1 /* $Id: filter_virt_db.cpp,v 1.4 2005-10-25 15:19:39 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_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_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 Ses_it it = m_sessions.find(package.session());
122 if (it != m_sessions.end())
123 m_sessions.erase(it);
126 void yf::Virt_db::Rep::present(Package &package, Z_APDU *apdu, bool &move_later){
128 Z_PresentRequest *req = apdu->u.presentRequest;
130 boost::mutex::scoped_lock lock(m_sessions_mutex);
132 Ses_it it = m_sessions.find(package.session());
133 if (it == m_sessions.end())
135 ODR odr = odr_createmem(ODR_ENCODE);
137 Z_APDU *apdu = zget_APDU(odr, Z_APDU_close);
139 *apdu->u.close->closeReason = Z_Close_protocolError;
140 apdu->u.close->diagnosticInformation =
141 odr_strdup(odr, "no session for present request");
143 package.response() = apdu;
144 package.session().close();
149 if (it->second.m_use_vhost)
154 Sets_it sets_it = it->second.m_sets.find(req->resultSetId);
155 if (sets_it == it->second.m_sets.end())
157 ODR odr = odr_createmem(ODR_ENCODE);
158 Z_APDU *apdu = zget_APDU(odr, Z_APDU_presentResponse);
160 Z_Records *rec = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
161 apdu->u.presentResponse->records = rec;
162 rec->which = Z_Records_NSD;
163 rec->u.nonSurrogateDiagnostic =
164 zget_DefaultDiagFormat(
166 YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST,
168 package.response() = apdu;
172 id = new yp2::Session(it->second.m_session);
174 ODR odr = odr_createmem(ODR_ENCODE);
176 // sending present to backend
177 Package present_package(*id, package.origin());
178 present_package.copy_filter(package);
180 req->resultSetId = odr_strdup(odr, "default");
181 present_package.request() = yazpp_1::GDU(apdu);
185 present_package.move();
187 package.response() = present_package.response();
188 // must check for a closed present session..
192 void yf::Virt_db::Rep::search(Package &package, Z_APDU *apdu, bool &move_later)
194 Z_SearchRequest *req = apdu->u.searchRequest;
196 std::string database;
199 boost::mutex::scoped_lock lock(m_sessions_mutex);
201 Ses_it it = m_sessions.find(package.session());
202 if (it == m_sessions.end())
204 ODR odr = odr_createmem(ODR_ENCODE);
206 Z_APDU *apdu = zget_APDU(odr, Z_APDU_close);
208 *apdu->u.close->closeReason = Z_Close_protocolError;
210 package.response() = apdu;
211 package.session().close();
215 if (it->second.m_use_vhost)
220 if (req->num_databaseNames != 1)
221 { // exactly one database must be specified
222 ODR odr = odr_createmem(ODR_ENCODE);
223 Z_APDU *apdu = zget_APDU(odr, Z_APDU_searchResponse);
225 Z_Records *rec = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
226 apdu->u.searchResponse->records = rec;
227 rec->which = Z_Records_NSD;
228 rec->u.nonSurrogateDiagnostic =
229 zget_DefaultDiagFormat(
230 odr, YAZ_BIB1_TOO_MANY_DATABASES_SPECIFIED, 0);
231 package.response() = apdu;
236 database = req->databaseNames[0];
237 std::map<std::string, Virt_db_map>::iterator map_it;
238 map_it = m_maps.find(database);
239 if (map_it == m_maps.end())
240 { // no map for database: return diagnostic
241 ODR odr = odr_createmem(ODR_ENCODE);
242 Z_APDU *apdu = zget_APDU(odr, Z_APDU_searchResponse);
244 Z_Records *rec = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
245 apdu->u.searchResponse->records = rec;
246 rec->which = Z_Records_NSD;
247 rec->u.nonSurrogateDiagnostic =
248 zget_DefaultDiagFormat(
249 odr, YAZ_BIB1_DATABASE_UNAVAILABLE, database.c_str());
250 package.response() = apdu;
255 if (*req->replaceIndicator == 0)
257 Sets_it sets_it = it->second.m_sets.find(req->resultSetName);
258 if (sets_it != it->second.m_sets.end())
260 ODR odr = odr_createmem(ODR_ENCODE);
261 Z_APDU *apdu = zget_APDU(odr, Z_APDU_searchResponse);
263 Z_Records *rec = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
264 apdu->u.searchResponse->records = rec;
265 rec->which = Z_Records_NSD;
266 rec->u.nonSurrogateDiagnostic =
267 zget_DefaultDiagFormat(
269 YAZ_BIB1_RESULT_SET_EXISTS_AND_REPLACE_INDICATOR_OFF,
271 package.response() = apdu;
277 vhost = map_it->second.m_vhost;
280 it->second.m_sets[req->resultSetName] =
281 Virt_db_set(*id, req->resultSetName, vhost);
283 const char *vhost_cstr = vhost.c_str();
285 { // sending init to backend
286 Package init_package(*id, package.origin());
287 init_package.copy_filter(package);
289 ODR odr = odr_createmem(ODR_ENCODE);
290 Z_APDU *init_apdu = zget_APDU(odr, Z_APDU_initRequest);
292 yaz_oi_set_string_oidval(&init_apdu->u.initRequest->otherInfo, odr,
293 VAL_PROXY, 1, vhost_cstr);
295 init_package.request() = init_apdu;
298 init_package.move(); // sending init
300 if (init_package.session().is_closed())
302 ODR odr = odr_createmem(ODR_ENCODE);
303 Z_APDU *apdu = zget_APDU(odr, Z_APDU_searchResponse);
305 Z_Records *rec = (Z_Records *) odr_malloc(odr, sizeof(Z_Records));
306 apdu->u.searchResponse->records = rec;
307 rec->which = Z_Records_NSD;
308 rec->u.nonSurrogateDiagnostic =
309 zget_DefaultDiagFormat(
310 odr, YAZ_BIB1_DATABASE_UNAVAILABLE, database.c_str());
311 package.response() = apdu;
317 // sending search to backend
318 Package search_package(*id, package.origin());
320 search_package.copy_filter(package);
321 const char *sep = strchr(vhost_cstr, '/');
322 ODR odr = odr_createmem(ODR_ENCODE);
324 req->databaseNames[0] = odr_strdup(odr, sep+1);
326 *req->replaceIndicator = 1;
327 req->resultSetName = odr_strdup(odr, "default");
328 search_package.request() = yazpp_1::GDU(apdu);
332 search_package.move();
334 package.response() = search_package.response();
335 // must check for a closed search session..
339 void yf::Virt_db::Rep::init(Package &package, Z_APDU *apdu, bool &move_later)
341 release_session(package);
342 boost::mutex::scoped_lock lock(m_sessions_mutex);
344 Z_InitRequest *req = apdu->u.initRequest;
347 yaz_oi_get_string_oidval(&req->otherInfo, VAL_PROXY, 1, 0);
350 ODR odr = odr_createmem(ODR_ENCODE);
352 Z_APDU *apdu = zget_APDU(odr, Z_APDU_initResponse);
353 Z_InitResponse *resp = apdu->u.initResponse;
356 static const int masks[] = {
357 Z_Options_search, Z_Options_present, Z_Options_namedResultSets, -1
359 for (i = 0; masks[i] != -1; i++)
360 if (ODR_MASK_GET(req->options, masks[i]))
361 ODR_MASK_SET(resp->options, masks[i]);
363 static const int versions[] = {
369 for (i = 0; versions[i] != -1; i++)
370 if (ODR_MASK_GET(req->protocolVersion, versions[i]))
371 ODR_MASK_SET(resp->protocolVersion, versions[i]);
375 package.response() = apdu;
379 m_sessions[package.session()] = Virt_db_session(package.session(), false);
383 m_sessions[package.session()] = Virt_db_session(package.session(), true);
388 void yf::Virt_db::add_map_db2vhost(std::string db, std::string vhost)
390 m_p->m_maps[db] = Virt_db_map(vhost);
393 void yf::Virt_db::process(Package &package) const
395 Z_GDU *gdu = package.request().get();
397 if (!gdu || gdu->which != Z_GDU_Z3950)
401 bool move_later = false;
402 Z_APDU *apdu = gdu->u.z3950;
403 if (apdu->which == Z_APDU_initRequest)
405 m_p->init(package, apdu, move_later);
407 else if (apdu->which == Z_APDU_searchRequest)
409 m_p->search(package, apdu, move_later);
411 else if (apdu->which == Z_APDU_presentRequest)
413 m_p->present(package, apdu, move_later);
417 ODR odr = odr_createmem(ODR_ENCODE);
419 Z_APDU *apdu = zget_APDU(odr, Z_APDU_close);
421 *apdu->u.close->closeReason = Z_Close_protocolError;
423 apdu->u.close->diagnosticInformation =
424 odr_strdup(odr, "unsupported APDU in filter_virt_db");
426 package.response() = apdu;
427 package.session().close();
433 if (package.session().is_closed())
434 m_p->release_session(package);
441 * indent-tabs-mode: nil
442 * c-file-style: "stroustrup"
444 * vim: shiftwidth=4 tabstop=8 expandtab