(package);
483 * indent-tabs-mode: nil
484 * c-file-style: "stroustrup"
486 * vim: shiftwidth=4 tabstop=8 expandtab